local pandoc = require("pandoc")
print("zotero-live-citations cd1ef3f")
local mt, latest = pandoc.mediabag.fetch("https://retorque.re/zotero-better-bibtex/exporting/zotero.lua.revision")
latest = string.sub(latest, 1, 10)
if "cd1ef3f" ~= latest then
	print('new version "' .. latest .. '" available at https://retorque.re/zotero-better-bibtex/exporting')
end

do
	local _ENV = _ENV
	package.preload["locator"] = function(...)
		local arg = _G.arg
		local utils = require("utils")
		-- local lpeg = require('lpeg')

		local book = (lpeg.P("book") + lpeg.P("bk.") + lpeg.P("bks.")) / "book"
		local chapter = (lpeg.P("chapter") + lpeg.P("chap.") + lpeg.P("chaps.")) / "chapter"
		local column = (lpeg.P("column") + lpeg.P("col.") + lpeg.P("cols.")) / "column"
		local figure = (lpeg.P("figure") + lpeg.P("fig.") + lpeg.P("figs.")) / "figure"
		local folio = (lpeg.P("folio") + lpeg.P("fol.") + lpeg.P("fols.")) / "folio"
		local number = (lpeg.P("number") + lpeg.P("no.") + lpeg.P("nos.")) / "number"
		local line = (lpeg.P("line") + lpeg.P("l.") + lpeg.P("ll.")) / "line"
		local note = (lpeg.P("note") + lpeg.P("n.") + lpeg.P("nn.")) / "note"
		local opus = (lpeg.P("opus") + lpeg.P("op.") + lpeg.P("opp.")) / "opus"
		local page = (lpeg.P("page") + lpeg.P("p.") + lpeg.P("pp.")) / "page"
		local paragraph = (
			lpeg.P("paragraph")
			+ lpeg.P("para.")
			+ lpeg.P("paras.")
			+ lpeg.P("¶¶")
			+ lpeg.P("¶")
		) / "paragraph"
		local part = (lpeg.P("part") + lpeg.P("pt.") + lpeg.P("pts.")) / "part"
		local section = (lpeg.P("section") + lpeg.P("sec.") + lpeg.P("secs.") + lpeg.P("§§") + lpeg.P("§"))
			/ "section"
		local subverbo = (lpeg.P("sub verbo") + lpeg.P("s.v.") + lpeg.P("s.vv.")) / "sub verbo"
		local verse = (lpeg.P("verse") + lpeg.P("v.") + lpeg.P("vv.")) / "verse"
		local volume = (lpeg.P("volume") + lpeg.P("vol.") + lpeg.P("vols.")) / "volume"
		local label = book
			+ chapter
			+ column
			+ figure
			+ folio
			+ number
			+ line
			+ note
			+ opus
			+ page
			+ paragraph
			+ part
			+ section
			+ subverbo
			+ verse
			+ volume

		local whitespace = lpeg.P(" ") ^ 0
		local nonspace = lpeg.P(1) - lpeg.S(" ")
		local nonbrace = lpeg.P(1) - lpeg.S("{}")

		local word = nonspace ^ 1 / 1
		-- local roman = lpeg.S('IiVvXxLlCcDdMm]')^1
		local number = lpeg.R("09") ^ 1 -- + roman

		local numbers = number * (whitespace * lpeg.S("-") ^ 1 * whitespace * number) ^ -1
		local ranges = (numbers * (whitespace * lpeg.P(",") * whitespace * numbers) ^ 0) / 1

		-- local braced_locator = lpeg.P('{') * lpeg.Cs(label + lpeg.Cc('page')) * whitespace * lpeg.C(nonbrace^1) * lpeg.P('}')
		local braced_locator = lpeg.P("{") * label * whitespace * lpeg.C(nonbrace ^ 1) * lpeg.P("}")
		local braced_implicit_locator = lpeg.P("{") * lpeg.Cc("page") * lpeg.Cs(numbers) * lpeg.P("}")
		local locator = braced_locator
			+ braced_implicit_locator
			+ (label * whitespace * ranges)
			+ (label * whitespace * word)
			+ (lpeg.Cc("page") * ranges)
		local remainder = lpeg.C(lpeg.P(1) ^ 0)

		local suffix = lpeg.C(lpeg.P(",") ^ -1 * whitespace) * locator * remainder

		local pseudo_locator = lpeg.C(lpeg.P(",") ^ -1 * whitespace)
			* lpeg.P("{")
			* lpeg.C(nonbrace ^ 0)
			* lpeg.P("}")
			* remainder

		local module = {}

		function module.parse(input)
			local parsed, _prefix, _label, _locator, _suffix

			parsed = lpeg.Ct(suffix):match(input)
			if parsed then
				_prefix, _label, _locator, _suffix = table.unpack(parsed)
			else
				parsed = lpeg.Ct(pseudo_locator):match(input)
				if parsed then
					_label = "page"
					_prefix, _locator, _suffix = table.unpack(parsed)
				else
					return nil, nil, input
				end
			end

			if utils.trim(_prefix) == "," then
				_prefix = ""
			end
			local _space = ""
			if utils.trim(_prefix) ~= _prefix then
				_space = " "
			end

			_prefix = utils.trim(_prefix)
			_label = utils.trim(_label)
			_locator = utils.trim(_locator)
			_suffix = utils.trim(_suffix)

			return _label, _locator, utils.trim(_prefix .. _space .. _suffix)
		end

		return module
	end
end

do
	local _ENV = _ENV
	package.preload["lunajson"] = function(...)
		local arg = _G.arg
		local newdecoder = require("lunajson.decoder")
		local newencoder = require("lunajson.encoder")
		local sax = require("lunajson.sax")
		-- If you need multiple contexts of decoder and/or encoder,
		-- you can require lunajson.decoder and/or lunajson.encoder directly.
		return {
			decode = newdecoder(),
			encode = newencoder(),
			newparser = sax.newparser,
			newfileparser = sax.newfileparser,
		}
	end
end

do
	local _ENV = _ENV
	package.preload["lunajson.decoder"] = function(...)
		local arg = _G.arg
		local setmetatable, tonumber, tostring = setmetatable, tonumber, tostring
		local floor, inf = math.floor, math.huge
		local mininteger, tointeger = math.mininteger or nil, math.tointeger or nil
		local byte, char, find, gsub, match, sub =
			string.byte, string.char, string.find, string.gsub, string.match, string.sub

		local function _decode_error(pos, errmsg)
			error("parse error at " .. pos .. ": " .. errmsg, 2)
		end

		local f_str_ctrl_pat
		if _VERSION == "Lua 5.1" then
			-- use the cluttered pattern because lua 5.1 does not handle \0 in a pattern correctly
			f_str_ctrl_pat = "[^\32-\255]"
		else
			f_str_ctrl_pat = "[\0-\31]"
		end

		local _ENV = nil

		local function newdecoder()
			local json, pos, nullv, arraylen, rec_depth

			-- `f` is the temporary for dispatcher[c] and
			-- the dummy for the first return value of `find`
			local dispatcher, f

			--[[
		Helper
	--]]
			local function decode_error(errmsg)
				return _decode_error(pos, errmsg)
			end

			--[[
		Invalid
	--]]
			local function f_err()
				decode_error("invalid value")
			end

			--[[
		Constants
	--]]
			-- null
			local function f_nul()
				if sub(json, pos, pos + 2) == "ull" then
					pos = pos + 3
					return nullv
				end
				decode_error("invalid value")
			end

			-- false
			local function f_fls()
				if sub(json, pos, pos + 3) == "alse" then
					pos = pos + 4
					return false
				end
				decode_error("invalid value")
			end

			-- true
			local function f_tru()
				if sub(json, pos, pos + 2) == "rue" then
					pos = pos + 3
					return true
				end
				decode_error("invalid value")
			end

			--[[
		Numbers
		Conceptually, the longest prefix that matches to `[-+.0-9A-Za-z]+` (in regexp)
		is captured as a number and its conformance to the JSON spec is checked.
	--]]
			-- deal with non-standard locales
			local radixmark = match(tostring(0.5), "[^0-9]")
			local fixedtonumber = tonumber
			if radixmark ~= "." then
				if find(radixmark, "%W") then
					radixmark = "%" .. radixmark
				end
				fixedtonumber = function(s)
					return tonumber(gsub(s, ".", radixmark))
				end
			end

			local function number_error()
				return decode_error("invalid number")
			end

			-- `0(\.[0-9]*)?([eE][+-]?[0-9]*)?`
			local function f_zro(mns)
				local num, c = match(json, "^(%.?[0-9]*)([-+.A-Za-z]?)", pos) -- skipping 0

				if num == "" then
					if c == "" then
						if mns then
							return -0.0
						end
						return 0
					end

					if c == "e" or c == "E" then
						num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
						if c == "" then
							pos = pos + #num
							if mns then
								return -0.0
							end
							return 0.0
						end
					end
					number_error()
				end

				if byte(num) ~= 0x2E or byte(num, -1) == 0x2E then
					number_error()
				end

				if c ~= "" then
					if c == "e" or c == "E" then
						num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
					end
					if c ~= "" then
						number_error()
					end
				end

				pos = pos + #num
				c = fixedtonumber(num)

				if mns then
					c = -c
				end
				return c
			end

			-- `[1-9][0-9]*(\.[0-9]*)?([eE][+-]?[0-9]*)?`
			local function f_num(mns)
				pos = pos - 1
				local num, c = match(json, "^([0-9]+%.?[0-9]*)([-+.A-Za-z]?)", pos)
				if byte(num, -1) == 0x2E then -- error if ended with period
					number_error()
				end

				if c ~= "" then
					if c ~= "e" and c ~= "E" then
						number_error()
					end
					num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
					if not num or c ~= "" then
						number_error()
					end
				end

				pos = pos + #num
				c = fixedtonumber(num)

				if mns then
					c = -c
					if c == mininteger and not find(num, "[^0-9]") then
						c = mininteger
					end
				end
				return c
			end

			-- skip minus sign
			local function f_mns()
				local c = byte(json, pos)
				if c then
					pos = pos + 1
					if c > 0x30 then
						if c < 0x3A then
							return f_num(true)
						end
					else
						if c > 0x2F then
							return f_zro(true)
						end
					end
				end
				decode_error("invalid number")
			end

			--[[
		Strings
	--]]
			local f_str_hextbl = {
				0x0,
				0x1,
				0x2,
				0x3,
				0x4,
				0x5,
				0x6,
				0x7,
				0x8,
				0x9,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				0xA,
				0xB,
				0xC,
				0xD,
				0xE,
				0xF,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				0xA,
				0xB,
				0xC,
				0xD,
				0xE,
				0xF,
				__index = function()
					return inf
				end,
			}
			setmetatable(f_str_hextbl, f_str_hextbl)

			local f_str_escapetbl = {
				['"'] = '"',
				["\\"] = "\\",
				["/"] = "/",
				["b"] = "\b",
				["f"] = "\f",
				["n"] = "\n",
				["r"] = "\r",
				["t"] = "\t",
				__index = function()
					decode_error("invalid escape sequence")
				end,
			}
			setmetatable(f_str_escapetbl, f_str_escapetbl)

			local function surrogate_first_error()
				return decode_error("1st surrogate pair byte not continued by 2nd")
			end

			local f_str_surrogate_prev = 0
			local function f_str_subst(ch, ucode)
				if ch == "u" then
					local c1, c2, c3, c4, rest = byte(ucode, 1, 5)
					ucode = f_str_hextbl[c1 - 47] * 0x1000
						+ f_str_hextbl[c2 - 47] * 0x100
						+ f_str_hextbl[c3 - 47] * 0x10
						+ f_str_hextbl[c4 - 47]
					if ucode ~= inf then
						if ucode < 0x80 then -- 1byte
							if rest then
								return char(ucode, rest)
							end
							return char(ucode)
						elseif ucode < 0x800 then -- 2bytes
							c1 = floor(ucode / 0x40)
							c2 = ucode - c1 * 0x40
							c1 = c1 + 0xC0
							c2 = c2 + 0x80
							if rest then
								return char(c1, c2, rest)
							end
							return char(c1, c2)
						elseif ucode < 0xD800 or 0xE000 <= ucode then -- 3bytes
							c1 = floor(ucode / 0x1000)
							ucode = ucode - c1 * 0x1000
							c2 = floor(ucode / 0x40)
							c3 = ucode - c2 * 0x40
							c1 = c1 + 0xE0
							c2 = c2 + 0x80
							c3 = c3 + 0x80
							if rest then
								return char(c1, c2, c3, rest)
							end
							return char(c1, c2, c3)
						elseif 0xD800 <= ucode and ucode < 0xDC00 then -- surrogate pair 1st
							if f_str_surrogate_prev == 0 then
								f_str_surrogate_prev = ucode
								if not rest then
									return ""
								end
								surrogate_first_error()
							end
							f_str_surrogate_prev = 0
							surrogate_first_error()
						else -- surrogate pair 2nd
							if f_str_surrogate_prev ~= 0 then
								ucode = 0x10000 + (f_str_surrogate_prev - 0xD800) * 0x400 + (ucode - 0xDC00)
								f_str_surrogate_prev = 0
								c1 = floor(ucode / 0x40000)
								ucode = ucode - c1 * 0x40000
								c2 = floor(ucode / 0x1000)
								ucode = ucode - c2 * 0x1000
								c3 = floor(ucode / 0x40)
								c4 = ucode - c3 * 0x40
								c1 = c1 + 0xF0
								c2 = c2 + 0x80
								c3 = c3 + 0x80
								c4 = c4 + 0x80
								if rest then
									return char(c1, c2, c3, c4, rest)
								end
								return char(c1, c2, c3, c4)
							end
							decode_error("2nd surrogate pair byte appeared without 1st")
						end
					end
					decode_error("invalid unicode codepoint literal")
				end
				if f_str_surrogate_prev ~= 0 then
					f_str_surrogate_prev = 0
					surrogate_first_error()
				end
				return f_str_escapetbl[ch] .. ucode
			end

			-- caching interpreted keys for speed
			local f_str_keycache = setmetatable({}, { __mode = "v" })

			local function f_str(iskey)
				local newpos = pos
				local tmppos, c1, c2
				repeat
					newpos = find(json, '"', newpos, true) -- search '"'
					if not newpos then
						decode_error("unterminated string")
					end
					tmppos = newpos - 1
					newpos = newpos + 1
					c1, c2 = byte(json, tmppos - 1, tmppos)
					if c2 == 0x5C and c1 == 0x5C then -- skip preceding '\\'s
						repeat
							tmppos = tmppos - 2
							c1, c2 = byte(json, tmppos - 1, tmppos)
						until c2 ~= 0x5C or c1 ~= 0x5C
						tmppos = newpos - 2
					end
				until c2 ~= 0x5C -- leave if '"' is not preceded by '\'

				local str = sub(json, pos, tmppos)
				pos = newpos

				if iskey then -- check key cache
					tmppos = f_str_keycache[str] -- reuse tmppos for cache key/val
					if tmppos then
						return tmppos
					end
					tmppos = str
				end

				if find(str, f_str_ctrl_pat) then
					decode_error("unescaped control string")
				end
				if find(str, "\\", 1, true) then -- check whether a backslash exists
					-- We need to grab 4 characters after the escape char,
					-- for encoding unicode codepoint to UTF-8.
					-- As we need to ensure that every first surrogate pair byte is
					-- immediately followed by second one, we grab upto 5 characters and
					-- check the last for this purpose.
					str = gsub(str, "\\(.)([^\\]?[^\\]?[^\\]?[^\\]?[^\\]?)", f_str_subst)
					if f_str_surrogate_prev ~= 0 then
						f_str_surrogate_prev = 0
						decode_error("1st surrogate pair byte not continued by 2nd")
					end
				end
				if iskey then -- commit key cache
					f_str_keycache[tmppos] = str
				end
				return str
			end

			--[[
		Arrays, Objects
	--]]
			-- array
			local function f_ary()
				rec_depth = rec_depth + 1
				if rec_depth > 1000 then
					decode_error("too deeply nested json (> 1000)")
				end
				local ary = {}

				pos = match(json, "^[ \n\r\t]*()", pos)

				local i = 0
				if byte(json, pos) == 0x5D then -- check closing bracket ']' which means the array empty
					pos = pos + 1
				else
					local newpos = pos
					repeat
						i = i + 1
						f = dispatcher[byte(json, newpos)] -- parse value
						pos = newpos + 1
						ary[i] = f()
						newpos = match(json, "^[ \n\r\t]*,[ \n\r\t]*()", pos) -- check comma
					until not newpos

					newpos = match(json, "^[ \n\r\t]*%]()", pos) -- check closing bracket
					if not newpos then
						decode_error("no closing bracket of an array")
					end
					pos = newpos
				end

				if arraylen then -- commit the length of the array if `arraylen` is set
					ary[0] = i
				end
				rec_depth = rec_depth - 1
				return ary
			end

			-- objects
			local function f_obj()
				rec_depth = rec_depth + 1
				if rec_depth > 1000 then
					decode_error("too deeply nested json (> 1000)")
				end
				local obj = {}

				pos = match(json, "^[ \n\r\t]*()", pos)
				if byte(json, pos) == 0x7D then -- check closing bracket '}' which means the object empty
					pos = pos + 1
				else
					local newpos = pos

					repeat
						if byte(json, newpos) ~= 0x22 then -- check '"'
							decode_error("not key")
						end
						pos = newpos + 1
						local key = f_str(true) -- parse key

						-- optimized for compact json
						-- c1, c2 == ':', <the first char of the value> or
						-- c1, c2, c3 == ':', ' ', <the first char of the value>
						f = f_err
						local c1, c2, c3 = byte(json, pos, pos + 3)
						if c1 == 0x3A then
							if c2 ~= 0x20 then
								f = dispatcher[c2]
								newpos = pos + 2
							else
								f = dispatcher[c3]
								newpos = pos + 3
							end
						end
						if f == f_err then -- read a colon and arbitrary number of spaces
							newpos = match(json, "^[ \n\r\t]*:[ \n\r\t]*()", pos)
							if not newpos then
								decode_error("no colon after a key")
							end
							f = dispatcher[byte(json, newpos)]
							newpos = newpos + 1
						end
						pos = newpos
						obj[key] = f() -- parse value
						newpos = match(json, "^[ \n\r\t]*,[ \n\r\t]*()", pos)
					until not newpos

					newpos = match(json, "^[ \n\r\t]*}()", pos)
					if not newpos then
						decode_error("no closing bracket of an object")
					end
					pos = newpos
				end

				rec_depth = rec_depth - 1
				return obj
			end

			--[[
		The jump table to dispatch a parser for a value,
		indexed by the code of the value's first char.
		Nil key means the end of json.
	--]]
			dispatcher = {
				[0] = f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_str,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_mns,
				f_err,
				f_err,
				f_zro,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_ary,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_fls,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_nul,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_tru,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_obj,
				f_err,
				f_err,
				f_err,
				f_err,
				__index = function()
					decode_error("unexpected termination")
				end,
			}
			setmetatable(dispatcher, dispatcher)

			--[[
		run decoder
	--]]
			local function decode(json_, pos_, nullv_, arraylen_)
				json, pos, nullv, arraylen = json_, pos_, nullv_, arraylen_
				rec_depth = 0

				pos = match(json, "^[ \n\r\t]*()", pos)

				f = dispatcher[byte(json, pos)]
				pos = pos + 1
				local v = f()

				if pos_ then
					return v, pos
				else
					f, pos = find(json, "^[ \n\r\t]*", pos)
					if pos ~= #json then
						decode_error("json ended")
					end
					return v
				end
			end

			return decode
		end

		return newdecoder
	end
end

do
	local _ENV = _ENV
	package.preload["lunajson.encoder"] = function(...)
		local arg = _G.arg
		local error = error
		local byte, find, format, gsub, match = string.byte, string.find, string.format, string.gsub, string.match
		local concat = table.concat
		local tostring = tostring
		local pairs, type = pairs, type
		local setmetatable = setmetatable
		local huge, tiny = 1 / 0, -1 / 0

		local f_string_esc_pat
		if _VERSION == "Lua 5.1" then
			-- use the cluttered pattern because lua 5.1 does not handle \0 in a pattern correctly
			f_string_esc_pat = "[^ -!#-[%]^-\255]"
		else
			f_string_esc_pat = '[\0-\31"\\]'
		end

		local _ENV = nil

		local function newencoder()
			local v, nullv
			local i, builder, visited

			local function f_tostring(v)
				builder[i] = tostring(v)
				i = i + 1
			end

			local radixmark = match(tostring(0.5), "[^0-9]")
			local delimmark = match(tostring(12345.12345), "[^0-9" .. radixmark .. "]")
			if radixmark == "." then
				radixmark = nil
			end

			local radixordelim
			if radixmark or delimmark then
				radixordelim = true
				if radixmark and find(radixmark, "%W") then
					radixmark = "%" .. radixmark
				end
				if delimmark and find(delimmark, "%W") then
					delimmark = "%" .. delimmark
				end
			end

			local f_number = function(n)
				if tiny < n and n < huge then
					local s = format("%.17g", n)
					if radixordelim then
						if delimmark then
							s = gsub(s, delimmark, "")
						end
						if radixmark then
							s = gsub(s, radixmark, ".")
						end
					end
					builder[i] = s
					i = i + 1
					return
				end
				error("invalid number")
			end

			local doencode

			local f_string_subst = {
				['"'] = '\\"',
				["\\"] = "\\\\",
				["\b"] = "\\b",
				["\f"] = "\\f",
				["\n"] = "\\n",
				["\r"] = "\\r",
				["\t"] = "\\t",
				__index = function(_, c)
					return format("\\u00%02X", byte(c))
				end,
			}
			setmetatable(f_string_subst, f_string_subst)

			local function f_string(s)
				builder[i] = '"'
				if find(s, f_string_esc_pat) then
					s = gsub(s, f_string_esc_pat, f_string_subst)
				end
				builder[i + 1] = s
				builder[i + 2] = '"'
				i = i + 3
			end

			local function f_table(o)
				if visited[o] then
					error("loop detected")
				end
				visited[o] = true

				local tmp = o[0]
				if type(tmp) == "number" then -- arraylen available
					builder[i] = "["
					i = i + 1
					for j = 1, tmp do
						doencode(o[j])
						builder[i] = ","
						i = i + 1
					end
					if tmp > 0 then
						i = i - 1
					end
					builder[i] = "]"
				else
					tmp = o[1]
					if tmp ~= nil then -- detected as array
						builder[i] = "["
						i = i + 1
						local j = 2
						repeat
							doencode(tmp)
							tmp = o[j]
							if tmp == nil then
								break
							end
							j = j + 1
							builder[i] = ","
							i = i + 1
						until false
						builder[i] = "]"
					else -- detected as object
						builder[i] = "{"
						i = i + 1
						local tmp = i
						for k, v in pairs(o) do
							if type(k) ~= "string" then
								error("non-string key")
							end
							f_string(k)
							builder[i] = ":"
							i = i + 1
							doencode(v)
							builder[i] = ","
							i = i + 1
						end
						if i > tmp then
							i = i - 1
						end
						builder[i] = "}"
					end
				end

				i = i + 1
				visited[o] = nil
			end

			local dispatcher = {
				boolean = f_tostring,
				number = f_number,
				string = f_string,
				table = f_table,
				__index = function()
					error("invalid type value")
				end,
			}
			setmetatable(dispatcher, dispatcher)

			function doencode(v)
				if v == nullv then
					builder[i] = "null"
					i = i + 1
					return
				end
				return dispatcher[type(v)](v)
			end

			local function encode(v_, nullv_)
				v, nullv = v_, nullv_
				i, builder, visited = 1, {}, {}

				doencode(v)
				return concat(builder)
			end

			return encode
		end

		return newencoder
	end
end

do
	local _ENV = _ENV
	package.preload["lunajson.sax"] = function(...)
		local arg = _G.arg
		local setmetatable, tonumber, tostring = setmetatable, tonumber, tostring
		local floor, inf = math.floor, math.huge
		local mininteger, tointeger = math.mininteger or nil, math.tointeger or nil
		local byte, char, find, gsub, match, sub =
			string.byte, string.char, string.find, string.gsub, string.match, string.sub

		local function _parse_error(pos, errmsg)
			error("parse error at " .. pos .. ": " .. errmsg, 2)
		end

		local f_str_ctrl_pat
		if _VERSION == "Lua 5.1" then
			-- use the cluttered pattern because lua 5.1 does not handle \0 in a pattern correctly
			f_str_ctrl_pat = "[^\32-\255]"
		else
			f_str_ctrl_pat = "[\0-\31]"
		end

		local type, unpack = type, table.unpack or unpack
		local open = io.open

		local _ENV = nil

		local function nop() end

		local function newparser(src, saxtbl)
			local json, jsonnxt, rec_depth
			local jsonlen, pos, acc = 0, 1, 0

			-- `f` is the temporary for dispatcher[c] and
			-- the dummy for the first return value of `find`
			local dispatcher, f

			-- initialize
			if type(src) == "string" then
				json = src
				jsonlen = #json
				jsonnxt = function()
					json = ""
					jsonlen = 0
					jsonnxt = nop
				end
			else
				jsonnxt = function()
					acc = acc + jsonlen
					pos = 1
					repeat
						json = src()
						if not json then
							json = ""
							jsonlen = 0
							jsonnxt = nop
							return
						end
						jsonlen = #json
					until jsonlen > 0
				end
				jsonnxt()
			end

			local sax_startobject = saxtbl.startobject or nop
			local sax_key = saxtbl.key or nop
			local sax_endobject = saxtbl.endobject or nop
			local sax_startarray = saxtbl.startarray or nop
			local sax_endarray = saxtbl.endarray or nop
			local sax_string = saxtbl.string or nop
			local sax_number = saxtbl.number or nop
			local sax_boolean = saxtbl.boolean or nop
			local sax_null = saxtbl.null or nop

			--[[
		Helper
	--]]
			local function tryc()
				local c = byte(json, pos)
				if not c then
					jsonnxt()
					c = byte(json, pos)
				end
				return c
			end

			local function parse_error(errmsg)
				return _parse_error(acc + pos, errmsg)
			end

			local function tellc()
				return tryc() or parse_error("unexpected termination")
			end

			local function spaces() -- skip spaces and prepare the next char
				while true do
					pos = match(json, "^[ \n\r\t]*()", pos)
					if pos <= jsonlen then
						return
					end
					if jsonlen == 0 then
						parse_error("unexpected termination")
					end
					jsonnxt()
				end
			end

			--[[
		Invalid
	--]]
			local function f_err()
				parse_error("invalid value")
			end

			--[[
		Constants
	--]]
			-- fallback slow constants parser
			local function generic_constant(target, targetlen, ret, sax_f)
				for i = 1, targetlen do
					local c = tellc()
					if byte(target, i) ~= c then
						parse_error("invalid char")
					end
					pos = pos + 1
				end
				return sax_f(ret)
			end

			-- null
			local function f_nul()
				if sub(json, pos, pos + 2) == "ull" then
					pos = pos + 3
					return sax_null(nil)
				end
				return generic_constant("ull", 3, nil, sax_null)
			end

			-- false
			local function f_fls()
				if sub(json, pos, pos + 3) == "alse" then
					pos = pos + 4
					return sax_boolean(false)
				end
				return generic_constant("alse", 4, false, sax_boolean)
			end

			-- true
			local function f_tru()
				if sub(json, pos, pos + 2) == "rue" then
					pos = pos + 3
					return sax_boolean(true)
				end
				return generic_constant("rue", 3, true, sax_boolean)
			end

			--[[
		Numbers
		Conceptually, the longest prefix that matches to `[-+.0-9A-Za-z]+` (in regexp)
		is captured as a number and its conformance to the JSON spec is checked.
	--]]
			-- deal with non-standard locales
			local radixmark = match(tostring(0.5), "[^0-9]")
			local fixedtonumber = tonumber
			if radixmark ~= "." then
				if find(radixmark, "%W") then
					radixmark = "%" .. radixmark
				end
				fixedtonumber = function(s)
					return tonumber(gsub(s, ".", radixmark))
				end
			end

			local function number_error()
				return parse_error("invalid number")
			end

			-- fallback slow parser
			local function generic_number(mns)
				local buf = {}
				local i = 1
				local is_int = true

				local c = byte(json, pos)
				pos = pos + 1

				local function nxt()
					buf[i] = c
					i = i + 1
					c = tryc()
					pos = pos + 1
				end

				if c == 0x30 then
					nxt()
					if c and 0x30 <= c and c < 0x3A then
						number_error()
					end
				else
					repeat
						nxt()
					until not (c and 0x30 <= c and c < 0x3A)
				end
				if c == 0x2E then
					is_int = false
					nxt()
					if not (c and 0x30 <= c and c < 0x3A) then
						number_error()
					end
					repeat
						nxt()
					until not (c and 0x30 <= c and c < 0x3A)
				end
				if c == 0x45 or c == 0x65 then
					is_int = false
					nxt()
					if c == 0x2B or c == 0x2D then
						nxt()
					end
					if not (c and 0x30 <= c and c < 0x3A) then
						number_error()
					end
					repeat
						nxt()
					until not (c and 0x30 <= c and c < 0x3A)
				end
				if
					c
					and (0x41 <= c and c <= 0x5B or 0x61 <= c and c <= 0x7B or c == 0x2B or c == 0x2D or c == 0x2E)
				then
					number_error()
				end
				pos = pos - 1

				local num = char(unpack(buf))
				num = fixedtonumber(num)
				if mns then
					num = -num
					if num == mininteger and is_int then
						num = mininteger
					end
				end
				return sax_number(num)
			end

			-- `0(\.[0-9]*)?([eE][+-]?[0-9]*)?`
			local function f_zro(mns)
				local num, c = match(json, "^(%.?[0-9]*)([-+.A-Za-z]?)", pos) -- skipping 0

				if num == "" then
					if pos > jsonlen then
						pos = pos - 1
						return generic_number(mns)
					end
					if c == "" then
						if mns then
							return sax_number(-0.0)
						end
						return sax_number(0)
					end

					if c == "e" or c == "E" then
						num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
						if c == "" then
							pos = pos + #num
							if pos > jsonlen then
								pos = pos - #num - 1
								return generic_number(mns)
							end
							if mns then
								return sax_number(-0.0)
							end
							return sax_number(0.0)
						end
					end
					pos = pos - 1
					return generic_number(mns)
				end

				if byte(num) ~= 0x2E or byte(num, -1) == 0x2E then
					pos = pos - 1
					return generic_number(mns)
				end

				if c ~= "" then
					if c == "e" or c == "E" then
						num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
					end
					if c ~= "" then
						pos = pos - 1
						return generic_number(mns)
					end
				end

				pos = pos + #num
				if pos > jsonlen then
					pos = pos - #num - 1
					return generic_number(mns)
				end
				c = fixedtonumber(num)

				if mns then
					c = -c
				end
				return sax_number(c)
			end

			-- `[1-9][0-9]*(\.[0-9]*)?([eE][+-]?[0-9]*)?`
			local function f_num(mns)
				pos = pos - 1
				local num, c = match(json, "^([0-9]+%.?[0-9]*)([-+.A-Za-z]?)", pos)
				if byte(num, -1) == 0x2E then -- error if ended with period
					return generic_number(mns)
				end

				if c ~= "" then
					if c ~= "e" and c ~= "E" then
						return generic_number(mns)
					end
					num, c = match(json, "^([^eE]*[eE][-+]?[0-9]+)([-+.A-Za-z]?)", pos)
					if not num or c ~= "" then
						return generic_number(mns)
					end
				end

				pos = pos + #num
				if pos > jsonlen then
					pos = pos - #num
					return generic_number(mns)
				end
				c = fixedtonumber(num)

				if mns then
					c = -c
					if c == mininteger and not find(num, "[^0-9]") then
						c = mininteger
					end
				end
				return sax_number(c)
			end

			-- skip minus sign
			local function f_mns()
				local c = byte(json, pos) or tellc()
				if c then
					pos = pos + 1
					if c > 0x30 then
						if c < 0x3A then
							return f_num(true)
						end
					else
						if c > 0x2F then
							return f_zro(true)
						end
					end
				end
				parse_error("invalid number")
			end

			--[[
		Strings
	--]]
			local f_str_hextbl = {
				0x0,
				0x1,
				0x2,
				0x3,
				0x4,
				0x5,
				0x6,
				0x7,
				0x8,
				0x9,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				0xA,
				0xB,
				0xC,
				0xD,
				0xE,
				0xF,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				inf,
				0xA,
				0xB,
				0xC,
				0xD,
				0xE,
				0xF,
				__index = function()
					return inf
				end,
			}
			setmetatable(f_str_hextbl, f_str_hextbl)

			local f_str_escapetbl = {
				['"'] = '"',
				["\\"] = "\\",
				["/"] = "/",
				["b"] = "\b",
				["f"] = "\f",
				["n"] = "\n",
				["r"] = "\r",
				["t"] = "\t",
				__index = function()
					parse_error("invalid escape sequence")
				end,
			}
			setmetatable(f_str_escapetbl, f_str_escapetbl)

			local function surrogate_first_error()
				return parse_error("1st surrogate pair byte not continued by 2nd")
			end

			local f_str_surrogate_prev = 0
			local function f_str_subst(ch, ucode)
				if ch == "u" then
					local c1, c2, c3, c4, rest = byte(ucode, 1, 5)
					ucode = f_str_hextbl[c1 - 47] * 0x1000
						+ f_str_hextbl[c2 - 47] * 0x100
						+ f_str_hextbl[c3 - 47] * 0x10
						+ f_str_hextbl[c4 - 47]
					if ucode ~= inf then
						if ucode < 0x80 then -- 1byte
							if rest then
								return char(ucode, rest)
							end
							return char(ucode)
						elseif ucode < 0x800 then -- 2bytes
							c1 = floor(ucode / 0x40)
							c2 = ucode - c1 * 0x40
							c1 = c1 + 0xC0
							c2 = c2 + 0x80
							if rest then
								return char(c1, c2, rest)
							end
							return char(c1, c2)
						elseif ucode < 0xD800 or 0xE000 <= ucode then -- 3bytes
							c1 = floor(ucode / 0x1000)
							ucode = ucode - c1 * 0x1000
							c2 = floor(ucode / 0x40)
							c3 = ucode - c2 * 0x40
							c1 = c1 + 0xE0
							c2 = c2 + 0x80
							c3 = c3 + 0x80
							if rest then
								return char(c1, c2, c3, rest)
							end
							return char(c1, c2, c3)
						elseif 0xD800 <= ucode and ucode < 0xDC00 then -- surrogate pair 1st
							if f_str_surrogate_prev == 0 then
								f_str_surrogate_prev = ucode
								if not rest then
									return ""
								end
								surrogate_first_error()
							end
							f_str_surrogate_prev = 0
							surrogate_first_error()
						else -- surrogate pair 2nd
							if f_str_surrogate_prev ~= 0 then
								ucode = 0x10000 + (f_str_surrogate_prev - 0xD800) * 0x400 + (ucode - 0xDC00)
								f_str_surrogate_prev = 0
								c1 = floor(ucode / 0x40000)
								ucode = ucode - c1 * 0x40000
								c2 = floor(ucode / 0x1000)
								ucode = ucode - c2 * 0x1000
								c3 = floor(ucode / 0x40)
								c4 = ucode - c3 * 0x40
								c1 = c1 + 0xF0
								c2 = c2 + 0x80
								c3 = c3 + 0x80
								c4 = c4 + 0x80
								if rest then
									return char(c1, c2, c3, c4, rest)
								end
								return char(c1, c2, c3, c4)
							end
							parse_error("2nd surrogate pair byte appeared without 1st")
						end
					end
					parse_error("invalid unicode codepoint literal")
				end
				if f_str_surrogate_prev ~= 0 then
					f_str_surrogate_prev = 0
					surrogate_first_error()
				end
				return f_str_escapetbl[ch] .. ucode
			end

			local function f_str(iskey)
				local pos2 = pos
				local newpos
				local str = ""
				local bs
				while true do
					while true do -- search '\' or '"'
						newpos = find(json, '[\\"]', pos2)
						if newpos then
							break
						end
						str = str .. sub(json, pos, jsonlen)
						if pos2 == jsonlen + 2 then
							pos2 = 2
						else
							pos2 = 1
						end
						jsonnxt()
						if jsonlen == 0 then
							parse_error("unterminated string")
						end
					end
					if byte(json, newpos) == 0x22 then -- break if '"'
						break
					end
					pos2 = newpos + 2 -- skip '\<char>'
					bs = true -- mark the existence of a backslash
				end
				str = str .. sub(json, pos, newpos - 1)
				pos = newpos + 1

				if find(str, f_str_ctrl_pat) then
					parse_error("unescaped control string")
				end
				if bs then -- a backslash exists
					-- We need to grab 4 characters after the escape char,
					-- for encoding unicode codepoint to UTF-8.
					-- As we need to ensure that every first surrogate pair byte is
					-- immediately followed by second one, we grab upto 5 characters and
					-- check the last for this purpose.
					str = gsub(str, "\\(.)([^\\]?[^\\]?[^\\]?[^\\]?[^\\]?)", f_str_subst)
					if f_str_surrogate_prev ~= 0 then
						f_str_surrogate_prev = 0
						parse_error("1st surrogate pair byte not continued by 2nd")
					end
				end

				if iskey then
					return sax_key(str)
				end
				return sax_string(str)
			end

			--[[
		Arrays, Objects
	--]]
			-- arrays
			local function f_ary()
				rec_depth = rec_depth + 1
				if rec_depth > 1000 then
					parse_error("too deeply nested json (> 1000)")
				end
				sax_startarray()

				spaces()
				if byte(json, pos) == 0x5D then -- check closing bracket ']' which means the array empty
					pos = pos + 1
				else
					local newpos
					while true do
						f = dispatcher[byte(json, pos)] -- parse value
						pos = pos + 1
						f()
						newpos = match(json, "^[ \n\r\t]*,[ \n\r\t]*()", pos) -- check comma
						if newpos then
							pos = newpos
						else
							newpos = match(json, "^[ \n\r\t]*%]()", pos) -- check closing bracket
							if newpos then
								pos = newpos
								break
							end
							spaces() -- since the current chunk can be ended, skip spaces toward following chunks
							local c = byte(json, pos)
							pos = pos + 1
							if c == 0x2C then -- check comma again
								spaces()
							elseif c == 0x5D then -- check closing bracket again
								break
							else
								parse_error("no closing bracket of an array")
							end
						end
						if pos > jsonlen then
							spaces()
						end
					end
				end

				rec_depth = rec_depth - 1
				return sax_endarray()
			end

			-- objects
			local function f_obj()
				rec_depth = rec_depth + 1
				if rec_depth > 1000 then
					parse_error("too deeply nested json (> 1000)")
				end
				sax_startobject()

				spaces()
				if byte(json, pos) == 0x7D then -- check closing bracket '}' which means the object empty
					pos = pos + 1
				else
					local newpos
					while true do
						if byte(json, pos) ~= 0x22 then
							parse_error("not key")
						end
						pos = pos + 1
						f_str(true) -- parse key
						newpos = match(json, "^[ \n\r\t]*:[ \n\r\t]*()", pos) -- check colon
						if newpos then
							pos = newpos
						else
							spaces() -- read spaces through chunks
							if byte(json, pos) ~= 0x3A then -- check colon again
								parse_error("no colon after a key")
							end
							pos = pos + 1
							spaces()
						end
						if pos > jsonlen then
							spaces()
						end
						f = dispatcher[byte(json, pos)]
						pos = pos + 1
						f() -- parse value
						newpos = match(json, "^[ \n\r\t]*,[ \n\r\t]*()", pos) -- check comma
						if newpos then
							pos = newpos
						else
							newpos = match(json, "^[ \n\r\t]*}()", pos) -- check closing bracket
							if newpos then
								pos = newpos
								break
							end
							spaces() -- read spaces through chunks
							local c = byte(json, pos)
							pos = pos + 1
							if c == 0x2C then -- check comma again
								spaces()
							elseif c == 0x7D then -- check closing bracket again
								break
							else
								parse_error("no closing bracket of an object")
							end
						end
						if pos > jsonlen then
							spaces()
						end
					end
				end

				rec_depth = rec_depth - 1
				return sax_endobject()
			end

			--[[
		The jump table to dispatch a parser for a value,
		indexed by the code of the value's first char.
		Key should be non-nil.
	--]]
			dispatcher = {
				[0] = f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_str,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_mns,
				f_err,
				f_err,
				f_zro,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_num,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_ary,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_fls,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_nul,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_tru,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_err,
				f_obj,
				f_err,
				f_err,
				f_err,
				f_err,
			}

			--[[
		public funcitons
	--]]
			local function run()
				rec_depth = 0
				spaces()
				f = dispatcher[byte(json, pos)]
				pos = pos + 1
				f()
			end

			local function read(n)
				if n < 0 then
					error("the argument must be non-negative")
				end
				local pos2 = (pos - 1) + n
				local str = sub(json, pos, pos2)
				while pos2 > jsonlen and jsonlen ~= 0 do
					jsonnxt()
					pos2 = pos2 - (jsonlen - (pos - 1))
					str = str .. sub(json, pos, pos2)
				end
				if jsonlen ~= 0 then
					pos = pos2 + 1
				end
				return str
			end

			local function tellpos()
				return acc + pos
			end

			return {
				run = run,
				tryc = tryc,
				read = read,
				tellpos = tellpos,
			}
		end

		local function newfileparser(fn, saxtbl)
			local fp = open(fn)
			local function gen()
				local s
				if fp then
					s = fp:read(8192)
					if not s then
						fp:close()
						fp = nil
					end
				end
				return s
			end
			return newparser(gen, saxtbl)
		end

		return {
			newparser = newparser,
			newfileparser = newfileparser,
		}
	end
end

do
	local _ENV = _ENV
	package.preload["utils"] = function(...)
		local arg = _G.arg
		local module = {}

		function module.tablelength(T)
			local count = 0
			for _ in pairs(T) do
				count = count + 1
			end
			return count
		end

		module.id_number = 0
		function module.next_id(length)
			module.id_number = module.id_number + 1
			return string.format(string.format("%%0%dd", length), module.id_number)
		end

		local function url_encode_char(chr)
			return string.format("%%%X", string.byte(chr))
		end

		function module.urlencode(str)
			local output, t = string.gsub(str, "[^%w]", url_encode_char)
			return output
		end

		function module.xmlescape(str)
			return string.gsub(str, "[<>&]", { ["&"] = "&amp;", ["<"] = "&lt;", [">"] = "&gt;" })
		end

		function module.xmlattr(str)
			return string.gsub(str, '["<>&]', { ["&"] = "&amp;", ["<"] = "&lt;", [">"] = "&gt;", ['"'] = "&quot;" })
		end

		function module.trim(s)
			return s:gsub("^%s*(.-)%s*$", "%1")
		end

		function module.deepcopy(orig)
			local orig_type = type(orig)
			local copy
			if orig_type == "table" then
				copy = {}
				for orig_key, orig_value in next, orig, nil do
					copy[module.deepcopy(orig_key)] = module.deepcopy(orig_value)
				end
				setmetatable(copy, module.deepcopy(getmetatable(orig)))
			else -- number, string, boolean, etc
				copy = orig
			end
			return copy
		end

		function module.dump(o)
			if type(o) == "table" then
				local s = "{ "
				for k, v in pairs(o) do
					if type(k) ~= "number" then
						k = '"' .. k .. '"'
					end
					s = s .. "[" .. k .. "] = " .. module.dump(v) .. ","
				end
				return s .. "} "
			else
				return tostring(o)
			end
		end

		function module.trim(s)
			if s == nil then
				return s
			end
			return (s:gsub("^%s*(.-)%s*$", "%1"))
		end

		return module
	end
end

do
	local _ENV = _ENV
	package.preload["zotero"] = function(...)
		local arg = _G.arg
		local module = {}

		local utils = require("utils")
		local json = require("lunajson")
		-- local pl = require('pl.pretty') -- for pl.pretty.dump

		local state = {
			reported = {},
		}

		module.citekeys = {}

		local function load_items()
			if state.fetched ~= nil then
				return
			end

			state.fetched = {
				items = {},
				errors = {},
			}

			local citekeys = {}
			for k, _ in pairs(module.citekeys) do
				table.insert(citekeys, k)
			end

			if utils.tablelength(citekeys) == 0 then
				return
			end

			module.request.params.citekeys = citekeys
			local url = module.url .. utils.urlencode(json.encode(module.request))
			local mt, body = pandoc.mediabag.fetch(url, ".")
			local ok, response = pcall(json.decode, body)
			if not ok then
				print("could not fetch Zotero items: " .. response .. "(" .. body .. ")")
				return
			end
			if response.error ~= nil then
				print("could not fetch Zotero items: " .. response.error.message)
				return
			end
			state.fetched = response.result
		end

		function module.get(citekey)
			load_items()

			if state.reported[citekey] ~= nil then
				return nil
			end

			if state.fetched.errors[citekey] ~= nil then
				state.reported[citekey] = true
				if state.fetched.errors[citekey] == 0 then
					print("@" .. citekey .. ": not found")
				else
					print("@" .. citekey .. ": duplicates found")
				end
				return nil
			end

			if state.fetched.items[citekey] == nil then
				state.reported[citekey] = true
				print("@" .. citekey .. " not in Zotero")
				return nil
			end

			return state.fetched.items[citekey]
		end

		return module
	end
end

--
-- bbt-to-live-doc
--
-- Copyright (c) 2020 Emiliano Heyns
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy of
-- this software and associated documentation files (the "Software"), to deal in
-- the Software without restriction, including without limitation the rights to
-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-- of the Software, and to permit persons to whom the Software is furnished to do
-- so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in all
-- copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-- SOFTWARE.
--

if lpeg == nil then
	print("upgrade pandoc to version 2.16.2 or later")
	os.exit()
end

local json = require("lunajson")
local csl_locator = require("locator")
local utils = require("utils")
local zotero = require("zotero")

-- -- global state -- --
local config = {
	client = "zotero",
	scannable_cite = false,
	csl_style = "apa",
	format = nil, -- more to document than anything else -- Lua does not store nils in tables
	transferable = false,
	sorted = true,
}

-- -- bibliography marker generator -- --
function zotero_docpreferences_odt(csl_style)
	return string.format(
		'<data data-version="3" zotero-version="5.0.89">'
			.. '   <session id="OGe1IYVe"/>'
			.. '   <style id="http://www.zotero.org/styles/%s" locale="en-US" hasBibliography="1" bibliographyStyleHasBeenSet="0"/>'
			.. "   <prefs>"
			.. '     <pref name="fieldType" value="ReferenceMark"/>'
			-- .. '     <pref name="delayCitationUpdates" value="true"/>'
			.. "   </prefs>"
			.. "</data>",
		csl_style
	)
end

local function zotero_bibl_odt_banner()
	if not (config.format == "odt" and config.csl_style and config.transferable) then
		error("zotero_bibl_odt_banner: This should not happen")
	end

	local banner = ""
		.. '<text:p text:style-name="Bibliography_20_1">'
		.. "ZOTERO_TRANSFER_DOCUMENT"
		.. "</text:p>"
		.. '<text:p text:style-name="Bibliography_20_1">'
		.. "The Zotero citations in this document have been converted to a format"
		.. "that can be safely transferred between word processors. Open this"
		.. "document in a supported word processor and press Refresh in the "
		.. config.client
		.. "plugin to continue working with the citations."
		.. "</text:p>"

	local doc_preferences = ""
		.. '<text:p text:style-name="Text_20_body">'
		.. '<text:a xlink:type="simple" xlink:href="https://www.zotero.org/" text:style-name="Internet_20_link">'
		.. "DOCUMENT_PREFERENCES "
		.. utils.xmlescape(zotero_docpreferences_odt(config.csl_style))
		.. "</text:a>"
		.. "</text:p>"

	return banner .. doc_preferences
end

local function zotero_bibl_odt()
	if config.format ~= "odt" or not config.csl_style then
		error("zotero_bibl_odt: This should not happen")
	end

	local message = "<Bibliography: Do " .. config.client .. " Refresh>"
	local bib_settings = '{"uncited":[],"omitted":[],"custom":[]}'

	if config.transferable then
		return '<text:p text:style-name="Text_20_body">'
			.. '<text:a xlink:type="simple" xlink:href="https://www.zotero.org/" text:style-name="Internet_20_link">'
			.. "BIBL "
			.. utils.xmlescape(bib_settings)
			.. " "
			.. "CSL_BIBLIOGRAPHY"
			.. "</text:a>"
			.. "</text:p>"
	end

	return string.format(
		'<text:section text:name=" %s">'
			.. '<text:p text:style-name="Bibliography_20_1">'
			.. utils.xmlescape(message)
			.. "</text:p>"
			.. "</text:section>",
		"ZOTERO_BIBL " .. utils.xmlattr(bib_settings) .. " CSL_BIBLIOGRAPHY" .. " RND" .. utils.next_id(10)
	)
end

-- -- -- citation marker generators -- -- --

function clean_csl(item)
	local cleaned = {}
	for k, v in pairs(item) do
		cleaned[k] = v
	end
	cleaned.custom = nil
	return setmetatable(cleaned, getmetatable(item))
end

local function zotero_ref(cite)
	local content = pandoc.utils.stringify(cite.content)
	local csl = {
		citationID = utils.next_id(8),
		properties = {
			unsorted = not config.sorted,
			formattedCitation = content,
			plainCitation = nil, -- otherwise we get a barrage of "you have edited this citation" popups
			-- dontUpdate = false,
			noteIndex = 0,
		},
		citationItems = {},
		schema = "https://github.com/citation-style-language/schema/raw/master/csl-citation.json",
	}
	local author_in_text = ""

	notfound = false
	for k, item in pairs(cite.citations) do
		local itemData = zotero.get(item.id)
		if itemData == nil then
			notfound = true
		else
			local citation = {
				id = itemData.custom.itemID,
				uris = { itemData.custom.uri },
				-- uri = { zoteroData.uri },
				itemData = clean_csl(itemData),
			}

			if item.mode == "AuthorInText" then -- not formally supported in Zotero
				if config.author_in_text then
					local authors = itemData.custom.author
					if authors == nil or authors == "" then
						return cite
					else
						author_in_text = pandoc.utils.stringify(pandoc.Str(authors)) .. " "
						author_in_text = '<w:r><w:t xml:space="preserve">'
							.. utils.xmlescape(author_in_text)
							.. "</w:t></w:r>"
						citation["suppress-author"] = true
					end
				else
					return cite
				end
			end

			if item.mode == "SuppressAuthor" then
				citation["suppress-author"] = true
			end
			citation.prefix = pandoc.utils.stringify(item.prefix):gsub("\194\160", " ")
			local label, locator, suffix = csl_locator.parse(pandoc.utils.stringify(item.suffix):gsub("\194\160", " "))
			if suffix and suffix ~= "" then
				citation.suffix = suffix
			end
			if label and label ~= "" then
				citation.label = label
			end
			if locator and locator ~= "" then
				citation.locator = locator
			end

			table.insert(csl.citationItems, citation)
		end
	end

	if notfound then
		return cite
	end

	local message = "<Do Zotero Refresh: " .. content .. ">"

	if config.format == "docx" then
		local field = author_in_text
			.. '<w:r><w:fldChar w:fldCharType="begin"/></w:r><w:r><w:instrText xml:space="preserve">'
		field = field .. " ADDIN ZOTERO_ITEM CSL_CITATION " .. utils.xmlescape(json.encode(csl)) .. "   "
		field = field
			.. '</w:instrText></w:r><w:r><w:fldChar w:fldCharType="separate"/></w:r><w:r><w:rPr><w:noProof/></w:rPr><w:t>'
		field = field .. utils.xmlescape(message)
		field = field .. '</w:t></w:r><w:r><w:fldChar w:fldCharType="end"/></w:r>'

		return pandoc.RawInline("openxml", field)
	else
		if config.transferable then
			local field = author_in_text
				.. '<text:a xlink:type="simple" xlink:href="https://www.zotero.org/" text:style-name="Internet_20_link">'
				.. "ITEM CSL_CITATION "
				.. utils.xmlescape(json.encode(csl))
				.. "</text:a>"
			return pandoc.RawInline("opendocument", field)
		end

		csl = "ZOTERO_ITEM CSL_CITATION " .. utils.xmlattr(json.encode(csl)) .. " RND" .. utils.next_id(10)
		local field = author_in_text .. '<text:reference-mark-start text:name="' .. csl .. '"/>'
		field = field .. utils.xmlescape(message)
		field = field .. '<text:reference-mark-end text:name="' .. csl .. '"/>'

		return pandoc.RawInline("opendocument", field)
	end
end

local function scannable_cite(cite)
	local citations = ""
	for k, item in pairs(cite.citations) do
		citation = zotero.get(item.id)
		if citation == nil then
			return cite
		end

		if item.mode == "AuthorInText" then -- not formally supported in Zotero
			if config.author_in_text then
				local authors = zotero.authors(citation)
				if authors == nil then
					return cite
				else
					return pandoc.Str(authors)
				end
			else
				return cite
			end
		end

		local suppress = (item.mode == "SuppressAuthor" and "-" or "")
		local s, e, ug, id, key
		s, e, key = string.find(citation.uri, "http://zotero.org/users/local/%w+/items/(%w+)")
		if key then
			ug = "users"
			id = "0"
		else
			s, e, ug, id, key = string.find(citation.uri, "http://zotero.org/(%w+)/(%w+)/items/(%w+)")
		end

		local shortlabel = {
			book = "bk.",
			chapter = "chap.",
			column = "col.",
			figure = "fig.",
			folio = "fol.",
			number = "no.",
			line = "l.",
			note = "n.",
			opus = "op.",
			page = "p.",
			paragraph = "para.",
			part = "pt.",
			section = "sec.",
			["sub verbo"] = "s.v.",
			verse = "v.",
			volume = "vol.",
		}
		local label, locator, suffix = csl_locator.parse(pandoc.utils.stringify(item.suffix))
		if label then
			locator = shortlabel[label] .. " " .. locator
		else
			locator = ""
		end

		citations = citations
			.. "{ "
			.. (pandoc.utils.stringify(item.prefix) or "")
			.. " | "
			.. suppress
			.. utils.trim(string.gsub(pandoc.utils.stringify(cite.content) or "", "[|{}]", ""))
			.. " | "
			.. locator
			.. " | "
			.. (suffix or "")
			.. " | "
			.. (ug == "groups" and "zg:" or "zu:")
			.. id
			.. ":"
			.. key
			.. " }"
	end

	return pandoc.Str(citations)
end

-- -- -- get config -- -- --
local function test_enum(k, v, values)
	for _, valid in ipairs(values) do
		if type(v) ~= type(valid) then
			error(k .. " expects an " .. type(valid) .. ", got an " .. type(v))
		end

		if v == valid then
			return v
		end
	end

	error(k .. " expects one of " .. table.concat(values, ", ") .. ", got " .. v)
end
local function test_boolean(k, v)
	if type(v) == "boolean" then
		return v
	elseif type(v) == "nil" then
		return false
	end
	return (test_enum(k, v, { "true", "false" }) == "true")
end

function Meta(meta)
	-- create meta.zotero if it does not exist
	if not meta.zotero then
	    -- ADDED FOR QUARTO 1.4 COMPATIBILITY
		meta.zotero = meta.zoterolive or {}
	end

	-- copy meta.zotero_<key>, which are likely command line params and take precedence, over to meta.zotero
	for k, v in pairs(meta) do
		local s, e, key = string.find(k, "^zotero[-_](.*)")
		if key then
			meta.zotero[key:gsub("_", "-")] = v
		end
	end

	-- normalize values
	for k, v in pairs(meta.zotero) do
		meta.zotero[k] = pandoc.utils.stringify(v)
	end

	config.scannable_cite = test_boolean("scannable-cite", meta.zotero["scannable-cite"])
	config.author_in_text = test_boolean("author-in-text", meta.zotero["author-in-text"])

	if meta.zotero["csl-style"] ~= nil then
		config.csl_style = pandoc.utils.stringify(meta.zotero["csl-style"])
		if config.csl_style == "apa7" then
			config.csl_style = "apa"
		end
	end

	config.transferable = test_boolean("transferable", meta.zotero["transferable"])

	-- refuse to create a transferable document, when csl style is not specified
	if config.transferable and not config.csl_style then
		error("Transferable documents need a CSL style")
	end
	if config.transferable and not config.scannable_cite then
		error("Scannable-cite documents are not transferable")
	end

	if type(meta.zotero.client) == "nil" then -- should never happen as the default is 'zotero'
		meta.zotero.client = "zotero"
	else
		test_enum("client", meta.zotero.client, { "zotero", "jurism" })
	end
	config.client = meta.zotero.client

	if config.client == "zotero" then
		zotero.url = "http://127.0.0.1:23119/better-bibtex/json-rpc?"
	elseif config.client == "jurism" then
		zotero.url = "http://127.0.0.1:24119/better-bibtex/json-rpc?"
	end

	zotero.request = {
		jsonrpc = "2.0",
		method = "item.pandoc_filter",
		params = {
			style = config.csl_style or "apa",
		},
	}
	if string.match(FORMAT, "odt") and config.scannable_cite then
		-- scannable-cite takes precedence over csl-style
		config.format = "scannable-cite"
		zotero.request.params.asCSL = false
	elseif string.match(FORMAT, "odt") or string.match(FORMAT, "docx") then
		config.format = FORMAT
		zotero.request.params.asCSL = true
	end

	if type(meta.zotero.library) ~= "nil" then
		zotero.request.params.libraryID = meta.zotero.library
	end

	if config.format == "odt" and config.csl_style then
		-- These will be added to the document metadata by pandoc automatically
		meta.ZOTERO_PREF_1 = zotero_docpreferences_odt(config.csl_style)
		meta.ZOTERO_PREF_2 = ""
	end

	return meta
end

-- -- -- replace citations -- -- --
function Cite_collect(cite)
	if not config.format then
		return nil
	end

	for _, item in pairs(cite.citations) do
		zotero.citekeys[item.id] = true
	end

	return nil
end

function Cite_replace(cite)
	if not config.format then
		return nil
	end

	if config.format == "scannable-cite" then
		return scannable_cite(cite)
	else
		return zotero_ref(cite)
	end
end

local refsDivSeen = false
function Div(div)
	if not div.attr or div.attr.identifier ~= "refs" then
		return nil
	end
	if config.format ~= "odt" or not config.csl_style then
		return nil
	end

	refsDivSeen = true
	return pandoc.RawBlock("opendocument", zotero_bibl_odt())
end

function Doc(doc)
	if config.format ~= "odt" then
		return nil
	end

	if config.transferable then
		table.insert(doc.blocks, 1, pandoc.RawBlock("opendocument", zotero_bibl_odt_banner()))
	end

	if config.csl_style and not refsDivSeen then
		table.insert(doc.blocks, pandoc.RawBlock("opendocument", zotero_bibl_odt()))
	end

	return pandoc.Pandoc(doc.blocks, doc.meta)
end

return {
	{ Meta = Meta },
	{ Cite = Cite_collect },
	{ Cite = Cite_replace },
	{ Div = Div },
	{ Doc = Doc },
}