local action = require 'zettelkasten.action'

before_each(function()
    _G.vim = {g = {}, b = {}, loop = {fs_scandir = function() end}}
end)
after_each(function() _G.vim = nil end)

describe("open", function()
    it("should open file in editor if it contains a valid link ref", function()
        vim.api = {nvim_command = mock(function() end)}

        action.open({ref = "1910271456_link-to-my-file.md"})
        assert.spy(vim.api.nvim_command).was_called_with(
            "edit 1910271456_link-to-my-file.md")
    end)
    it("should do nothing when no link passed in", function()
        vim.fn = {expand = function() end}
        assert.is_not_error(action.open)
    end)
    it("should use the anchor to open the corresponding zettel", function()
        vim.api = {nvim_command = mock(function() end)}
        local ls = stub(require 'zettelkasten.files', "get_zettel")

        action.open({
            ref = "1910271456_link-to-my-file.md",
            anchor = "1910271456"
        })
        assert.stub(ls).was_called_with("1910271456")
    end)
end)

describe("open_selected", function()
    before_each(function()
        vim.api = {
            nvim_command = mock(function() end),
            nvim_get_current_line = function(sure)
                return
                    "Hello, this is a line and [mylink](1910271456_link-to-my-file.md) whereas another [link](2030101158 another-link-now.md)"
            end,
            nvim_win_get_cursor = function(winnum) return {0, 0} end
        }
    end)
    describe("when looking under cursor", function()
        it("should open link", function()
            vim.g['zettel_link_following'] = 'cursor'
            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 30} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_called_with(
                "edit 1910271456_link-to-my-file.md")
        end)
        it("should detect correct position for link start", function()
            vim.g['zettel_link_following'] = 'cursor'

            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 25} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_not_called()

            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 26} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_called_with(
                "edit 1910271456_link-to-my-file.md")
        end)
        it("should detect correct position for link end", function()
            vim.g['zettel_link_following'] = 'cursor'

            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 65} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_not_called()

            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 64} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_called_with(
                "edit 1910271456_link-to-my-file.md")
        end)
    end)
    describe("when looking until end of line", function()
        it("should use the style passed to it, above the one set in options",
           function()
            vim.g['zettel_link_following'] = 'cursor'

            vim.api.nvim_get_current_line = mock(vim.api.nvim_get_current_line)
            action.open_selected("line")

            assert.spy(vim.api.nvim_get_current_line).was_called()
        end)
        it("should open next link on line if option set", function()
            vim.g['zettel_link_following'] = 'line'
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_called_with(
                "edit 1910271456_link-to-my-file.md")
        end)
        it("should ignore links before cursor position", function()
            vim.g['zettel_link_following'] = 'line'
            vim.api.nvim_win_get_cursor =
                function(winnum) return {0, 65} end
            action.open_selected()
            assert.spy(vim.api.nvim_command).was_called_with(
                "edit 2030101158 another-link-now.md")
        end)
    end)
end)