#!/usr/bin/env bash
BOOTSTRAP_DIR=~/.dotfiles/bootstrap
OUTPUT=${BOOTSTRAP_DIR}/packages.tsv

pkg_all=$(pacman -Qqett | grep -v "$(pacman -Qqg base-devel)")

pkg_repo=$(pacman -Qqn)
pkg_aur=$(pacman -Qqm)

# tsv file:
# packagename, description, source, target
# toot  a toot manager  A   D

if [ -f "${OUTPUT}_TEMP" ]; then
    rm "${OUTPUT}_TEMP"
fi
touch "${OUTPUT}_TEMP"

# create new package list
for pkg in $pkg_all; do

    source=""
    if $(echo "$pkg_repo" | grep -F -q -x "$pkg"); then
        source="R"
    elif $(echo "$pkg_aur" | grep -F -q -x "$pkg"); then
        source="A"
    else
        echo "ERROR: The package $pkg could not be found in repositories or AUR."
        exit 1
    fi

    desc=$(pacman -Qs "$pkg" | grep -A1 --color "local/$pkg\s" | tail -n1)
    #remove leading whitespace
    desc="${desc#"${desc%%[![:space:]]*}"}"

    target=""
    if [ -f "$OUTPUT" ]; then
        found_line=$(grep -e "^$pkg" "$OUTPUT")
    fi
    if [ -n "$found_line" ]; then
        target=$(echo "$found_line" | cut -f4)
        printf "Updating pkg: %s:%s from: %s, for: %s\n" "$pkg" "$desc" "$source" "$target"
    else
        printf "Adding pkg: %s:%s from: %s, for: %s\n" "$pkg" "$desc" "$source" "$target"
    fi

    printf "%s\t%s\t%s\t%s\n" "$pkg" "$desc" "$source" "$target" >>"${OUTPUT}_TEMP"
done

# notify on any removed packages
if [ -f "$OUTPUT" ]; then
    while read -r line; do
        if ! echo "$line" | cut -f1 | xargs -I _ grep -F -q -x _ <(echo "$pkg_all"); then
            printf "REMOVED: %s" "$line"
        fi
    done <<<$(tail +2 "$OUTPUT")
fi

# actually write to file
cat <(printf "Name\tDescription\tSource\tTarget\n") "${OUTPUT}_TEMP" >"$OUTPUT"
rm "${OUTPUT}_TEMP"