#!/usr/bin/env bash
set -euo pipefail

# Prerequisite:
# 1. presumably Void Linux
# 2. install xtools, perl (base-devel)
# 3. set XBPS_DISTDIR to your local copy of void-packages

# VERSION="3.2.2"

# List available updates of void packages installed locally for a specific contributor
# Usage: outdated_who email author
outdated_who(){
    # local EXCLUDE_REGEX="apache-"
    local email="$1"
    local author="$2"

    # URL encode email
    local encoded_email
    # encoded_email=$(echo -n "$email" | jq -sRr @uri)
    encoded_email=$(echo -n "$email" | perl -MURI::Escape -ne 'print uri_escape($_)')
    # encoded_email=$(echo -n "$email" | python3 -c "import sys, urllib.parse; print(urllib.parse.quote(sys.stdin.read()))")
    local DISTURL="https://repo-default.voidlinux.org/void-updates/void-updates/updates_${encoded_email}.txt"
    local DISTFILE="updates_${author}.txt"

    CONNECTION_TIMEOUT=5000 xbps-fetch -o "${DISTFILE}" "${DISTURL}"
    # wcurl --curl-options="--progress-bar" --output "${DISTFILE}" "${DISTURL}"
    # wget --hsts-file="$XDG_CACHE_HOME/wget-hsts" --output-document "${DISTFILE}" --quiet "${DISTURL}"

    # filter out uninterested packages
    # opinionated, `lib` could be a bit overkill
    # TODO: pass regex as variable to grep
    grep -vE 'apache-|avr-|brltty|cargo-|cinnamon|dkms|gnome-|gst-|jenkins|lib|linux|nemo-|pantheon-|perl-|ruby-|R-cran-|webkit2gtk' "${DISTFILE}" | sponge "${DISTFILE}"

    # dedup, leave only the highest available version
    # side effect: order is slightly different
    awk '!seen[$1]++ {line[$1] = $0} {line[$1] = $0} END {for (pkg in line) print line[pkg]}'  "${DISTFILE}" | sort | sponge "${DISTFILE}"

    # dedup again, leave only installed packages
    awk 'NR==FNR{installed[$1]; next} $1 in installed' installed.txt "${DISTFILE}" | sort | sponge "${DISTFILE}"
}

# List my outdated packages w/o xcheckmypkgs
# only work in local void-packages copy if XBPS_DISTDIR is not set
outdated_mypkg(){
    local MYURL
    XDISTDIR="$(xdistdir)" || exit 1
    MYURL="https://repo-default.voidlinux.org/void-updates/void-updates/updates_$(git -C "${XDISTDIR}" config user.email | sed 's/@/%40/').txt"
    local MYFILE="updates_me.txt"

    CONNECTION_TIMEOUT=5000 xbps-fetch -o "${MYFILE}" "${MYURL}"
}

LOG_FILE="updates_nover.txt"
# List packages that have error checking updates
outdated_error(){
    local LOG_URL="https://repo-default.voidlinux.org/void-updates/void-updates/_log.txt"

    CONNECTION_TIMEOUT=5000 xbps-fetch -o "${LOG_FILE}" "${LOG_URL}"

    # leave only (manually) installed packages
    grep -v 'No such file' < ${LOG_FILE} | awk 'BEGIN {
        while ((getline < "installed.txt") > 0) {
            installed[$1]
        }
    }
    {
        package = $5;
        if (package in installed) print $0
    }' | sponge ${LOG_FILE}
}

# strip updated packages
# TODO: add version comparison logic/walk through commit history to wisely include when newer updates are available
strip_updated(){
    # local UPDATED_PKGS=(colord-gtk lvm2 python3-usb)

    echo "Stripping..."
    # NOTE: assume you follow "$PKG-update" scheme in branch names (and "$PKG" is indeed latest)
    git branch | grep "update" | sed 's/-update//g' | awk '{ print $1 }' > branches.txt

    shopt -s nullglob
    for file in updates_*.txt
    do
        # skip no ver
        if [[ "${file}" == "${LOG_FILE}" ]] ; then
            true
        else
            # strip updated packages in branches with mixed commits
            grep -vE "colord-gtk|lvm2|python3-usb" "${file}" | sponge "${file}"
            # strip updated branch
            awk 'NR==FNR{branches[$1]; next} {for (b in branches) if ($1 ~ b) next} {print}' branches.txt "${file}" | sponge "${file}"
        fi
    done

    rm branches.txt
}

cd "$XBPS_DISTDIR" || exit 1

# list only manually installed packages
xpkg -m > installed.txt
# query all installed packages (including core packages, more complete, but MUCH slower)
# xbps-query -l | awk '{ print $2 }' | xargs -n1 xbps-uhelper getpkgname > installed.txt

# functions here
outdated_who "orphan@voidlinux.org" "orphan"
outdated_mypkg
outdated_error
strip_updated

# garbage clean
rm installed.txt