#!/usr/bin/env bash

#
# Best effort script to check whenever a plugin pinned by commit has updates.
# plugins.lua must be formatted with stylua before running the script.
#
# Add flag --update to replace the commit id by the latest one
#
#

PLUGINS_DIR="$HOME/.local/share/nvim/site/pack/packer/start"
CONF_DIR="$HOME/.config/nvim/lua/core/"
has_updates=false

function check_update() {
    local plugin=$1
    local current_commit=$2
    local update=${3:-"false"}
    local last_commit
    local remote_url

    pushd "$PLUGINS_DIR/$plugin" > /dev/null || exit
    last_commit=$(git log -n 1 --pretty=format:"%H" origin/HEAD)
    remote_url=$(git config --get remote.origin.url)
    if [[ "$current_commit" != "$last_commit" ]]; then
        echo -e "Plugin $plugin has a new version $last_commit (the current version is $current_commit)\n\tURL: $remote_url"
        git log "${current_commit}"..origin/HEAD --pretty='format:%x09%h - %s (%cr) <%an>' --no-merges

        if [[ $update == "--update" ]]; then
            sed -i "s/$current_commit/$last_commit/" "$CONF_DIR/plugins.lua"
        fi

        has_updates=true
    fi

    popd > /dev/null || exit
}

update=${1:-"false"}
pushd "$CONF_DIR" > /dev/null || exit

grep -P "^\t*use.*commit" plugins.lua  | cut -f 2,4 -d "\"" | while IFS= read -r line; do
    plugin=$(echo "$line" | cut -f1 -d "\"" | cut -f2 -d "/")
    current_commit=$(echo "$line" | cut -f2 -d "\"")
    check_update "$plugin" "$current_commit" "$update"
done

grep -P "^\t*commit" plugins.lua  | cut -f2 -d "\"" | while IFS= read -r current_commit; do
    plugin=$(grep "$current_commit" -B1 plugins.lua | grep -v "$current_commit" | cut -f2 -d "\"" | cut -f2 -d "/")
    check_update "$plugin" "$current_commit" "$update"
done

grep -P "^\t*requires.*commit" plugins.lua | cut -f 2,4 -d "\"" | while IFS= read -r line; do
    plugin=$(echo "$line" | cut -f1 -d "\"" | cut -f2 -d "/")
    current_commit=$(echo "$line" | cut -f2 -d "\"")
    check_update "$plugin" "$current_commit" "$update"
done

if [ "$has_updates" == "false" ]; then
    echo "Everything is up to date"
fi

popd > /dev/null || exit