#!/usr/bin/env bash

# get base dir regardless of execution location
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  [[ "$SOURCE" != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
SOURCE=$([[ "$SOURCE" = /* ]] && echo "$SOURCE" || echo "$PWD/${SOURCE#./}")
basedir=$(dirname "$SOURCE")

paperstash() {
    STASHED=$(git stash)
}

paperunstash() {
    if [[ "$STASHED" != "No local changes to save" ]] ; then
        git stash pop
    fi
}

case "$1" in
    "rbp" | "rebuild")
    (
        set -e
        cd "$basedir"
        scripts/rebuildPatches.sh "$basedir"
    )
    ;;
    "p" | "patch")
    (
        set -e
        cd "$basedir"
        scripts/build.sh "$basedir"
    )
    ;;
    "j" | "jar")
    (
        set -e
        cd "$basedir"
        scripts/build.sh "$basedir" "--jar"
    )
    ;;
    "make")
    (
        if [[ "$2" = "bacon" ]] ; then
            set -e
            cd "$basedir"
            scripts/build.sh "$basedir" "--jar"
        fi
    )
    ;;
    "r" | "root")
        cd "$basedir"
    ;;
    "a" | "api")
        cd "$basedir/Paper-API"
    ;;
    "s" | "server")
        cd "$basedir"
    ;;
    "e" | "edit")
        case "$2" in
            "s" | "server")
            export LAST_EDIT="$basedir/Paper-Server"
            cd "$basedir/Paper-Server"
            (
                set -e

                paperstash
                git rebase -i upstream/upstream
                paperunstash
            )
            ;;
            "a" | "api")
            export LAST_EDIT="$basedir/Paper-API"
            cd "$basedir/Paper-API"
            (
                set -e

                paperstash
                git rebase -i upstream/upstream
                paperunstash
            )
            ;;
            "c" | "continue")
            cd "$LAST_EDIT"
            unset LAST_EDIT
            (
                set -e

                git add .
                git commit --amend
                git rebase --continue

                cd "$basedir"
                scripts/rebuildPatches.sh "$basedir"
            )
            ;;
            *)
                echo "You must edit either the api or server."
            ;;
        esac
    ;;
    "setup")
        if [[ -f ~/.bashrc ]] ; then
            NAME="paper"
            if [[ ! -z "${2+x}" ]] ; then
                NAME="$2"
            fi
            (grep "alias $NAME=" ~/.bashrc > /dev/null) && (sed -i "s|alias $NAME=.*|alias $NAME='. $SOURCE'|g" ~/.bashrc) || (echo "alias $NAME='. $SOURCE'" >> ~/.bashrc)
            alias "$NAME=. $SOURCE"
            echo "You can now just type '$NAME' at any time to access the paper tool."
        fi
    ;;
    *)
        echo "PaperMC build tool command. This provides a variety of commands to build and manage the PaperMC build"
        echo "environment. For all of the functionality of this command to be available, you must first run the"
        echo "'setup' command. View below for details. For essential building and patching, you do not need to do the setup."
        echo ""
        echo " Normal commands:"
        echo "  * rbp, rebuild | Rebuild patches, can be called from anywhere."
        echo "  * p, patch     | Apply all patches to the project without building it. Can be run from anywhere."
        echo "  * j, jar       | Apply all patches and build the project, paperclip.jar will be output. Can be run from anywhere."
        echo ""
        echo " These commands require the setup command before use:"
        echo "  * r, root      | Change directory to the root of the project."
        echo "  * a. api       | Move to the Paper-API directory."
        echo "  * s, server    | Move to the Paper-Server directory."
        echo "  * e, edit      | Use to edit a specific patch, give it the argument \"server\" or \"api\""
        echo "                 | respectively to edit the correct project. Use the argument \"continue\" after"
        echo "                 | the changes have been made to finish and rebuild patches. Can be called from anywhere."
        echo ""
        echo "  * setup        | Add an alias to .bashrc to allow full functionality of this script. Run as:"
        echo "                 |     . ./paper setup"
        echo "                 | After you run this command you'll be able to just run 'paper' from anywhere."
        echo "                 | The default name for the resulting alias is 'paper', you can give an argument to override"
        echo "                 | this default, such as:"
        echo "                 |     . ./paper setup example"
        echo "                 | Which will allow you to run 'example' instead."
    ;;
esac

unset -f paperstash
unset -f paperunstash