#!/usr/bin/env bash

[[ $# -eq 0 ]] && echo "no subcommand given, sorry :(" && exit 1

WORKDIR="$(dirname "$(realpath "$0")")/../repo"
PWD=`pwd`

RESOURCE_TO_TRACK=""
[[ $1 = "track" && $# -eq 2 ]] && RESOURCE_TO_TRACK="$(realpath "$2")"

cd $WORKDIR

case $1 in
	"commit")
		shift
		MESSAGE="$*"
		[[ "$MESSAGE" = "" ]] && MESSAGE="c.sh commit from $HOSTNAME"
		git add --all
		git commit -m "$MESSAGE"
		;;

	"track")
		if [[ $# -ne 2 ]]; then
			echo "no file or folder given"
			exit 1
		fi

		# Check if there is a .git folder. If so, we need to temporary
		# rename it, so we can track the file/folder.
		GIT_DIR=
		TRAVERSAL_PATH="$RESOURCE_TO_TRACK"
		while [[ "$TRAVERSAL_PATH" != "/" ]]; do
			if [[ -d "$TRAVERSAL_PATH/.git" ]]; then
				GIT_DIR="$TRAVERSAL_PATH/.git"
				break
			fi
			TRAVERSAL_PATH="$(dirname $TRAVERSAL_PATH)"
		done

		[[ "$GIT_DIR" != "" ]] && mv "$GIT_DIR" "$GIT_DIR.keep"
		git add -v -f "$RESOURCE_TO_TRACK"
		[[ "$GIT_DIR" != "" ]] && mv "$GIT_DIR.keep" "$GIT_DIR"
		;;

	"diff")
		git status -s
		git diff -p
		;;

	"revert")
		echo "Not implemented"
		;;

	"log")
		echo "Last changes:"
		git log --pretty=format:'  * %cr: %s' | head -3
		;;

	*)
		echo "commit (save snapshot of the current state)"
		echo "track  (add a file or folder to git)"
		echo "diff   (show unpushed changes)"
        echo "log    (show last commits)"
		;;
esac