#!/bin/bash

function is_git {

		# check if current folder is git repository
		git_check_command=$(git -C $1 rev-parse > /dev/null 2>&1)
	if [[ $? != 0  ]]; then
			return 0
	fi

	return 1
}

function get_current_branch {
	echo $(git branch | grep "*" | awk '{print $NF}')
}

function git_auto_save {
		
	if [[ $(is_git ".") -ne 0 ]]; then
			echo "Current dir is not a git repository."
			return 1
	fi

	current_branch_name=$(get_current_branch)

	timestamp=`date +%Y_%m_%d_%H_%M_%S`
	new_branch_name="git_auto_save/$HOST/$timestamp"
	
	# check if there is unsaved work
	changes=`git status --ignore-submodules=dirty | grep -E 'modified|deleted|new'`
	if [[ ! $changes ]]; then
			echo "No changes found."
			return
	fi

	# stash changes
	git stash

	# create new branch
	git checkout -b $new_branch_name
	git push origin $new_branch_name

	# apply stashed changes
	git stash apply

	# add changed files
	git add -u

	# commit changes
	git commit -m "git autosave from $timestamp"

	# push changes
	git push --set-upstream origin $new_branch_name

	# move back to initial branch
	git checkout $current_branch_name
	
}

function remove_auto_save {

	if [[ $(is_git ".") -ne 0 ]]; then
			echo "Current dir is not a git repository."
			return 1
	fi
	
	if [[ $1 ]]; then
		auto_save_branch=$1
	else
		auto_save_branch=`git branch | grep "git_auto_save" | head -1 | awk '{print $FN}'`
	fi

	if [[ ! $auto_save_branch ]]; then
			echo "No auto-save branch found."
			return 1
	fi

	auto_save_branch=${auto_save_branch:2}
	current_branch=$(get_current_branch)

	# if on autosave branch, move to master
	if [[ $current_branch == $auto_save_branch ]]; then
			echo "Currently on autosave path, moving to Master"
			git checkout master
	fi

	# remove local branch
	git branch -d $auto_save_branch

	# remove remote branch
	git push origin --delete $auto_save_branch

	return 0

}

function remove_all_auto_saves {

	if [[ $(is_git ".") -ne 0 ]]; then
		echo "Current dir is not a git repository."
		return 1
	fi

	if [[ $1 != "y" ]]; then
			echo "Please confirm with 'y'"
			return	
	fi

	# remove all auto save branches
	while [[ 1 ]]; do
		if ! remove_auto_save; then
			break
		fi
		echo "Auto-Save removed."
	done

	echo "All auto-saves removed."
		
}

function load_last_auto_save {
	echo ""
}