#!/usr/bin/env bash

set -o errexit
set -o nounset

IMAGE=gamedl
CONTAINER=$IMAGE

function build_image () {
	echo "building $IMAGE..."
	# docker build --tag "$IMAGE" .

	docker build --tag "$IMAGE" - << EOF
FROM python:3-alpine
RUN apk add --no-cache git
RUN pip install itchiodl
WORKDIR /usr/src/humble-dl
RUN \
        git clone 'https://github.com/xtream1101/humblebundle-downloader.git' . &&\
        wget -O trovefix.patch 'https://patch-diff.githubusercontent.com/raw/xtream1101/humblebundle-downloader/pull/59.patch' &&\
        git apply trovefix.patch &&\
        pip install -e .
CMD echo "Usage: gamedl <hbd|itch-download|help|build> [<options>]"
EOF
}

function check_image () {
	if ! (docker image inspect "$IMAGE" >/dev/null); then
		echo "cannot access docker image $IMAGE, it probably does not exist."
		
		while true; do
			read -p "build image? [yn] " yn
			case $yn in
				[Yy]* ) build_image; exit ;;
				[Nn]* ) echo "bye"; exit ;;
				* )     echo "Please answer yes or no." ;;
			esac
		done
	fi
}

function run_image () {
	echo "mounting your local working dir as /dl"
	docker run -u $(id -u):$(id -g) -v $PWD:/dl -it --rm --name "$CONTAINER" "$IMAGE" "$@"
}

function show_help () {
	echo "Usage $0 <command> [<options>]
Commands:
	hbd
		Run the Humble downloader.
	itch-download
		Run the Itch.io downloader.

	build
		(Re)build the gamedl-image.
	help
		That is what you are reading now.
"
}

cmd="help"
if [ $# -ge 1 ]; then
	cmd="$1"
fi

case "$cmd" in
	help | h | -h )
		show_help; exit ;;
	build )
		build_image; exit ;;
	* )
		run_image $@; exit ;;
esac