#!/bin/bash

output=/dev/stdout

# displays help text
function displayHelp() {
	cat <<HelpText
Usage: compile.sh [OPTION]...

Options:
  -d, --dry      Do not compile
  -g, --git      Add hash of HEAD to filename
  -h, --help     Show this help text
  -s, --sanity   Run sanityCheck
  -q, --quiet    Suppress terminal output
  -t, --themes   Generate theme files
HelpText
}

#display an error message
function echoError() {
	echo -e "\033[0;31m$*\033[0m"
}

#display message
function echoMessage() {
	echo "$1" >"${output}"
}

#compile the HTML file
function compile() {
	mkdir -p bin/resources
	export TWEEGO_PATH=devTools/tweeGo/storyFormats
	TWEEGO_EXE="tweego"

	if hash $TWEEGO_EXE 2>/dev/null; then
		echoMessage "system tweego binary"
	else
		case "$(uname -m)" in
			x86_64 | amd64)
				echoMessage "x64 arch"
				if [ "$(uname -s)" = "Darwin" ]; then
					TWEEGO_EXE="./devTools/tweeGo/tweego_osx64"
				elif [ "$OSTYPE" = "msys" ]; then
					TWEEGO_EXE="./devTools/tweeGo/tweego_win64"
				else
					TWEEGO_EXE="./devTools/tweeGo/tweego_nix64"
				fi
				;;
			x86 | i[3-6]86)
				echoMessage "x86 arch"
				if [ "$(uname -s)" = "Darwin" ]; then
					TWEEGO_EXE="./devTools/tweeGo/tweego_osx86"
				elif [ "$OSTYPE" = "msys" ]; then
					TWEEGO_EXE="./devTools/tweeGo/tweego_win86"
				else
					TWEEGO_EXE="./devTools/tweeGo/tweego_nix86"
				fi
				;;
			*)
				echoError "No system tweego binary found, and no precompiled binary for your platform available."
				echoError "Please compile tweego and put the executable in PATH."
				exit 2
				;;
		esac
	fi

	file="bin/FC_pregmod.html"
	if [[ -d .git ]]; then
		COMMIT=$(git rev-parse --short HEAD) # Find and insert current commit
		printf "App.Version.commitHash = '%s';\n" ${COMMIT} > src/002-config/fc-version.js.commitHash.js
		if [[ "$usehash" ]]; then
			file="bin/FC_pregmod_${COMMIT}.html"
		fi
	fi

	devTools/concatFiles.sh js/ '*.js' bin/fc.js
	$TWEEGO_EXE -o $file --module=bin/fc.js --head devTools/head.html src/ || build_failed="true"
	rm -f bin/fc.js
	if [ "$build_failed" = "true" ]; then
		echoError "Build failed."
		exit 1
	fi

	if [[ -d .git ]]; then
		rm src/002-config/fc-version.js.commitHash.js
	fi
	echoMessage "Saved to $file."
}

if [[ "$1" == "" ]]; then
	#tip if no option
	echoMessage "For more options see compile.sh -h."
else
	#parse options
	while [[ "$1" ]]; do
		case $1 in
			-d | --dry)
				dry="true"
				;;
			-g | --git)
				usehash="true"
				;;
			-h | --help)
				displayHelp
				exit 0
				;;
			-s | --sanity)
				sanity="true"
				;;
			-q | --quiet)
				output=/dev/null
				;;
	    -t | --themes)
	      themes="true"
	      ;;
			*)
				echoError "Unknown argument $1."
				displayHelp
				exit 1
				;;
		esac
		shift
	done
fi

# Run sanity check.
[ -n "$sanity" ] && ./sanityCheck.sh

if ! [[ -d .git ]]; then
	echoMessage "No git repository. Git specific actions disabled."
fi

#compile
if [[ "$dry" ]]; then
	echoMessage "Dry run finished."
else
	compile
	echoMessage "Compilation finished."
fi

# compile themes
if [[ "$themes" ]]; then
  (
	  cd themes/ || exit
    for D in *; do
      if [ -d "${D}" ]; then
        ../devTools/concatFiles.sh "${D}"/ '*.css' ../bin/"${D}".css
      fi
    done
  )
  echoMessage "Themes compiled"
fi