#!/bin/bash

set -eo >/dev/null

CURRENT_APPIMAGEKIT_RELEASE=9
ARCH="$(uname -m)"

if [[ $# -lt 1 ]]; then
        echo "Usage: $0 <version>"
        exit 0
fi

VERSION="$1"
LOVEFILE="$2"

LOVE_TAR_URL=https://bitbucket.org/rude/love/downloads/love-${VERSION}-linux-${ARCH}.tar.gz
LOVE_TAR=${HOME}/.cache/love-release/love/love-${VERSION}-${ARCH}.tar.gz
if ! test -f ${LOVE_TAR}; then
        echo "No tarball found for $VERSION in $LOVE_TAR"
        exit 1
fi

download_if_needed() {
        if ! test -f "$1"; then
                if ! curl -L -o "$1" "https://github.com/AppImage/AppImageKit/releases/download/${CURRENT_APPIMAGEKIT_RELEASE}/$1"; then
                        echo "Failed to download appimagetool"
                        echo "Please supply it manually"
                        exit 1
                fi
                chmod +x "$1"
        fi
}

main() {
        download_if_needed appimagetool-${ARCH}.AppImage
        download_if_needed AppRun-${ARCH}

        # Extract the tarball build into a folder
        rm -rf love-prepared
        mkdir love-prepared
        tar xf ${LOVE_TAR} -C love-prepared --strip-components=1

        cd love-prepared

        # Add our small wrapper script (yay, more wrappers), and AppRun
        cp ../wrapper usr/bin/wrapper-love
        cp ../AppRun-${ARCH} AppRun

        local desktopfile="love.desktop"
        local icon="love"
        local target="love-${VERSION}"

        if test -f ../../game.desktop.in; then
                desktopfile="game.desktop"
                cp ../../game.desktop.in .
        fi
        if test -f ../../game.svg; then
                icon="game"
                cp ../../game.svg .
        fi
        if test -f ${LOVEFILE}; then
                target="game"
                cat usr/bin/love ${LOVEFILE} > usr/bin/love-fused
                mv usr/bin/love-fused usr/bin/love
                chmod +x usr/bin/love
    else
                echo "Love file ${LOVEFILE} not found"
        fi

        # Add our desktop file
        sed -e 's/%BINARY%/wrapper-love/' -e "s/%ICON%/${icon}/" "${desktopfile}.in" > "$desktopfile"
        rm "${desktopfile}.in"

        # Add a DirIcon
        cp "${icon}.svg" .DirIcon

        # Clean up
        if test -f ../../game.desktop.in; then
                rm love.desktop.in
        fi
        if test -f ../../game.svg; then
                rm love.svg
        fi

        # Now build the final AppImage
        cd ..

        # Work around missing FUSE/docker
        ./appimagetool-${ARCH}.AppImage --appimage-extract
        ./squashfs-root/AppRun -n love-prepared "${target}-${ARCH}.AppImage"
}

main "$@"