#!/bin/bash

set -e

export SOURCE_DATE_EPOCH=1700000000

usage() {
    echo "Usage: $(basename "$0")  [-h] [-a <x64|armv7l|arm64|all> default=x64]"
    echo
    echo " Options:"
    echo " -a    Architecture to build for (<x64|armv7l|arm64|all> default=x64)"
    echo " -h    Show this help and exit"
}

prepare_tarball(){
    arch=${1}
    echo "Preparing tarball for ${arch}"
    if [ ! -f "tar/yandex-music_${version}_${arch}.tar.gz" ]; then
        echo "Building tarball for ${arch}"
        bash build_tarball.sh -a "${arch}"
    fi
    cp "tar/yandex-music_${version}_${arch}.tar.gz" "${TEMPDIR}/yandex-music_${version}_${arch}.tar.gz"
}

build_deb(){
    arch=${1}
    pkgarch=${2}

    echo "Building ${arch} package"
    pkgdir="${TEMPDIR}/yandex-music-${arch}"

    mkdir -p "${pkgdir}/DEBIAN"
    cp "./templates/control" "${pkgdir}/DEBIAN/control"
    sed -i "s/%version%/${version}/g" "${pkgdir}/DEBIAN/control"
    sed -i "s/%arch%/${pkgarch}/g" "${pkgdir}/DEBIAN/control"

    # extract tarball to pkgdir
    tar -xzf "${TEMPDIR}/yandex-music_${version}_${arch}.tar.gz" -C "${pkgdir}"

    find "${pkgdir}" -exec touch -t "$(date -d "@${SOURCE_DATE_EPOCH}" +%Y%m%d%H%M.%S)" {} +
    
    dpkg-deb --root-owner-group --build "${pkgdir}" "deb/yandex-music_${version}_${pkgarch}.deb"
}

x64=0
armv7l=0
arm64=0

#checking for arch option (if not specified set x64) and h option
while getopts :a:h name; do
    case ${name} in
    a)
        case ${OPTARG} in
        x64) x64=1 ;;
        armv7l) armv7l=1 ;;
        arm64) arm64=1 ;;
        all)
            x64=1
            armv7l=1
            arm64=1
            ;;
        *)
            echo "Invalid architecture specified"
            usage
            exit 1
            ;;
        esac
        ;;
    h)
        usage
        exit 0
        ;;
    *)
        usage
        exit 1
        ;;
    esac
done

#checking if at least one arch is specified else set x64
if [ ${x64} -eq 0 ] && [ ${armv7l} -eq 0 ] && [ ${arm64} -eq 0 ]; then
    x64=1
fi

clear() {
    rm -rf "${TEMPDIR}"
}
TEMPDIR="$(mktemp -d)"
trap clear EXIT

#loading version info with jq
version=$(jq -r '.ym.version' ./utility/version_info.json)

mkdir -p "deb"

if [ ${x64} -eq 1 ]; then
    prepare_tarball "x64"
    build_deb "x64" "amd64"
fi

if [ ${armv7l} -eq 1 ]; then
    prepare_tarball "armv7l"
    build_deb "armv7l" "armhf"
fi

if [ ${arm64} -eq 1 ]; then
    prepare_tarball "arm64"
    build_deb "arm64" "arm64"
fi