#!/usr/bin/env sh

set -o errexit
# set -x

GNUZILLA_GIT="https://git.savannah.gnu.org/git/gnuzilla.git"
ROOT_DIR="${PWD}"
BUILD_DIR="${ROOT_DIR}/build"
INSTALL_PREFIX="${ROOT_DIR}/icecat/usr"
DEBIAN_DIR="${ROOT_DIR}/DEBIAN"
ICECAT_VERSION="115.21.0"

install_deps() {
    sudo apt install -y git gpg mercurial rename python3-jsonschema clang pkg-config libasound2-dev libpulse-dev curl cbindgen nodejs libpango1.0-dev unzip libxtst-dev libxdamage-dev libxcursor-dev libxcomposite-dev libxrandr-dev libx11-dev libxcb1-dev libx11-xcb-dev nasm libgtk-3-dev libdbus-glib-1-dev make m4
}

make_icecat() {
    mkdir "$BUILD_DIR"
    git clone "${GNUZILLA_GIT}" "${BUILD_DIR}/gnuzilla"
    cd "${BUILD_DIR}/gnuzilla"
    ./makeicecat
}

build_icecat() {
    cd "${BUILD_DIR}/gnuzilla/output/icecat-${ICECAT_VERSION}"
    mkdir obj
    cd obj
    ../configure --without-wasm-sandboxed-libraries --prefix="$INSTALL_PREFIX"
    make
    make install
}

prepare_deb() {
    # Set permissions to 644
    find "${INSTALL_PREFIX}/lib/icecat" -name "*.so" -exec chmod 644 {} \;

    # Create symlinks to icecat.png
    for size in "16x16" "32x32" "48x48" "64x64" "128x128"; do mkdir -p "${INSTALL_PREFIX}/share/icons/hicolor/${size}/apps"; done
    ln -sf "${INSTALL_PREFIX}/lib/icecat/browser/chrome/icons/default/default16.png" "${INSTALL_PREFIX}/share/icons/hicolor/16x16/apps/icecat.png"
    ln -sf "${INSTALL_PREFIX}/lib/icecat/browser/chrome/icons/default/default32.png" "${INSTALL_PREFIX}/share/icons/hicolor/32x32/apps/icecat.png"
    ln -sf "${INSTALL_PREFIX}/lib/icecat/browser/chrome/icons/default/default48.png" "${INSTALL_PREFIX}/share/icons/hicolor/48x48/apps/icecat.png"
    ln -sf "${INSTALL_PREFIX}/lib/icecat/browser/chrome/icons/default/default64.png" "${INSTALL_PREFIX}/share/icons/hicolor/64x64/apps/icecat.png"
    ln -sf "${INSTALL_PREFIX}/lib/icecat/browser/chrome/icons/default/default128.png" "${INSTALL_PREFIX}/share/icons/hicolor/128x128/apps/icecat.png"

    # Copy icecat.desktop
    mkdir -p "${INSTALL_PREFIX}/share/applications"
    cp -v "${ROOT_DIR}/icecat.desktop" "${INSTALL_PREFIX}/share/applications/icecat.desktop"
}

update_changelog() {
    CHANGELOG_DATE=$(date -u +"%a, %d %b %Y %H:%M:%S %z")

    cat >>"${DEBIAN_DIR}/changelog-head" <<EOF
icecat ($ICECAT_VERSION-1) unstable; urgency=medium

  * Update to $ICECAT_VERSION.

 -- hyperreal <hyperreal@moonshadow.dev> $CHANGELOG_DATE
EOF

    cp -fv "${DEBIAN_DIR}/changelog" "${DEBIAN_DIR}/changelog-tail"
    cat "${DEBIAN_DIR}/changelog-head" "${DEBIAN_DIR}/changelog-tail" >"${DEBIAN_DIR}/changelog"
    rm -fv "${DEBIAN_DIR}/changelog-head" "${DEBIAN_DIR}/changelog-tail"
    mkdir -p "${INSTALL_PREFIX}/share/doc/icecat/"
    cp -fv "${DEBIAN_DIR}/changelog" "${INSTALL_PREFIX}/share/doc/icecat/"
    gzip --best -n "${INSTALL_PREFIX}/share/doc/icecat/changelog"
    cp -fv "${DEBIAN_DIR}/copyright" "${INSTALL_PREFIX}/share/doc/icecat/"
}

build_deb() {
    mv "${ROOT_DIR}/icecat" "${ROOT_DIR}/icecat-${ICECAT_VERSION}-1_amd64"
    dpkg-deb --root-owner-group --build "${ROOT_DIR}/icecat-${ICECAT_VERSION}-1_amd64"
}

usage() {
    echo "build.sh install_deps         Install build dependencies"
    echo "build.sh make_icecat          Run ./makeicecat"
    echo "build.sh build_icecat         Build the Icecat program"
    echo "build.sh prepare_deb          Prepare files for Debian package"
    echo "build.sh update_changelog     Update the changelog file"
    echo "build.sh build_deb            Build the .deb package"
    echo ""
    echo "Note: The commands above are expected to be run in succession, from top to bottom."
    echo "Each successive step depends on state changes from the previous step(s)."
    echo "This script won't work otherwise."
}

if [ "$#" -ne 1 ]; then
    usage
fi

case "$1" in
"install_deps")
    install_deps
    ;;
"make_icecat")
    make_icecat
    ;;
"build_icecat")
    build_icecat
    ;;
"prepare_deb")
    prepare_deb
    ;;
"update_changelog")
    update_changelog
    ;;
"build_deb")
    build_deb
    ;;
"*")
    usage
    exit 1
    ;;
esac