#!/usr/bin/env bash
# Copyright (C) 2024 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

set -x

lib_dir="$1/lib"
additional_suffix="${2:-}"
set_rpath="${3:-yes}"

if [ "$(uname -s)" = "Darwin" ]; then
    # Under Homebrew, binutils package is not symlinked into PATH.
    # This lets us use readelf provided by Homebrew.
    readelf() { "$(brew --prefix binutils)/bin/readelf" "$@"; }
fi

ffmpeg_libs=("avcodec" "avdevice" "avfilter" "avformat" "avutil" "swresample" "swscale")

for lib_name in "${ffmpeg_libs[@]}"; do
    lib_path="$lib_dir/lib$lib_name.so"
    pkg_config_file_path="$lib_dir/pkgconfig/lib$lib_name.pc"

    if [ ! -f "$lib_path" ]; then
        echo "FFmpeg lib $lib_path hasn't been found"
        exit 1
    fi

    if [ ! -f "$pkg_config_file_path" ]; then
        echo "FFmpeg pc file $pkg_config_file_path hasn't been found"
        exit 1
    fi

    while read -r line; do
        if [[ $line =~ .*\[(lib((ssl|crypto|va|va-x11|va-drm)(_3)?\.so(\.[0-9]+)*))\].* ]]; then
            stub_name="libQt6FFmpegStub-${BASH_REMATCH[2]}"
            if [[ ${BASH_REMATCH[4]} == "_3" ]]; then
                stub_name="${stub_name/_3/}"  # Remove "_3" from stub_name
            fi
            if [[ -n "$additional_suffix" ]]; then
                stub_name="${stub_name%%.*}${additional_suffix}.${stub_name#*.}" # Add additional_suffix
            fi
            patchelf --replace-needed "${BASH_REMATCH[1]}" "${stub_name}" $lib_path
        fi
    done <<< "$(readelf -d $lib_path | grep '(NEEDED)' )"

    sed -i.bak -E '/^Libs.private:/s/ -l(va|va-x11|va-drm|ssl|crypto)/ -lQt6FFmpegStub-\1/g;' $pkg_config_file_path && rm -f ${pkg_config_file_path}.bak
    if [[ "$set_rpath" == "yes" ]]; then
        patchelf --set-rpath '$ORIGIN' $lib_path
    fi
done