#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2026 AMLOGIC
#
# Libamvenc build script for AMLbian
# This script builds libamvenc library for Amlogic SoCs

set -e

# Get script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AMLBIAN_DIR="$(dirname "$(dirname "$(dirname "${SCRIPT_DIR}")")")"
BUILD_DIR="${AMLBIAN_DIR}/../build"

# Source common functions
if [[ -f "${AMLBIAN_DIR}/lib/function-common.sh" ]]; then
    source "${AMLBIAN_DIR}/lib/function-common.sh"
fi

# ==============================================================================
# Section 2: Default Configuration
# ==============================================================================

BOARD="${BOARD:-s6-bq201}"
DEB_VERSION="${LIBAMVENC_VERSION:-1.0.0}"
ARCH="${ARCH:-arm64}"

# ==============================================================================
# Section 4: Libamvenc Build Functions
# ==============================================================================

function __unset_libamvenc_config {
    # Clean up any environment variables set during build
    #unset EXTRA_OEMAKE
    unset SYSROOT
    unset CFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    #unset CROSS_CC_PREFIX
    #unset CC
    #unset CXX
    #unset AR
}

function __libamvenc_prepare_source {
    local build_dir="${1}"

    local aml_comp_path="$(amlbian_get_aml_comp_dir)"
    if [[ -z "${aml_comp_path}" ]] || [[ ! -d "${aml_comp_path}" ]]; then
        display_alert "LIBAMVENC" "aml-comp not found: ${aml_comp_path}" "err"
        exit 1
    fi
    
    local source_dir="${aml_comp_path}/hardware/amlogic/libencoder/amvenc"
    
    if [[ ! -d "${source_dir}" ]]; then
        display_alert "LIBAMVENC" "Source directory not found: ${source_dir}" "err"
        exit 1
    fi
    
    display_alert "LIBAMVENC" "Copying source from ${source_dir} to ${build_dir}" "info"
    
    # 清空构建目录
    rm -rf "${build_dir}"
    mkdir -p "${build_dir}"
    
    # 复制源代码到构建目录
    cp -r "${source_dir}"/* "${build_dir}/" 2>/dev/null || true
    
    # Check for necessary source files
    if [[ ! -d "${build_dir}/amvenc_lib" ]]; then
        display_alert "LIBAMVENC" "amvenc_lib directory not found in source" "err"
        exit 1
    fi
    
    display_alert "LIBAMVENC" "Source prepared successfully" "success"
}

function __libamvenc_build_depend {
    local build_dir="${1}"

    # libion dependency check
    local libion_dir="${BUILD_DIR}/.tmp/libion-build-${ARCH:-arm64}"
    if [ -z "${libion_dir}" ] || [ ! -d "${libion_dir}" ]; then
        display_alert "LIBAMVENC" "libion not found in ${BUILD_DIR}/.tmp build." "info"
        display_alert "AMLOGIC" "TODO>> Start build libion " "info"

        if ! (
            source "${AMLBIAN_DIR}/scripts/build-libion.sh"
        ); then
            display_alert "ERROR" "build-libion failed" "err"
            return 1
        fi

        if [ -z "${libion_dir}" ] || [ ! -d "${libion_dir}" ]; then
            display_alert "ERROR" "libion build finished but directory still not found" "err"
            return 1
        fi

    fi

    display_alert "LIBAMVENC" "libion dir: ${libion_dir}" "info"

    # Add libion headers to compilation flags
    local ionmem_head_flags="-I${libion_dir}/build/include -I${libion_dir}/build/include/ion"
    export CPPFLAGS="${CPPFLAGS} -I${libion_dir}/build/include -I${libion_dir}/build/include/ion"
    export CFLAGS="${CFLAGS} -I${libion_dir}/build/include -I${libion_dir}/build/include/ion"
    export CXXFLAGS="${CXXFLAGS} -I${libion_dir}/build/include -I${libion_dir}/build/include/ion"

    export LDFLAGS="${LDFLAGS} -L${libion_dir}/build"
}

function __libamvenc_build {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "LIBAMVENC" "Starting libamvenc build..." "info"
    
    # 检查源目录
    if [[ ! -d "${build_dir}" ]]; then
        display_alert "LIBAMVENC" "Build directory not found: ${build_dir}" "err"
        return 1
    fi
    
    # 设置编译环境
    ARCH="${ARCH:-arm64}"
    CROSS_COMPILE="${CROSS_COMPILE:-aarch64-linux-gnu-}"
    SYSROOT="${SYSROOT:-/opt/arm64-sysroot}"
    
    export ARCH="${ARCH}"
    export CROSS_COMPILE="${CROSS_COMPILE}"    

    # amlbian_checkout_toolchain

    __libamvenc_build_depend "${build_dir}"
    
    # 创建输出目录
    local out_dir="${build_dir}/output"
    mkdir -p "${out_dir}"
    
    # Set environment variables for Makefile
    export CROSS_CC_PREFIX="${CROSS_COMPILE}"
    export CC="${CROSS_COMPILE}gcc"
    export CXX="${CROSS_COMPILE}g++"
    export AR="${CROSS_COMPILE}ar"
    
    # Build libamvenc_lib
    display_alert "LIBAMVENC" "Building libamvenc library..." "info"
    cd "${build_dir}"
    
    make OUT_DIR="${out_dir}/amvenc_lib" -C "${build_dir}/amvenc_lib" \
        -j$(nproc) \
        2>&1 | tee "${out_dir}/make_lib.log" || {
            display_alert "LIBAMVENC" "Library build failed" "err"
            return 1
        }
    
    # Build amvenc_test
    display_alert "LIBAMVENC" "Building amvenc_test..." "info"
    
    # Fix Makefile bug: replace LDFLAGS with CFLAGS in compilation rule
    local test_makefile="${build_dir}/amvenc_test/Makefile"
    if [[ -f "${test_makefile}" ]]; then
        display_alert "LIBAMVENC" "Fixing Makefile bug..." "info"
        sed -i 's/\$(CC) \$(LDFLAGS) -c/\$(CC) \$(CFLAGS) -c/g' "${test_makefile}"
        sed -i 's#$(CC) -o $(OUT_DIR)/$(TARGET) $(LDFLAGS) $(LDLIBS) $(OBJECTPATHS)#$(CC) $(OBJECTPATHS) -o $(OUT_DIR)/$(TARGET) $(LDFLAGS) $(LDLIBS)#' "${test_makefile}"
        display_alert "LIBAMVENC" "Fixed Makefile line 57: replaced LDFLAGS with CFLAGS" "debug"
    fi
    
    # Set test-specific CFLAGS
    local test_cflags="${CFLAGS} -I. -I../amvenc_lib/include"
    
    make OUT_DIR="${out_dir}/amvenc_test" -C "${build_dir}/amvenc_test" \
        CC="${CC}" \
        CFLAGS="${test_cflags}" \
        LDFLAGS="${LDFLAGS}" \
        -j$(nproc) \
        2>&1 | tee "${out_dir}/make_test.log" || {
            display_alert "LIBAMVENC" "Test program build failed" "err"
            return 1
        }
    
    # Copy built files to output directory
    mkdir -p "${out_dir}/lib" "${out_dir}/bin"
    if [[ -f "${out_dir}/amvenc_lib/libamvenc.so" ]]; then
        cp "${out_dir}/amvenc_lib/libamvenc.so" "${out_dir}/lib/"
    fi
    if [[ -f "${out_dir}/amvenc_test/amvenc_test" ]]; then
        cp "${out_dir}/amvenc_test/amvenc_test" "${out_dir}/bin/"
    fi
    
    display_alert "LIBAMVENC" "Build completed successfully" "success"
    return 0
}

function __libamvenc_install {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "LIBAMVENC" "Installing libamvenc library..." "info"
    
    # Get SYSROOT from build environment or use default
    local SYSROOT="${SYSROOT:-/opt/arm64-sysroot}"
    
    local out_dir="${build_dir}/output"
    
    if [[ ! -d "${out_dir}" ]]; then
        display_alert "LIBAMVENC" "Output directory not found: ${out_dir}" "err"
        return 1
    fi
    
    # 创建安装目录结构
    mkdir -p "${install_dir}/usr/include"
    mkdir -p "${install_dir}/usr/lib"
    mkdir -p "${install_dir}/usr/bin"
    
    # 安装库文件
    display_alert "LIBAMVENC" "Installing library..." "info"
    
    local lib_file="${out_dir}/lib/libamvenc.so"
    if [[ -f "${lib_file}" ]]; then
        install -m 0644 -D "${lib_file}" "${install_dir}/usr/lib/"
        display_alert "LIBAMVENC" "Library installed to ${install_dir}/usr/lib/" "info"
    else
        display_alert "LIBAMVENC" "Library file not found: ${lib_file}" "err"
        return 1
    fi
    
    # 安装头文件
    display_alert "LIBAMVENC" "Installing header..." "info"
    local header_file="${build_dir}/amvenc_lib/include/amvenc.h"
    if [[ -f "${header_file}" ]]; then
        install -m 0644 -D "${header_file}" "${install_dir}/usr/include/"
        display_alert "LIBAMVENC" "Header installed: amvenc.h" "debug"
    else
        display_alert "LIBAMVENC" "Header file not found: ${header_file}" "warning"
    fi
    
    # 安装测试程序
    display_alert "LIBAMVENC" "Installing test program..." "info"
    local test_program="${out_dir}/bin/amvenc_test"
    if [[ -f "${test_program}" ]]; then
        install -m 0755 "${test_program}" "${install_dir}/usr/bin/"
        display_alert "LIBAMVENC" "Binary installed: amvenc_test" "debug"
    else
        display_alert "LIBAMVENC" "Test program not found: ${test_program}" "warning"
    fi
    
    display_alert "LIBAMVENC" "Installation completed successfully" "success"
    return 0
}

function __libamvenc_create_deb {
    local build_dir="${1}"
    local install_dir="${2}"
    
    # 设置必要的变量
    local pkg_name="libamvenc"
    local version="${DEB_VERSION}"
    local architecture="${ARCH}"
    local maintainer="Armbian Build <build@armbian.com>"
    local description="Amlogic libamvenc library (encoder hal) for Amlogic platforms"
    local description_long="This package provides the Amlogic libamvenc library used by multimedia encoding on Amlogic platforms."
    
    display_alert "LIBAMVENC" "Creating Debian package for ${pkg_name} ${version}..." "info"
    
    # 创建Debian包控制文件
    local deb_dir="${build_dir}/deb/${pkg_name}-${version}"
    local debian_dir="${deb_dir}/DEBIAN"
    
    mkdir -p "${debian_dir}"
    
    # 将安装目录的内容复制到debian-root
    if [[ -d "${install_dir}" ]] && [[ "$(ls -A "${install_dir}")" ]]; then
        cp -r "${install_dir}"/* "${deb_dir}/" 2>/dev/null || true
        display_alert "LIBAMVENC" "Copied installed files to ${deb_dir}" "info"
    else
        display_alert "LIBAMVENC" "No installed files found in ${install_dir}" "warn"
        return 0
    fi
    
    # 创建control文件
    cat > "${debian_dir}/control" <<EOF
Package: ${pkg_name}
Version: ${version}
Architecture: ${architecture}
Maintainer: ${maintainer}
Description: ${description}
 ${description_long}
Depends: libc6, libion
Section: libs
Priority: optional
EOF
    
    # 创建postinst脚本，用于更新ldconfig
    cat > "${debian_dir}/postinst" <<EOF
#!/bin/sh
set -e
  
if [ "\$1" = "configure" ]; then
    # 更新ldconfig缓存
    if command -v ldconfig >/dev/null 2>&1; then
        ldconfig
    fi
    
    echo "Libamvenc library installed successfully"
fi

exit 0
EOF
    
    chmod 755 "${debian_dir}/postinst"
    
    # 创建prerm脚本
    cat > "${debian_dir}/prerm" <<EOF
#!/bin/sh
set -e

if [ "\$1" = "remove" ] || [ "\$1" = "deconfigure" ]; then
    # Update ldconfig
    if command -v ldconfig >/dev/null 2>&1; then
        ldconfig
    fi
    echo "Removing libamvenc library"
fi

exit 0
EOF
    
    chmod 755 "${debian_dir}/prerm"
    
    display_alert "LIBAMVENC" "Building Debian package..." "info"
    
    # 构建Debian包
    cd "${build_dir}/deb"
    dpkg-deb --build "${pkg_name}-${version}"
    
    local deb_file="${pkg_name}-${version}.deb"
    if [[ -f "${deb_file}" ]]; then
        local output_dir="${BUILD_DIR}/output"
        mkdir -p "${output_dir}"
        mv "${deb_file}" "${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${version}_${architecture}.deb"
        display_alert "LIBAMVENC" "Debian package created: ${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${version}_${architecture}.deb" "success"
    else
        display_alert "LIBAMVENC" "Failed to build Debian package" "err"
        return 1
    fi
    
    return 0
}

function amlbian_build_libamvenc {
    if ! is_unit_enabled "libamvenc" && ! is_unit_enabled "libencoder"; then
        display_alert "[SKIP] >> libamvenc disable in BUILD_UNITS" "" "info"
        return
    fi
    display_alert "AMLOGIC: Building libamvenc ${DEB_VERSION} ${BOARD}" "info"
    
    # Define all directory paths (in .tmp directory)
    local build_root="${BUILD_DIR}/.tmp/libamvenc-build-${ARCH:-arm64}"
    local build_dir="${build_root}/build"        # Build directory with source code
    local install_dir="${build_root}/install"    # Install directory

    rm -rf "${build_root}" 

    # 创建目录
    mkdir -p "${build_dir}" "${install_dir}"

    display_alert "AMLOGIC: build_dir  ${build_dir}" "info"
    display_alert "AMLOGIC: install_dir  ${install_dir}" "info"
    display_alert "AMLOGIC: output_dir  ${BUILD_DIR}/output" "info"

    # 准备源代码
    __libamvenc_prepare_source "${build_dir}"
    
    # 构建
    if ! __libamvenc_build "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: Libamvenc build failed" "err"
        return 1
    fi
    
    # 安装到安装目录
    if ! __libamvenc_install "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: Libamvenc installation failed" "err"
        return 1
    fi

    display_alert "AMLOGIC: Creating Debian package..." "info"
    __libamvenc_create_deb "${build_dir}" "${install_dir}"

    __unset_libamvenc_config

    return 0
}

# ==============================================================================
# Section 5: Main
# ==============================================================================

display_alert "AMLIbian Libamvenc Build Script" "Version: ${DEB_VERSION}, Board: ${BOARD}" "info"

amlbian_build_libamvenc

display_alert "AMLOGIC: Libamvenc build completed" "${BUILD_DIR}/output" "info"

# ==============================================================================
# End of build-libamvenc.sh
# ==============================================================================