#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2026 AMLOGIC
#
# MediaCtrlSrc build script for AMLbian
# This script builds mediactrlsrc libraries for Amlogic SoCs
# Based on mediactrlsrc.bb functionality

set -e

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

# 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="${BOARD:-s6-bq201}"
MEDIACTRLSRC_VERSION="${MEDIACTRLSRC_VERSION:-1.0.0}"
: "${ARCH:=arm64}"
KERNEL_VERSION="${KERNEL_VERSION:-6.12}"

# Feature flags from DISTRO_FEATURES

CAMERA_ENABLE="${CAMERA_ENABLE:-false}"
HDMIRX_ENABLE="${HDMIRX_ENABLE:-false}"

# ==============================================================================
# Section 4: MediaCtrlSrc Build Functions
# ==============================================================================

function __unset_mediactrlsrc_config {
    # Clean up any environment variables set during build
    unset CFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    unset AMLSRC_MEDIACTRL_CAM
    unset AMLSRC_MEDIACTRL_HDMI
}

function __mediactrlsrc_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 "MEDIACTRLSRC" "aml-comp not found: ${aml_comp_path}" "err"
        exit 1
    fi
    
    local source_dir="${aml_comp_path}/vendor/amlogic/mediactrlsrc"
    
    if [[ ! -d "${source_dir}" ]]; then
        display_alert "MEDIACTRLSRC" "Source directory not found: ${source_dir}" "err"
        exit 1
    fi
    
    display_alert "MEDIACTRLSRC" "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 [[ ! -f "${build_dir}/Makefile" ]]; then
        display_alert "MEDIACTRLSRC" "Makefile not found in source" "err"
        exit 1
    fi
    
    display_alert "MEDIACTRLSRC" "Source prepared successfully" "success"
}

function __mediactrlsrc_build {
    local build_dir="${1}"
    
    display_alert "MEDIACTRLSRC" "Starting mediactrlsrc build..." "info"
    
    if [[ ! -d "${build_dir}" ]]; then
        display_alert "MEDIACTRLSRC" "Build directory not found: ${build_dir}" "err"
        return 1
    fi
    
    # Set build environment
    : "${ARCH:=arm64}"
    CROSS_COMPILE="${CROSS_COMPILE:-aarch64-linux-gnu-}"
    
    export ARCH
    export CROSS_COMPILE="${CROSS_COMPILE}"

    export AMLSRC_MEDIACTRL_CAM="${CAMERA_ENABLE}"
    export AMLSRC_MEDIACTRL_HDMI="${HDMIRX_ENABLE}"
    
    display_alert "MEDIACTRLSRC" "CAMERA_ENABLE=${CAMERA_ENABLE}" "info"
    display_alert "MEDIACTRLSRC" "HDMIRX_ENABLE=${HDMIRX_ENABLE}" "info"

    if [[ -n "${ROOTFS_TEMP}" ]] && [[ -d "${ROOTFS_TEMP}" ]] && [[ -d "${ROOTFS_TEMP}/usr/lib/aarch64-linux-gnu" ]]; then
        SYSROOT="${ROOTFS_TEMP}"
        display_alert "MEDIACTRLSRC" "Using ROOTFS_TEMP as sysroot: ${SYSROOT}" "info"
    else
        display_alert "MEDIACTRLSRC" "ROOTFS_TEMP not found or invalid: ${ROOTFS_TEMP}" "err"
        display_alert "MEDIACTRLSRC" "ROOTFS_TEMP should be created by create_base_rootfs function" "err"
        return 1
    fi
    
    export PKG_CONFIG=/usr/bin/pkg-config
    export PKG_CONFIG_SYSROOT_DIR="${SYSROOT}"
    export PKG_CONFIG_LIBDIR="${SYSROOT}/usr/lib/aarch64-linux-gnu/pkgconfig:${SYSROOT}/usr/share/pkgconfig"
    unset PKG_CONFIG_PATH

    # Set up flags with sysroot
    export CPPFLAGS="${CPPFLAGS} --sysroot=${SYSROOT}"
    export CFLAGS="${CFLAGS} --sysroot=${SYSROOT} -fPIC"
    export CXXFLAGS="${CXXFLAGS} --sysroot=${SYSROOT} -fPIC"
    export LDFLAGS="${LDFLAGS} --sysroot=${SYSROOT}"

    local include_flags="-I${ROOTFS_TEMP}/usr/include/aarch64-linux-gnu \
-I${ROOTFS_TEMP}/usr/include/glib-2.0 \
-I${ROOTFS_TEMP}/usr/lib/aarch64-linux-gnu/glib-2.0/include"

    export CPPFLAGS="${CPPFLAGS} ${include_flags}"
    export CFLAGS="${CFLAGS} ${include_flags}"
    export CXXFLAGS="${CXXFLAGS} ${include_flags}"

    export LDFLAGS="${LDFLAGS} -L${ROOTFS_TEMP}/usr/lib/aarch64-linux-gnu -L${ROOTFS_TEMP}/usr/aarch64-linux-gnu/lib"
    export LDFLAGS="${LDFLAGS} -Wl,-rpath-link,${ROOTFS_TEMP}/usr/lib/aarch64-linux-gnu"
    
    cd "${build_dir}"
    
    # Create output directory
    local out_dir="${build_dir}/output"
    mkdir -p "${out_dir}"
    
    display_alert "MEDIACTRLSRC" "Building using Makefile..." "info"
    display_alert "MEDIACTRLSRC" "CC=${CC}" "debug"
    
    # Add include paths
    local current_cflags="${CFLAGS}"
    current_cflags="${current_cflags} -I${build_dir}/include -I${build_dir}/amlv4l2src -I${build_dir}/amlv4l2src/amlsrc"
    
    # Build flags from mediactrlsrc.bb
    current_cflags="${current_cflags} -Wno-unused-result -Wno-unused-variable -Wno-unused-function -Os"
    
    export CFLAGS="${current_cflags}"
    export CXXFLAGS="${CXXFLAGS} ${current_cflags}"
    
    # Run make with OUT_DIR pointing to our output directory
    make OUT_DIR="${out_dir}" \
        TARGET_DIR="${out_dir}" \
        STAGING_DIR="${out_dir}" \
        CC="${CC}" \
        CFLAGS="${CFLAGS} -fPIC -Wall" \
        LDFLAGS="${LDFLAGS}" \
        -j$(nproc) \
        2>&1 | tee "${out_dir}/make.log" || {
            display_alert "MEDIACTRLSRC" "Build failed" "err"
            return 1
        }
    
    # Verify the libraries were created
    local libs_created=0
    local expected_libs=("libamlv4l2src.so" "libamlsrc.so")
    
    if [[ "${CAMERA_ENABLE}" == "true" ]]; then
        expected_libs+=("libcamsrc.so")
    fi
    
    if [[ "${HDMIRX_ENABLE}" == "true" ]]; then
        expected_libs+=("libhdmisrc.so")
    fi
    
    for lib in "${expected_libs[@]}"; do
        if [[ -f "${out_dir}/${lib}" ]]; then
            display_alert "MEDIACTRLSRC" "Library created: ${out_dir}/${lib}" "info"
            libs_created=$((libs_created + 1))
        else
            display_alert "MEDIACTRLSRC" "Library not found: ${lib}" "warn"
        fi
    done
    
    if [[ ${libs_created} -gt 0 ]]; then
        display_alert "MEDIACTRLSRC" "Build completed successfully (${libs_created} libraries)" "success"
    else
        display_alert "MEDIACTRLSRC" "No libraries were created" "err"
        return 1
    fi
    
    return 0
}

function __mediactrlsrc_install {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "MEDIACTRLSRC" "Installing mediactrlsrc..." "info"
    
    local out_dir="${build_dir}/output"
    
    if [[ ! -d "${out_dir}" ]]; then
        display_alert "MEDIACTRLSRC" "Output directory not found: ${out_dir}" "err"
        return 1
    fi
    
    # Create installation directories
    mkdir -p "${install_dir}/usr/lib"
    mkdir -p "${install_dir}/usr/include"
    mkdir -p "${install_dir}/usr/bin"
    
    # Install common libraries
    display_alert "MEDIACTRLSRC" "Installing common libraries..." "info"
    
    local common_libs=("libamlv4l2src.so" "libamlsrc.so")
    for lib in "${common_libs[@]}"; do
        if [[ -f "${out_dir}/${lib}" ]]; then
            install -m 0644 "${out_dir}/${lib}" "${install_dir}/usr/lib/"
            display_alert "MEDIACTRLSRC" "Installed ${lib} to ${install_dir}/usr/lib/" "debug"
        fi
    done
    
    # Install camera components if enabled
    if [[ "${CAMERA_ENABLE}" == "true" ]]; then
        display_alert "MEDIACTRLSRC" "Installing camera components..." "info"
        
        if [[ -f "${out_dir}/libcamsrc.so" ]]; then
            install -m 0644 "${out_dir}/libcamsrc.so" "${install_dir}/usr/lib/"
            display_alert "MEDIACTRLSRC" "Installed libcamsrc.so" "debug"
        fi
        
        if [[ -f "${out_dir}/camctrl" ]]; then
            install -m 0755 "${out_dir}/camctrl" "${install_dir}/usr/bin/"
            display_alert "MEDIACTRLSRC" "Installed camctrl to ${install_dir}/usr/bin/" "debug"
        fi
    fi
    
    # Install HDMI components if enabled
    if [[ "${HDMIRX_ENABLE}" == "true" ]]; then
        display_alert "MEDIACTRLSRC" "Installing HDMI components..." "info"
        
        if [[ -f "${out_dir}/libhdmisrc.so" ]]; then
            install -m 0644 "${out_dir}/libhdmisrc.so" "${install_dir}/usr/lib/"
            display_alert "MEDIACTRLSRC" "Installed libhdmisrc.so" "debug"
        fi
        
        if [[ -f "${out_dir}/hdmictrl" ]]; then
            install -m 0755 "${out_dir}/hdmictrl" "${install_dir}/usr/bin/"
            display_alert "MEDIACTRLSRC" "Installed hdmictrl to ${install_dir}/usr/bin/" "debug"
        fi
    fi
    
    # Install headers
    display_alert "MEDIACTRLSRC" "Installing headers..." "info"
    
    # Install amlv4l2src.h
    local amlv4l2src_header="${build_dir}/amlv4l2src/amlv4l2src.h"
    if [[ -f "${amlv4l2src_header}" ]]; then
        install -m 0644 -D "${amlv4l2src_header}" "${install_dir}/usr/include/"
        display_alert "MEDIACTRLSRC" "Installed amlv4l2src.h to ${install_dir}/usr/include/" "debug"
    fi
    
    # Install include/*.h files
    local include_dir="${build_dir}/include"
    if [[ -d "${include_dir}" ]]; then
        for header in "${include_dir}"/*.h; do
            if [[ -f "${header}" ]]; then
                install -m 0644 "${header}" "${install_dir}/usr/include/"
                display_alert "MEDIACTRLSRC" "Installed $(basename "${header}")" "debug"
            fi
        done
    fi
    
    display_alert "MEDIACTRLSRC" "Installation completed successfully" "success"
    return 0
}

function __mediactrlsrc_create_deb {
    local build_dir="${1}"
    local install_dir="${2}"
    
    # Package details
    local pkg_name="mediactrlsrc"
    local version="${MEDIACTRLSRC_VERSION}"
    local architecture="${ARCH:-arm64}"
    local maintainer="Amlbian Builder <build@amlbian.com>"
    local description="Amlogic Media Control Source libraries"
    local description_long="This package provides media control source libraries for Amlogic platforms, including camera and HDMI input support."
    
    display_alert "MEDIACTRLSRC" "Creating Debian package for ${pkg_name} ${version}..." "info"
    
    # Create Debian package directory structure
    local deb_dir="${build_dir}/deb/${pkg_name}-${version}"
    local debian_dir="${deb_dir}/DEBIAN"
    
    mkdir -p "${debian_dir}"
    
    # Copy installed files to package directory
    if [[ -d "${install_dir}" ]] && [[ "$(ls -A "${install_dir}")" ]]; then
        cp -r "${install_dir}"/* "${deb_dir}/" 2>/dev/null || true
        display_alert "MEDIACTRLSRC" "Copied installed files to ${deb_dir}" "info"
    else
        display_alert "MEDIACTRLSRC" "No installed files found in ${install_dir}" "warning"
        return 0
    fi
    
    # Create control file
    cat > "${debian_dir}/control" <<EOF
Package: ${pkg_name}
Version: ${version}
Architecture: ${architecture}
Maintainer: ${maintainer}
Description: ${description}
 ${description_long}
Depends: libc6
Section: libs
Priority: optional
EOF
    
    # Create postinst script for ldconfig
    cat > "${debian_dir}/postinst" << 'POSTINST_EOF'
#!/bin/sh
set -e

if [ "$1" = "configure" ]; then
    # Update ldconfig cache
    if command -v ldconfig >/dev/null 2>&1; then
        ldconfig
    fi
fi

exit 0
POSTINST_EOF
    
    chmod 755 "${debian_dir}/postinst"
    
    # Create prerm script
    cat > "${debian_dir}/prerm" << '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
fi

exit 0
PRERM_EOF
    
    chmod 755 "${debian_dir}/prerm"
    
    display_alert "MEDIACTRLSRC" "Building Debian package..." "info"
    
    # Build Debian package
    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 "MEDIACTRLSRC" "Debian package created: ${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${version}_${architecture}.deb" "success"
    else
        display_alert "MEDIACTRLSRC" "Failed to build Debian package" "err"
        return 1
    fi
    
    return 0
}

function amlbian_build_mediactrlsrc {
    # Check if mediactrlsrc is enabled in BUILD_UNITS
    if ! is_unit_enabled "mediactrlsrc"; then
        display_alert "[SKIP] >> mediactrlsrc disable in BUILD_UNITS" "" "info"
        return
    fi

    if ! is_feature_contains "$DISTRO_FEATURES" "mediactrlsrc"; then
        display_alert "[SKIP] >> mediactrlsrc disable in DISTRO_FEATURES" "" "info"
        return
    fi

    CAMERA_ENABLE="false"
    HDMIRX_ENABLE="true"
    
    display_alert "AMLOGIC: Building mediactrlsrc ${MEDIACTRLSRC_VERSION} ${BOARD}" "info"
    display_alert "AMLOGIC: Camera support: ${CAMERA_ENABLE}" "info"
    display_alert "AMLOGIC: HDMI support: ${HDMIRX_ENABLE}" "info"
    
    # Define all directory paths (in .tmp directory)
    local build_root="${BUILD_DIR}/.tmp/mediactrlsrc-build-${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
    __mediactrlsrc_prepare_source "${build_dir}"
    
    # 构建
    if ! __mediactrlsrc_build "${build_dir}"; then
        display_alert "AMLOGIC: mediactrlsrc build failed" "err"
        return 1
    fi
    
    # 安装到安装目录
    if ! __mediactrlsrc_install "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: mediactrlsrc installation failed" "err"
        return 1
    fi

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

    __unset_mediactrlsrc_config

    return 0
}

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

display_alert "AMLIbian MediaCtrlSrc Build Script" "Version: ${MEDIACTRLSRC_VERSION}, Board: ${BOARD}" "info"

amlbian_build_mediactrlsrc

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

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