#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2026 AMLOGIC
#
# gst-aml-gfx2d build script for AMLbian
# This script builds gst-aml-gfx2d library for Amlogic SoCs

set -e
umask 022

# Get script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AMLBIAN_DIR="$(dirname "${SCRIPT_DIR}")"        # amlbian/scripts/multimedia
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"       # amlbian/scripts  
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"       # amlbian
BUILD_DIR="${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="${BOARD:-s6-bq201}"
DEB_VERSION="${GST_AML_GFX2D_VERSION:-1.0}"
#ARCH="${ARCH:-arm64}"
: "${ARCH:=arm64}"

# ==============================================================================
# Section 4: gst-aml-gfx2d Build Functions
# ==============================================================================

function __unset_gst_aml_gfx2d_config {
    # Clean up any environment variables set during build
    unset EXTRA_OEMAKE
    unset SYSROOT
    unset CFLAGS
    unset CXXFLAGS
    unset LDFLAGS
    unset CPPFLAGS
}

function __gst_aml_gfx2d_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 "GST-AML-GFX2D" "aml-comp not found: ${aml_comp_path}" "err"
        exit 1
    fi
    
    local source_dir="${aml_comp_path}/multimedia/gst-aml-utils/gst-aml-gfx2d"
    
    if [[ ! -d "${source_dir}" ]]; then
        display_alert "GST-AML-GFX2D" "Source directory not found: ${source_dir}" "err"
        exit 1
    fi
    
    display_alert "GST-AML-GFX2D" "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}/gst-aml-gfx2d/Makefile" ]]; then
        display_alert "GST-AML-GFX2D" "Makefile not found in source" "warning"
    fi
    
    display_alert "GST-AML-GFX2D" "Source prepared successfully" "success"
}

function __gst_aml_gfx2d_build {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "GST-AML-GFX2D" "Starting gst-aml-gfx2d build..." "info"
    
    # 检查源目录
    local src_dir="${build_dir}/gst-aml-gfx2d"
    if [[ ! -d "${src_dir}" ]]; then
        display_alert "GST-AML-GFX2D" "Source directory not found: ${src_dir}" "err"
        return 1
    fi
    
    # 设置编译环境
    #ARCH="${ARCH:-arm64}"
    : "${ARCH:=arm64}"
    CROSS_COMPILE="${CROSS_COMPILE:-aarch64-linux-gnu-}"
    
    export ARCH
    export CROSS_COMPILE="${CROSS_COMPILE}"
    
    # amlbian_checkout_toolchain
    
    # Check if ROOTFS_TEMP exists, use it as sysroot, otherwise error
    local SYSROOT=""
    
    if [[ -n "${ROOTFS_TEMP}" ]] && [[ -d "${ROOTFS_TEMP}" ]] && [[ -d "${ROOTFS_TEMP}/usr/lib/aarch64-linux-gnu" ]]; then
        SYSROOT="${ROOTFS_TEMP}"
        display_alert "GST-AML-GFX2D" "Using ROOTFS_TEMP as sysroot: ${SYSROOT}" "info"
    else
        display_alert "GST-AML-GFX2D" "ROOTFS_TEMP not found or invalid: ${ROOTFS_TEMP}" "err"
        display_alert "GST-AML-GFX2D" "ROOTFS_TEMP should be created by create_base_rootfs function" "err"
        return 1
    fi
    
    # Use sysroot configuration
    display_alert "GST-AML-GFX2D" "Using sysroot: ${SYSROOT}" "info"
    
    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}"
    
    # Add sysroot-specific include paths
    local include_flags="-I${SYSROOT}/usr/include/aarch64-linux-gnu \
-I${SYSROOT}/usr/include/gstreamer-1.0 \
-I${SYSROOT}/usr/include/glib-2.0 \
-I${SYSROOT}/usr/lib/aarch64-linux-gnu/glib-2.0/include \
-I${SYSROOT}/usr/include/libge2d \
-I${src_dir}/inc"
    
    export CPPFLAGS="${CPPFLAGS} ${include_flags}"
    export CFLAGS="${CFLAGS} ${include_flags}"
    export CXXFLAGS="${CXXFLAGS} ${include_flags}"
    
    # Add sysroot-specific library paths
    export LDFLAGS="${LDFLAGS} -L${SYSROOT}/usr/lib/aarch64-linux-gnu -L${SYSROOT}/usr/aarch64-linux-gnu/lib"
    
    # Amlogic GE2D headers
    local aml_comp_path="$(amlbian_get_aml_comp_dir)"
    local aml_ge2d_header="${aml_comp_path}/kernel/${KERNEL_VER:-5.15}/common_drivers/include/uapi/amlogic/ge2d/ge2d.h"
    
    if [[ -f "${aml_ge2d_header}" ]]; then
        local aml_ge2d_include_dir="$(dirname "${aml_ge2d_header}")"
        export CPPFLAGS="${CPPFLAGS} -I${aml_ge2d_include_dir}"
        export CFLAGS="${CFLAGS} -I${aml_ge2d_include_dir}"
        export CXXFLAGS="${CXXFLAGS} -I${aml_ge2d_include_dir}"
        display_alert "GST-AML-GFX2D" "Found Amlogic GE2D headers: ${aml_ge2d_header}" "info"
    else
        display_alert "GST-AML-GFX2D" "Amlogic GE2D header not found: ${aml_ge2d_header}" "warning"
    fi
    
    # 进入源代码目录
    cd "${src_dir}" || {
        display_alert "GST-AML-GFX2D" "Cannot enter source directory: ${src_dir}" "err"
        return 1
    }
    
    # 设置Makefile需要的环境变量
    export OUT_DIR="${src_dir}"
    export STAGING_DIR="${install_dir}"
    export TARGET_DIR="${install_dir}"
    export OBJDIR="."
    
    # 从.bb文件中获取EXTRA_OEMAKE
    export EXTRA_OEMAKE="OUT_DIR=${OUT_DIR} TARGET_DIR=${TARGET_DIR} STAGING_DIR=${STAGING_DIR} DESTDIR=${install_dir} PKG_CONFIG=${PKG_CONFIG}"
    
    # 根据Makefile调整编译标志
    local gst_cflags="$(pkg-config --cflags gstreamer-1.0 gstreamer-base-1.0 2>/dev/null || echo "")"
    export LDFLAGS="${LDFLAGS} ${gst_cflags} -lge2d -ldma-allocator"
    
    # 构建
    display_alert "GST-AML-GFX2D" "Building with Makefile..." "info"
    
    # 清理之前的构建
    make clean 2>/dev/null || true
    
    # 构建库
    make -j$(nproc) ${EXTRA_OEMAKE} \
        CC="${CROSS_COMPILE}gcc" \
        CFLAGS="${CFLAGS}" \
        LDFLAGS="${LDFLAGS}" \
        all 2>&1 | tee make.log || {
            display_alert "GST-AML-GFX2D" "make failed" "err"
            return 1
        }
    
    # 验证构建结果
    local target_file="${OUT_DIR}/libgst-aml-gfx2d.so"
    if [[ ! -f "${target_file}" ]]; then
        display_alert "GST-AML-GFX2D" "Target library not found: ${target_file}" "err"
        return 1
    fi
    
    display_alert "GST-AML-GFX2D" "Build completed successfully" "success"
    return 0
}

function __gst_aml_gfx2d_install {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "GST-AML-GFX2D" "Installing gst-aml-gfx2d library..." "info"
    
    # 检查源目录
    local src_dir="${build_dir}/gst-aml-gfx2d"
    if [[ ! -d "${src_dir}" ]]; then
        display_alert "GST-AML-GFX2D" "Source directory not found: ${src_dir}" "err"
        return 1
    fi
    
    if [[ ! -d "${install_dir}" ]]; then
        display_alert "GST-AML-GFX2D" "Install directory not found: ${install_dir}" "err"
        return 1
    fi
    
    # 创建安装目录结构
    local lib_dir="${install_dir}/usr/lib/aarch64-linux-gnu"
    local include_dir="${install_dir}/usr/include"
    
    mkdir -p "${lib_dir}" "${include_dir}"
    
    # 安装头文件（从inc目录）
    local inc_dir="${src_dir}/inc"
    if [[ -d "${inc_dir}" ]]; then
        display_alert "GST-AML-GFX2D" "Installing header files from ${inc_dir}" "info"
        install -D -m 0644 "${inc_dir}"/*.h "${include_dir}/" 2>/dev/null || true
    else
        display_alert "GST-AML-GFX2D" "Header directory not found: ${inc_dir}" "warning"
    fi
    
    # 安装库文件
    local target_file="${src_dir}/libgst-aml-gfx2d.so"
    if [[ -f "${target_file}" ]]; then
        display_alert "GST-AML-GFX2D" "Installing library: ${target_file}" "info"
        install -D -m 0644 "${target_file}" "${lib_dir}/"
    else
        display_alert "GST-AML-GFX2D" "Library file not found: ${target_file}" "err"
        return 1
    fi
    
    # 验证安装
    if [[ -f "${lib_dir}/libgst-aml-gfx2d.so" ]]; then
        display_alert "GST-AML-GFX2D" "Library installed successfully: ${lib_dir}/libgst-aml-gfx2d.so" "info"
    else
        display_alert "GST-AML-GFX2D" "Library installation failed" "err"
        return 1
    fi
    
    display_alert "GST-AML-GFX2D" "Installation completed" "success"
    return 0
}

function __gst_aml_gfx2d_create_deb {
    local build_dir="${1}"
    local install_dir="${2}"
    
    # 设置必要的变量
    local pkg_name="gst-aml-gfx2d"
    local version="${DEB_VERSION}"
    local architecture="${ARCH}"
    local maintainer="Armbian Build <build@armbian.com>"
    local description="Amlogic 2D graphics processor with GE2D GStreamer library and headers"
    local description_long="This package provides Amlogic-specific 2D graphics processor libraries for GStreamer. These plugins enable GStreamer to use Amlogic's GE2D hardware-accelerated 2D graphics operations for multimedia processing."
    
    display_alert "GST-AML-GFX2D" "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 "GST-AML-GFX2D" "Copied installed files to ${deb_dir}" "info"
    else
        display_alert "GST-AML-GFX2D" "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: libgstreamer1.0-0 (>= 1.0.0), gstreamer1.0-plugins-base (>= 1.0.0), libge2d
Section: libs
Priority: optional
EOF
    
    # 创建postinst脚本，用于更新ldconfig和GStreamer插件缓存
    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
    
    # 更新GStreamer插件缓存
    if command -v gst-inspect-1.0 >/dev/null 2>&1; then
        gst-inspect-1.0 --gst-info >/dev/null 2>&1 || true
    fi
    
    echo "gst-aml-gfx2d 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 gst-aml-gfx2d"
fi

exit 0
EOF
    
    chmod 755 "${debian_dir}/prerm"
    
    display_alert "GST-AML-GFX2D" "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}_${architecture}.deb"
        chmod 755 "${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${version}_${architecture}.deb"
        display_alert "GST-AML-GFX2D" "Debian package created: ${output_dir}/linux-${pkg_name}-${BOARD}-amlbian_${version}_${architecture}.deb" "success"
    else
        display_alert "GST-AML-GFX2D" "Failed to build Debian package" "err"
        return 1
    fi
    
    return 0
}

function amlbian_build_gst_aml_gfx2d {
    if ! is_unit_enabled "gst-aml-gfx2d" && ! is_unit_enabled "gst-aml"; then
        display_alert "[SKIP] >> gst-aml-gfx2d disable in BUILD_UNITS" "" "info"
        return
    fi
    display_alert "AMLOGIC: Building gst-aml-gfx2d ${DEB_VERSION} ${BOARD}" "info"
    
    # Define all directory paths (in .tmp directory)
    local build_root="${BUILD_DIR}/.tmp/gst-aml-gfx2d-build-${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
    __gst_aml_gfx2d_prepare_source "${build_dir}"
    
    # 构建
    if ! __gst_aml_gfx2d_build "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: gst-aml-gfx2d build failed" "err"
        return 1
    fi
    
    # 安装到安装目录
    if ! __gst_aml_gfx2d_install "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: gst-aml-gfx2d installation failed" "err"
        return 1
    fi

    display_alert "AMLOGIC: Creating Debian package..." "info"
    __gst_aml_gfx2d_create_deb "${build_dir}" "${install_dir}"

    __unset_gst_aml_gfx2d_config

    #chmod -R 777 "${build_root}"
    rm -rf "${build_root}" 
    return 0
}

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

display_alert "AMLbian gst-aml-gfx2d Build Script" "Version: ${DEB_VERSION}, Board: ${BOARD}" "info"

amlbian_build_gst_aml_gfx2d

display_alert "AMLOGIC: gst-aml-gfx2d build completed" "${BUILD_DIR}/output" "info"

# ==============================================================================
# End of build-gst-aml-gfx2d.sh