#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2026 AMLOGIC
#
# gst-aml-dma-allocator build script for AMLbian
# This script builds gst-aml-dma-allocator 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_DMA_ALLOCATOR_VERSION:-1.0}"
#ARCH="${ARCH:-arm64}"
: "${ARCH:=arm64}"

# ==============================================================================
# Section 4: gst-aml-dma-allocator Build Functions
# ==============================================================================

function __unset_gst_aml_dma_allocator_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_dma_allocator_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-DMA-ALLOCATOR" "aml-comp not found: ${aml_comp_path}" "err"
        exit 1
    fi
    
    local source_dir="${aml_comp_path}/multimedia/gst-aml-utils/gst-aml-dma-allocator"
    
    if [[ ! -d "${source_dir}" ]]; then
        display_alert "GST-AML-DMA-ALLOCATOR" "Source directory not found: ${source_dir}" "err"
        exit 1
    fi
    
    display_alert "GST-AML-DMA-ALLOCATOR" "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 "${build_dir}/gstamldmaallocator.c" ]] || [[ ! -f "${build_dir}/Makefile" ]]; then
        display_alert "GST-AML-DMA-ALLOCATOR" "Source files not found in build directory" "warning"
    fi
    
    display_alert "GST-AML-DMA-ALLOCATOR" "Source prepared successfully" "success"
}

function __gst_aml_dma_allocator_build {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "GST-AML-DMA-ALLOCATOR" "Starting gst-aml-dma-allocator build..." "info"
    
    # 检查源目录
    if [[ ! -d "${build_dir}" ]]; then
        display_alert "GST-AML-DMA-ALLOCATOR" "Build directory not found: ${build_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-DMA-ALLOCATOR" "Using ROOTFS_TEMP as sysroot: ${SYSROOT}" "info"
    else
        display_alert "GST-AML-DMA-ALLOCATOR" "ROOTFS_TEMP not found or invalid: ${ROOTFS_TEMP}" "err"
        display_alert "GST-AML-DMA-ALLOCATOR" "ROOTFS_TEMP should be created by create_base_rootfs function" "err"
        return 1
    fi
    
    # Use sysroot configuration
    display_alert "GST-AML-DMA-ALLOCATOR" "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${SYSROOT}/usr/include/libdrm \
-I${SYSROOT}/usr/include/gstreamer-1.0/gst/allocators \
-I${build_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"
    
    # 进入源代码目录
    cd "${build_dir}" || {
        display_alert "GST-AML-DMA-ALLOCATOR" "Cannot enter build directory: ${build_dir}" "err"
        return 1
    }
    
    # 设置 Makefile 需要的变量
    export OUT_DIR="${build_dir}"
    export STAGING_DIR="${SYSROOT}"
    export TARGET_DIR="${install_dir}"
    export OBJDIR="."
    
    # 设置 PKG_CONFIG 路径
    export PKG_CONFIG="${STAGING_DIR}/usr/bin/pkg-config"
    
    # 设置 GST_CFLAGS 和 GST_LIBS（可选，Makefile 已经使用 pkg-config）
    export GST_CFLAGS="$(pkg-config --cflags gstreamer-1.0 gstreamer-base-1.0 gstreamer-allocators-1.0 gstreamer-video-1.0)"
    export GST_LIBS="$(pkg-config --libs gstreamer-1.0 gstreamer-base-1.0 gstreamer-allocators-1.0 gstreamer-video-1.0)"
    
    # 设置编译器
    export CC="${CROSS_COMPILE}gcc"
    export LD="${CROSS_COMPILE}ld"
    export AR="${CROSS_COMPILE}ar"
    export STRIP="${CROSS_COMPILE}strip"
    
    # 清理之前的构建
    display_alert "GST-AML-DMA-ALLOCATOR" "Cleaning previous build..." "info"
    make clean 2>/dev/null || true
    
    # 构建
    display_alert "GST-AML-DMA-ALLOCATOR" "Building with Makefile..." "info"
    
    # 使用 Makefile 构建
    make -j$(nproc) \
        CC="${CC}" \
        CFLAGS="${CFLAGS}" \
        LDFLAGS="${LDFLAGS}" \
        PKG_CONFIG="${PKG_CONFIG}" \
        STAGING_DIR="${STAGING_DIR}" \
        TARGET_DIR="${TARGET_DIR}" \
        OUT_DIR="${OUT_DIR}" \
        2>&1 | tee make.log || {
            display_alert "GST-AML-DMA-ALLOCATOR" "make failed" "err"
            return 1
        }
    
    # 验证构建输出
    local target_lib="${build_dir}/libgst-aml-dma-allocator.so"
    if [[ ! -f "${target_lib}" ]]; then
        display_alert "GST-AML-DMA-ALLOCATOR" "Target library not created: ${target_lib}" "err"
        return 1
    fi
    
    display_alert "GST-AML-DMA-ALLOCATOR" "Build completed successfully" "success"
    return 0
}

function __gst_aml_dma_allocator_install {
    local build_dir="${1}"
    local install_dir="${2}"

    display_alert "GST-AML-DMA-ALLOCATOR" \
        "Installing gst-aml-dma-allocator library..." "info"

    mkdir -p "${install_dir}/usr/include/gst/allocators"
    mkdir -p "${install_dir}/usr/lib/aarch64-linux-gnu"

    # install headers
    if [[ -d "${build_dir}/inc" ]]; then
        install -m 0644 \
            "${build_dir}"/inc/*.h \
            "${install_dir}/usr/include/gst/allocators/"
    fi

    # install shared library
    if [[ -f "${build_dir}/libgst-aml-dma-allocator.so" ]]; then
        install -m 0755 \
            "${build_dir}/libgst-aml-dma-allocator.so" \
            "${install_dir}/usr/lib/aarch64-linux-gnu/"
    else
        display_alert "GST-AML-DMA-ALLOCATOR" \
            "Shared library not found" "err"
        return 1
    fi

    display_alert "GST-AML-DMA-ALLOCATOR" \
        "Installation completed" "success"

    return 0
}

function __gst_aml_dma_allocator_create_deb {
    local build_dir="${1}"
    local install_dir="${2}"
    
    # 设置必要的变量
    local pkg_name="gst-aml-dma-allocator"
    local version="${DEB_VERSION}"
    local architecture="${ARCH}"
    local maintainer="Armbian Build <build@armbian.com>"
    local description="Amlogic DMA buffer allocator GStreamer library and headers"
    local description_long="This package provides Amlogic-specific DMA buffer allocator libraries for GStreamer. These plugins enable GStreamer to use Amlogic's DMA buffer allocation and management for hardware-accelerated multimedia processing."
    
    display_alert "GST-AML-DMA-ALLOCATOR" "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-DMA-ALLOCATOR" "Copied installed files to ${deb_dir}" "info"
    else
        display_alert "GST-AML-DMA-ALLOCATOR" "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), libdma-allocator (>= 1.0.0)
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-dma-allocator 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-dma-allocator"
fi

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

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

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

    __unset_gst_aml_dma_allocator_config

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

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

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

amlbian_build_gst_aml_dma_allocator

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

# ==============================================================================
# End of build-gst-aml-dma-allocator.sh
# ==============================================================================