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

set -e

# Get script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AMLBIAN_DIR="$(dirname "${SCRIPT_DIR}")"
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"  # Go up one more level from multimedia/tvserver
AMLBIAN_DIR="$(dirname "${AMLBIAN_DIR}")"  # Go up one more level from scripts
BUILD_DIR="${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="${BOARD:-s6-bq201}"
DEB_VERSION="${AML_UBOOTENV_VERSION:-1.0.0}"
ARCH="${ARCH:-arm64}"

# ==============================================================================
# Section 4: AML ubootenv Build Functions
# ==============================================================================

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

function __aml_ubootenv_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 "AML-UBOOTENV" "aml-comp not found: ${aml_comp_path}" "err"
        exit 1
    fi
    
    local source_dir="${aml_comp_path}/vendor/amlogic/aml_commonlib/ubootenv"
    
    if [[ ! -d "${source_dir}" ]]; then
        display_alert "AML-UBOOTENV" "Source directory not found: ${source_dir}" "err"
        exit 1
    fi
    
    display_alert "AML-UBOOTENV" "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
    
    display_alert "AML-UBOOTENV" "Source prepared successfully" "success"
}

function __aml_ubootenv_build {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "AML-UBOOTENV" "Starting aml-ubootenv build..." "info"
    
    # 检查源目录
    if [[ ! -d "${build_dir}" ]]; then
        display_alert "AML-UBOOTENV" "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-}"
    
    export ARCH="${ARCH}"
    export CROSS_COMPILE="${CROSS_COMPILE}"

    amlbian_checkout_toolchain
    
    # Create output directory
    local out_dir="${build_dir}/output"
    mkdir -p "${out_dir}"
    
    display_alert "AML-UBOOTENV" "Building aml-ubootenv library and binary..." "info"
    
    cd "${build_dir}"
    
    # Fix Makefile linking order: move -L$(OUT_DIR) -lubootenv after object files
    # Original: $(CC) -L$(OUT_DIR) -lubootenv $(patsubst %.o, $(OUT_DIR)/%.o, $<) -o $(OUT_DIR)/$@
    # Fixed:   $(CC) $(patsubst %.o, $(OUT_DIR)/%.o, $<) -L$(OUT_DIR) -lubootenv -o $(OUT_DIR)/$@
    if [[ -f "Makefile" ]]; then
        sed -i 's/\$(CC) -L\$(OUT_DIR) -lubootenv \$(patsubst \%.o, \$(OUT_DIR)\/%.o, \$<)/\$(CC) \$(patsubst \%.o, \$(OUT_DIR)\/%.o, \$<) -L\$(OUT_DIR) -lubootenv/g' Makefile
        display_alert "AML-UBOOTENV" "Fixed Makefile linking order" "debug"
    else
        display_alert "AML-UBOOTENV" "Makefile not found, skipping fix" "warn"
    fi
    
    # Build with appropriate flags
    make OUT_DIR="${out_dir}" \
        CC="${CROSS_COMPILE}gcc" \
        CFLAGS="-fPIC" \
        TARGET_DIR="${install_dir}" \
        STAGING_DIR="${BUILD_DIR}/staging" \
        -j$(nproc) \
        all 2>&1 | tee "${out_dir}/make.log" || {
            display_alert "AML-UBOOTENV" "Build failed" "err"
            return 1
        }
    
    # Verify build output
    local lib_file="${out_dir}/libubootenv.so"
    local bin_file="${out_dir}/uenv"
    
    if [[ ! -f "${lib_file}" ]]; then
        display_alert "AML-UBOOTENV" "Library file not found: ${lib_file}" "err"
        return 1
    fi
    
    if [[ ! -f "${bin_file}" ]]; then
        display_alert "AML-UBOOTENV" "Binary file not found: ${bin_file}" "err"
        return 1
    fi
    
    display_alert "AML-UBOOTENV" "Build completed successfully" "success"
    display_alert "AML-UBOOTENV" "Library: ${lib_file}" "debug"
    display_alert "AML-UBOOTENV" "Binary: ${bin_file}" "debug"
    
    return 0
}

function __aml_ubootenv_install {
    local build_dir="${1}"
    local install_dir="${2}"
    
    display_alert "AML-UBOOTENV" "Installing aml-ubootenv library and binary..." "info"
    
    local out_dir="${build_dir}/output"
    
    if [[ ! -d "${out_dir}" ]]; then
        display_alert "AML-UBOOTENV" "Output directory not found: ${out_dir}" "err"
        return 1
    fi
    
    # 创建安装目录结构
    mkdir -p "${install_dir}/usr/lib"
    mkdir -p "${install_dir}/usr/bin"
    mkdir -p "${install_dir}/usr/include"
    
    # 安装库文件
    display_alert "AML-UBOOTENV" "Installing library..." "info"
    
    local lib_file="${out_dir}/libubootenv.so"
    if [[ -f "${lib_file}" ]]; then
        install -m 0644 "${lib_file}" "${install_dir}/usr/lib/"
        display_alert "AML-UBOOTENV" "Installed libubootenv.so to ${install_dir}/usr/lib/" "debug"
    else
        display_alert "AML-UBOOTENV" "Library file not found: ${lib_file}" "err"
        return 1
    fi
    
    # 安装可执行文件
    display_alert "AML-UBOOTENV" "Installing binary..." "info"
    
    local bin_file="${out_dir}/uenv"
    if [[ -f "${bin_file}" ]]; then
        install -m 0755 "${bin_file}" "${install_dir}/usr/bin/"
        display_alert "AML-UBOOTENV" "Installed uenv to ${install_dir}/usr/bin/" "debug"
    else
        display_alert "AML-UBOOTENV" "Binary file not found: ${bin_file}" "err"
        return 1
    fi
    
    # 安装头文件
    display_alert "AML-UBOOTENV" "Installing headers..." "info"
    
    local header_file="${build_dir}/ubootenv.h"
    if [[ -f "${header_file}" ]]; then
        install -m 0644 "${header_file}" "${install_dir}/usr/include/"
        display_alert "AML-UBOOTENV" "Installed ubootenv.h to ${install_dir}/usr/include/" "debug"
    else
        display_alert "AML-UBOOTENV" "Header file not found: ${header_file}" "err"
        return 1
    fi
    
    # Also install to staging directory for cross-compilation
    if [[ -d "${BUILD_DIR}/staging" ]]; then
        mkdir -p "${BUILD_DIR}/staging/usr/lib"
        mkdir -p "${BUILD_DIR}/staging/usr/include"
        
        if [[ -f "${lib_file}" ]]; then
            install -m 0644 "${lib_file}" "${BUILD_DIR}/staging/usr/lib/"
            display_alert "AML-UBOOTENV" "Installed libubootenv.so to staging directory" "debug"
        fi
        
        if [[ -f "${header_file}" ]]; then
            install -m 0644 "${header_file}" "${BUILD_DIR}/staging/usr/include/"
            display_alert "AML-UBOOTENV" "Installed ubootenv.h to staging directory" "debug"
        fi
    fi
    
    display_alert "AML-UBOOTENV" "Installation completed" "success"
    return 0
}

function __aml_ubootenv_create_deb {
    local build_dir="${1}"
    local install_dir="${2}"
    
    # 设置必要的变量
    local pkg_name="aml-ubootenv"
    local version="${DEB_VERSION}"
    local architecture="${ARCH}"
    local maintainer="Armbian Build <build@armbian.com>"
    local description="Amlogic U-Boot environment library and tools"
    local description_long="This package provides the Amlogic U-Boot environment library (libubootenv) and utility (uenv) for managing U-Boot environment variables on Amlogic platforms."
    
    display_alert "AML-UBOOTENV" "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 "AML-UBOOTENV" "Copied installed files to ${deb_dir}" "info"
    else
        display_alert "AML-UBOOTENV" "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
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 "AML ubootenv library and tools 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 AML ubootenv library and tools"
fi

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

function amlbian_build_aml_ubootenv {
    if ! is_unit_enabled "aml-ubootenv" && ! is_unit_enabled "tvserver"; then
        display_alert "[SKIP] >> aml-ubootenv disable in BUILD_UNITS" "" "info"
        return
    fi

    if ! is_feature_contains "$DISTRO_FEATURES" "tvserver"; then
        display_alert "[SKIP] >> tvserver disable in DISTRO_FEATURES" "" "info"
        return
    fi
    
    display_alert "AMLOGIC: Building aml-ubootenv ${DEB_VERSION} ${BOARD}" "info"
    
    # Define all directory paths (in .tmp directory)
    local build_root="${BUILD_DIR}/.tmp/aml-ubootenv-build-${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
    __aml_ubootenv_prepare_source "${build_dir}"
    
    # 构建
    if ! __aml_ubootenv_build "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: aml-ubootenv build failed" "err"
        return 1
    fi
    
    # 安装到安装目录
    if ! __aml_ubootenv_install "${build_dir}" "${install_dir}"; then
        display_alert "AMLOGIC: aml-ubootenv installation failed" "err"
        return 1
    fi

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

    __unset_aml_ubootenv_config

    return 0
}

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

display_alert "AMLbian AML ubootenv Build Script" "Version: ${DEB_VERSION}, Board: ${BOARD}" "info"

amlbian_build_aml_ubootenv

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

# ==============================================================================
# End of build-aml-ubootenv.sh
# ==============================================================================