name: Build Android OnePlus SM8650 Kernel
on:
  workflow_dispatch:
    inputs:
      enable_bbr:
        description: "Enable BBR TCP Congestion Control"
        required: false
        default: "true"
        type: boolean
      kernel_name:
        description: "Custom kernel name (optional)"
        required: false
        default: "CustomKernel"
        type: string

jobs:
  build-kernel:
    runs-on: ubuntu-latest
    env:
      ARCH: arm64
      SUBARCH: arm64
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install dependencies and update GCC
        run: |
          sudo apt-get update
          sudo apt-get install -y \
            bc bison build-essential cpio curl flex \
            git libncurses-dev libssl-dev \
            libelf-dev lzop python3 unzip xz-utils \
            zstd rsync ca-certificates wget \
            pahole dwarves zip

          # 安装更新的GCC以满足内核版本要求
          sudo apt-get install -y gcc-9 g++-9
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90
          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 90

          # 验证GCC版本
          gcc --version

      - name: Setup directory structure
        run: |
          # 创建与本地一致的目录结构
          mkdir -p $GITHUB_WORKSPACE/kernel/toolchains
          mkdir -p $GITHUB_WORKSPACE/kernel/source
          mkdir -p $GITHUB_WORKSPACE/kernel/anykernel3
          mkdir -p $GITHUB_WORKSPACE/kernel/output

          echo "=== Created directory structure ==="
          ls -la $GITHUB_WORKSPACE/kernel/

      - name: Setup toolchains
        run: |
          cd $GITHUB_WORKSPACE/kernel

          echo "=== 下载 ARM GCC 工具链 ==="
          # 下载ARM GCC工具链
          git clone --depth=1 \
            https://github.com/LineageOS/android_prebuilts_gcc_linux-x86_arm_arm-linux-androideabi-4.9.git \
            ./toolchains/gcc-arm-4.9

          echo "=== 下载 Clang 工具链 ==="
          # 创建 Clang 目录
          mkdir -p ./toolchains/clang-14

          # 下载 Clang 工具链
          cd toolchains
          wget -q https://github.com/ZyCromerZ/Clang/releases/download/14.0.6-20240212-release/Clang-14.0.6-20240212.tar.gz

          # 检查下载是否成功
          if [ ! -f "Clang-14.0.6-20240212.tar.gz" ]; then
              echo "Error: Clang 工具链下载失败"
              exit 1
          fi

          echo "=== 解压 Clang 工具链 ==="
          # 解压到 clang-14 目录
          tar -xzf Clang-14.0.6-20240212.tar.gz -C clang-14

          # 检查解压后的目录结构
          echo "=== 检查解压后的目录结构 ==="
          ls -la clang-14/

          # 如果存在嵌套目录，需要调整
          if [ -d "clang-14/Clang-14.0.6-20240212" ]; then
              echo "检测到嵌套目录，正在调整..."
              mv clang-14/Clang-14.0.6-20240212/* clang-14/
              rmdir clang-14/Clang-14.0.6-20240212
          fi

          # 清理下载的压缩包
          rm -f Clang-14.0.6-20240212.tar.gz

          # 返回 kernel 目录
          cd $GITHUB_WORKSPACE/kernel

          echo "=== 验证工具链二进制文件 ==="
          # 验证关键工具存在
          echo "检查 Clang 二进制文件..."
          if [ -f "./toolchains/clang-14/bin/clang" ]; then
              echo "✓ clang 存在"
              ls -la ./toolchains/clang-14/bin/clang
          else
              echo "✗ clang 不存在，检查目录结构:"
              find ./toolchains/clang-14 -name "clang" -type f 2>/dev/null || echo "未找到 clang 二进制文件"
              exit 1
          fi

          echo "检查 aarch64-linux-gnu 工具..."
          if ls ./toolchains/clang-14/bin/aarch64-linux-gnu-* 1> /dev/null 2>&1; then
              echo "✓ aarch64-linux-gnu 工具存在"
              ls -la ./toolchains/clang-14/bin/aarch64-linux-gnu-* | head -3
          else
              echo "✗ aarch64-linux-gnu 工具不存在"
          fi

          echo "检查 LLVM 工具..."
          if ls ./toolchains/clang-14/bin/llvm-* 1> /dev/null 2>&1; then
              echo "✓ LLVM 工具存在"
              ls -la ./toolchains/clang-14/bin/llvm-* | head -3
          else
              echo "✗ LLVM 工具不存在"
          fi

          echo "检查 ARM GCC 工具..."
          if ls ./toolchains/gcc-arm-4.9/bin/arm-linux-androideabi-* 1> /dev/null 2>&1; then
              echo "✓ ARM GCC 工具存在"
              ls -la ./toolchains/gcc-arm-4.9/bin/arm-linux-androideabi-* | head -3
          else
              echo "✗ ARM GCC 工具不存在"
          fi

          echo "=== 最终目录结构 ==="
          echo "kernel/"
          ls -la ./
          echo "kernel/toolchains/"
          ls -la ./toolchains/
          echo "工具链设置完成 ==="

      - name: Clone kernel source
        run: |
          cd $GITHUB_WORKSPACE/kernel
          git clone --depth=1 \
            https://github.com/crdroidandroid/android_kernel_oneplus_sm8650.git \
            ./source/android_kernel_oneplus_sm8650

          echo "=== 内核源码目录结构 ==="
          echo "kernel/source/"
          ls -la ./source/

      - name: Clone AnyKernel3
        run: |
          cd $GITHUB_WORKSPACE/kernel
          git clone --depth=1 https://github.com/osm0sis/AnyKernel3.git ./anykernel3

          echo "=== AnyKernel3 目录结构 ==="
          ls -la ./anykernel3/

      - name: Copy config to kernel source
        run: |
          cd $GITHUB_WORKSPACE/kernel
          if [ -f "$GITHUB_WORKSPACE/config" ]; then
            cp $GITHUB_WORKSPACE/config ./source/android_kernel_oneplus_sm8650/myconfig
            echo "Custom config copied"
          else
            echo "Error: config file not found!"
            exit 1
          fi

      - name: Configure BBR if enabled
        run: |
          cd $GITHUB_WORKSPACE/kernel/source/android_kernel_oneplus_sm8650

          if [ "${{ inputs.enable_bbr }}" = "true" ]; then
            echo "=== 启用 BBR TCP 拥塞控制 ==="
            
            # 在 myconfig 文件中添加或修改 BBR 相关配置
            echo "" >> myconfig
            echo "# BBR TCP Congestion Control" >> myconfig
            echo "CONFIG_TCP_CONG_ADVANCED=y" >> myconfig
            echo "CONFIG_TCP_CONG_BBR=y" >> myconfig
            echo "CONFIG_DEFAULT_TCP_CONG=\"bbr\"" >> myconfig
            echo "CONFIG_DEFAULT_BBR=y" >> myconfig
            echo "# CONFIG_DEFAULT_CUBIC is not set" >> myconfig
            echo "# CONFIG_DEFAULT_RENO is not set" >> myconfig
            
            echo "✅ BBR 配置已添加到 myconfig"
            echo "=== BBR 相关配置 ==="
            grep -i bbr myconfig || echo "BBR 配置未找到"
            grep -i tcp_cong myconfig || echo "TCP_CONG 配置未找到"
          else
            echo "BBR 未启用，跳过配置"
          fi

      - name: Build kernel
        run: |
          cd $GITHUB_WORKSPACE/kernel/source/android_kernel_oneplus_sm8650

          # 记录开始时间
          starttime=$(date +'%Y-%m-%d %H:%M:%S')
          echo "Build started at: $starttime"

          # 设置环境变量（与你本地脚本完全一致）
          export ARCH=arm64
          export SUBARCH=arm64
          export KCONFIG_CONFIG=$PWD/myconfig

          # 设置工具链路径变量（使用相对路径匹配你的本地环境）
          CLANG_PATH=$GITHUB_WORKSPACE/kernel/toolchains/clang-14/bin
          GCC_ARM_PATH=$GITHUB_WORKSPACE/kernel/toolchains/gcc-arm-4.9/bin

          # 验证所有必需的工具
          echo "=== Verifying required tools ==="
          $CLANG_PATH/clang --version | head -2
          $CLANG_PATH/aarch64-linux-gnu-gcc --version | head -1 || echo "aarch64-linux-gnu-gcc not found"
          $GCC_ARM_PATH/arm-linux-androideabi-gcc --version | head -1
          test -f $CLANG_PATH/ld.lld && echo "ld.lld found" || echo "ld.lld not found"
          gcc --version | head -1
          echo "================================"

          # 清理构建目录
          rm -rf out
          mkdir -p out

          # 生成默认 config（与你本地脚本完全一致）
          make O=out KCONFIG_CONFIG=$KCONFIG_CONFIG olddefconfig

          # 检查 BBR 是否已启用
          if [ "${{ inputs.enable_bbr }}" = "true" ]; then
            echo "=== 验证 BBR 配置 ==="
            grep -i bbr out/.config || echo "BBR 未在最终配置中找到"
          fi

          # 编译内核（与你本地脚本完全一致的参数）
          make -j$(nproc) O=out WERROR=0 \
              KCFLAGS="-Wno-error=frame-larger-than=" \
              NM=$CLANG_PATH/llvm-nm \
              OBJCOPY=$CLANG_PATH/llvm-objcopy \
              LD=$CLANG_PATH/ld.lld \
              CROSS_COMPILE=$CLANG_PATH/aarch64-linux-gnu- \
              CROSS_COMPILE_ARM32=$GCC_ARM_PATH/arm-linux-androideabi- \
              CC=$CLANG_PATH/clang \
              AR=$CLANG_PATH/llvm-ar \
              OBJDUMP=$CLANG_PATH/llvm-objdump \
              STRIP=$CLANG_PATH/llvm-strip \
              2>&1 | tee out/error.log

          # 记录结束时间
          endtime=$(date +'%Y-%m-%d %H:%M:%S')
          echo "Build finished at: $endtime"

      - name: Check build results
        run: |
          cd $GITHUB_WORKSPACE/kernel/source/android_kernel_oneplus_sm8650
          echo "=== Build Results ==="
          if [ -f "out/arch/arm64/boot/Image" ]; then
            echo "✅ Kernel build successful!"
            ls -la out/arch/arm64/boot/
            echo "Image size: $(du -h out/arch/arm64/boot/Image)"
            
            # 检查是否有DTB文件
            if ls out/arch/arm64/boot/dts/*/*.dtb 2>/dev/null; then
              echo "DTB files found:"
              ls -la out/arch/arm64/boot/dts/*/*.dtb | head -5
            fi
          else
            echo "❌ Kernel build failed!"
            echo "=== Last 100 lines of error log ==="
            tail -100 out/error.log
            echo "=== Error summary ==="
            grep -i "error\|failed\|stop" out/error.log | tail -10
            exit 1
          fi

      - name: Prepare AnyKernel3 package
        run: |
          cd $GITHUB_WORKSPACE/kernel

          # 设置内核名称
          KERNEL_NAME="${{ inputs.kernel_name }}"
          if [ -z "$KERNEL_NAME" ]; then
            KERNEL_NAME="CustomKernel"
          fi

          # 获取内核版本信息
          cd source/android_kernel_oneplus_sm8650
          KERNEL_VERSION=$(make kernelversion 2>/dev/null || echo "unknown")
          BUILD_DATE=$(date +'%Y%m%d_%H%M')

          cd $GITHUB_WORKSPACE/kernel

          echo "=== 准备 AnyKernel3 打包 ==="
          echo "内核名称: $KERNEL_NAME"
          echo "内核版本: $KERNEL_VERSION"
          echo "构建日期: $BUILD_DATE"

          # 复制 AnyKernel3 模板到输出目录
          cp -r anykernel3/* output/

          # 复制内核文件
          cp source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/Image output/

          # 如果存在 Image.gz，也复制它
          if [ -f "source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/Image.gz" ]; then
            cp source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/Image.gz output/
          fi

          # 复制 DTB 文件（如果存在）
          if ls source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/dts/*/*.dtb 2>/dev/null; then
            mkdir -p output/dtbs
            cp source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/dts/*/*.dtb output/dtbs/
            echo "DTB files copied to dtbs/"
          fi

          # 修改 AnyKernel3 配置
          cd output

          # 备份原始 anykernel.sh
          cp anykernel.sh anykernel.sh.bak

          # 自定义 anykernel.sh 配置
          cat > anykernel.sh << 'EOF'
          # AnyKernel3 Ramdisk Mod Script
          # osm0sis @ xda-developers

          ## AnyKernel setup
          # begin properties
          properties() { '
          kernel.string=
          do.devicecheck=1
          do.modules=0
          do.systemless=1
          do.cleanup=1
          do.cleanuponabort=0
          device.name1=OnePlus12
          device.name2=OP594DL1
          device.name3=PJD110
          device.name4=
          device.name5=
          supported.versions=
          supported.patchlevels=
          '; } # end properties

          # shell variables
          block=/dev/block/bootdevice/by-name/boot;
          is_slot_device=1;
          ramdisk_compression=auto;
          patch_vbmeta_flag=auto;

          ## AnyKernel methods (DO NOT CHANGE)
          # import patching functions/variables - see for reference
          . tools/ak3-core.sh;

          ## AnyKernel file attributes
          # set permissions/ownership for included ramdisk files
          set_perm_recursive 0 0 755 644 $ramdisk/*;
          set_perm_recursive 0 0 750 750 $ramdisk/init* $ramdisk/sbin;

          ## AnyKernel install
          dump_boot;

          # begin ramdisk changes

          # end ramdisk changes

          write_boot;
          ## end install
          EOF

          # 创建更新信息文件
          cat > kernel_info.txt << EOF
          Kernel Name: $KERNEL_NAME
          Kernel Version: $KERNEL_VERSION
          Build Date: $BUILD_DATE
          BBR Enabled: ${{ inputs.enable_bbr }}
          Compiler: Clang 14.0.6
          Target Device: OnePlus 12 (SM8650)
          Architecture: ARM64
          EOF

          echo "=== AnyKernel3 准备完成 ==="
          ls -la ./

      - name: Create AnyKernel3 ZIP package
        run: |
          cd $GITHUB_WORKSPACE/kernel/output

          # 设置包名
          KERNEL_NAME="${{ inputs.kernel_name }}"
          if [ -z "$KERNEL_NAME" ]; then
            KERNEL_NAME="CustomKernel"
          fi

          BUILD_DATE=$(date +'%Y%m%d_%H%M')
          BBR_SUFFIX=""
          if [ "${{ inputs.enable_bbr }}" = "true" ]; then
            BBR_SUFFIX="_BBR"
          fi

          ZIP_NAME="${KERNEL_NAME}${BBR_SUFFIX}_${BUILD_DATE}.zip"

          echo "=== 创建 ZIP 包: $ZIP_NAME ==="

          # 创建 ZIP 包
          zip -r9 "$ZIP_NAME" * -x "*.bak"

          # 验证 ZIP 包
          if [ -f "$ZIP_NAME" ]; then
            echo "✅ ZIP 包创建成功!"
            echo "包名: $ZIP_NAME"
            echo "大小: $(du -h "$ZIP_NAME")"
            
            # 显示 ZIP 包内容
            echo "=== ZIP 包内容 ==="
            unzip -l "$ZIP_NAME" | head -20
          else
            echo "❌ ZIP 包创建失败!"
            exit 1
          fi

          # 保存包名供后续步骤使用
          echo "ZIP_NAME=$ZIP_NAME" >> $GITHUB_ENV

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: kernel-build-${{ github.run_number }}
          path: |
            kernel/source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/Image*
            kernel/source/android_kernel_oneplus_sm8650/out/arch/arm64/boot/dts/*/*.dtb
            kernel/source/android_kernel_oneplus_sm8650/out/error.log
            kernel/source/android_kernel_oneplus_sm8650/out/.config
            kernel/output/*.zip
            kernel/output/kernel_info.txt

      - name: Upload AnyKernel3 ZIP
        uses: actions/upload-artifact@v4
        if: success()
        with:
          name: ${{ env.ZIP_NAME }}
          path: kernel/output/${{ env.ZIP_NAME }}
          retention-days: 30