name: Android Release Build

on:
  push:
    tags:
      - 'v*'  # 推送 v1.0.0 等标签时自动触发
  workflow_dispatch:  # 支持手动触发
    inputs:
      version_name:
        description: '版本名（如 1.0.1），留空则使用 build.gradle.kts 中的默认值'
        required: false
        type: string

env:
  APP_NAME: 岁月时书

jobs:
  build-release-apk:
    name: Build Release APK
    runs-on: ubuntu-latest
    permissions:
      contents: write  # 需要 write 权限以创建 Release

    steps:
      # -----------------------------------------------------------------------
      # 1. 检出代码
      # -----------------------------------------------------------------------
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # 完整历史，用于生成 Release Notes

      # -----------------------------------------------------------------------
      # 2. 确定版本号
      # -----------------------------------------------------------------------
      - name: Determine version
        id: version
        run: |
          if [ "${{ github.event_name }}" = "push" ] && [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            # Tag 触发：从 tag 名提取版本号（去掉 v 前缀）
            VERSION_NAME="${GITHUB_REF#refs/tags/v}"
            TAG_NAME="${GITHUB_REF#refs/tags/}"
          elif [ -n "${{ github.event.inputs.version_name }}" ]; then
            # 手动触发且提供了版本号
            VERSION_NAME="${{ github.event.inputs.version_name }}"
            TAG_NAME="v${VERSION_NAME}"
          else
            # 手动触发但未提供版本号，从 build.gradle.kts 读取
            VERSION_NAME=$(grep 'versionName' app-android/app/build.gradle.kts | head -1 | sed 's/.*"\(.*\)".*/\1/')
            TAG_NAME="v${VERSION_NAME}"
          fi

          # versionCode 使用 GitHub Run Number 自增
          VERSION_CODE="${GITHUB_RUN_NUMBER}"

          echo "version_name=${VERSION_NAME}" >> $GITHUB_OUTPUT
          echo "version_code=${VERSION_CODE}" >> $GITHUB_OUTPUT
          echo "tag_name=${TAG_NAME}" >> $GITHUB_OUTPUT
          echo "apk_name=${APP_NAME}_v${VERSION_NAME}_release.apk" >> $GITHUB_OUTPUT

          echo "版本名: ${VERSION_NAME}"
          echo "版本号: ${VERSION_CODE}"
          echo "Tag: ${TAG_NAME}"

      # -----------------------------------------------------------------------
      # 3. 设置 JDK
      # -----------------------------------------------------------------------
      - name: Set up JDK 17
        uses: actions/setup-java@v4
        with:
          java-version: '17'
          distribution: 'temurin'

      # -----------------------------------------------------------------------
      # 4. 设置 Gradle 缓存
      # -----------------------------------------------------------------------
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v4

      # -----------------------------------------------------------------------
      # 5. 解码签名文件
      # -----------------------------------------------------------------------
      - name: Decode keystore
        working-directory: app-android
        run: |
          echo "解码 keystore 文件..."
          echo "${{ secrets.ANDROID_KEYSTORE_BASE64 }}" | base64 --decode > release-keystore.jks

          echo "生成 keystore.properties..."
          cat > keystore.properties <<EOF
          storeFile=../release-keystore.jks
          storePassword=${{ secrets.ANDROID_STORE_PASSWORD }}
          keyAlias=${{ secrets.ANDROID_KEY_ALIAS }}
          keyPassword=${{ secrets.ANDROID_KEY_PASSWORD }}
          EOF

          # 去除每行开头的空格（heredoc 缩进导致）
          sed -i 's/^[[:space:]]*//' keystore.properties

          echo "签名配置就绪"

      # -----------------------------------------------------------------------
      # 6. 覆盖版本号（如果从 Tag 或手动输入获取）
      # -----------------------------------------------------------------------
      - name: Update version in build.gradle.kts
        working-directory: app-android
        run: |
          VERSION_NAME="${{ steps.version.outputs.version_name }}"
          VERSION_CODE="${{ steps.version.outputs.version_code }}"

          echo "更新版本: versionName=${VERSION_NAME}, versionCode=${VERSION_CODE}"

          sed -i "s/versionCode = [0-9]*/versionCode = ${VERSION_CODE}/" app/build.gradle.kts
          sed -i "s/versionName = \"[^\"]*\"/versionName = \"${VERSION_NAME}\"/" app/build.gradle.kts

          echo "验证更新后的版本信息:"
          grep -E 'versionCode|versionName' app/build.gradle.kts

      # -----------------------------------------------------------------------
      # 7. 构建 Release APK
      # -----------------------------------------------------------------------
      - name: Build Release APK
        working-directory: app-android
        run: |
          echo "开始构建 Release APK..."
          chmod +x gradlew
          ./gradlew assembleRelease --no-daemon

      # -----------------------------------------------------------------------
      # 8. 查找并重命名 APK
      # -----------------------------------------------------------------------
      - name: Locate APK
        id: apk
        working-directory: app-android
        run: |
          APK_PATH=$(find app/build/outputs/apk/release -name "*.apk" | head -1)
          if [ -z "$APK_PATH" ]; then
            echo "错误：未找到 Release APK"
            exit 1
          fi

          FINAL_NAME="${{ steps.version.outputs.apk_name }}"
          FINAL_PATH="app/build/outputs/apk/release/${FINAL_NAME}"
          mv "$APK_PATH" "$FINAL_PATH"

          echo "APK 路径: ${FINAL_PATH}"
          echo "APK 大小: $(du -h "$FINAL_PATH" | cut -f1)"

          echo "apk_path=${FINAL_PATH}" >> $GITHUB_OUTPUT
          echo "apk_name=${FINAL_NAME}" >> $GITHUB_OUTPUT

      # -----------------------------------------------------------------------
      # 9. 上传 APK 为 Artifact（始终执行，手动触发时也可下载）
      # -----------------------------------------------------------------------
      - name: Upload APK artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ steps.apk.outputs.apk_name }}
          path: app-android/${{ steps.apk.outputs.apk_path }}
          retention-days: 30

      # -----------------------------------------------------------------------
      # 10. 创建 GitHub Release（仅 Tag 触发时执行）
      # -----------------------------------------------------------------------
      - name: Generate Release Notes
        id: release_notes
        if: startsWith(github.ref, 'refs/tags/v')
        run: |
          TAG_NAME="${{ steps.version.outputs.tag_name }}"

          # 获取上一个 tag
          PREV_TAG=$(git tag --sort=-creatordate | grep '^v' | sed -n '2p')

          if [ -n "$PREV_TAG" ]; then
            echo "生成 ${PREV_TAG}..${TAG_NAME} 之间的变更记录"
            CHANGES=$(git log "${PREV_TAG}..HEAD" --pretty=format:"- %s (%h)" --no-merges)
          else
            echo "首次发布，生成全部提交记录"
            CHANGES=$(git log --pretty=format:"- %s (%h)" --no-merges -20)
          fi

          # 写入多行输出
          {
            echo "notes<<EOF"
            echo "## ${APP_NAME} ${TAG_NAME}"
            echo ""
            echo "### 更新内容"
            echo ""
            echo "${CHANGES}"
            echo ""
            echo "---"
            echo "构建编号: #${GITHUB_RUN_NUMBER}"
            echo "EOF"
          } >> $GITHUB_OUTPUT

      - name: Create GitHub Release
        if: startsWith(github.ref, 'refs/tags/v')
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.tag_name }}
          name: "${{ env.APP_NAME }} ${{ steps.version.outputs.tag_name }}"
          body: ${{ steps.release_notes.outputs.notes }}
          draft: false
          prerelease: false
          files: app-android/${{ steps.apk.outputs.apk_path }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}