# 功能开关状态管理示例
# 演示如何使用状态缓存来管理功能开关、配置参数等动态配置

name: Cache State - 功能开关管理

on:
  workflow_dispatch:
    inputs:
      feature_name:
        description: '功能名称'
        required: true
        default: 'new-ui'
      feature_enabled:
        description: '是否启用功能'
        required: false
        default: true
        type: boolean
      rollout_percentage:
        description: '灰度发布百分比 (0-100)'
        required: false
        default: '50'
      environment:
        description: '目标环境'
        required: false
        default: 'staging'
        type: choice
        options:
          - development
          - staging
          - production

jobs:
  manage-feature-flags:
    runs-on: ubuntu-latest
    outputs:
      feature-state: ${{ steps.feature-flag.outputs.state-value }}
      rollout-config: ${{ steps.rollout.outputs.state-value }}
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 获取或设置功能开关状态
        id: feature-flag
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'feature-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: ${{ github.event.inputs.feature_enabled }}
          default-value: 'false'
          cache-prefix: 'feature-flags'
          action: 'get-or-set'

      - name: 管理灰度发布配置
        id: rollout
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'rollout-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: ${{ github.event.inputs.rollout_percentage }}
          default-value: '0'
          cache-prefix: 'rollout-config'
          action: 'get-or-set'

      - name: 记录功能开关变更历史
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'feature-history-${{ github.event.inputs.feature_name }}'
          state-value: '${{ github.event.inputs.environment }}:${{ github.event.inputs.feature_enabled }}:${{ github.run_started_at }}'
          cache-prefix: 'feature-history'
          action: 'set'

      - name: 验证功能开关配置
        run: |
          FEATURE_ENABLED="${{ steps.feature-flag.outputs.state-value }}"
          ROLLOUT_PERCENT="${{ steps.rollout.outputs.state-value }}"
          
          echo "🎛️ 功能开关配置验证:"
          echo "  - 功能名称: ${{ github.event.inputs.feature_name }}"
          echo "  - 环境: ${{ github.event.inputs.environment }}"
          echo "  - 功能状态: ${FEATURE_ENABLED}"
          echo "  - 灰度百分比: ${ROLLOUT_PERCENT}%"
          echo "  - 缓存命中: ${{ steps.feature-flag.outputs.cache-hit }}"
          
          # 验证配置合理性
          if [[ "${FEATURE_ENABLED}" == "true" && "${ROLLOUT_PERCENT}" -gt 0 ]]; then
            echo "✅ 功能配置有效"
          elif [[ "${FEATURE_ENABLED}" == "false" ]]; then
            echo "ℹ️ 功能已禁用"
          else
            echo "⚠️ 功能配置可能需要检查"
          fi

  apply-feature-configuration:
    needs: manage-feature-flags
    runs-on: ubuntu-latest
    strategy:
      matrix:
        service: [api, frontend, mobile]
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 获取服务特定的功能配置
        id: service-config
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'service-config-${{ matrix.service }}-${{ github.event.inputs.environment }}'
          default-value: '{"features":{},"version":"1.0"}'
          action: 'get'
          cache-prefix: 'service-config'

      - name: 应用功能配置到服务
        run: |
          SERVICE="${{ matrix.service }}"
          FEATURE_NAME="${{ github.event.inputs.feature_name }}"
          FEATURE_ENABLED="${{ needs.manage-feature-flags.outputs.feature-state }}"
          ROLLOUT_PERCENT="${{ needs.manage-feature-flags.outputs.rollout-config }}"
          
          echo "🔧 为 ${SERVICE} 服务应用功能配置:"
          echo "  - 功能: ${FEATURE_NAME}"
          echo "  - 状态: ${FEATURE_ENABLED}"
          echo "  - 灰度: ${ROLLOUT_PERCENT}%"
          
          # 模拟配置应用过程
          case "${SERVICE}" in
            "api")
              echo "  📡 API服务配置已更新"
              ;;
            "frontend")
              echo "  🌐 前端服务配置已更新"
              ;;
            "mobile")
              echo "  📱 移动端配置已更新"
              ;;
          esac

      - name: 更新服务配置状态
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'service-config-applied-${{ matrix.service }}'
          state-value: '${{ github.event.inputs.feature_name }}:${{ needs.manage-feature-flags.outputs.feature-state }}'
          cache-prefix: 'service-status'
          action: 'set'

  monitor-feature-metrics:
    needs: [manage-feature-flags, apply-feature-configuration]
    runs-on: ubuntu-latest
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 初始化功能监控指标
        id: init-metrics
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'metrics-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          default-value: '{"users":0,"errors":0,"performance":100}'
          action: 'get'
          cache-prefix: 'feature-metrics'

      - name: 模拟收集功能使用指标
        run: |
          echo "📊 收集功能使用指标..."
          
          # 模拟指标收集
          USERS_COUNT=$((RANDOM % 1000 + 100))
          ERROR_COUNT=$((RANDOM % 10))
          PERFORMANCE_SCORE=$((RANDOM % 20 + 80))
          
          echo "  - 用户数: ${USERS_COUNT}"
          echo "  - 错误数: ${ERROR_COUNT}"
          echo "  - 性能分数: ${PERFORMANCE_SCORE}"
          
          # 保存到环境变量供后续步骤使用
          echo "users_count=${USERS_COUNT}" >> $GITHUB_ENV
          echo "error_count=${ERROR_COUNT}" >> $GITHUB_ENV
          echo "performance_score=${PERFORMANCE_SCORE}" >> $GITHUB_ENV

      - name: 更新功能监控指标
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'metrics-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: '{"users":${{ env.users_count }},"errors":${{ env.error_count }},"performance":${{ env.performance_score }}}'
          cache-prefix: 'feature-metrics'
          action: 'set'

      - name: 分析指标异常
        run: |
          ERROR_COUNT=${{ env.error_count }}
          PERFORMANCE_SCORE=${{ env.performance_score }}
          
          echo "🔍 指标异常分析:"
          
          if [[ ${ERROR_COUNT} -gt 5 ]]; then
            echo "⚠️ 错误率偏高，可能需要回滚功能"
            echo "alert=high_error_rate" >> $GITHUB_ENV
          elif [[ ${PERFORMANCE_SCORE} -lt 70 ]]; then
            echo "⚠️ 性能下降，需要关注"
            echo "alert=performance_degradation" >> $GITHUB_ENV
          else
            echo "✅ 指标正常"
            echo "alert=none" >> $GITHUB_ENV
          fi

      - name: 记录异常告警
        if: env.alert != 'none'
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'alert-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: '${{ env.alert }}:${{ github.run_started_at }}'
          cache-prefix: 'alerts'
          action: 'set'

  feature-rollback-if-needed:
    needs: [manage-feature-flags, monitor-feature-metrics]
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 检查是否需要回滚
        id: check-rollback
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'alert-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          default-value: 'none'
          action: 'get'
          cache-prefix: 'alerts'

      - name: 执行自动回滚
        if: contains(steps.check-rollback.outputs.state-value, 'high_error_rate')
        run: |
          echo "🔄 检测到高错误率，执行自动回滚..."
          echo "功能: ${{ github.event.inputs.feature_name }}"
          echo "环境: ${{ github.event.inputs.environment }}"

      - name: 禁用功能开关
        if: contains(steps.check-rollback.outputs.state-value, 'high_error_rate')
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'feature-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: 'false'
          cache-prefix: 'feature-flags'
          action: 'set'

      - name: 记录回滚操作
        if: contains(steps.check-rollback.outputs.state-value, 'high_error_rate')
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'rollback-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          state-value: 'auto-rollback:${{ github.run_started_at }}'
          cache-prefix: 'rollback-history'
          action: 'set'

  generate-feature-report:
    needs: [manage-feature-flags, apply-feature-configuration, monitor-feature-metrics, feature-rollback-if-needed]
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 收集所有功能状态
        run: |
          echo "📋 功能开关管理报告"
          echo "===================="
          echo "时间: $(date)"
          echo "功能: ${{ github.event.inputs.feature_name }}"
          echo "环境: ${{ github.event.inputs.environment }}"
          echo ""

      - name: 获取最终功能状态
        id: final-state
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'feature-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          action: 'get'
          cache-prefix: 'feature-flags'

      - name: 获取监控指标
        id: final-metrics
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'metrics-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          action: 'get'
          cache-prefix: 'feature-metrics'

      - name: 检查回滚历史
        id: rollback-check
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'rollback-${{ github.event.inputs.feature_name }}-${{ github.event.inputs.environment }}'
          default-value: 'none'
          action: 'get'
          cache-prefix: 'rollback-history'

      - name: 生成最终报告
        run: |
          echo "✅ 功能状态管理完成"
          echo ""
          echo "📊 最终状态:"
          echo "  - 功能状态: ${{ steps.final-state.outputs.state-value }}"
          echo "  - 监控指标: ${{ steps.final-metrics.outputs.state-value }}"
          echo "  - 回滚历史: ${{ steps.rollback-check.outputs.state-value }}"
          echo ""
          echo "🎯 下次运行时，这些状态将被保留并可以继续使用。"

  cleanup-old-feature-states:
    runs-on: ubuntu-latest
    if: github.event.inputs.environment == 'development'  # 只在开发环境清理
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 清理过期的功能状态
        run: |
          echo "🧹 清理开发环境的过期功能状态..."
          # 这里可以实现清理逻辑
          # 例如，清理超过一定时间的开发环境功能开关

      - name: 重置开发环境告警
        uses: .actions/xgj/cache-state@v1
        with:
          state-key: 'dev-alerts-cleared'
          state-value: '${{ github.run_started_at }}'
          cache-prefix: 'cleanup'
          action: 'set'