name: 'Cleanup Old Releases'
description: '自動清理舊版本的 releases，保留指定數量的最新版本'
inputs:
  gitea-server:
    description: 'Gitea 伺服器 URL'
    required: true
  repository:
    description: '儲存庫名稱 (格式: owner/repo)'
    required: true
  token:
    description: 'Gitea API Token'
    required: true
  keep-count:
    description: '保留的最新版本數量'
    required: false
    default: '2'
  dry-run:
    description: '是否為模擬執行 (只顯示會刪除的版本，不實際刪除)'
    required: false
    default: 'false'
outputs:
  deleted-count:
    description: '已刪除的版本數量'
    value: ${{ steps.cleanup.outputs.deleted-count }}
  deleted-releases:
    description: '已刪除的版本列表 (JSON 格式)'
    value: ${{ steps.cleanup.outputs.deleted-releases }}
runs:
  using: 'composite'
  steps:
    - name: 清理舊版本
      id: cleanup
      shell: bash
      run: |
        echo "開始清理舊版本，保留最新 ${{ inputs.keep-count }} 個版本"
        
        # 獲取所有 releases 並按創建時間排序
        RELEASES_JSON=$(curl -s "${{ inputs.gitea-server }}/api/v1/repos/${{ inputs.repository }}/releases" \
          -H "Authorization: token ${{ inputs.token }}" \
          -H "Accept: application/json")
        
        # 檢查是否成功獲取 releases
        if [ $? -ne 0 ] || [ -z "$RELEASES_JSON" ]; then
          echo "錯誤：無法獲取 releases 列表"
          exit 1
        fi
        
        # 計算總數量
        TOTAL_COUNT=$(echo "$RELEASES_JSON" | jq 'length')
        echo "目前總共有 $TOTAL_COUNT 個 releases"
        
        # 如果總數量小於等於保留數量，則無需清理
        if [ $TOTAL_COUNT -le ${{ inputs.keep-count }} ]; then
          echo "releases 數量 ($TOTAL_COUNT) 未超過保留數量 (${{ inputs.keep-count }})，無需清理"
          echo "deleted-count=0" >> $GITHUB_OUTPUT
          echo "deleted-releases=[]" >> $GITHUB_OUTPUT
          exit 0
        fi
        
        # 計算需要刪除的數量
        DELETE_COUNT=$((TOTAL_COUNT - ${{ inputs.keep-count }}))
        echo "需要刪除 $DELETE_COUNT 個舊版本"
        
        # 獲取要刪除的 releases (跳過前 keep-count 個)
        TO_DELETE=$(echo "$RELEASES_JSON" | jq -r ".[${{ inputs.keep-count }}:] | .[] | {id: .id, tag: .tag_name, name: .name}")
        
        # 初始化刪除計數器和列表
        DELETED_COUNT=0
        DELETED_LIST="[]"
        
        # 處理每個要刪除的 release
        echo "$TO_DELETE" | jq -c '.' | while read -r release; do
          if [ -z "$release" ] || [ "$release" = "null" ]; then
            continue
          fi
          
          RELEASE_ID=$(echo "$release" | jq -r '.id')
          RELEASE_TAG=$(echo "$release" | jq -r '.tag')
          RELEASE_NAME=$(echo "$release" | jq -r '.name')
          
          if [ -z "$RELEASE_ID" ] || [ "$RELEASE_ID" = "null" ]; then
            continue
          fi
          
          echo "準備刪除: ID=$RELEASE_ID, Tag=$RELEASE_TAG, Name=$RELEASE_NAME"
          
          if [ "${{ inputs.dry-run }}" = "true" ]; then
            echo "🔍 [模擬執行] 會刪除 release: $RELEASE_TAG ($RELEASE_NAME)"
            DELETED_COUNT=$((DELETED_COUNT + 1))
          else
            # 實際刪除
            DELETE_RESPONSE=$(curl -s -w "HTTP_STATUS:%{http_code}" \
              -X DELETE "${{ inputs.gitea-server }}/api/v1/repos/${{ inputs.repository }}/releases/$RELEASE_ID" \
              -H "Authorization: token ${{ inputs.token }}")
            
            HTTP_STATUS=$(echo "$DELETE_RESPONSE" | grep -o "HTTP_STATUS:[0-9]*" | cut -d: -f2)
            
            if [ "$HTTP_STATUS" = "204" ] || [ "$HTTP_STATUS" = "200" ]; then
              echo "✅ 成功刪除 release: $RELEASE_TAG ($RELEASE_NAME)"
              DELETED_COUNT=$((DELETED_COUNT + 1))
              
              # 更新已刪除列表
              DELETED_LIST=$(echo "$DELETED_LIST" | jq ". + [{\"id\": \"$RELEASE_ID\", \"tag\": \"$RELEASE_TAG\", \"name\": \"$RELEASE_NAME\"}]")
            else
              echo "❌ 刪除失敗 release: $RELEASE_TAG ($RELEASE_NAME), HTTP狀態: $HTTP_STATUS"
            fi
          fi
        done
        
        # 由於 while 迴圈在子 shell 中執行，需要重新計算
        if [ "${{ inputs.dry-run }}" = "true" ]; then
          FINAL_DELETE_COUNT=$(echo "$TO_DELETE" | jq -s 'length')
          echo "deleted-count=$FINAL_DELETE_COUNT" >> $GITHUB_OUTPUT
          echo "deleted-releases=[]" >> $GITHUB_OUTPUT
          echo "🔍 [模擬執行] 總共會刪除 $FINAL_DELETE_COUNT 個版本"
        else
          # 重新獲取並計算實際刪除的數量
          NEW_RELEASES_JSON=$(curl -s "${{ inputs.gitea-server }}/api/v1/repos/${{ inputs.repository }}/releases" \
            -H "Authorization: token ${{ inputs.token }}" \
            -H "Accept: application/json")
          NEW_TOTAL_COUNT=$(echo "$NEW_RELEASES_JSON" | jq 'length')
          ACTUAL_DELETED=$((TOTAL_COUNT - NEW_TOTAL_COUNT))
          
          echo "deleted-count=$ACTUAL_DELETED" >> $GITHUB_OUTPUT
          echo "deleted-releases=$DELETED_LIST" >> $GITHUB_OUTPUT
          echo "✅ 清理完成，實際刪除了 $ACTUAL_DELETED 個版本"
        fi