name: Cleanup Old Artifacts

on:
  schedule:
    # Run daily at 03:00 UTC (after database build)
    - cron: '0 3 * * *'
  workflow_dispatch:  # Allow manual triggering
    inputs:
      retention_days:
        description: 'Keep artifacts newer than X days'
        required: false
        default: '30'
        type: string
      dry_run:
        description: 'Dry run (list only, do not delete)'
        required: false
        default: false
        type: boolean

permissions:
  actions: write
  contents: read

jobs:
  cleanup:
    runs-on: ubuntu-latest
    timeout-minutes: 30

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup GitHub CLI
        run: |
          # GitHub CLI is pre-installed on ubuntu-latest
          gh --version

      - name: List and cleanup old artifacts
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          # Configuration
          RETENTION_DAYS="${{ github.event.inputs.retention_days || '30' }}"
          DRY_RUN="${{ github.event.inputs.dry_run || 'false' }}"
          CUTOFF_DATE=$(date -u -d "$RETENTION_DAYS days ago" +%s)

          echo "🧹 Artifact Cleanup Configuration"
          echo "=================================="
          echo "Retention days: $RETENTION_DAYS"
          echo "Cutoff date: $(date -u -d "@$CUTOFF_DATE" '+%Y-%m-%d %H:%M:%S UTC')"
          echo "Dry run: $DRY_RUN"
          echo ""

          # Get all artifacts
          echo "📦 Fetching artifacts..."
          ARTIFACTS=$(gh api \
            -H "Accept: application/vnd.github+json" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            "/repos/${{ github.repository }}/actions/artifacts?per_page=100" \
            | jq -r '.artifacts[]')

          if [ -z "$ARTIFACTS" ]; then
            echo "No artifacts found"
            exit 0
          fi

          # Initialize counters
          TOTAL_COUNT=0
          DELETE_COUNT=0
          KEEP_COUNT=0
          SPACE_FREED=0

          # Create summary arrays
          declare -a TO_DELETE
          declare -a TO_KEEP

          # Process each artifact
          while IFS= read -r artifact; do
            ID=$(echo "$artifact" | jq -r '.id')
            NAME=$(echo "$artifact" | jq -r '.name')
            SIZE=$(echo "$artifact" | jq -r '.size_in_bytes')
            CREATED=$(echo "$artifact" | jq -r '.created_at')
            EXPIRED=$(echo "$artifact" | jq -r '.expired')

            # Convert created_at to timestamp
            CREATED_TS=$(date -u -d "$CREATED" +%s)

            TOTAL_COUNT=$((TOTAL_COUNT + 1))

            # Check if artifact should be deleted
            if [ "$EXPIRED" = "true" ] || [ $CREATED_TS -lt $CUTOFF_DATE ]; then
              DELETE_COUNT=$((DELETE_COUNT + 1))
              SPACE_FREED=$((SPACE_FREED + SIZE))

              SIZE_MB=$(echo "scale=2; $SIZE / 1024 / 1024" | bc)
              AGE_DAYS=$(echo "($CUTOFF_DATE - $CREATED_TS) / 86400" | bc)

              TO_DELETE+=("| $NAME | $SIZE_MB MB | $(date -u -d "$CREATED" '+%Y-%m-%d') | $AGE_DAYS days old |")

              if [ "$DRY_RUN" = "false" ]; then
                echo "🗑️  Deleting: $NAME (ID: $ID, Size: $SIZE_MB MB, Age: $AGE_DAYS days)"
                gh api \
                  --method DELETE \
                  -H "Accept: application/vnd.github+json" \
                  -H "X-GitHub-Api-Version: 2022-11-28" \
                  "/repos/${{ github.repository }}/actions/artifacts/$ID" \
                  && echo "   ✓ Deleted" || echo "   ✗ Failed to delete"
              else
                echo "🔍 Would delete: $NAME (ID: $ID, Size: $SIZE_MB MB, Age: $AGE_DAYS days)"
              fi
            else
              KEEP_COUNT=$((KEEP_COUNT + 1))

              SIZE_MB=$(echo "scale=2; $SIZE / 1024 / 1024" | bc)
              AGE_DAYS=$(echo "($(date +%s) - $CREATED_TS) / 86400" | bc)

              TO_KEEP+=("| $NAME | $SIZE_MB MB | $(date -u -d "$CREATED" '+%Y-%m-%d') | $AGE_DAYS days old |")
            fi
          done < <(gh api \
            -H "Accept: application/vnd.github+json" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            "/repos/${{ github.repository }}/actions/artifacts?per_page=100" \
            | jq -c '.artifacts[]')

          # Calculate space freed in MB
          SPACE_FREED_MB=$(echo "scale=2; $SPACE_FREED / 1024 / 1024" | bc)

          echo ""
          echo "📊 Cleanup Summary"
          echo "=================="
          echo "Total artifacts: $TOTAL_COUNT"
          echo "Deleted/Would delete: $DELETE_COUNT"
          echo "Kept: $KEEP_COUNT"
          echo "Space freed: $SPACE_FREED_MB MB"

          # Create GitHub Actions summary
          cat >> $GITHUB_STEP_SUMMARY <<EOF
          # 🧹 Artifact Cleanup Report

          ## Configuration

          - **Retention Period:** $RETENTION_DAYS days
          - **Cutoff Date:** $(date -u -d "@$CUTOFF_DATE" '+%Y-%m-%d %H:%M:%S UTC')
          - **Mode:** $([ "$DRY_RUN" = "true" ] && echo "🔍 Dry Run" || echo "🗑️ Delete")

          ## Summary

          | Metric | Value |
          |--------|-------|
          | 📦 Total Artifacts | $TOTAL_COUNT |
          | 🗑️ Deleted | $DELETE_COUNT |
          | ✅ Kept | $KEEP_COUNT |
          | 💾 Space Freed | $SPACE_FREED_MB MB |

          EOF

          # Add deleted artifacts table if any
          if [ $DELETE_COUNT -gt 0 ]; then
            cat >> $GITHUB_STEP_SUMMARY <<EOF
          ## 🗑️ Deleted Artifacts

          | Name | Size | Created | Age |
          |------|------|---------|-----|
          EOF
            printf '%s\n' "${TO_DELETE[@]}" >> $GITHUB_STEP_SUMMARY
          fi

          # Add kept artifacts table if any
          if [ $KEEP_COUNT -gt 0 ]; then
            cat >> $GITHUB_STEP_SUMMARY <<EOF

          ## ✅ Kept Artifacts (Recent)

          | Name | Size | Created | Age |
          |------|------|---------|-----|
          EOF
            # Show only first 10 kept artifacts
            printf '%s\n' "${TO_KEEP[@]:0:10}" >> $GITHUB_STEP_SUMMARY

            if [ $KEEP_COUNT -gt 10 ]; then
              echo "" >> $GITHUB_STEP_SUMMARY
              echo "*...and $((KEEP_COUNT - 10)) more*" >> $GITHUB_STEP_SUMMARY
            fi
          fi

          cat >> $GITHUB_STEP_SUMMARY <<EOF

          ## 📋 Next Scheduled Run

          This workflow runs daily at 03:00 UTC to maintain artifact storage.

          **Manual trigger:** You can also run this workflow manually from the Actions tab with custom retention settings.
          EOF

      - name: Cleanup workflow runs
        if: github.event.inputs.dry_run != 'true'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          echo ""
          echo "🧹 Cleaning up old workflow runs..."

          # Keep only last 50 workflow runs
          RUNS_TO_DELETE=$(gh api \
            -H "Accept: application/vnd.github+json" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            "/repos/${{ github.repository }}/actions/runs?per_page=100" \
            | jq -r '.workflow_runs[50:] | .[].id')

          if [ -z "$RUNS_TO_DELETE" ]; then
            echo "No old workflow runs to delete"
          else
            DELETE_COUNT=0
            for RUN_ID in $RUNS_TO_DELETE; do
              # Only delete runs older than 30 days
              RUN_DATE=$(gh api \
                -H "Accept: application/vnd.github+json" \
                -H "X-GitHub-Api-Version: 2022-11-28" \
                "/repos/${{ github.repository }}/actions/runs/$RUN_ID" \
                | jq -r '.created_at')

              RUN_TS=$(date -u -d "$RUN_DATE" +%s)
              CUTOFF=$(date -u -d "30 days ago" +%s)

              if [ $RUN_TS -lt $CUTOFF ]; then
                echo "Deleting workflow run: $RUN_ID"
                gh api \
                  --method DELETE \
                  -H "Accept: application/vnd.github+json" \
                  -H "X-GitHub-Api-Version: 2022-11-28" \
                  "/repos/${{ github.repository }}/actions/runs/$RUN_ID" \
                  && DELETE_COUNT=$((DELETE_COUNT + 1)) || echo "Failed to delete run $RUN_ID"
              fi
            done

            echo "Deleted $DELETE_COUNT old workflow runs"
          fi

      - name: Report failures
        if: failure()
        run: |
          cat >> $GITHUB_STEP_SUMMARY <<EOF
          # ❌ Cleanup Failed

          The artifact cleanup workflow encountered an error.

          Please check the logs for details.
          EOF