name: Metrics Collection

on:
  schedule:
    - cron: '0 0 * * 1'  # Weekly on Monday at midnight
  workflow_dispatch:
  push:
    branches: [main, master]
    paths:
      - 'src/**'
      - 'Cargo.toml'
      - '.github/workflows/metrics.yml'

env:
  CARGO_TERM_COLOR: always

jobs:
  collect-metrics:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: Swatinem/rust-cache@v2
      
      - name: Install Rust with tools
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy
      

      
      - name: Generate test coverage
        run: |
          cargo install cargo-tarpaulin
          cargo tarpaulin --out Html --out Lcov --output-dir ./coverage
      
      - name: Upload coverage report
        uses: actions/upload-artifact@v4
        with:
          name: coverage-report
          path: ./coverage
          retention-days: 30
      
      - name: Count lines of code
        run: |
          cargo install tokei
          tokei --output json > loc.json
          echo "Lines of code:"
          tokei --type=Rust
      
      - name: Upload LOC metrics
        uses: actions/upload-artifact@v4
        with:
          name: loc-metrics
          path: loc.json
          retention-days: 30
      
      - name: Check compile times
        run: |
          echo "=== Compilation Metrics ==="
          echo "Note: For accurate compile times, run: cargo clean && cargo build --timings"
          echo ""
          echo "To optimize compile times:"
          echo "1. Check for large dependencies with: cargo tree --depth 1"
          echo "2. Consider feature flag optimization"
          echo "3. Review workspace structure"
      
      - name: Dependency analysis
        run: |
          cargo install cargo-depgraph
          cargo depgraph --all-features --dedup-transitive --format dot > deps.dot
          echo "Dependency graph generated: deps.dot"
          echo "Total dependencies: $(cargo tree --depth 0 | wc -l)"
      
      - name: Upload dependency graph
        uses: actions/upload-artifact@v4
        with:
          name: dependency-graph
          path: deps.dot
          retention-days: 30
      
      - name: Metrics summary
        run: |
          echo "=== Build Metrics Summary ==="
          echo ""
          echo "📊 Coverage: HTML and Lcov reports generated"
          echo "📈 LOC: Lines of code counted and saved"
          echo "🔗 Dependencies: Graph visualization available"
          echo ""
          echo "Artifacts available for 30 days:"
          echo "  - coverage-report/"
          echo "  - loc-metrics/loc.json"
          echo "  - dependency-graph/deps.dot"
          echo ""
          echo "Next steps:"
          echo "1. Review coverage reports to identify untested code"
          echo "2. Monitor LOC growth over time"
          echo "3. Analyze dependency graph for optimization opportunities"