name: CI

on:
  push:
    branches: [main, experiment/*]
  pull_request:
    branches: [main]

jobs:
  test:
    name: Tests & Quality Checks
    runs-on: macos-15

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Full history for CodeScene

      - name: Setup pnpm
        uses: pnpm/action-setup@v4
        with:
          version: 10

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '22'
          cache: 'pnpm'

      - name: Setup Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy, llvm-tools-preview

      - name: Cache Rust dependencies
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            src-tauri/target
          key: ${{ runner.os }}-cargo-${{ hashFiles('src-tauri/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@cargo-llvm-cov

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # ── 0. Build check (catches type errors and bundler failures) ─────────
      - name: TypeScript type check
        run: pnpm exec tsc --noEmit

      - name: Vite build check
        run: pnpm build

      # ── 1. Tests ──────────────────────────────────────────────────────────
      - name: Run frontend tests
        run: pnpm test

      - name: Bundle MCP server resources (required by Tauri build)
        run: node scripts/bundle-mcp-server.mjs

      - name: Run Rust tests
        run: cargo test --manifest-path=src-tauri/Cargo.toml

      # ── 2. Coverage (enforced — fails build if thresholds not met) ────────
      - name: Frontend coverage (≥70% lines/functions/branches/statements)
        run: pnpm test:coverage
        # Thresholds configured in vite.config.ts — exits non-zero if coverage drops

      - name: Rust coverage (≥85% lines)
        run: |
          cargo llvm-cov \
            --manifest-path src-tauri/Cargo.toml \
            --ignore-filename-regex 'lib\.rs|main\.rs|menu\.rs' \
            --fail-under-lines 85
        # cargo-llvm-cov exits non-zero if line coverage drops below 85%
        # lib.rs/main.rs/menu.rs are Tauri boilerplate -- not meaningfully unit-testable.

      # ── 3. Code Health (CodeScene — Hotspot Code Health gate) ────────────
      # The webhook integration handles per-PR delta analysis (posts review
      # comments on PRs). This step enforces a minimum floor on the
      # project-wide Hotspot Code Health score (weighted avg of the most
      # frequently edited files — the ones that matter most).
      # Current baseline: 9.33 | Aspirational target: 9.5
      - name: Hotspot Code Health gate (≥9.2)
        env:
          CODESCENE_PAT: ${{ secrets.CODESCENE_PAT }}
          CODESCENE_PROJECT_ID: ${{ secrets.CODESCENE_PROJECT_ID }}
        run: |
          THRESHOLD=9.2
          SCORE=$(curl -sf \
            -H "Authorization: Bearer $CODESCENE_PAT" \
            -H "Accept: application/json" \
            "https://api.codescene.io/v2/projects/$CODESCENE_PROJECT_ID" \
            | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['analysis']['hotspot_code_health']['now'])")
          echo "Hotspot Code Health: $SCORE (threshold: $THRESHOLD)"
          python3 -c "
          score = float('$SCORE')
          threshold = float('$THRESHOLD')
          if score < threshold:
              print(f'❌ Hotspot Code Health {score:.2f} is below threshold {threshold}')
              exit(1)
          print(f'✅ Hotspot Code Health {score:.2f} ≥ {threshold}')
          "

      # ── 4. Documentation check (warning only — does not fail build) ───────
      - name: Check docs are updated
        continue-on-error: true
        run: |
          if git log -1 --pretty=%B | grep -i '\[skip docs\]' > /dev/null; then
            echo "⏭️  Documentation check skipped"
            exit 0
          fi
          if git diff --name-only origin/main | grep -E '^(src/|src-tauri/)' > /dev/null; then
            if ! git diff --name-only origin/main | grep -E '^docs/' > /dev/null; then
              echo "⚠️  Code files changed but docs/ not updated"
              git diff --name-only origin/main | grep -E '^(src/|src-tauri/)'
              echo "If this change affects architecture/abstractions/theme documented in docs/, update them."
              echo "To suppress: include [skip docs] in your commit message."
            fi
          fi
          echo "✅ Documentation check passed"

      # ── 5. Lint & format ──────────────────────────────────────────────────
      - name: Lint frontend
        run: pnpm lint

      - name: Clippy (Rust)
        run: cargo clippy --manifest-path=src-tauri/Cargo.toml -- -D warnings

      - name: Format check (Rust)
        run: cargo fmt --manifest-path=src-tauri/Cargo.toml -- --check