name: CI

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

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

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

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

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

      - 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 \
            --fail-under-lines 85
        # cargo-llvm-cov exits non-zero if line coverage drops below 85%

      # ── 3. Code Health (CodeScene) ───────────────────────────────────────
      # CodeScene PR reviews are handled via webhook integration configured
      # in the CodeScene dashboard — not via a GitHub Action.
      # No CI step needed here; CodeScene posts review comments directly on PRs
      # and can block merges via its own GitHub App status check.

      # ── 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
        continue-on-error: true
        # NOTE: codebase has ~60 pre-existing lint errors (no-explicit-any, react hooks, etc.)
        # tracked in Todoist — fix before removing continue-on-error

      - 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