name: CI

on:
  pull_request:
    branches: [main, dev]

# Design notes:
# - Matrix parallelism cuts wall time from ~3-4min to ~60-90s (cache warm).
# - Each matrix leg restores the same cache; `Ensure deps` fills gaps on cache miss.
# - fail-fast: false so every failure is visible in one run (no re-pushing to see the next failure).
# - Test leg runs build:all inline because it needs dist/ artifacts; still parallel with other legs.

jobs:
  validate:
    runs-on: [self-hosted, linux, x64]
    strategy:
      fail-fast: false
      matrix:
        check:
          - { name: typecheck, cmd: 'bun run typecheck' }
          - { name: lint,      cmd: 'bun run lint' }
          - { name: format,    cmd: 'bun run format:check' }
          - { name: build,     cmd: 'bun run build:all' }
          - { name: test,      cmd: 'bun run build:all && bun run test:all' }
    name: ${{ matrix.check.name }}

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

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: '1.3.9'

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

      - name: Restore bun + node_modules cache
        uses: actions/cache@v4
        with:
          path: |
            ~/.bun/install/cache
            node_modules
            ui/node_modules
          key: ${{ runner.os }}-bun-${{ hashFiles('bun.lock', 'ui/bun.lock') }}
          restore-keys: |
            ${{ runner.os }}-bun-

      - name: Ensure dependencies
        run: |
          [ -d node_modules ] || bun install --frozen-lockfile
          [ -d ui/node_modules ] || (cd ui && bun install --frozen-lockfile)

      - name: Run ${{ matrix.check.name }}
        run: ${{ matrix.check.cmd }}