name: CI

on:
  push:
    branches: ["**"]
  pull_request:
    branches: ["**"]

env:
  MIX_ENV: test
  MIX_OS_DEPS_COMPILE_PARTITION_COUNT: 8

permissions:
  contents: read

jobs:
  test:
    name: ${{ matrix.name }}
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: Test (OTP 27.2 / Elixir 1.18.2)
            otp: "27.2"
            elixir: "1.18.2"
            main: false
          - name: Test (OTP 28.4 / Elixir 1.19.4 + E2E)
            otp: "28.4"
            elixir: "1.19.4"
            main: true

    services:
      postgres:
        image: postgres:16-alpine
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: app_test
        ports:
          - 5432:5432
        options: >-
          --health-cmd "pg_isready -U postgres"
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    env:
      PGHOST: localhost
      PGPORT: 5432
      PGUSER: postgres
      PGPASSWORD: postgres
      PGDATABASE: app_test

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Set up Elixir + OTP
        uses: erlef/setup-beam@v1
        with:
          otp-version: ${{ matrix.otp }}
          elixir-version: ${{ matrix.elixir }}

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 24

      # Cache deps/ directory — keyed on mix.lock
      - name: Cache Mix deps
        uses: actions/cache@v4
        id: deps-cache
        with:
          path: deps
          key: ${{ runner.os }}-mix-deps-${{ hashFiles('mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-deps-

      # Cache _build/ — keyed on mix.lock + OTP/Elixir versions
      - name: Cache _build
        uses: actions/cache@v4
        with:
          path: _build
          key: ${{ runner.os }}-mix-build-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('mix.lock') }}
          restore-keys: |
            ${{ runner.os }}-mix-build-${{ matrix.otp }}-${{ matrix.elixir }}-

      - name: Install Mix dependencies
        if: steps.deps-cache.outputs.cache-hit != 'true'
        run: mix deps.get

      - name: Compile (warnings as errors)
        if: ${{ matrix.main }}
        run: mix compile --warnings-as-errors

      - name: Check formatting
        if: ${{ matrix.main }}
        run: mix format --check-formatted

      - name: Credo
        if: ${{ matrix.main }}
        run: mix credo --strict --all

      - name: Check for unused locked deps
        if: ${{ matrix.main }}
        run: |
          mix deps.unlock --unused
          git diff --exit-code -- mix.lock

      - name: Run tests
        run: mix test --color

      - name: Run Node Sync E2E tests
        if: ${{ matrix.main }}
        run: mix test.node_sync_e2e

      - name: Run Marmot E2E tests
        run: mix test.marmot_e2e