name: PR Check

on:
  pull_request:
    branches: [master]

jobs:
  lint-markdown:
    name: Markdown Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Run markdownlint-cli2
        uses: DavidAnson/markdownlint-cli2-action@v19
        with:
          globs: |
            **/*.md
            !.dev/**
            !docs/api/**
            !**/node_modules/**
            !**/bin/**
            !**/obj/**

  test:
    name: Build & Test
    needs: lint-markdown
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Check for src/ changes
        id: changes
        env:
          BASE_REF: ${{ github.base_ref }}
        run: |
          git fetch origin "$BASE_REF" --depth=1
          CHANGED=$(git diff --name-only "origin/$BASE_REF"...HEAD -- 'src/' | wc -l)
          if [ "$CHANGED" -gt 0 ]; then
            echo "src_changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "src_changed=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Setup .NET 10
        if: steps.changes.outputs.src_changed == 'true'
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '10.0.x'

      - name: Cache NuGet packages
        if: steps.changes.outputs.src_changed == 'true'
        uses: actions/cache@v4
        with:
          path: ~/.nuget/packages
          key: nuget-${{ runner.os }}-${{ hashFiles('src/**/*.csproj') }}
          restore-keys: nuget-${{ runner.os }}-

      - name: Restore dependencies
        if: steps.changes.outputs.src_changed == 'true'
        run: dotnet restore src/EchoHub.slnx

      - name: Build
        if: steps.changes.outputs.src_changed == 'true'
        run: dotnet build src/EchoHub.slnx --no-restore --configuration Release

      - name: Test
        if: steps.changes.outputs.src_changed == 'true'
        run: dotnet test src/EchoHub.slnx --no-build --configuration Release --verbosity normal

      - name: Skip notice
        if: steps.changes.outputs.src_changed == 'false'
        run: echo "No changes in src/ — skipping build and test"