name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  schedule:
    - cron: '0 0 * * 0'  # Weekly security audit

env:
  RUST_BACKTRACE: 1

jobs:
  # Comprehensive testing on Linux (stable, beta, nightly)
  test-linux:
    name: Test (${{ matrix.rust }}, Linux)
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        rust:
          - stable
          - beta
          - nightly
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}

      - name: Install nextest
        uses: taiki-e/install-action@nextest

      - name: Test (all features)
        run: cargo nextest run --no-fail-fast --all-features

      - name: Test (no default features)
        run: cargo nextest run --no-fail-fast --no-default-features

      - name: Test (std only)
        run: cargo nextest run --no-fail-fast --no-default-features --features std

      - name: Test (with tracing)
        run: cargo nextest run --no-fail-fast --features std,tracing

  # Cross-platform smoke tests (basic test to catch platform-specific issues)
  test-cross-platform:
    name: Test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [macos-latest, windows-latest]
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      - name: Install nextest
        uses: taiki-e/install-action@nextest

      # Just run basic tests with all features
      - name: Test (all features)
        run: cargo nextest run --no-fail-fast --all-features

  # Code quality checks
  fmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt
      - run: cargo fmt --all -- --check

  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
      - run: cargo clippy --all-features -- -D warnings

  # MSRV verification
  msrv:
    name: MSRV
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install cargo-msrv
        uses: taiki-e/install-action@v2
        with:
          tool: cargo-msrv
      - name: Verify MSRV
        run: cargo msrv verify

  # Documentation
  doc:
    name: Documentation
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - run: cargo doc --all-features --no-deps
      - run: cargo test --doc

  # Code coverage
  coverage:
    name: Coverage
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@v2
        with:
          tool: cargo-llvm-cov

      - name: Install nextest
        uses: taiki-e/install-action@nextest

      - name: Generate coverage
        run: cargo llvm-cov nextest --all-features --lcov --output-path lcov.info

      - name: Upload coverage
        uses: codecov/codecov-action@v3
        with:
          files: lcov.info

  # Security audit
  audit:
    name: Security Audit
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: rustsec/audit-check@v1
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

  # Fuzz testing (short runs to catch obvious issues)
  fuzz:
    name: Fuzz Testing
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@nightly

      - name: Install cargo-fuzz
        run: cargo install cargo-fuzz

      - name: Fuzz announce operations
        run: cargo +nightly fuzz run fuzz_announce -- -runs=10000 -max_total_time=60

      - name: Fuzz close operations
        run: cargo +nightly fuzz run fuzz_close -- -runs=10000 -max_total_time=60

      - name: Fuzz listen operations
        run: cargo +nightly fuzz run fuzz_listen -- -runs=10000 -max_total_time=60

      - name: Fuzz concurrent operations
        run: cargo +nightly fuzz run fuzz_concurrent -- -runs=1000 -max_total_time=120

      - name: Build all fuzz targets
        run: cargo +nightly fuzz build

  # Examples verification
  examples:
    name: Examples
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      - name: Check examples compile
        run: cargo build --examples

      - name: Run guide examples
        run: |
          cargo run --example 01_basic_usage || true
          cargo run --example 02_async_listening || true
          cargo run --example 03_multiple_listeners || true
          cargo run --example 04_efficient_broadcasting || true
          cargo run --example 05_blocking_operations || true

      - name: Run advanced examples
        run: |
          cargo run --example shutdown || true
          cargo run --example config_broadcast || true
          cargo run --example lazy_init || true

  # Benchmarks (just verify they compile)
  benchmarks:
    name: Benchmarks
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      - name: Check benchmarks compile
        run: cargo bench --no-run

  # Optional: Miri (disabled by default - uncomment to enable)
  # Very slow but thorough undefined behavior detection
  # miri:
  #   name: Miri
  #   runs-on: ubuntu-latest
  #   steps:
  #     - uses: actions/checkout@v4
  #     - uses: dtolnay/rust-toolchain@nightly
  #       with:
  #         components: miri
  #     - run: cargo miri test --all-features