name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

env:
  RUST_BACKTRACE: 1

jobs:
  msrv:
    name: Minimum Supported Rust Version
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      # Install cargo-msrv
      - name: Install cargo-msrv
        uses: taiki-e/install-action@v2
        with:
          tool: cargo-msrv

      # Verify MSRV from Cargo.toml
      - name: Verify MSRV
        run: cargo msrv verify

  test:
    name: Test
    runs-on: ubuntu-latest
    strategy:
      matrix:
        rust:
          - stable
          - beta
          - nightly
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}

      # Install nextest for faster testing
      - name: Install nextest
        uses: taiki-e/install-action@nextest

      # Run tests with different feature combinations
      - name: Test (all features)
        run: cargo nextest run --all-features

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

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

      - name: Test (with tracing)
        run: cargo nextest run --features std,tracing

  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

  mutants:
    name: Mutation Testing
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      # Install nextest for faster test execution
      - name: Install nextest
        uses: taiki-e/install-action@nextest

      # Install cargo-mutants
      - name: Install cargo-mutants
        uses: taiki-e/install-action@cargo-mutants

      # Run quick mutation tests on critical functions only
      - name: Run mutation tests
        run: cargo mutants --no-shuffle --test-tool nextest --file src/lib.rs --re "announce|listen|close|is_announced|is_closed|try_listen"

  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

  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

  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

      # Run each fuzz target for a short time to catch obvious issues
      - 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

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

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

      # Test that all examples compile and run
      - name: Check examples compile
        run: cargo build --examples

      # Note: If specific examples don't exist, these will fail and need adjustment
      - 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

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

  benchmarks:
    name: Benchmarks
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable

      # Just verify benchmarks compile, don't run (too slow for CI)
      - name: Check benchmarks compile
        run: cargo bench --no-run