name: tests

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-go@v6
        with:
          go-version: '1.25'
          cache: false
      - uses: actions/setup-python@v7
        with:
          python-version: '3.12'
      - name: Install pinned linters
        run: |
          go install github.com/rhysd/actionlint/cmd/actionlint@v1.7.12
          python -m pip install ruff==0.15.6
      - name: Lint GitHub Actions workflows
        run: actionlint -shellcheck= -pyflakes=
      - name: Lint Python scripts and tests
        run: ruff check --select E9,F63,F7,F82 tests scripts

  tests:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies (Linux)
        if: runner.os == 'Linux'
        run: |
          sudo apt-get update
          sudo apt-get install -y libpcre2-dev libmbedtls-dev libsodium-dev libuv1-dev libc-ares-dev valgrind

      - name: Install dependencies (macOS)
        if: runner.os == 'macOS'
        run: brew install mbedtls@3 libsodium libuv c-ares pcre2

      - name: Build test binaries
        run: |
          mkdir -p build && cd build
          cmake .. -DCMAKE_BUILD_TYPE=Release
          jobs="$(nproc 2>/dev/null || sysctl -n hw.ncpu)"
          make -j"$jobs"

      - name: CTest
        run: ctest --test-dir build -LE memcheck --output-on-failure --no-tests=error

      - name: Valgrind leak smoke tests
        if: runner.os == 'Linux'
        run: ctest --test-dir build -L memcheck --output-on-failure --no-tests=error

      - name: ss-setup TUI tests
        run: bash tests/test_ss_setup.sh

      - name: Stress test
        run: |
          python3 tests/stress_test.py --bin build/bin/ --size 10

      - name: ss-redir transparent proxy test (QEMU)
        if: runner.os == 'Linux'
        run: |
          sudo apt-get install -y qemu-system-x86
          bash tests/test_redir_qemu.sh build/bin/
        timeout-minutes: 8

  asan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y libpcre2-dev libmbedtls-dev libsodium-dev libuv1-dev libc-ares-dev

      - name: Build with ASan + UBSan
        run: |
          mkdir -p build && cd build
          cmake .. -DENABLE_SANITIZERS=ON
          make -j"$(nproc)"

      - name: CTest (ASan + UBSan)
        run: ctest --test-dir build -LE memcheck --output-on-failure --no-tests=error

      - name: Stress test (ASan + UBSan)
        run: python3 tests/stress_test.py --bin build/bin/ --size 10

  clang-tidy:
    runs-on: ubuntu-latest
    env:
      # Ratchet: number of known clang-tidy warnings (see .clang-tidy),
      # counted with clang-tidy-18 (pinned below so runner upgrades don't move
      # the number). All baseline findings have been fixed or triaged
      # (false positives carry NOLINT comments with rationale), so any new
      # warning fails CI.
      MAX_WARNINGS: 0
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y clang-tidy-18 clang-tools-18 libpcre2-dev libmbedtls-dev libsodium-dev libuv1-dev libc-ares-dev

      - name: Configure (compile_commands.json)
        run: cmake -S . -B build

      - name: Run clang-tidy on project sources
        run: |
          set -o pipefail
          tidy_status=0
          run-clang-tidy-18 -quiet -p build "$PWD/src/[^/]+\.c$" 2>&1 | tee tidy.log || tidy_status=$?
          grep 'warning:' tidy.log | sort -u > warnings.txt || true
          count="$(wc -l < warnings.txt)"
          echo "clang-tidy warnings: $count (max allowed: $MAX_WARNINGS)"
          {
            echo "### clang-tidy: $count warnings (budget: $MAX_WARNINGS)"
            echo '```'
            cat warnings.txt
            echo '```'
          } >> "$GITHUB_STEP_SUMMARY"
          if [ "$tidy_status" -ne 0 ] || grep -qE 'error:' tidy.log; then
            echo "clang-tidy failed (exit status: $tidy_status). See tidy.log for diagnostics."
            exit 1
          fi
          if [ "$count" -gt "$MAX_WARNINGS" ]; then
            echo "FAIL: warning count $count exceeds budget $MAX_WARNINGS."
            echo "Fix the new warnings (or, if a check is misfiring, adjust .clang-tidy)."
            exit 1
          fi

      - name: Upload clang-tidy diagnostics
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: clang-tidy-diagnostics
          path: |
            tidy.log
            warnings.txt
          if-no-files-found: ignore

  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y lcov libpcre2-dev libmbedtls-dev libsodium-dev libuv1-dev libc-ares-dev

      - name: Build with coverage instrumentation
        run: |
          mkdir -p build && cd build
          cmake .. -DENABLE_COVERAGE=ON
          make -j"$(nproc)"

      - name: Run tests
        run: |
          ctest --test-dir build -LE memcheck --output-on-failure --no-tests=error
          python3 tests/stress_test.py --bin build/bin/ --size 10

      - name: Generate coverage report
        run: |
          cmake --build build --target coverage
          {
            echo '### Coverage (src/, unit + stress tests)'
            echo '```'
            lcov --list build/coverage.info --ignore-errors unused,empty
            echo '```'
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Upload HTML report
        uses: actions/upload-artifact@v4
        with:
          name: coverage-html
          path: build/coverage-html/

  interop:
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v6
      - name: Install dependencies and independent peer
        run: brew install mbedtls@3 libsodium libuv c-ares pcre2 shadowsocks-rust
      - name: Build
        run: |
          cmake -S . -B build -DSS_DEPENDENCY_MODE=system -DWITH_STATIC=OFF
          cmake --build build --parallel
      - name: Required interoperability
        env:
          SS_REQUIRE_INTEROP: '1'
          SS_BIN_DIR: build/bin
        run: bash tests/test_interop_rust.sh