name: Fuzz

# Short-duration fuzz run: weekly schedule + manual dispatch. Each target
# runs for 5 minutes with the committed seed corpus. For longer hunts, run
# locally: `cargo +nightly fuzz run <target> -- -max_total_time=1800`.
#
# We deliberately do NOT fuzz on every push -- runs are too long for that.

on:
  schedule:
    # Mondays 04:15 UTC.
    - cron: "15 4 * * 1"
  workflow_dispatch:
    inputs:
      duration_seconds:
        description: "Per-target fuzz time (seconds)"
        required: false
        default: "300"

env:
  CARGO_TERM_COLOR: always

jobs:
  fuzz:
    name: Fuzz ${{ matrix.target }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        target:
          - fuzz_header_parse
          - fuzz_transform_header_parse
          - fuzz_compression_transform_header_parse
          - fuzz_compound_split
          - fuzz_frame_parse
          - fuzz_sub_frame_parse
          - fuzz_negotiate_request_parse
          - fuzz_negotiate_response_parse
          - fuzz_create_request_parse
          - fuzz_create_response_parse
          - fuzz_query_info_response_parse
          - fuzz_dfs_referral_response_parse

    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Install Rust nightly
        uses: dtolnay/rust-toolchain@nightly

      - name: Cache cargo registry and target
        uses: Swatinem/rust-cache@v2
        with:
          workspaces: |
            .
            fuzz

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

      - name: Run fuzz target
        env:
          DURATION: ${{ github.event.inputs.duration_seconds || '300' }}
        run: |
          cargo +nightly fuzz run "${{ matrix.target }}" \
            -- -max_total_time="${DURATION}" -print_final_stats=1

      - name: Upload crash artifacts (if any)
        if: failure()
        uses: actions/upload-artifact@v7
        with:
          name: fuzz-crash-${{ matrix.target }}
          path: fuzz/artifacts/${{ matrix.target }}/
          if-no-files-found: ignore