name: CI

on:
  push:
    branches: [main]
  pull_request:

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: "-D warnings"

jobs:
  fmt:
    name: Format
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt
      - run: cargo fmt --all --check

  clippy:
    name: Lint (${{ matrix.lua }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        # mlua's Lua-flavor features are mutually exclusive, so we can't
        # use --all-features. Run clippy under each supported flavor.
        lua: [luajit, lua54]
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
      - uses: Swatinem/rust-cache@v2
      - run: cargo clippy --all-targets --no-default-features --features ${{ matrix.lua }} -- -D warnings

  test:
    name: Test (${{ matrix.os }} / ${{ matrix.lua }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
        lua: [luajit, lua54]
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - run: cargo build --all-targets --no-default-features --features ${{ matrix.lua }}
      - run: cargo test --all-targets --no-default-features --features ${{ matrix.lua }}
      - run: cargo test --doc --no-default-features --features ${{ matrix.lua }}

  acceptance:
    name: M1 Acceptance Gates
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - name: perf, memory, and 30s fuzz gates
        run: cargo test --release --test acceptance -- --ignored --nocapture

  m4-perf-gates:
    name: M4 Perf Gates
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - name: tree-sitter parse + highlight latency budgets
        run: cargo test --release --test m4_acceptance -- --ignored --nocapture

  # m5-perf-gates: luajit-only by design.
  # The keystroke-to-render gate measures protocol-path latency (Unix
  # socket frontend ↔ daemon RTT plus the daemon's keymap-dispatch /
  # buffer-mutate / repaint pipeline). Lua flavor is irrelevant — the
  # measured path doesn't enter the Lua VM. Matrixing over flavors
  # doubles CI cost without adding signal. If a future perf gate
  # measures Lua-touching code paths (command dispatch via Lua,
  # hook invocation), revisit then.
  m5-perf-gates:
    name: M5 Perf Gates
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - name: keystroke-to-render p99 over loopback LocalSocket
        run: cargo test --release --test m5_perf_acceptance -- --ignored --nocapture

  # m6-perf-gates: luajit-only by design. The M6.6/M6.7 gates measure
  # rope-append throughput, RSS ceiling, cancel-response latency,
  # scrollback navigation latency, and scrollback search latency —
  # none of which exercise the Lua VM's hot path differently across
  # flavors. Same reasoning as m5-perf-gates above.
  #
  # --test-threads=1 is required: the M6.6 RSS-ceiling gate samples
  # process-wide /proc/self/status, and concurrent ingest / scrollback
  # populate from sibling tests inflate that reading. Serializing
  # gives each test a clean baseline. The wall-clock cost of serial
  # execution (~5 minutes) is acceptable for a perf-gates job that
  # only runs on push/PR.
  m6-perf-gates:
    name: M6 Perf Gates
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
      - uses: Swatinem/rust-cache@v2
      - name: ingest rate, RSS ceiling, cancel p99, navigation p99, search p99
        run: cargo test --release --test m6_perf_acceptance -- --ignored --nocapture --test-threads=1