name: CI

on:
  push:
    branches: [master, main]
  pull_request:
    branches: [master, main]
  schedule:
    - cron: '31 6 * * 1'

permissions:
  contents: read

concurrency:
  group: ci-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  CARGO_INCREMENTAL: 0
  RUSTFLAGS: -Dwarnings

jobs:
  changes:
    name: Change detection
    runs-on: ubuntu-latest
    outputs:
      heavy: ${{ steps.detect.outputs.heavy }}
      workflow: ${{ steps.detect.outputs.workflow }}
      mobile: ${{ steps.detect.outputs.mobile }}
      actions: ${{ steps.detect.outputs.actions }}
    steps:
      - uses: actions/checkout@v7
        with:
          fetch-depth: 0
      - name: Detect executable changes
        id: detect
        shell: bash
        env:
          EVENT_NAME: ${{ github.event_name }}
          BASE_REF: ${{ github.base_ref }}
          BEFORE_SHA: ${{ github.event.before }}
        run: |
          set -euo pipefail

          if [[ "${EVENT_NAME}" == "schedule" || "${EVENT_NAME}" == "workflow_dispatch" ]]; then
            echo "heavy=true" >> "${GITHUB_OUTPUT}"
            echo "workflow=true" >> "${GITHUB_OUTPUT}"
            echo "mobile=true" >> "${GITHUB_OUTPUT}"
            echo "actions=true" >> "${GITHUB_OUTPUT}"
            exit 0
          fi

          base=""
          if [[ "${EVENT_NAME}" == "pull_request" && -n "${BASE_REF}" ]]; then
            git fetch --no-tags origin "${BASE_REF}:refs/remotes/origin/${BASE_REF}" --depth=1
            base="origin/${BASE_REF}"
          elif [[ -n "${BEFORE_SHA}" && "${BEFORE_SHA}" != "0000000000000000000000000000000000000000" ]]; then
            base="${BEFORE_SHA}"
          fi

          if [[ -z "${base}" ]]; then
            echo "heavy=true" >> "${GITHUB_OUTPUT}"
            echo "workflow=true" >> "${GITHUB_OUTPUT}"
            echo "mobile=true" >> "${GITHUB_OUTPUT}"
            echo "actions=true" >> "${GITHUB_OUTPUT}"
            exit 0
          fi

          mapfile -t changed < <(git diff --name-only "${base}" "${GITHUB_SHA}" | sort)
          heavy=false
          workflow=false
          mobile=false
          actions=false
          for path in "${changed[@]}"; do
            # Heavy classification. ORDER MATTERS: must-stay-heavy inputs are
            # matched BEFORE any light entry so a script that only a
            # heavy-gated job exercises can never be misclassified as light.
            # Anything unrecognized falls through to the default-heavy `*)`
            # arm (fail-safe default-heavy). Light-classified scripts below
            # are either never run by CI (v0867-setup-qa.sh) or exercised by
            # ALWAYS-on jobs/steps that run regardless of `heavy`
            # (check-versions.sh / check-ohos-deps.sh via Version drift,
            # check-coauthor-trailers.py via Lint), so no coverage is lost.
            case "${path}" in
              scripts/release/npm-wrapper-smoke.js|scripts/mobile-smoke.sh|scripts/check-provider-registry.py)
                heavy=true
                ;;
              docs/*|*.md|.github/PULL_REQUEST_TEMPLATE.md|.github/ISSUE_TEMPLATE/*|.github/workflows/auto-tag.yml|.github/workflows/stale.yml|.github/workflows/triage.yml|scripts/v0867-setup-qa.sh|scripts/release/check-versions.sh|scripts/release/check-ohos-deps.sh|scripts/check-coauthor-trailers.py)
                ;;
              *)
                heavy=true
                ;;
            esac
            case "${path}" in
              crates/workflow/*|workflows/rlm_cache_change.star|.github/workflows/ci.yml)
                workflow=true
                ;;
            esac
            # Mobile runtime surface: the `codewhale-tui serve --mobile`
            # HTTP/SSE stack that scripts/mobile-smoke.sh exercises. Pull
            # requests run the smoke only when one of these changes; every
            # push to main still runs it unconditionally as the pre-release
            # safety net for anything this filter misses.
            case "${path}" in
              crates/app-server/*|crates/tui/src/runtime_api*|crates/tui/src/runtime_mobile.html|crates/tui/src/runtime_threads*|crates/tui/src/main.rs|scripts/mobile-smoke.sh|.github/workflows/ci.yml|Cargo.lock|Cargo.toml)
                mobile=true
                ;;
            esac
            case "${path}" in
              .github/workflows/*|.github/actionlint.yml)
                actions=true
                ;;
            esac
          done

          echo "heavy=${heavy}" >> "${GITHUB_OUTPUT}"
          echo "workflow=${workflow}" >> "${GITHUB_OUTPUT}"
          echo "mobile=${mobile}" >> "${GITHUB_OUTPUT}"
          echo "actions=${actions}" >> "${GITHUB_OUTPUT}"

          echo "Heavy Rust CI required: ${heavy}"
          echo "Workflow RLM cache CI required: ${workflow}"
          echo "Mobile runtime smoke required (PRs): ${mobile}"
          echo "Workflow lint required: ${actions}"
          printf 'Changed files:\n'
          printf '  %s\n' "${changed[@]}"

  versions:
    name: Version drift
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: dtolnay/rust-toolchain@stable
      - uses: actions/setup-node@v6
        with:
          node-version: 20
      - name: Check version drift
        run: ./scripts/release/check-versions.sh
      - name: Check OHOS dependency graph
        run: ./scripts/release/check-ohos-deps.sh

  lint:
    name: Lint
    needs: changes
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
        with:
          fetch-depth: 0
      - uses: dtolnay/rust-toolchain@master
        if: needs.changes.outputs.heavy == 'true'
        with:
          toolchain: stable
          components: rustfmt, clippy
      - uses: mozilla-actions/sccache-action@v0.0.10
        id: sccache
        # Cache bootstrap failures (e.g. GitHub 504s fetching the sccache
        # binary) degrade to an uncached build instead of failing product CI.
        continue-on-error: true
        if: needs.changes.outputs.heavy == 'true'
      - name: Enable sccache
        if: needs.changes.outputs.heavy == 'true' && steps.sccache.outcome == 'success'
        shell: bash
        run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "${GITHUB_ENV}"
          echo "RUSTC_WRAPPER=sccache" >> "${GITHUB_ENV}"
          echo "SCCACHE_IGNORE_SERVER_IO_ERROR=1" >> "${GITHUB_ENV}"
      - name: Install Linux system dependencies
        if: needs.changes.outputs.heavy == 'true'
        run: |
          for i in 1 2 3 4 5; do
            sudo apt-get update && break
            echo "apt-get update failed (attempt $i); retrying in 15s"
            sleep 15
          done
          sudo apt-get install -y libdbus-1-dev pkg-config
      - uses: Swatinem/rust-cache@v2
        if: needs.changes.outputs.heavy == 'true'
        with:
          cache-bin: false
          # PRs restore the cache seeded by main but skip the expensive
          # post-job save; sccache covers PR-specific compilation deltas.
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Check formatting
        if: needs.changes.outputs.heavy == 'true'
        run: cargo fmt --all -- --check
      - name: Run clippy
        if: needs.changes.outputs.heavy == 'true'
        run: |
          cargo clippy --workspace --all-features --locked -- \
            -D warnings \
            -A clippy::uninlined_format_args \
            -A clippy::too_many_arguments \
            -A clippy::unnecessary_map_or \
            -A clippy::collapsible_if \
            -A clippy::assertions_on_constants
      - name: sccache stats
        if: needs.changes.outputs.heavy == 'true' && steps.sccache.outcome == 'success'
        continue-on-error: true
        shell: bash
        run: sccache --show-stats
      - name: Check provider registry drift
        if: needs.changes.outputs.heavy == 'true'
        run: python3 scripts/check-provider-registry.py
      - name: Check README translations stay in sync
        if: github.event_name != 'schedule'
        run: python3 scripts/check-readme-translations.py
      - name: Check harvested contributor credit
        if: github.event_name != 'schedule'
        shell: bash
        run: |
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            git fetch --no-tags origin "${{ github.base_ref }}"
            RANGE="origin/${{ github.base_ref }}..HEAD"
          elif [[ "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]]; then
            RANGE="${{ github.event.before }}..${{ github.sha }}"
          else
            RANGE="HEAD~1..HEAD"
          fi
          python3 scripts/check-coauthor-trailers.py \
            --author-map .github/AUTHOR_MAP \
            --range "$RANGE" \
            --check-authors
      - name: Skip Rust lint for light change
        if: needs.changes.outputs.heavy != 'true'
        run: echo "No executable Rust changes detected; preserving required Lint context."
      - name: Linux clippy location
        if: needs.changes.outputs.heavy == 'true'
        run: echo "Linux clippy/test gates run on CNB for mirrored fix/*, rebrand/*, work/v*, and main branches."

  workflow-rlm-cache:
    name: Workflow RLM cache
    needs: changes
    if: needs.changes.outputs.workflow == 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: dtolnay/rust-toolchain@stable
      - uses: mozilla-actions/sccache-action@v0.0.10
        id: sccache
        continue-on-error: true
      - name: Enable sccache
        if: steps.sccache.outcome == 'success'
        shell: bash
        run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "${GITHUB_ENV}"
          echo "RUSTC_WRAPPER=sccache" >> "${GITHUB_ENV}"
          echo "SCCACHE_IGNORE_SERVER_IO_ERROR=1" >> "${GITHUB_ENV}"
      - uses: Swatinem/rust-cache@v2
        with:
          cache-bin: false
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Run RLM cache workflow mock/replay tests
        run: cargo test -p codewhale-workflow --locked rlm_cache_change

  test:
    name: Test
    needs: changes
    # Required contexts "Test (ubuntu-latest)" / "Test (macos-latest)" /
    # "Test (windows-latest)" derive from job name + matrix.os and are
    # independent of runs-on. For light changes the macOS/Windows legs only
    # echo a skip line, so run them on ubuntu instead of queueing for scarce
    # macOS/Windows runners. Heavy changes use the real matrix OS as before.
    # The ternary is safe: matrix.os is always a non-empty literal, so
    # runs-on can never evaluate to empty.
    runs-on: ${{ needs.changes.outputs.heavy == 'true' && matrix.os || 'ubuntu-latest' }}
    strategy:
      matrix:
        # Linux workspace tests moved to CNB; GitHub keeps the platform
        # coverage CNB cannot provide.
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
      - name: Skip tests for light change
        if: needs.changes.outputs.heavy != 'true'
        run: echo "No executable Rust changes detected; preserving required Test context."
      - uses: actions/checkout@v7
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - uses: dtolnay/rust-toolchain@stable
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - uses: mozilla-actions/sccache-action@v0.0.10
        id: sccache
        continue-on-error: true
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - name: Enable sccache
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest' && steps.sccache.outcome == 'success'
        shell: bash
        run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "${GITHUB_ENV}"
          echo "RUSTC_WRAPPER=sccache" >> "${GITHUB_ENV}"
          echo "SCCACHE_IGNORE_SERVER_IO_ERROR=1" >> "${GITHUB_ENV}"
      - uses: Swatinem/rust-cache@v2
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        with:
          cache-bin: false
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Run tests
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        run: cargo test --workspace --all-features --locked
      - name: Lockfile drift guard
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        run: git diff --exit-code -- Cargo.lock
      - name: Run Offline Eval Harness
        # The eval harness is OS-independent prompt/composition checking;
        # running it once (on the faster macOS leg, warm from the test build)
        # instead of once per desktop OS keeps the coverage while taking
        # ~2min off the Windows critical path.
        if: needs.changes.outputs.heavy == 'true' && matrix.os == 'macos-latest'
        run: cargo run -p codewhale-tui --all-features -- eval
      - name: sccache stats
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest' && steps.sccache.outcome == 'success'
        continue-on-error: true
        shell: bash
        run: sccache --show-stats
      - name: Linux test location
        if: needs.changes.outputs.heavy == 'true' && matrix.os == 'ubuntu-latest'
        run: echo "Linux workspace tests run on CNB for mirrored first-party branches."

  npm-wrapper-smoke:
    name: npm wrapper smoke
    needs: changes
    if: github.event_name != 'schedule'
    # Same ternary rationale as the Test job: light legs only echo, so keep
    # them off macOS/Windows runners. On pull_request the matrix is
    # ubuntu-only, so the required "npm wrapper smoke (ubuntu-latest)"
    # context is unaffected.
    runs-on: ${{ needs.changes.outputs.heavy == 'true' && matrix.os || 'ubuntu-latest' }}
    strategy:
      matrix:
        os: ${{ fromJSON(github.event_name == 'pull_request' && '["ubuntu-latest"]' || '["ubuntu-latest","macos-latest","windows-latest"]') }}
    steps:
      - name: Skip npm wrapper smoke for light change
        if: needs.changes.outputs.heavy != 'true'
        run: echo "No executable Rust changes detected; preserving required npm wrapper smoke context."
      - uses: actions/checkout@v7
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - uses: dtolnay/rust-toolchain@stable
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - uses: mozilla-actions/sccache-action@v0.0.10
        id: sccache
        continue-on-error: true
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
      - name: Enable sccache
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest' && steps.sccache.outcome == 'success'
        shell: bash
        run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "${GITHUB_ENV}"
          echo "RUSTC_WRAPPER=sccache" >> "${GITHUB_ENV}"
          echo "SCCACHE_IGNORE_SERVER_IO_ERROR=1" >> "${GITHUB_ENV}"
      - uses: actions/setup-node@v6
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        with:
          node-version: 20
      - uses: Swatinem/rust-cache@v2
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        with:
          cache-bin: false
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Build wrapper binaries
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        # The smoke validates wrapper install/delegation plumbing, not
        # codegen quality, so skip fat LTO + codegen-units=1 for a much
        # cheaper release build. Shipped binaries keep the real profile via
        # the Release workflow.
        env:
          CARGO_PROFILE_RELEASE_LTO: 'off'
          CARGO_PROFILE_RELEASE_CODEGEN_UNITS: '16'
        run: cargo build --release --locked -p codewhale-cli -p codewhale-tui
      - name: Smoke wrapper install and delegated entrypoints
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest'
        run: node scripts/release/npm-wrapper-smoke.js
      - name: sccache stats
        if: needs.changes.outputs.heavy == 'true' && matrix.os != 'ubuntu-latest' && steps.sccache.outcome == 'success'
        continue-on-error: true
        shell: bash
        run: sccache --show-stats
      - name: Linux smoke location
        if: needs.changes.outputs.heavy == 'true' && matrix.os == 'ubuntu-latest'
        run: echo "Linux npm wrapper smoke runs on CNB for mirrored first-party branches."

  mobile-smoke:
    name: Mobile runtime smoke
    needs: changes
    # Not a required PR context. Pull requests run it only when the mobile
    # runtime surface changed (see the `mobile` filter above); every push to
    # main runs it unconditionally as the pre-release safety net.
    if: >-
      github.event_name != 'schedule' &&
      needs.changes.outputs.heavy == 'true' &&
      (github.event_name != 'pull_request' || needs.changes.outputs.mobile == 'true')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: dtolnay/rust-toolchain@stable
      - uses: mozilla-actions/sccache-action@v0.0.10
        id: sccache
        continue-on-error: true
      - name: Enable sccache
        if: steps.sccache.outcome == 'success'
        shell: bash
        run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "${GITHUB_ENV}"
          echo "RUSTC_WRAPPER=sccache" >> "${GITHUB_ENV}"
          echo "SCCACHE_IGNORE_SERVER_IO_ERROR=1" >> "${GITHUB_ENV}"
      - name: Install Linux system dependencies
        run: |
          for i in 1 2 3 4 5; do
            sudo apt-get update && break
            echo "apt-get update failed (attempt $i); retrying in 15s"
            sleep 15
          done
          sudo apt-get install -y libdbus-1-dev pkg-config
      - uses: Swatinem/rust-cache@v2
        with:
          cache-bin: false
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Run mobile smoke tests
        # The smoke exercises HTTP/SSE runtime behaviour, not codegen
        # quality; skipping fat LTO + codegen-units=1 cuts the in-script
        # release build from ~12min to a fraction of that.
        env:
          CARGO_PROFILE_RELEASE_LTO: 'off'
          CARGO_PROFILE_RELEASE_CODEGEN_UNITS: '16'
        run: ./scripts/mobile-smoke.sh
      - name: sccache stats
        if: steps.sccache.outcome == 'success'
        continue-on-error: true
        shell: bash
        run: sccache --show-stats

  actionlint:
    name: Workflow lint
    needs: changes
    if: needs.changes.outputs.actions == 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - name: Run actionlint
        uses: docker://rhysd/actionlint:1.7.7
        with:
          # SC2129 (grouped redirects) is style-only and endemic to the
          # existing GITHUB_ENV/GITHUB_OUTPUT append pattern; SC2221/SC2222
          # flag the long-standing `*.md` glob shadowing the PR-template
          # entry in change detection, which is intentional.
          args: -color -ignore SC2129 -ignore SC2221 -ignore SC2222

  # Check documentation builds without warnings
  docs:
    name: Documentation
    if: github.event_name == 'schedule'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: dtolnay/rust-toolchain@stable
      - name: Install Linux system dependencies
        if: runner.os == 'Linux'
        run: |
          for i in 1 2 3 4 5; do
            sudo apt-get update && break
            echo "apt-get update failed (attempt $i); retrying in 15s"
            sleep 15
          done
          sudo apt-get install -y libdbus-1-dev pkg-config
      - uses: Swatinem/rust-cache@v2
        with:
          cache-bin: false
      - name: Build docs
        run: cargo doc --workspace --no-deps
        env:
          RUSTDOCFLAGS: -Dwarnings