name: CI

on:
    push:
        branches:
            - master
    pull_request:
        branches:
            - master
    workflow_dispatch:

# Superseded PR pushes cancel their still-running checks. Non-PR runs get a
# unique group (run_id) because GitHub keeps at most one pending run per
# group even with cancel-in-progress: false — a shared ref group would let a
# rapid master push silently replace a queued sibling and leave a merged
# commit without a lint/test record.
concurrency:
    group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.run_id }}
    cancel-in-progress: ${{ github.event_name == 'pull_request' }}

permissions:
    contents: read

jobs:
    actionlint:
        name: Workflow lint
        runs-on: ubuntu-latest
        timeout-minutes: 10

        steps:
            - name: Checkout code
              uses: actions/checkout@v7

            # Image pinned by digest (tag 1.7.12). False positives are
            # suppressed in .github/actionlint.yaml; shellcheck runs at
            # warning+ severity so style/info notes in long release scripts
            # don't fail CI while real quoting/logic bugs still do.
            - name: Run actionlint
              uses: docker://rhysd/actionlint:1.7.12@sha256:b1934ee5f1c509618f2508e6eb47ee0d3520686341fec936f3b79331f9315667
              with:
                  args: -color
              env:
                  SHELLCHECK_OPTS: --severity=warning

    release-note-gate:
        name: Release note gate
        if: github.event_name == 'pull_request'
        runs-on: ubuntu-latest
        timeout-minutes: 10
        permissions:
            contents: read
            pull-requests: read

        steps:
            - name: Checkout code
              uses: actions/checkout@v7

            # The gate scripts are dependency-free Node, so this job skips
            # pnpm install entirely and stays cheap.
            - name: Validate release note format
              run: node tools/release/build-release-notes.mjs --validate

            # Labels are fetched live rather than read from the (stale) event
            # payload, so applying `no-release-note` and re-running the check
            # works without a new push. Policy lives in a unit-tested script,
            # not in workflow bash.
            - name: Require a release note for user-visible changes
              env:
                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
                  PR_NUMBER: ${{ github.event.pull_request.number }}
              run: |
                  set -euo pipefail

                  gh api "repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?per_page=100" \
                      --paginate --jq '[.[] | {filename, status}]' |
                      jq -s 'add // []' > /tmp/pr-files.json

                  gh api "repos/${GITHUB_REPOSITORY}/issues/${PR_NUMBER}/labels?per_page=100" \
                      --paginate --jq '[.[].name]' |
                      jq -s 'add // []' > /tmp/pr-labels.json

                  jq -n \
                      --slurpfile files /tmp/pr-files.json \
                      --slurpfile labels /tmp/pr-labels.json \
                      '{files: $files[0], labels: $labels[0]}' |
                      node tools/release/check-release-note-gate.mjs

    lint:
        name: Lint
        runs-on: ubuntu-latest
        timeout-minutes: 30

        steps:
            - name: Checkout code
              uses: actions/checkout@v7
              with:
                  # nx affected needs the merge-base with the PR target branch.
                  fetch-depth: 0

            - name: Install pnpm
              uses: pnpm/action-setup@v6.1.0

            - name: Setup Node.js
              uses: actions/setup-node@v7
              with:
                  node-version-file: '.nvmrc'
                  cache: 'pnpm'

            - name: Install dependencies
              run: pnpm install --frozen-lockfile

            # PRs lint only affected projects for faster feedback; root config
            # or lockfile changes make every project affected, so the
            # module-boundary and max-lines rules cannot be dodged this way.
            - name: Lint affected projects (PR)
              if: github.event_name == 'pull_request'
              run: pnpm nx affected --target=lint --base=origin/${{ github.base_ref }} --head=HEAD --parallel=3 --output-style=static
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false

            - name: Lint all projects (master)
              if: github.event_name != 'pull_request'
              run: pnpm nx run-many --target=lint --all --parallel=3 --output-style=static
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false

    initial-bytes-ratchet:
        name: Initial bytes ratchet
        runs-on: ubuntu-latest
        timeout-minutes: 30
        # pull-requests: read lets the direction check read the PR's labels.
        permissions:
            contents: read
            pull-requests: read

        steps:
            - name: Checkout code
              uses: actions/checkout@v7

            - name: Install pnpm
              uses: pnpm/action-setup@v6.1.0

            - name: Setup Node.js
              uses: actions/setup-node@v7
              with:
                  node-version-file: '.nvmrc'
                  cache: 'pnpm'

            - name: Install dependencies
              run: pnpm install --frozen-lockfile

            # The ratchet below compares a measurement with the baselines file
            # of the same commit, so it cannot see a change that grows the
            # payload and raises the baseline to match. Compare the file with
            # the revision this one is measured against instead: the target
            # branch for a pull request, the previous head for a master push,
            # master for a manual dispatch. Any raised limit, widened tolerance
            # or slack, or removed entry fails, unless a maintainer put the
            # perf-baseline-increase label on the pull request. For a master
            # push the label counts only when the push added exactly one
            # first-parent commit (a squash or merge of one PR) and that
            # commit's PR carries it: the check compares the whole push, so a
            # multi-commit push cannot borrow one PR's label for another's
            # increase. Labels are read from the API, not the event payload,
            # so re-running this job after adding the label picks it up.
            - name: Refuse baseline increases against the previous revision
              env:
                  EVENT_NAME: ${{ github.event_name }}
                  BASE_REF: ${{ github.base_ref }}
                  BEFORE_SHA: ${{ github.event.before }}
                  HEAD_SHA: ${{ github.sha }}
                  PR_NUMBER: ${{ github.event.pull_request.number }}
                  REPOSITORY: ${{ github.repository }}
                  GH_TOKEN: ${{ github.token }}
                  INCREASE_LABEL: perf-baseline-increase
              run: |
                  set -euo pipefail
                  case "$EVENT_NAME" in
                      pull_request)
                          git fetch --no-tags --depth=1 origin "$BASE_REF"
                          ;;
                      push)
                          if [ -z "$BEFORE_SHA" ] || [ "$BEFORE_SHA" = "0000000000000000000000000000000000000000" ]; then
                              echo "No previous revision for this push; nothing to compare against."
                              exit 0
                          fi
                          git fetch --no-tags --depth=1 origin "$BEFORE_SHA"
                          ;;
                      *)
                          git fetch --no-tags --depth=1 origin master
                          ;;
                  esac
                  git show "FETCH_HEAD:tools/performance/journey-baselines.json" > /tmp/base-journey-baselines.json 2>/dev/null ||
                      rm -f /tmp/base-journey-baselines.json
                  case "$EVENT_NAME" in
                      pull_request)
                          labels="$(gh api "repos/$REPOSITORY/issues/$PR_NUMBER/labels?per_page=100" --paginate --jq '.[].name')"
                          ;;
                      push)
                          parent="$(gh api "repos/$REPOSITORY/commits/$HEAD_SHA" --jq '.parents[0].sha')"
                          if [ "$parent" = "$BEFORE_SHA" ]; then
                              labels="$(gh api "repos/$REPOSITORY/commits/$HEAD_SHA/pulls?per_page=100" --paginate --jq '.[].labels[].name')"
                          else
                              echo "This push added more than one commit; the $INCREASE_LABEL label is not consulted."
                              labels=""
                          fi
                          ;;
                      *)
                          labels=""
                          ;;
                  esac
                  allow=()
                  if grep -qxF "$INCREASE_LABEL" <<< "$labels"; then
                      echo "The $INCREASE_LABEL label is set; weakened baselines are reported, not failed."
                      allow=(--allow-increase)
                  fi
                  node tools/performance/check-baseline-direction.mjs \
                      --base /tmp/base-journey-baselines.json \
                      --head tools/performance/journey-baselines.json \
                      "${allow[@]}"

            # The production configuration is what users download; measuring
            # any other build would ratchet a number nobody ships.
            - name: Build web app (production)
              run: pnpm nx build web --skip-nx-cache
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false

            # Fails when renderer.initialBytes exceeds value + slack committed
            # in tools/performance/journey-baselines.json. Baselines only move
            # down, with the printed measurement as evidence; the contract is
            # docs/architecture/performance-journeys.md.
            - name: Check renderer.initialBytes against the baseline
              run: pnpm run perf:initial-bytes:check

            - name: Upload journey summary
              if: always()
              uses: actions/upload-artifact@v7
              with:
                  name: performance-journey-summary
                  path: dist/performance/
                  retention-days: 14

    # Decides whether a pull request can move the performance journeys, so
    # the journeys job below does not spend a runner on docs-only changes.
    # Pushes to master and manual dispatches always run them.
    performance-journeys-scope:
        name: Performance journeys scope
        runs-on: ubuntu-latest
        timeout-minutes: 5
        outputs:
            run: ${{ steps.scope.outputs.run }}

        steps:
            # The PR checkout is the merge commit: its first parent is the
            # target branch, so two commits are enough to diff the PR.
            - name: Checkout code
              if: github.event_name == 'pull_request'
              uses: actions/checkout@v7
              with:
                  fetch-depth: 2

            # Anything can move a journey (application code, the harness, root
            # build inputs such as .nvmrc, nx.json or tsconfig.base.json), so
            # the filter lists what cannot: the same paths the E2E workflow
            # ignores, plus release notes.
            - name: Detect journey-relevant changes
              id: scope
              env:
                  EVENT_NAME: ${{ github.event_name }}
              run: |
                  set -euo pipefail
                  if [ "$EVENT_NAME" != "pull_request" ]; then
                      echo "run=true" >> "$GITHUB_OUTPUT"
                      exit 0
                  fi
                  relevant="$(git diff --name-only HEAD^1 HEAD |
                      grep -vE '\.md$|^docs/|^\.plans/|^\.codex/|^\.claude/|^\.changes/|^apps/website/' || true)"
                  if [ -n "$relevant" ]; then
                      echo "Journey-relevant changes:"
                      echo "$relevant"
                      echo "run=true" >> "$GITHUB_OUTPUT"
                  else
                      echo "No journey-relevant changes; skipping the performance journeys."
                      echo "run=false" >> "$GITHUB_OUTPUT"
                  fi

    # Runs the journey benchmarks (docs/architecture/performance-journeys.md)
    # on the canonical Linux runner and uploads the summary as evidence.
    performance-journeys:
        name: Performance journeys
        needs: performance-journeys-scope
        if: needs.performance-journeys-scope.outputs.run == 'true'
        runs-on: ubuntu-latest
        # The electron-performance build is the bulk of the time; each journey
        # (launch, open-source, playback, search) is six fresh Electron
        # processes plus one seeding run.
        timeout-minutes: 30
        # Warn-only for the first two weeks of plan item B3: a failure is
        # visible on the run but does not fail the workflow.
        continue-on-error: true
        env:
            NX_SKIP_NX_CACHE: true

        steps:
            - name: Checkout code
              uses: actions/checkout@v7

            - name: Install pnpm
              uses: pnpm/action-setup@v6.1.0

            - name: Setup Node.js
              uses: actions/setup-node@v7
              with:
                  node-version-file: '.nvmrc'
                  cache: 'pnpm'

            - name: Install dependencies
              run: pnpm install --frozen-lockfile

            # Electron dependency check, the xvfb run, the summary lookup and
            # the job-summary report; shared with performance-ratchet.yml.
            - name: Run the performance journeys
              id: journeys
              uses: ./.github/actions/performance-journeys

            # Only the counters identical in every measured iteration of
            # recent master runs; their entries say whether a counter is
            # validated against wall-clock or a guard only (see Ratchet in
            # docs/architecture/performance-journeys.md). Here and not in the
            # composite action, so the weekly tightening still measures a run
            # that would fail it. tools/performance tests keep this list equal
            # to the journey entries of journey-baselines.json. It also runs
            # when a later step of the action (the job-summary report) failed
            # after the summary was written, so the counters are still checked.
            - name: Check the journey counters against the baselines
              if: ${{ !cancelled() && steps.journeys.outputs.summary != '' }}
              env:
                  SUMMARY: ${{ steps.journeys.outputs.summary }}
              run: >-
                  node tools/performance/check-journey-ratchet.mjs
                  --summary "$SUMMARY"
                  --only launch/renderer.ipcCallsToFirstCard
                  --only launch/renderer.domMutationsToFirstCard
                  --only launch/main.modulesRegisteredBeforeWindow
                  --only launch/renderer.layoutShiftScore
                  --only launch/renderer.layoutShiftScoreSettled
                  --only open-source/main.mockHttpRequestsToSettled
                  --only open-source/renderer.ipcCallsToFirstPage
                  --only open-source/renderer.layoutShiftScore
                  --only playback/renderer.httpRequestsToPlaying
                  --only playback/renderer.layoutShiftScore

            - name: Upload journey summaries
              if: always()
              uses: actions/upload-artifact@v7
              with:
                  name: performance-journeys
                  path: dist/performance/journeys/
                  if-no-files-found: warn
                  retention-days: 14

    unit-and-typecheck:
        name: Unit Tests and Typechecks
        runs-on: ubuntu-latest
        timeout-minutes: 45
        permissions:
            contents: read
            # The scope step lists the PR's changed files through the API.
            pull-requests: read

        steps:
            - name: Checkout code
              uses: actions/checkout@v7

            - name: Install pnpm
              uses: pnpm/action-setup@v6.1.0

            - name: Setup Node.js
              uses: actions/setup-node@v7
              with:
                  node-version-file: '.nvmrc'
                  cache: 'pnpm'

            - name: Install dependencies
              run: pnpm install --frozen-lockfile

            - name: Validate agent guidance
              run: pnpm run agents:validate

            - name: Validate Nx dependency version policy
              run: pnpm run deps:nx:validate

            - name: Validate Vite dev-server transform filter patch
              run: pnpm run deps:vite:test

            - name: Validate electron-builder keychain password patch
              run: pnpm run deps:electron-builder:test

            - name: Validate the font weight scale
              run: pnpm run styles:font-weights:validate

            - name: Validate stylesheet Nx inputs
              run: pnpm run styles:inputs:validate

            - name: Validate Angular Material token overrides
              run: pnpm run styles:material-tokens:validate

            # Nx rejects a non-parallel task with continuous dependencies, and
            # the Playwright plugin infers serve dependencies only when CI is
            # unset, so this checks both the local and the CI inference.
            - name: Validate Playwright task graphs
              run: pnpm run e2e:task-graphs:validate

            - name: Typecheck web and Electron entry points
              run: pnpm run typecheck:ci

            - name: Typecheck Jest spec programs
              run: pnpm run typecheck:spec:test && pnpm run typecheck:spec

            # Fails on missing or extra keys and on values identical to
            # English that tools/i18n/identical-en-baseline.json does not list.
            # The baseline only changes through a reviewed
            # `pnpm run i18n:baseline:update`; CI never rewrites it.
            - name: Check i18n drift and untranslated values
              run: pnpm run i18n:validate

            # Node specs for the benchmark and journey harness (about ten
            # seconds). They live in the E2E app, which the unit coverage scope
            # below treats as out of scope, so this step is not gated by it.
            - name: Test the performance harness
              run: pnpm nx run electron-backend-e2e:test-performance-harness --skip-nx-cache
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false

            # A pull request whose changes cannot reach any Tier A test (docs,
            # notes, other workflows, website, E2E and mock-server apps, release
            # and packaging tooling, a scripts-only package.json edit) skips the
            # suite. The allowlist lives in a unit-tested script; anything it
            # does not know runs everything, and master always runs everything.
            - name: Decide unit coverage scope
              id: scope
              env:
                  EVENT_NAME: ${{ github.event_name }}
                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
                  PR_NUMBER: ${{ github.event.pull_request.number }}
                  BASE_SHA: ${{ github.event.pull_request.base.sha }}
                  CHANGED_FILES: ${{ github.event.pull_request.changed_files }}
              run: |
                  set -euo pipefail
                  if [ "$EVENT_NAME" != "pull_request" ]; then
                      echo "Not a pull request; running the full suite."
                      echo "run=true" >> "$GITHUB_OUTPUT"
                      exit 0
                  fi
                  # The list-files endpoint stops at 3,000 files; a truncated
                  # list could hide a file that needs the suite.
                  if [ "${CHANGED_FILES:-0}" -ge 3000 ]; then
                      echo "PR changes ${CHANGED_FILES} files, beyond the API listing limit; running the full suite."
                      echo "run=true" >> "$GITHUB_OUTPUT"
                      exit 0
                  fi
                  git fetch --no-tags --depth=1 origin "$BASE_SHA"
                  gh api "repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?per_page=100" \
                      --paginate --jq '.[] | .filename, (.previous_filename // empty)' |
                      node tools/coverage/unit-coverage-scope.mjs --base FETCH_HEAD --github-output

            # pnpm only runs build scripts for allow-listed packages
            # (pnpm-workspace.yaml), so electron's postinstall never fetches
            # its binary. `require('electron')` then downloads it lazily, and
            # parallel Jest workers and Tier A projects that spawn Electron
            # race on the same download: one executes the half-written binary
            # (ETXTBSY). Fetch it once before the Tier A suite, the only step
            # here whose specs spawn Electron. Unlike a bare install.js, the
            # helper also runs the binary, so a partial extraction fails here.
            # The Tier A runner calls it too; this step only separates a
            # download failure from test failures.
            - name: Install the Electron binary
              if: steps.scope.outputs.run == 'true'
              run: node tools/testing/ensure-electron-binary.mjs

            # Jest's transform cache (TypeScript/Angular transpilation plus
            # coverage instrumentation, keyed by file content) is persisted
            # between runs. Only master pushes and maintainer dispatches save
            # it; pull requests restore it and never write, so a PR cannot plant
            # an entry that a later master run would read.
            - name: Restore Jest transform cache
              if: steps.scope.outputs.run == 'true' && github.event_name != 'push'
              uses: actions/cache/restore@v6
              with:
                  path: ${{ runner.temp }}/jest-cache
                  key: jest-transform-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'tsconfig.base.json', 'jest.preset.js', 'jest.web-esm.workspace.ts', 'apps/web/jest.config.ts') }}-${{ github.run_id }}
                  restore-keys: |
                      jest-transform-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'tsconfig.base.json', 'jest.preset.js', 'jest.web-esm.workspace.ts', 'apps/web/jest.config.ts') }}-

            - name: Run Tier A unit coverage suite
              if: steps.scope.outputs.run == 'true'
              run: pnpm run coverage:ci
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false
                  JEST_CACHE_DIRECTORY: ${{ runner.temp }}/jest-cache

            - name: Validate coverage tooling (suite skipped)
              if: steps.scope.outputs.run != 'true'
              run: pnpm run coverage:tools:test && pnpm run coverage:policy:check

            # Master pushes start from an empty cache, so the saved cache holds
            # exactly the current tree and does not grow run over run.
            - name: Save Jest transform cache
              if: >-
                  steps.scope.outputs.run == 'true' &&
                  (github.event_name == 'workflow_dispatch' ||
                  (github.event_name == 'push' && github.ref == 'refs/heads/master'))
              uses: actions/cache/save@v6
              with:
                  path: ${{ runner.temp }}/jest-cache
                  key: jest-transform-${{ runner.os }}-${{ hashFiles('pnpm-lock.yaml', 'tsconfig.base.json', 'jest.preset.js', 'jest.web-esm.workspace.ts', 'apps/web/jest.config.ts') }}-${{ github.run_id }}

            - name: Run Tier B/C validation commands
              run: node tools/coverage/check-coverage-policy.mjs --run-non-tier-a
              env:
                  CI: true
                  NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false

            - name: Upload unit coverage artifact
              if: always() && steps.scope.outputs.run == 'true'
              uses: actions/upload-artifact@v7
              with:
                  name: unit-coverage
                  path: |
                      coverage/merged/
                  retention-days: 14

            - name: Upload unit coverage to Codecov
              if: always() && steps.scope.outputs.run == 'true'
              uses: codecov/codecov-action@v7
              with:
                  files: ./coverage/merged/lcov.info,./coverage/merged/cobertura-coverage.xml
                  flags: unit
                  name: iptvnator-unit
                  fail_ci_if_error: false
                  handle_no_reports_found: true
                  disable_search: true
                  token: ${{ secrets.CODECOV_TOKEN }}