name: CI

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  workflow-guard-tests:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4

      - name: Validate self-hosted runner guards
        run: ./tests/test_ci_self_hosted_guard.sh

      - name: Validate create-dmg version pinning
        run: ./tests/test_ci_create_dmg_pinned.sh

      - name: Validate unit-test SwiftPM retry guard
        run: ./tests/test_ci_unit_test_spm_retry.sh

      - name: Validate cmux scheme test configuration
        run: ./tests/test_ci_scheme_testaction_debug.sh

  web-typecheck:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: web
    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4

      - name: Setup Bun
        uses: oven-sh/setup-bun@3d267786b128fe76c2f16a390aa2448b815359f3 # v2

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

      - name: Typecheck
        run: bun tsc --noEmit

  tests:
    # Never run self-hosted jobs for fork pull requests.
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
    runs-on: self-hosted
    concurrency:
      group: self-hosted-build
      cancel-in-progress: false
    steps:
      - name: Checkout
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
        with:
          submodules: recursive

      - name: Select Xcode
        run: |
          set -euo pipefail
          if [ -d "/Applications/Xcode.app/Contents/Developer" ]; then
            XCODE_DIR="/Applications/Xcode.app/Contents/Developer"
          else
            XCODE_APP="$(ls -d /Applications/Xcode*.app 2>/dev/null | head -n 1 || true)"
            if [ -n "$XCODE_APP" ]; then
              XCODE_DIR="$XCODE_APP/Contents/Developer"
            else
              echo "No Xcode.app found under /Applications" >&2
              exit 1
            fi
          fi
          echo "DEVELOPER_DIR=$XCODE_DIR" >> "$GITHUB_ENV"
          export DEVELOPER_DIR="$XCODE_DIR"
          xcodebuild -version
          xcrun --sdk macosx --show-sdk-path

      - name: Download Metal Toolchain
        run: xcodebuild -downloadComponent MetalToolchain

      - name: Build GhosttyKit.xcframework
        run: |
          set -euo pipefail
          if ! command -v zig >/dev/null 2>&1; then
            if command -v brew >/dev/null 2>&1; then
              brew install zig
            else
              echo "zig is required to build GhosttyKit.xcframework. Install zig and retry." >&2
              exit 1
            fi
          fi
          (cd ghostty && zig build -Demit-xcframework=true -Demit-macos-app=false)
          rm -rf GhosttyKit.xcframework
          cp -R ghostty/macos/GhosttyKit.xcframework GhosttyKit.xcframework
          test -d GhosttyKit.xcframework

      - name: Clean DerivedData
        run: |
          # Remove stale build cache to avoid incremental build errors
          rm -rf ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-*

      - name: Resolve Swift packages
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          rm -rf "$SOURCE_PACKAGES_DIR"
          mkdir -p "$SOURCE_PACKAGES_DIR"

          for attempt in 1 2 3; do
            if xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux-unit -configuration Debug \
              -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
              -resolvePackageDependencies; then
              exit 0
            fi
            if [ "$attempt" -eq 3 ]; then
              echo "Failed to resolve Swift packages after 3 attempts" >&2
              exit 1
            fi
            echo "Package resolution failed on attempt $attempt, retrying..."
            sleep $((attempt * 5))
          done

      - name: Run unit tests
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          run_unit_tests() {
            xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux-unit -configuration Debug \
              -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
              -disableAutomaticPackageResolution \
              -destination "platform=macOS" test 2>&1
          }

          # xcodebuild exits 65 even for expected failures (XCTExpectFailure).
          # Capture output and fail only if there are unexpected failures.
          set +e
          OUTPUT=$(run_unit_tests)
          EXIT_CODE=$?
          set -e

          # SwiftPM binary artifact resolution can occasionally fail on self-hosted
          # runners with "Could not resolve package dependencies". Retry once after
          # clearing SwiftPM/DerivedData caches to recover from transient corruption.
          if [ "$EXIT_CODE" -ne 0 ] && echo "$OUTPUT" | grep -q "Could not resolve package dependencies"; then
            echo "SwiftPM package resolution failed, clearing caches and retrying once"
            rm -rf ~/Library/Caches/org.swift.swiftpm
            rm -rf ~/Library/Developer/Xcode/DerivedData/GhosttyTabs-*
            set +e
            OUTPUT=$(run_unit_tests)
            EXIT_CODE=$?
            set -e
          fi

          echo "$OUTPUT"
          if [ "$EXIT_CODE" -ne 0 ]; then
            SUMMARY=$(echo "$OUTPUT" | grep "Executed.*tests.*with.*failures" | tail -1)
            if echo "$SUMMARY" | grep -q "(0 unexpected)"; then
              echo "All failures are expected, treating as pass"
            else
              echo "Unexpected test failures detected"
              exit 1
            fi
          fi

      - name: Run UI tests
        run: |
          set -euo pipefail
          SOURCE_PACKAGES_DIR="$PWD/.ci-source-packages"
          xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux -configuration Debug \
            -clonedSourcePackagesDirPath "$SOURCE_PACKAGES_DIR" \
            -disableAutomaticPackageResolution \
            -destination "platform=macOS" \
            -only-testing:cmuxUITests/UpdatePillUITests test