name: CI

on:
  push:
    branches:
      - main
  pull_request:

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

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

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

      - name: Typecheck
        run: bun tsc --noEmit

  ui-tests:
    runs-on: self-hosted
    concurrency:
      group: self-hosted-build
      cancel-in-progress: false
    steps:
      - name: Checkout
        uses: actions/checkout@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: 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 -Dxcframework-target=native)
          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: Run UI tests
        run: |
          set -euo pipefail
          # Policy: run macOS UI tests in the UTM VM (never on the host runner). Host GUI
          # state is frequently non-interactive on CI and causes false failures.
          vm_user="${CMUX_VM_USER:-cmux}"
          ssh_opts=(
            -o BatchMode=yes
            -o StrictHostKeyChecking=no
            -o UserKnownHostsFile=/dev/null
            -o ConnectTimeout=5
            -o ConnectionAttempts=1
            -o NumberOfPasswordPrompts=0
            -o PreferredAuthentications=publickey
            -o PubkeyAuthentication=yes
            -o PasswordAuthentication=no
            -o KbdInteractiveAuthentication=no
            -o ChallengeResponseAuthentication=no
            -o GSSAPIAuthentication=no
            -o LogLevel=ERROR
          )

          vm_candidates=()
          if [ -n "${CMUX_VM_HOST:-}" ]; then
            vm_candidates+=("$CMUX_VM_HOST")
          else
            vm_candidates+=("cmux-vm" "cmux-vm.local" "192.168.64.73")
          fi

          vm_host=""
          for h in "${vm_candidates[@]}"; do
            if ssh "${ssh_opts[@]}" "$vm_user@$h" 'true' >/dev/null 2>&1; then
              vm_host="$h"
              break
            fi
          done
          if [ -z "$vm_host" ]; then
            echo "ERROR: Could not SSH into the UI-test VM; UI tests are required."
            echo "Tried:"
            for h in "${vm_candidates[@]}"; do
              echo "  - $vm_user@$h"
            done
            echo "Fix: set CMUX_VM_HOST (repo secret or runner env), or add a working 'cmux-vm' Host entry in ~/.ssh/config on the self-hosted runner."
            exit 1
          fi

          echo "Running UI tests on $vm_user@$vm_host..."
          rsync -e "ssh ${ssh_opts[*]}" -a --delete \
            --exclude build \
            --exclude .git \
            --exclude "GhosttyTabs.xcodeproj/project.xcworkspace" \
            ./ "$vm_user@$vm_host":/Users/cmux/GhosttyTabs/
          ssh "${ssh_opts[@]}" "$vm_user@$vm_host" 'cd /Users/cmux/GhosttyTabs && xcodebuild -project GhosttyTabs.xcodeproj -scheme cmux -configuration Debug -destination "platform=macOS" -only-testing:GhosttyTabsUITests/UpdatePillUITests test'