name: "CI: Check Docs"

on:
  pull_request:
    paths:
      # Cua Driver (Rust)
      - "libs/cua-driver/rust/crates/**"
      - "libs/cua-driver/rust/Cargo.toml"
      - "libs/cua-driver/rust/Cargo.lock"
      # Lume (Swift)
      - "libs/lume/src/**"
      # Cua CLI (TypeScript)
      - "libs/typescript/cua-cli/src/**"
      # MCP Server (Python)
      - "libs/python/mcp-server/src/**"
      # Computer SDK
      - "libs/python/computer/computer/**"
      - "libs/typescript/computer/src/**"
      # Agent SDK
      - "libs/python/agent/agent/**"
      - "libs/typescript/agent/src/**"
      # Cua-Bot
      - "libs/cuabot/src/**"
      # Documentation files themselves
      - "docs/content/docs/reference/cua-driver/**"
      - "docs/content/docs/cua/reference/**"
      - "docs/content/docs/cuabot/reference/**"
      # Generator scripts
      - "scripts/docs-generators/**"

jobs:
  check-docs-sync:
    name: Check Documentation Sync
    runs-on: macos-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # Need full history for git tags (version discovery) and changed file detection

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"

      - name: Install pnpm
        uses: pnpm/action-setup@v4

      - name: Install Node dependencies
        run: pnpm install
        working-directory: docs

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Install Python doc dependencies
        run: pip install -r scripts/docs-generators/requirements.txt

      - name: Determine changed generators
        id: changed
        run: |
          # Diff all commits in this PR against the base branch
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          CHANGED_FILES=$(git diff --name-only "$BASE_SHA" HEAD)
          echo "Changed files:"
          echo "$CHANGED_FILES"

          # Check which generators need to run
          GENERATORS=""

          # Source changes
          if echo "$CHANGED_FILES" | grep -q "^libs/cua-driver/rust/crates/\|^libs/cua-driver/rust/Cargo.toml\|^libs/cua-driver/rust/Cargo.lock\|^docs/content/docs/reference/cua-driver/"; then
            GENERATORS="$GENERATORS cua-driver"
          fi
          if echo "$CHANGED_FILES" | grep -q "^libs/lume/src/"; then
            GENERATORS="$GENERATORS lume"
          fi
          if echo "$CHANGED_FILES" | grep -q "^libs/typescript/cua-cli/src/"; then
            GENERATORS="$GENERATORS cua-cli"
          fi
          if echo "$CHANGED_FILES" | grep -q "^libs/python/mcp-server/src/"; then
            GENERATORS="$GENERATORS mcp-server"
          fi
          if echo "$CHANGED_FILES" | grep -q "^libs/python/computer/computer/\|^libs/python/agent/agent/"; then
            GENERATORS="$GENERATORS python-sdk"
          fi
          if echo "$CHANGED_FILES" | grep -q "^libs/cuabot/src/"; then
            GENERATORS="$GENERATORS cuabot"
          fi

          # Individual generator script changes — only trigger their own generator
          if echo "$CHANGED_FILES" | grep -q "^scripts/docs-generators/cua-driver\.ts"; then
            GENERATORS="$GENERATORS cua-driver"
          fi
          if echo "$CHANGED_FILES" | grep -q "^scripts/docs-generators/lume\.ts"; then
            GENERATORS="$GENERATORS lume"
          fi
          if echo "$CHANGED_FILES" | grep -q "^scripts/docs-generators/python-sdk\.ts"; then
            GENERATORS="$GENERATORS python-sdk"
          fi
          if echo "$CHANGED_FILES" | grep -q "^scripts/docs-generators/cuabot\.ts"; then
            GENERATORS="$GENERATORS cuabot"
          fi

          # Only runner.ts changes trigger all generators (it's the orchestration layer)
          # config.json changes only affect whichever generator scripts were also changed
          if echo "$CHANGED_FILES" | grep -qE "^scripts/docs-generators/runner\.ts$"; then
            GENERATORS="all"
          fi

          # Deduplicate
          GENERATORS=$(echo "$GENERATORS" | tr ' ' '\n' | sort -u | tr '\n' ' ' | xargs)

          echo "generators=$GENERATORS" >> $GITHUB_OUTPUT

      - name: Build cua-driver (if needed)
        if: contains(steps.changed.outputs.generators, 'cua-driver') || steps.changed.outputs.generators == 'all'
        run: cargo build -p cua-driver --release
        working-directory: libs/cua-driver/rust

      - name: Build Lume (if needed)
        if: contains(steps.changed.outputs.generators, 'lume') || steps.changed.outputs.generators == 'all'
        run: swift build -c release
        working-directory: libs/lume

      - name: Run documentation check
        run: |
          GENERATORS="${{ steps.changed.outputs.generators }}"

          if [ -z "$GENERATORS" ]; then
            echo "No documentation-related changes detected."
            exit 0
          fi

          if [ "$GENERATORS" = "all" ]; then
            npx tsx scripts/docs-generators/runner.ts --check
          else
            for gen in $GENERATORS; do
              echo "Checking generator: $gen"
              npx tsx scripts/docs-generators/runner.ts --library "$gen" --check
            done
          fi
        working-directory: .

      - name: Show help if check failed
        if: failure()
        run: |
          echo ""
          echo "╔═══════════════════════════════════════════════════════════════════════╗"
          echo "║                    Documentation Out of Sync!                        ║"
          echo "╠═══════════════════════════════════════════════════════════════════════╣"
          echo "║                                                                      ║"
          echo "║  The documentation has drifted from the source code.                 ║"
          echo "║                                                                      ║"
          echo "║  To regenerate all docs, run from the repository root:               ║"
          echo "║                                                                      ║"
          echo "║    npx tsx scripts/docs-generators/runner.ts                         ║"
          echo "║                                                                      ║"
          echo "║  Or for a specific library:                                          ║"
          echo "║                                                                      ║"
          echo "║    npx tsx scripts/docs-generators/runner.ts --library lume          ║"
          echo "║    npx tsx scripts/docs-generators/runner.ts --library python-sdk    ║"
          echo "║    npx tsx scripts/docs-generators/runner.ts --library cuabot        ║"
          echo "║                                                                      ║"
          echo "║  For versioned docs and changelogs (after tagging a new release):    ║"
          echo "║                                                                      ║"
          echo "║    npx tsx scripts/docs-generators/generate-versioned-docs.ts        ║"
          echo "║    npx tsx scripts/docs-generators/generate-changelog.ts             ║"
          echo "║                                                                      ║"
          echo "║  Then commit the updated documentation files.                        ║"
          echo "║                                                                      ║"
          echo "╚═══════════════════════════════════════════════════════════════════════╝"