name: Docs CI

# Workflow for documentation quality checks
# Combines dead link checking and quality improvements

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

on:
  pull_request:
    types: [opened, ready_for_review]
    paths:
      - "packages/docs/**/*.mdx"
      - "packages/docs/**/*.md"
      - "packages/docs/docs.json"
      - "packages/docs/mint.json"

  # Allow manual triggering
  workflow_dispatch:
    inputs:
      check_type:
        description: "Type of check to run"
        required: true
        type: choice
        options:
          - all
          - links
          - quality

permissions:
  contents: write
  pull-requests: write
  issues: write
  id-token: write

jobs:
  # ===========================================
  # Check Dead Links
  # ===========================================
  check-links:
    if: |
      github.event.pull_request.draft != true &&
      (github.event.inputs.check_type == 'all' || github.event.inputs.check_type == 'links' || github.event.inputs.check_type == '')

    runs-on: ${{ fromJSON(vars.HETZNER_FLEET_ONLINE == 'false' && '["ubuntu-24.04"]' || '["self-hosted","hetzner-robot"]') }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
        with:
          fetch-depth: 0
          filter: blob:none
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Git
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

      - name: Check and Fix Dead Links with Claude
        id: claude-fix-links
        # Don't fail docs CI when the Anthropic API is unavailable (low
        # credit balance, rate limit, transient outage). The fix pass is
        # best-effort; downstream "Check for Changes" steps already handle
        # the no-op path.
        continue-on-error: true
        uses: anthropics/claude-code-action@ba0aafd4308cbba7165f9f2cdb0cfbed5a3c99ce
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

          prompt: |
            Check all links in the packages/docs/ directory for broken or dead links.

            **Instructions:**
            1. Scan all MDX and MD files in packages/docs/
            2. Check for internal relative links, external links, and anchor links
            3. For each broken link found:
               - Typos: Correct the spelling/path
               - Moved files: Update to new location
               - Missing anchors: Remove or update to valid anchor
               - External 404s: Comment out with explanation

            **Link Checking Rules:**
            - Internal links should point to existing files in packages/docs/
            - Skip checking localhost and example.com links
            - Use fuzzy matching (85% threshold) for path corrections

            **Output:** Report findings but only make high-confidence fixes.

          claude_args: |
            --model claude-sonnet-4-6
            --allowedTools "Bash(find packages/docs -name '*.mdx' -o -name '*.md'),Bash(grep -n),Bash(curl -s -o /dev/null -w '%{http_code}'),Read,EditFile(packages/docs/*)"

      - name: Check for Changes
        id: check-link-changes
        run: |
          if [ -n "$(git status --porcelain packages/docs/)" ]; then
            echo "changes=true" >> $GITHUB_OUTPUT
          else
            echo "changes=false" >> $GITHUB_OUTPUT
          fi

      - name: Commit Link Fixes
        if: steps.check-link-changes.outputs.changes == 'true'
        run: |
          git add packages/docs/
          git commit -m "fix(docs): automated broken link fixes [skip ci]" || true

  # ===========================================
  # Check Documentation Quality
  # ===========================================
  check-quality:
    if: |
      github.event.pull_request.draft != true &&
      (github.event.inputs.check_type == 'all' || github.event.inputs.check_type == 'quality' || github.event.inputs.check_type == '')

    runs-on: ${{ fromJSON(vars.HETZNER_FLEET_ONLINE == 'false' && '["ubuntu-24.04"]' || '["self-hosted","hetzner-robot"]') }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
        with:
          fetch-depth: 0
          filter: blob:none
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Git
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

      - name: Check and Fix Quality Issues with Claude
        id: claude-fix-quality
        # Don't fail docs CI when the Anthropic API is unavailable (low
        # credit balance, rate limit, transient outage). The fix pass is
        # best-effort; downstream "Check for Changes" steps already handle
        # the no-op path.
        continue-on-error: true
        uses: anthropics/claude-code-action@ba0aafd4308cbba7165f9f2cdb0cfbed5a3c99ce
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}

          prompt: |
            Check all MDX files in packages/docs/ for quality issues.

            **Quality Checks:**
            1. Double Header Issues - MDX files with frontmatter title AND H1 heading
            2. Missing frontmatter fields (title or description)
            3. Inconsistent heading hierarchy (H3 following H1 without H2)
            4. Code blocks without language tags

            **For Double Headers:**
            - Remove the H1 heading from content (keep only frontmatter title)
            - Mintlify auto-generates H1 from frontmatter

            **Fix Application Rules:**
            - Make minimal, precise changes
            - Preserve all content except what needs fixing
            - Maintain proper MDX formatting

            **Output:** Report findings and apply fixes.

          claude_args: |
            --model claude-sonnet-4-6
            --allowedTools "Bash(find packages/docs -name '*.mdx'),Bash(grep -n),Read,EditFile(packages/docs/*)"

      - name: Check for Changes
        id: check-quality-changes
        run: |
          if [ -n "$(git status --porcelain packages/docs/)" ]; then
            echo "changes=true" >> $GITHUB_OUTPUT
          else
            echo "changes=false" >> $GITHUB_OUTPUT
          fi

      - name: Commit Quality Fixes
        if: steps.check-quality-changes.outputs.changes == 'true'
        run: |
          git add packages/docs/
          git commit -m "fix(docs): automated documentation quality improvements [skip ci]" || true

  # ===========================================
  # Create PR with all fixes
  # ===========================================
  create-pr:
    needs: [check-links, check-quality]
    if: always() && (needs.check-links.result == 'success' || needs.check-quality.result == 'success')
    runs-on: ${{ fromJSON(vars.HETZNER_FLEET_ONLINE == 'false' && '["ubuntu-24.04"]' || '["self-hosted","hetzner-robot"]') }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
        with:
          fetch-depth: 0
          filter: blob:none
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Check for any uncommitted changes
        id: final-check
        run: |
          git fetch origin
          if [ -n "$(git status --porcelain packages/docs/)" ]; then
            echo "changes=true" >> $GITHUB_OUTPUT
          else
            echo "changes=false" >> $GITHUB_OUTPUT
          fi

      - name: Create Fix Branch and PR
        if: steps.final-check.outputs.changes == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BRANCH_NAME="fix/docs-ci-$(date +%Y%m%d-%H%M%S)"
          git checkout -b "$BRANCH_NAME"
          git add packages/docs/
          git commit -m "fix(docs): automated documentation fixes" \
                     -m "- Fixed broken links" \
                     -m "- Fixed quality issues" || exit 0

          git push origin "$BRANCH_NAME"

          gh pr create \
            --title "fix(docs): automated documentation fixes" \
            --body "## Automated Documentation Fixes

          This PR contains automated fixes for documentation issues.

          ### Changes Made:
          - 🔗 Fixed broken links
          - 📝 Fixed quality issues (double headers, missing frontmatter, etc.)

          ### Review Instructions:
          Please verify all changes are correct before merging.

          ---
          *Generated by docs-ci workflow*" \
            --base main \
            --head "$BRANCH_NAME" \
            --label "documentation" \
            --label "automated"