name: Docs Check

on:
  push:
    branches: ["**"]
    paths:
      - "**.md"
      - ".gitea/workflows/docs-check.yml"
  pull_request:
    branches: ["**"]
    paths:
      - "**.md"
      - ".gitea/workflows/docs-check.yml"

jobs:
  markdown-lint:
    name: Markdown lint
    runs-on: ubuntu-latest
    continue-on-error: true
    steps:
      - uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "22"

      - name: Install markdownlint-cli
        run: npm install -g markdownlint-cli

      - name: Lint all Markdown files
        run: markdownlint "**/*.md" --ignore node_modules

  mermaid-parse:
    name: Mermaid diagram parse check
    runs-on: ubuntu-latest
    continue-on-error: true
    steps:
      - uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "22"

      - name: Install mermaid
        run: npm install mermaid

      - name: Extract and validate Mermaid diagrams
        run: |
          cat > check-mermaid.mjs << 'SCRIPT'
          import { readFileSync, readdirSync } from 'fs';
          import { join } from 'path';
          import mermaid from './node_modules/mermaid/dist/mermaid.core.mjs';

          function findMdFiles(dir) {
            const out = [];
            for (const e of readdirSync(dir, { withFileTypes: true })) {
              const full = join(dir, e.name);
              if (e.isDirectory() && e.name !== 'node_modules' && !e.name.startsWith('.'))
                out.push(...findMdFiles(full));
              else if (e.isFile() && e.name.endsWith('.md'))
                out.push(full);
            }
            return out;
          }

          let errors = 0, total = 0;

          for (const mdFile of findMdFiles('.')) {
            const content = readFileSync(mdFile, 'utf8');
            const blocks = [...content.matchAll(/^```mermaid\n([\s\S]*?)^```/gm)];
            if (!blocks.length) continue;
            console.log(`\nChecking ${mdFile} (${blocks.length} diagram(s))`);
            for (let i = 0; i < blocks.length; i++) {
              total++;
              const diagram = blocks[i][1].trim();
              try {
                await mermaid.parse(diagram);
                console.log(`  [OK]  diagram ${i + 1}`);
              } catch (err) {
                const msg = String(err.message || err).split('\n')[0];
                console.error(`  [FAIL] diagram ${i + 1}: ${msg}`);
                console.log(`::warning file=${mdFile}::Mermaid diagram ${i + 1} failed: ${msg}`);
                errors++;
              }
            }
          }

          console.log(`\nTotal: ${total}. Failures: ${errors}`);
          if (errors > 0) {
            console.log(`::warning::${errors} Mermaid diagram(s) failed to parse.`);
            process.exit(1);
          }
          SCRIPT
          node check-mermaid.mjs