// README generator
import { writeFile, mkdir } from 'node:fs/promises';
import { join } from 'node:path';
import { BaseService } from '@/core/base/BaseService.js';

export class ReadmeGenerator extends BaseService {
  constructor() {
    super('ReadmeGenerator');
  }

  async generateReadme(outputDir: string): Promise<void> {
    await this.executeWithErrorHandling(async () => {
      this.log('Generating build README...');

      // Ensure output directory exists
      await mkdir(outputDir, { recursive: true });

      const content = this.generateReadmeContent();
      const filePath = join(outputDir, 'README.md');

      await writeFile(filePath, content, 'utf-8');
      this.log('Generated build README.md');
    }, 'build README generation');
  }

  private generateReadmeContent(): string {
    const currentDateTime = new Date().toISOString();

    return `# Web Font CDN

Generated on: ${currentDateTime}
Source: [guanqr/fonts](https://github.com/guanqr/fonts)

## Quick Start

Add the following links to your HTML head section to use these fonts:

### All Fonts (Recommended)
\`\`\`html
<!-- Minified CSS with all fonts -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/fonts.min.css">

<!-- Unminified CSS with all fonts -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/fonts.css">
\`\`\`

### Individual Fonts

#### I.Ming CP (Traditional Chinese Serif)
\`\`\`html
<!-- Minified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/imingcp.min.css">

<!-- Unminified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/imingcp.css">
\`\`\`

#### LXGW WenKai TC (Traditional Chinese Handwriting, Light Weight Only)
\`\`\`html
<!-- Minified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/lxgwwenkaitc.min.css">

<!-- Unminified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/lxgwwenkaitc.css">
\`\`\`

#### Amstelvar (Latin Variable Font)
\`\`\`html
<!-- Minified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/amstelvar.min.css">

<!-- Unminified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/amstelvar.css">
\`\`\`

#### JetBrains Mono (Monospace Developer Font)
\`\`\`html
<!-- Minified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/jetbrainsmono.min.css">

<!-- Unminified -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/guanqr/fonts@build/css/jetbrainsmono.css">
\`\`\`

## Usage in CSS

After including the CSS files, you can use the fonts in your stylesheets:

\`\`\`css
/* Traditional Chinese Serif */
.serif-text {
  font-family: 'I.MingCP', serif;
}

/* Traditional Chinese Handwriting */
.handwriting-text {
  font-family: 'LXGW WenKai TC', cursive;
  font-weight: 300;
}

/* Latin Variable Font */
.variable-text {
  font-family: 'Amstelvar', serif;
  font-variation-settings: 'wght' 400, 'wdth' 100, 'opsz' 14;
}

/* Monospace Developer Font */
.code-text {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
}
\`\`\`

## Directory Structure

\`\`\`
css/                   # CSS files with @font-face declarations
├── fonts.css         # All fonts (unminified)
├── fonts.min.css     # All fonts (minified)
├── imingcp.css       # I.Ming CP (unminified)
├── imingcp.min.css   # I.Ming CP (minified)
├── lxgwwenkaitc.css  # LXGW WenKai TC (unminified)
├── lxgwwenkaitc.min.css # LXGW WenKai TC (minified)
├── amstelvar.css     # Amstelvar (unminified)
├── amstelvar.min.css # Amstelvar (minified)
├── jetbrainsmono.css      # JetBrains Mono (unminified)
└── jetbrainsmono.min.css  # JetBrains Mono (minified)

fonts/                # Font files (.woff2 format)
├── imingcp/          # I.Ming CP chunks
├── lxgwwenkaitc/     # LXGW WenKai TC chunks
├── amstelvar/        # Amstelvar chunks
└── jetbrainsmono/    # JetBrains Mono chunks

LICENSE.md            # License information for all fonts
LICENSE.json          # Machine-readable license data
\`\`\`

## License

Please refer to [LICENSE.md](./LICENSE.md) for detailed license information of each font.

## Updates

This repository is automatically updated weekly to check for new font versions. The build is triggered when changes are detected.

For more information, visit the [source repository](https://github.com/guanqr/fonts).
`;
  }
}