#!/usr/bin/env node
/**
 * Generates openapi.json from JSDoc annotations in route files.
 * Run: node scripts/generate-openapi.mjs
 * Output: public/openapi.json
 */
import swaggerJsdoc from 'swagger-jsdoc';
import { writeFileSync } from 'fs';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';

const __dirname = dirname(fileURLToPath(import.meta.url));

const options = {
  definition: {
    openapi: '3.0.3',
    info: {
      title: 'DocFast API',
      version: '1.0.0',
      description: `Convert HTML, Markdown, and URLs to pixel-perfect PDFs. Built-in invoice & receipt templates.

## Authentication
All conversion and template endpoints require an API key via \`Authorization: Bearer <key>\` or \`X-API-Key: <key>\` header.

## Demo Endpoints
Try the API without signing up! Demo endpoints are public (no API key needed) but rate-limited to 5 requests/hour per IP and produce watermarked PDFs.

## Rate Limits
- Demo: 5 PDFs/hour per IP (watermarked)
- Pro tier: 5,000 PDFs/month, 30 req/min

All rate-limited endpoints return \`X-RateLimit-Limit\`, \`X-RateLimit-Remaining\`, and \`X-RateLimit-Reset\` headers. On \`429\`, a \`Retry-After\` header indicates seconds until the next allowed request.

## Getting Started
1. Try the demo at \`POST /v1/demo/html\` — no signup needed
2. Subscribe to Pro at [docfast.dev](https://docfast.dev/#pricing) for clean PDFs
3. Use your API key to convert documents`,
      contact: {
        name: 'DocFast',
        url: 'https://docfast.dev',
        email: 'support@docfast.dev'
      }
    },
    servers: [
      { url: 'https://docfast.dev', description: 'Production' }
    ],
    tags: [
      { name: 'Demo', description: 'Try the API without signing up — watermarked PDFs, rate-limited' },
      { name: 'Conversion', description: 'Convert HTML, Markdown, or URLs to PDF (requires API key)' },
      { name: 'Templates', description: 'Built-in document templates' },
      { name: 'Account', description: 'Key recovery and email management' },
      { name: 'Billing', description: 'Stripe-powered subscription management' },
      { name: 'System', description: 'Health checks and usage stats' }
    ],
    components: {
      securitySchemes: {
        BearerAuth: {
          type: 'http',
          scheme: 'bearer',
          description: 'API key as Bearer token'
        },
        ApiKeyHeader: {
          type: 'apiKey',
          in: 'header',
          name: 'X-API-Key',
          description: 'API key via X-API-Key header'
        }
      },
      headers: {
        'X-RateLimit-Limit': {
          description: 'The maximum number of requests allowed in the current time window',
          schema: {
            type: 'integer',
            example: 30
          }
        },
        'X-RateLimit-Remaining': {
          description: 'The number of requests remaining in the current time window',
          schema: {
            type: 'integer',
            example: 29
          }
        },
        'X-RateLimit-Reset': {
          description: 'Unix timestamp (seconds since epoch) when the rate limit window resets',
          schema: {
            type: 'integer',
            example: 1679875200
          }
        },
        'Retry-After': {
          description: 'Number of seconds to wait before retrying the request (returned on 429 responses)',
          schema: {
            type: 'integer',
            example: 60
          }
        }
      },
      schemas: {
        PdfOptions: {
          type: 'object',
          properties: {
            format: {
              type: 'string',
              enum: ['A4', 'Letter', 'Legal', 'A3', 'A5', 'Tabloid'],
              default: 'A4',
              description: 'Page size'
            },
            landscape: {
              type: 'boolean',
              default: false,
              description: 'Landscape orientation'
            },
            margin: {
              type: 'object',
              properties: {
                top: { type: 'string', description: 'Top margin (e.g. "10mm", "1in")', default: '0' },
                right: { type: 'string', description: 'Right margin', default: '0' },
                bottom: { type: 'string', description: 'Bottom margin', default: '0' },
                left: { type: 'string', description: 'Left margin', default: '0' }
              },
              description: 'Page margins'
            },
            printBackground: {
              type: 'boolean',
              default: true,
              description: 'Print background colors and images'
            },
            filename: {
              type: 'string',
              description: 'Custom filename for Content-Disposition header',
              default: 'document.pdf'
            }
          }
        },
        Error: {
          type: 'object',
          properties: {
            error: { type: 'string', description: 'Error message' }
          },
          required: ['error']
        }
      }
    }
  },
  apis: [
    join(__dirname, '../src/routes/*.ts'),
    join(__dirname, '../src/openapi-extra.yaml')
  ]
};

const spec = swaggerJsdoc(options);
const outPath = join(__dirname, '../public/openapi.json');
writeFileSync(outPath, JSON.stringify(spec, null, 2));
console.log(`✅ Generated ${outPath} (${Object.keys(spec.paths || {}).length} paths)`);