import { NextResponse } from 'next/server'

const BASE_URL = process.env.NEXT_PUBLIC_APP_URL || 'https://open-prompt.netlify.app'

/**
 * GET /api/v1
 * API overview — returns available endpoints, rate limits, and usage info.
 */
export async function GET() {
    return NextResponse.json({
        name: 'OpenPrompt Public API',
        version: '1.0.0',
        baseUrl: `${BASE_URL}/api/v1`,
        documentation: `${BASE_URL}/docs/api`,
        rateLimits: {
            guest: '10 requests / hour per IP',
            authenticated: '50 requests / hour per user',
            pro: '500 requests / hour per user',
        },
        endpoints: [
            {
                method: 'GET',
                path: '/api/v1/prompts',
                description: 'List public prompts',
                params: ['q', 'category', 'tags', 'sort', 'page', 'limit'],
            },
            {
                method: 'GET',
                path: '/api/v1/prompts/:slug',
                description: 'Get a single prompt by slug',
            },
            {
                method: 'POST',
                path: '/api/v1/prompts/:slug/run',
                description: 'Execute a prompt with variables',
                body: { variables: 'object', model: 'string (optional)', stream: 'boolean (optional)' },
            },
            {
                method: 'GET',
                path: '/api/v1/tools',
                description: 'List all AI tools',
                params: ['category', 'q', 'limit'],
            },
        ],
        authentication: {
            note: 'Authentication not required for public endpoints. Rate limits apply per IP.',
            future: 'API key authentication coming soon — sign up at ' + BASE_URL,
        },
    }, {
        headers: {
            'Cache-Control': 'public, s-maxage=3600',
        },
    })
}