#!/usr/bin/env node
/**
 * Agentic Flow - Standalone Anthropic Proxy Server
 *
 * Run Gemini, OpenRouter, or other providers through an Anthropic-compatible proxy
 * for use with Claude Code, Cursor, and other tools that support ANTHROPIC_BASE_URL
 *
 * Usage:
 *   npx agentic-flow proxy --provider gemini --port 3000
 *   npx agentic-flow proxy --provider openrouter --model "openai/gpt-4o-mini" --port 3000
 *
 * Then in Claude Code or Cursor:
 *   export ANTHROPIC_BASE_URL=http://localhost:3000
 *   export ANTHROPIC_API_KEY=sk-ant-proxy-dummy-key  # Any value works
 */
import dotenv from 'dotenv';
import { parseArgs } from 'util';
import { AnthropicToGeminiProxy } from './proxy/anthropic-to-gemini.js';
import { AnthropicToOpenRouterProxy } from './proxy/anthropic-to-openrouter.js';
// Load environment variables
dotenv.config();
function parseArguments() {
    const { values } = parseArgs({
        options: {
            provider: {
                type: 'string',
                short: 'p',
                default: 'gemini'
            },
            port: {
                type: 'string',
                short: 'P',
                default: '3000'
            },
            model: {
                type: 'string',
                short: 'm'
            },
            help: {
                type: 'boolean',
                short: 'h'
            }
        },
        strict: false,
        allowPositionals: true
    });
    if (values.help) {
        console.log(`
Agentic Flow - Standalone Anthropic Proxy Server

USAGE:
  npx agentic-flow proxy [OPTIONS]

OPTIONS:
  -p, --provider <provider>   Provider to use (gemini, openrouter) [default: gemini]
  -P, --port <port>           Port to run proxy on [default: 3000]
  -m, --model <model>         Model to use (provider-specific)
  -h, --help                  Show this help message

ENVIRONMENT VARIABLES:
  GOOGLE_GEMINI_API_KEY       Required for Gemini provider
  OPENROUTER_API_KEY          Required for OpenRouter provider
  COMPLETION_MODEL            Default model (optional)

EXAMPLES:
  # Start Gemini proxy on port 3000
  npx agentic-flow proxy --provider gemini --port 3000

  # Start OpenRouter proxy with GPT-4o-mini
  npx agentic-flow proxy --provider openrouter --model "openai/gpt-4o-mini"

  # Use with Claude Code
  export ANTHROPIC_BASE_URL=http://localhost:3000
  export ANTHROPIC_API_KEY=sk-ant-proxy-dummy-key
  claude  # Claude Code will now use the proxy

  # Use with Cursor (when ANTHROPIC_BASE_URL support is added)
  export ANTHROPIC_BASE_URL=http://localhost:3000
  export ANTHROPIC_API_KEY=sk-ant-proxy-dummy-key
`);
        process.exit(0);
    }
    const provider = (values.provider || 'gemini');
    const port = parseInt(values.port || '3000');
    const model = values.model;
    if (!['gemini', 'openrouter'].includes(provider)) {
        console.error(`❌ Error: Invalid provider "${provider}". Must be "gemini" or "openrouter"`);
        process.exit(1);
    }
    if (isNaN(port) || port < 1 || port > 65535) {
        console.error(`❌ Error: Invalid port "${values.port}". Must be 1-65535`);
        process.exit(1);
    }
    return { provider, port, model };
}
async function startProxy(options) {
    console.log(`
╔═══════════════════════════════════════════════════════╗
║   Agentic Flow - Standalone Anthropic Proxy Server    ║
╚═══════════════════════════════════════════════════════╝
`);
    if (options.provider === 'gemini') {
        const apiKey = process.env.GOOGLE_GEMINI_API_KEY;
        if (!apiKey) {
            console.error(`
❌ Error: GOOGLE_GEMINI_API_KEY environment variable required

Set it with:
  export GOOGLE_GEMINI_API_KEY=your-key-here

Or create a .env file:
  GOOGLE_GEMINI_API_KEY=your-key-here
`);
            process.exit(1);
        }
        const model = options.model || process.env.COMPLETION_MODEL || 'gemini-2.0-flash-exp';
        console.log(`🚀 Starting Gemini → Anthropic Proxy
📍 Port: ${options.port}
🤖 Model: ${model}
🔗 Gemini API: https://generativelanguage.googleapis.com
`);
        const proxy = new AnthropicToGeminiProxy({
            geminiApiKey: apiKey,
            defaultModel: model
        });
        proxy.start(options.port);
        console.log(`
✅ Proxy server running!

Configure Claude Code:
  export ANTHROPIC_BASE_URL=http://localhost:${options.port}
  export ANTHROPIC_API_KEY=sk-ant-proxy-dummy-key
  claude

Configure Cursor (when supported):
  Settings → API Keys → Anthropic Base URL: http://localhost:${options.port}
  API Key: sk-ant-proxy-dummy-key

Cost Savings: ~85% vs direct Anthropic API
Rate Limits: Gemini free tier = 10 req/min
`);
    }
    else if (options.provider === 'openrouter') {
        const apiKey = process.env.OPENROUTER_API_KEY;
        if (!apiKey) {
            console.error(`
❌ Error: OPENROUTER_API_KEY environment variable required

Set it with:
  export OPENROUTER_API_KEY=sk-or-v1-your-key-here

Get your key at: https://openrouter.ai/keys
`);
            process.exit(1);
        }
        const model = options.model || process.env.COMPLETION_MODEL || 'deepseek/deepseek-chat';
        console.log(`🚀 Starting OpenRouter → Anthropic Proxy
📍 Port: ${options.port}
🤖 Model: ${model}
🔗 OpenRouter API: https://openrouter.ai/api/v1
`);
        const proxy = new AnthropicToOpenRouterProxy({
            openrouterApiKey: apiKey,
            defaultModel: model
        });
        proxy.start(options.port);
        console.log(`
✅ Proxy server running!

Configure Claude Code:
  export ANTHROPIC_BASE_URL=http://localhost:${options.port}
  export ANTHROPIC_API_KEY=sk-ant-proxy-dummy-key
  claude

Configure Cursor (when supported):
  Settings → API Keys → Anthropic Base URL: http://localhost:${options.port}
  API Key: sk-ant-proxy-dummy-key

Cost Savings: ~90% vs direct Anthropic API
Popular Models:
  - openai/gpt-4o-mini (fast, cheap)
  - anthropic/claude-3.5-sonnet (via OpenRouter)
  - meta-llama/llama-3.1-405b-instruct (OSS)
`);
    }
    // Keep process running
    process.on('SIGINT', () => {
        console.log('\n\n👋 Shutting down proxy server...');
        process.exit(0);
    });
}
// Main execution
const options = parseArguments();
startProxy(options).catch(error => {
    console.error('❌ Fatal error:', error.message);
    process.exit(1);
});
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