#!/usr/bin/env tsx

/**
 * 手动减仓脚本
 * 用于紧急情况下快速降低保证金使用率
 */

import { PacificaAPIService } from '../src/services/PacificaAPIService';
import { readFileSync } from 'fs';
import { v4 as uuidv4 } from 'uuid';

interface AccountConfig {
  name: string;
  privateKey: string;
  publicKey: string;
}

async function reducePositions() {
  console.log('🚨 紧急减仓程序启动...\n');

  // 减仓比例
  const REDUCTION_RATIO = 0.5; // 50%

  // 加载账户配置
  const accountsConfig: AccountConfig[] = JSON.parse(
    readFileSync('./config/accounts.json', 'utf-8')
  );

  for (const accountConfig of accountsConfig) {
    console.log(`\n${'='.repeat(60)}`);
    console.log(`📋 处理账户: ${accountConfig.name}`);
    console.log(`${'='.repeat(60)}\n`);

    const apiService = new PacificaAPIService(accountConfig.privateKey);

    try {
      // 获取账户信息
      const accountInfo = await apiService.getAccountInfo();
      const equity = parseFloat(accountInfo.account_equity);
      const marginUsed = parseFloat(accountInfo.total_margin_used);
      const marginUsagePercent = equity > 0 ? (marginUsed / equity * 100).toFixed(2) : 'N/A';

      console.log(`💰 当前保证金使用率: ${marginUsagePercent}%`);
      console.log(`   账户权益: ${equity.toFixed(2)} USDC`);
      console.log(`   已使用保证金: ${marginUsed.toFixed(2)} USDC\n`);

      // 获取持仓
      const positions = await apiService.getPositions();

      if (positions.length === 0) {
        console.log('✅ 没有持仓需要减仓\n');
        continue;
      }

      console.log(`📈 当前持仓数量: ${positions.length}`);
      console.log(`📉 将减仓 ${(REDUCTION_RATIO * 100).toFixed(0)}%\n`);

      // 对每个持仓执行减仓
      for (const position of positions) {
        const originalAmount = parseFloat(position.amount);
        const rawReduceAmount = originalAmount * REDUCTION_RATIO;

        // 确保满足最小订单要求和 lot size 倍数
        const LOT_SIZE = 0.00001;
        const MIN_ORDER_SIZE = 0.00001;

        // 向下取整到 lot size 的倍数
        const reduceAmount = Math.floor(rawReduceAmount / LOT_SIZE) * LOT_SIZE;

        if (reduceAmount < MIN_ORDER_SIZE) {
          console.log(`⚠️  ${position.symbol} 持仓太小，跳过减仓`);
          continue;
        }

        try {
          console.log(`🔄 ${position.symbol}:`);
          console.log(`   当前仓位: ${originalAmount} (${position.side === 'bid' ? '多' : '空'})`);
          console.log(`   减仓数量: ${reduceAmount.toFixed(5)}`);

          // 平仓订单：使用相反方向的市价单
          const closeSide = position.side === 'bid' ? 'ask' : 'bid';

          // 格式化amount，去掉多余的0
          const formattedAmount = parseFloat(reduceAmount.toFixed(5)).toString();

          const order = {
            symbol: position.symbol,
            amount: formattedAmount,
            side: closeSide,
            slippage_percent: '1.0', // 紧急平仓，允许较大滑点
            reduce_only: true,
            client_order_id: uuidv4()
          };

          const result = await apiService.createMarketOrder(order);

          console.log(`   ✅ 减仓成功！`);
          console.log(`   订单ID: ${result.order_id || 'N/A'}`);

          // 短暂延迟避免API限流
          await new Promise(resolve => setTimeout(resolve, 2000));

        } catch (error) {
          console.error(`   ❌ 减仓失败:`, error instanceof Error ? error.message : error);
        }
      }

      // 再次检查保证金使用率
      await new Promise(resolve => setTimeout(resolve, 2000));
      const updatedAccountInfo = await apiService.getAccountInfo();
      const updatedEquity = parseFloat(updatedAccountInfo.account_equity);
      const updatedMarginUsed = parseFloat(updatedAccountInfo.total_margin_used);
      const updatedMarginUsagePercent = updatedEquity > 0
        ? (updatedMarginUsed / updatedEquity * 100).toFixed(2)
        : 'N/A';

      console.log(`\n✅ 减仓完成`);
      console.log(`   新的保证金使用率: ${updatedMarginUsagePercent}%`);
      console.log(`   账户权益: ${updatedEquity.toFixed(2)} USDC`);
      console.log(`   已使用保证金: ${updatedMarginUsed.toFixed(2)} USDC`);

    } catch (error) {
      console.error(`❌ 处理账户失败:`, error instanceof Error ? error.message : error);
    }

    // 延迟避免限流
    await new Promise(resolve => setTimeout(resolve, 3000));
  }

  console.log(`\n${'='.repeat(60)}`);
  console.log('✅ 减仓程序完成');
  console.log(`${'='.repeat(60)}\n`);
}

reducePositions().catch(console.error);