/**
 * 转让钱包内部 API（纯新增）
 * 供 transfer-service Saga 编排器通过 HTTP 调用
 *
 * 路由前缀：/api/v1/internal/wallet/*
 * 与 InternalWalletController(/api/v1/wallets/*) 分开，避免路由冲突
 *
 * 回滚方式：删除此文件并从 api.module.ts 中移除引用
 */

import { Controller, Post, Get, Body, Param, Logger } from '@nestjs/common';
import { ApiTags } from '@nestjs/swagger';
import { WalletApplicationService } from '@/application/services';
import {
  FreezeForTransferCommand,
  UnfreezeForTransferCommand,
  SettleTransferPaymentCommand,
} from '@/application/commands';
import { Public } from '@/shared/decorators';
import {
  FreezeForTransferDto,
  UnfreezeForTransferDto,
  SettleTransferDto,
} from '../dto/request/transfer-wallet.dto';

@ApiTags('Internal Transfer Wallet API')
@Controller('internal/wallet')
export class InternalTransferWalletController {
  private readonly logger = new Logger(InternalTransferWalletController.name);

  constructor(
    private readonly walletService: WalletApplicationService,
  ) {}

  /**
   * 冻结买方资金
   * POST /api/v1/internal/wallet/freeze
   */
  @Post('freeze')
  @Public()
  async freezeForTransfer(@Body() dto: FreezeForTransferDto): Promise<{ freezeId: string }> {
    this.logger.log(`[freeze] Request: accountSequence=${dto.accountSequence}, amount=${dto.amount}, transferOrderNo=${dto.transferOrderNo}`);

    const command = new FreezeForTransferCommand(
      dto.accountSequence,
      dto.amount,
      dto.transferOrderNo,
      dto.reason,
    );

    const result = await this.walletService.freezeForTransfer(command);
    this.logger.log(`[freeze] Success: freezeId=${result.freezeId}`);
    return result;
  }

  /**
   * 解冻买方资金（补偿/回滚）
   * POST /api/v1/internal/wallet/unfreeze
   */
  @Post('unfreeze')
  @Public()
  async unfreezeForTransfer(@Body() dto: UnfreezeForTransferDto): Promise<{ success: boolean }> {
    this.logger.log(`[unfreeze] Request: accountSequence=${dto.accountSequence}, freezeId=${dto.freezeId}, transferOrderNo=${dto.transferOrderNo}`);

    const command = new UnfreezeForTransferCommand(
      dto.accountSequence,
      dto.freezeId,
      dto.transferOrderNo,
      dto.reason,
    );

    await this.walletService.unfreezeForTransfer(command);
    this.logger.log(`[unfreeze] Success: transferOrderNo=${dto.transferOrderNo}`);
    return { success: true };
  }

  /**
   * 结算转让资金：买方冻结扣减 → 卖方入账 → 手续费归集
   * POST /api/v1/internal/wallet/settle-transfer
   */
  @Post('settle-transfer')
  @Public()
  async settleTransfer(@Body() dto: SettleTransferDto): Promise<{ success: boolean }> {
    this.logger.log(`[settle-transfer] Request: buyer=${dto.buyerAccountSequence}, seller=${dto.sellerAccountSequence}, transferOrderNo=${dto.transferOrderNo}`);

    const command = new SettleTransferPaymentCommand(
      dto.buyerAccountSequence,
      dto.sellerAccountSequence,
      dto.freezeId,
      dto.sellerReceiveAmount,
      dto.platformFeeAmount,
      dto.transferOrderNo,
    );

    await this.walletService.settleTransferPayment(command);
    this.logger.log(`[settle-transfer] Success: transferOrderNo=${dto.transferOrderNo}`);
    return { success: true };
  }

  /**
   * 查询钱包余额
   * GET /api/v1/internal/wallet/balance/:accountSequence
   */
  @Get('balance/:accountSequence')
  @Public()
  async getBalance(@Param('accountSequence') accountSequence: string): Promise<{
    available: string;
    frozen: string;
  }> {
    const query = { userId: accountSequence } as any;
    const wallet = await this.walletService.getMyWallet(query);
    return {
      available: wallet.balances.usdt.available.toString(),
      frozen: wallet.balances.usdt.frozen.toString(),
    };
  }
}