import { Controller, Get, Post, Put, Delete, Body, Param, Query, UseGuards, Request } from '@nestjs/common';
import { FinanceService } from './finance.service';
import { AuthGuard } from '@nestjs/passport';

@Controller('api/v1/finance')
export class FinanceController {
  constructor(private financeService: FinanceService) {}

  // 报销申请相关接口
  @UseGuards(AuthGuard('jwt'))
  @Post('expense-claims')
  async createExpenseClaim(@Body() data: any, @Request() req) {
    data.user_id = req.user.id;
    return this.financeService.createExpenseClaim(data);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('expense-claims')
  async getExpenseClaims(@Query() filter: any, @Request() req) {
    // 普通用户只能查看自己的报销申请
    if (req.user.role.name !== 'admin') {
      filter.user_id = req.user.id;
    }
    return this.financeService.getExpenseClaims(filter);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('expense-claims/:id')
  async getExpenseClaimById(@Param('id') id: string, @Request() req) {
    const expenseClaim = await this.financeService.getExpenseClaimById(id);
    // 普通用户只能查看自己的报销申请
    if (req.user.role.name !== 'admin' && expenseClaim.user_id !== req.user.id) {
      throw new Error('Access denied');
    }
    return expenseClaim;
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('expense-claims/:id/approve')
  async approveExpenseClaim(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.approveExpenseClaim(id, req.user.id, data.notes);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('expense-claims/:id/reject')
  async rejectExpenseClaim(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.rejectExpenseClaim(id, req.user.id, data.notes);
  }

  // 预支款相关接口
  @UseGuards(AuthGuard('jwt'))
  @Post('advance-payments')
  async createAdvancePayment(@Body() data: any, @Request() req) {
    data.user_id = req.user.id;
    return this.financeService.createAdvancePayment(data);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('advance-payments')
  async getAdvancePayments(@Query() filter: any, @Request() req) {
    // 普通用户只能查看自己的预支款
    if (req.user.role.name !== 'admin') {
      filter.user_id = req.user.id;
    }
    return this.financeService.getAdvancePayments(filter);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('advance-payments/:id')
  async getAdvancePaymentById(@Param('id') id: string, @Request() req) {
    const advancePayment = await this.financeService.getAdvancePaymentById(id);
    // 普通用户只能查看自己的预支款
    if (req.user.role.name !== 'admin' && advancePayment.user_id !== req.user.id) {
      throw new Error('Access denied');
    }
    return advancePayment;
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('advance-payments/:id/approve')
  async approveAdvancePayment(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.approveAdvancePayment(id, req.user.id, data.notes);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('advance-payments/:id/reject')
  async rejectAdvancePayment(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.rejectAdvancePayment(id, req.user.id, data.notes);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('advance-payments/:id/usage')
  async updateAdvancePaymentUsage(@Param('id') id: string, @Body() data: any, @Request() req) {
    const advancePayment = await this.financeService.getAdvancePaymentById(id);
    // 普通用户只能更新自己的预支款使用情况
    if (req.user.role.name !== 'admin' && advancePayment.user_id !== req.user.id) {
      throw new Error('Access denied');
    }
    return this.financeService.updateAdvancePaymentUsage(id, data.used_amount);
  }

  // 凭证相关接口
  @UseGuards(AuthGuard('jwt'))
  @Post('vouchers')
  async uploadVoucher(@Body() data: any, @Request() req) {
    data.uploaded_by = req.user.id;
    return this.financeService.uploadVoucher(data);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('vouchers')
  async getVouchers(@Query() filter: any) {
    return this.financeService.getVouchers(filter);
  }

  // 财务审批相关接口
  @UseGuards(AuthGuard('jwt'))
  @Post('approvals')
  async createFinanceApproval(@Body() data: any, @Request() req) {
    data.requester_id = req.user.id;
    return this.financeService.createFinanceApproval(data);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('approvals')
  async getFinanceApprovals(@Query() filter: any, @Request() req) {
    // 普通用户只能查看自己的审批请求
    if (req.user.role.name !== 'admin') {
      filter.requester_id = req.user.id;
    }
    return this.financeService.getFinanceApprovals(filter);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('approvals/:id/approve')
  async approveFinanceApproval(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.approveFinanceApproval(id, req.user.id, data.notes);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('approvals/:id/reject')
  async rejectFinanceApproval(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以审批
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.rejectFinanceApproval(id, req.user.id, data.notes);
  }

  // 公司账目管理接口
  @UseGuards(AuthGuard('jwt'))
  @Get('company-records')
  async getCompanyFinancialRecords(@Query() filter: any, @Request() req) {
    // 只有管理员可以查看公司账目
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.getCompanyFinancialRecords(filter);
  }

  // 项目财务记录接口
  @UseGuards(AuthGuard('jwt'))
  @Get('project-records/:projectId')
  async getProjectFinancialRecords(@Param('projectId') projectId: string) {
    return this.financeService.getProjectFinancialRecords(projectId);
  }

  // 员工个人记账接口
  @UseGuards(AuthGuard('jwt'))
  @Get('employee-records')
  async getEmployeeFinancialRecords(@Request() req) {
    return this.financeService.getEmployeeFinancialRecords(req.user.id);
  }

  // 汇率管理相关接口
  @UseGuards(AuthGuard('jwt'))
  @Get('currency-rates')
  async getCurrencyRates(@Request() req) {
    // 只有管理员可以查看汇率设置
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.getCurrencyRates();
  }

  @UseGuards(AuthGuard('jwt'))
  @Post('currency-rates')
  async createOrUpdateCurrencyRate(@Body() data: any, @Request() req) {
    // 只有管理员可以设置汇率
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.createOrUpdateCurrencyRate(data);
  }

  @UseGuards(AuthGuard('jwt'))
  @Put('currency-rates/:id/status')
  async updateCurrencyRateStatus(@Param('id') id: string, @Body() data: any, @Request() req) {
    // 只有管理员可以更新汇率状态
    if (req.user.role.name !== 'admin') {
      throw new Error('Access denied');
    }
    return this.financeService.updateCurrencyRateStatus(id, data.is_active);
  }

  @UseGuards(AuthGuard('jwt'))
  @Get('currencies')
  async getSupportedCurrencies() {
    return this.financeService.getSupportedCurrencies();
  }

  @UseGuards(AuthGuard('jwt'))
  @Post('convert-currency')
  async convertCurrency(@Body() data: any) {
    const { amount, from_currency, to_currency } = data;
    return this.financeService.convertCurrency(amount, from_currency, to_currency);
  }
}