package com.accounting.controller;

import com.accounting.dto.BudgetRequest;
import com.accounting.dto.BudgetResponse;
import com.accounting.dto.BudgetSettlementResponse;
import com.accounting.entity.User;
import com.accounting.mapper.UserMapper;
import com.accounting.service.BudgetService;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDate;

@Tag(name = "预算管理", description = "预算管理接口")
@RestController
@RequestMapping("/api/budgets")
public class BudgetController {
    
    @Autowired
    private BudgetService budgetService;
    
    @Autowired
    private UserMapper userMapper;
    
    @Operation(summary = "获取当前月份的预算信息")
    @GetMapping
    public ResponseEntity<BudgetResponse> getBudget(Authentication authentication) {
        Long userId = getUserId(authentication);
        LocalDate today = LocalDate.now();
        BudgetResponse response = budgetService.getBudgetWithStatistics(userId, today.getYear(), today.getMonthValue());
        return ResponseEntity.ok(response);
    }
    
    @Operation(summary = "获取上月预算结算信息")
    @GetMapping("/settlement")
    public ResponseEntity<BudgetSettlementResponse> getBudgetSettlement(Authentication authentication) {
        Long userId = getUserId(authentication);
        BudgetSettlementResponse response = budgetService.getLastMonthSettlement(userId);
        return ResponseEntity.ok(response);
    }
    
    @Operation(summary = "设置/更新预算")
    @PutMapping
    public ResponseEntity<BudgetResponse> setBudget(
            @RequestBody BudgetRequest request,
            Authentication authentication) {
        Long userId = getUserId(authentication);
        BudgetResponse response = budgetService.setBudget(userId, request);
        return ResponseEntity.ok(response);
    }
    
    private Long getUserId(Authentication authentication) {
        UserDetails userDetails = (UserDetails) authentication.getPrincipal();
        String username = userDetails.getUsername();
        User user = userMapper.selectOne(
            new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<User>()
                .eq(User::getUsername, username)
        );
        return user != null ? user.getId() : null;
    }
}