package com.rgzn.app.controller;

import com.rgzn.app.common.ApiResponse;
import com.rgzn.app.entity.Bill;
import com.rgzn.app.service.BillService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/bill")
public class BillController {

    @Autowired
    private BillService billService;

    @PostMapping
    public ApiResponse createBill(@RequestBody Bill bill) {
        Bill createdBill = billService.createBill(bill);
        return ApiResponse.success(createdBill);
    }

    @GetMapping("/{id}")
    public ApiResponse getBill(@PathVariable Long id) {
        Bill bill = billService.getBillById(id);
        return bill != null ? ApiResponse.success(bill) : ApiResponse.error("账单不存在");
    }

    // 此方法已不再使用，因为我们现在使用openid
    // @GetMapping("/user/{userId}")
    // public ApiResponse getUserBills(@PathVariable Long userId) {
    //     return ApiResponse.success(billService.getBillsByUserId(userId));
    // }

    @PutMapping("/{id}")
    public ApiResponse updateBill(@PathVariable Long id, @RequestBody Bill bill) {
        bill.setId(id);
        boolean success = billService.updateBill(bill);
        return success ? ApiResponse.success(null) : ApiResponse.error("更新失败");
    }

    @DeleteMapping("/{id}")
    public ApiResponse deleteBill(@PathVariable Long id) {
        boolean success = billService.deleteBill(id);
        return success ? ApiResponse.success(null) : ApiResponse.error("删除失败");
    }

    /**
     * 获取用户指定月份的账单统计数据
     * @param openid 用户的openid
     * @param year 年份
     * @param month 月份
     * @return 包含月度结余、月度收入和月度支出的统计数据
     */
    @GetMapping("/statistics/{openid}")
    public ApiResponse getMonthlyStatistics(
            @PathVariable String openid,
            @RequestParam int year,
            @RequestParam int month) {
        Map<String, Object> statistics = billService.getMonthlyStatisticsByOpenid(openid, year, month);
        return ApiResponse.success(statistics);
    }

    /**
     * 根据openid获取账单列表，可选按月份筛选，按修改时间倒序排序
     * @param openid 用户的openid
     * @param year 可选的年份参数
     * @param month 可选的月份参数
     * @return 符合条件的账单列表
     */
    @GetMapping("/list/{openid}")
    public ApiResponse getBillsByOpenid(
            @PathVariable String openid,
            @RequestParam(required = false) Integer year,
            @RequestParam(required = false) Integer month) {
        if (year != null && month != null) {
            return ApiResponse.success(billService.getBillsByOpenidAndMonth(openid, year, month));
        } else {
            return ApiResponse.success(billService.getBillsByOpenidOrderByUpdateTimeDesc(openid));
        }
    }

    /**
     * 获取用户指定年份的所有月份账单统计数据
     * @param openid 用户的openid
     * @param year 年份
     * @return 包含每个月的结余、收入和支出的统计数据列表
     */
    @GetMapping("/yearly-statistics/{openid}")
    public ApiResponse getYearlyStatistics(
            @PathVariable String openid,
            @RequestParam int year) {
        List<Map<String, Object>> yearlyStatistics = billService.getYearlyStatisticsByOpenid(openid, year);
        return ApiResponse.success(yearlyStatistics);
    }
}