package com.gxwebsoft.shop.controller;

import cn.hutool.core.util.ObjectUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.gxwebsoft.common.core.web.ApiResult;
import com.gxwebsoft.common.core.web.BaseController;
import com.gxwebsoft.common.core.web.BatchParam;
import com.gxwebsoft.common.core.web.PageResult;
import com.gxwebsoft.shop.entity.Cart;
import com.gxwebsoft.shop.entity.Merchant;
import com.gxwebsoft.shop.param.CartParam;
import com.gxwebsoft.shop.service.CartService;
import com.gxwebsoft.shop.service.MerchantService;
import com.gxwebsoft.shop.vo.CartVo;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.*;

/**
 * 购物车控制器
 *
 * @author 科技小王子
 * @since 2024-07-29 21:02:39
 */
@Api(tags = "购物车管理")
@RestController
@RequestMapping("/api/shop/cart")
public class CartController extends BaseController {
  @Resource
  private CartService cartService;
  @Resource
  private MerchantService merchantService;

  @ApiOperation("分页查询购物车")
  @GetMapping("/page")
  public ApiResult<PageResult<Cart>> page(CartParam param) {
    // 使用关联查询
    return success(cartService.pageRel(param));
  }

  @ApiOperation("查询全部购物车")
  @GetMapping()
  public ApiResult<CartVo> list(CartParam param) {
    if (ObjectUtil.isEmpty(getLoginUser())) {
      return success("请先登录",null);
    }
    // 附加用户ID
    param.setUserId(getLoginUserId());
    return success(cartService.listRel(param));
  }

  @PreAuthorize("hasAuthority('shop:cart:list')")
  @ApiOperation("根据id查询购物车")
  @GetMapping("/{id}")
  public ApiResult<Cart> get(@PathVariable("id") Integer id) {
    // 使用关联查询
    return success(cartService.getByIdRel(id));
  }

  @ApiOperation("添加购物车")
  @PostMapping()
  public ApiResult<?> save(@RequestBody Cart cart) {
    if (ObjectUtil.isEmpty(getLoginUser())) {
      return success("请先登录",null);
    }
    // 修正用户ID
    cart.setUserId(getLoginUserId());
    // 修正购买数量
    if (ObjectUtil.isEmpty(cart.getCartNum())) {
      cart.setCartNum(1);
    }
    // 超出最大限制
    if (cartService.count(new LambdaUpdateWrapper<Cart>().eq(Cart::getUserId,getLoginUserId())) > 50) {
      return fail("购物车宝贝数量已满，建议您先去结算或清理~");
    }
    // 重复商品叠加数量
    final Cart one = cartService.getOne(new LambdaQueryWrapper<Cart>()
      .eq(Cart::getUserId, getLoginUserId())
      .eq(Cart::getGoodsId,cart.getGoodsId())
      .eq(Cart::getSpec,cart.getSpec())
      .last("limit 1"));
    if(ObjectUtil.isNotEmpty(one)){
      one.setCartNum(cart.getCartNum()+1);
      cartService.updateById(one);
      return success("更新成功",one.getId());
    }
    if (cartService.save(cart)) {
      return success("添加成功",cart.getId());
    }

    return fail("添加失败");
  }

  @ApiOperation("修改购物车")
  @PutMapping()
  public ApiResult<?> update(@RequestBody Cart cart) {
    if (cartService.updateById(cart)) {
      final CartParam param = new CartParam();
      param.setType(cart.getType());
      return success("修改成功");
    }
    return fail("修改失败");
  }

  @PreAuthorize("hasAuthority('shop:cart:remove')")
  @ApiOperation("删除购物车")
  @DeleteMapping("/{id}")
  public ApiResult<?> remove(@PathVariable("id") Integer id) {
    if (cartService.removeById(id)) {
      return success("删除成功");
    }
    return fail("删除失败");
  }

  @PreAuthorize("hasAuthority('shop:cart:save')")
  @ApiOperation("批量添加购物车")
  @PostMapping("/batch")
  public ApiResult<?> saveBatch(@RequestBody List<Cart> list) {
    if (cartService.saveBatch(list)) {
      return success("添加成功");
    }
    return fail("添加失败");
  }

  @PreAuthorize("hasAuthority('shop:cart:update')")
  @ApiOperation("批量修改购物车")
  @PutMapping("/batch")
  public ApiResult<?> removeBatch(@RequestBody BatchParam<Cart> batchParam) {
    if (batchParam.update(cartService, "id")) {
      return success("修改成功");
    }
    return fail("修改失败");
  }

  @PreAuthorize("hasAuthority('shop:cart:remove')")
  @ApiOperation("批量删除购物车")
  @DeleteMapping("/batch")
  public ApiResult<?> removeBatch(@RequestBody List<Integer> ids) {
    if (cartService.removeByIds(ids)) {
      return success("删除成功");
    }
    return fail("删除失败");
  }

  @ApiOperation("全选操作")
  @PutMapping("/onSelectAll/{yes}")
  public ApiResult<?> onSelectAll(@PathVariable("yes") Boolean yes) {
    if (ObjectUtil.isEmpty(getLoginUser())) {
      return success("请先登录",null);
    }
    final List<Cart> carts = cartService.list(new LambdaUpdateWrapper<Cart>()
      .eq(Cart::getSelected,!yes)
      .eq(Cart::getUserId, getLoginUserId()));
    carts.forEach(d -> {
      d.setSelected(yes);
    });
    return success("修改成功", cartService.updateBatchById(carts));
  }

  @ApiOperation("增加数量")
  @PutMapping("/addCartNum")
  public ApiResult<?> addCartNum(@RequestBody Cart cart) {
    if (ObjectUtil.isEmpty(getLoginUser())) {
      return success("请先登录",null);
    }
    cart.setCartNum(cart.getCartNum()+1);
    cartService.updateById(cart);
    return success("操作成功");
  }

  @ApiOperation("减少数量")
  @PutMapping("/subCartNum")
  public ApiResult<?> subCartNum(@RequestBody Cart cart) {
    if (ObjectUtil.isEmpty(getLoginUser())) {
      return success("请先登录",null);
    }
    cart.setCartNum(cart.getCartNum()-1);
    cartService.updateById(cart);
    return success("操作成功");
  }

}