package com.ruoyi.system.controller;

import java.util.List;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.ruoyi.common.annotation.Log;
import com.ruoyi.common.core.controller.BaseController;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.enums.BusinessType;
import com.ruoyi.system.domain.ServiceCate;
import com.ruoyi.system.service.IServiceCateService;
import com.ruoyi.common.utils.poi.ExcelUtil;
import com.ruoyi.common.core.page.TableDataInfo;

/**
 * 服务分类Controller（二级分类管理）
 * 
 * @author ruoyi
 * @date 2025-05-13
 */
@RestController
@RequestMapping("/system/ServiceCate")
public class ServiceCateController extends BaseController
{
    @Autowired
    private IServiceCateService serviceCateService;

    /**
     * 查询服务分类列表
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:list')")
    @GetMapping("/list")
    public TableDataInfo list(ServiceCate serviceCate, HttpServletRequest request)
    {
        // 如果pageSize大于1000，说明是要获取所有数据，不分页
        String pageSizeStr = request.getParameter("pageSize");
        if (pageSizeStr != null && Integer.parseInt(pageSizeStr) > 1000) {
            // 不分页查询
            List<ServiceCate> list = serviceCateService.selectServiceCateList(serviceCate);
            TableDataInfo dataTable = new TableDataInfo();
            dataTable.setRows(list);
            dataTable.setTotal(list.size());
            return dataTable;
        } else {
            // 正常分页查询
            startPage();
            List<ServiceCate> list = serviceCateService.selectServiceCateList(serviceCate);
            return getDataTable(list);
        }
    }

    /**
     * 导出服务分类列表
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:export')")
    @Log(title = "服务分类", businessType = BusinessType.EXPORT)
    @PostMapping("/export")
    public void export(HttpServletResponse response, ServiceCate serviceCate)
    {
        List<ServiceCate> list = serviceCateService.selectServiceCateList(serviceCate);
        ExcelUtil<ServiceCate> util = new ExcelUtil<ServiceCate>(ServiceCate.class);
        util.exportExcel(response, list, "服务分类数据");
    }

    /**
     * 获取服务分类详细信息
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:query')")
    @GetMapping(value = "/{id}")
    public AjaxResult getInfo(@PathVariable("id") Long id)
    {
        return success(serviceCateService.selectServiceCateById(id));
    }

    /**
     * 新增服务分类
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:add')")
    @Log(title = "服务分类", businessType = BusinessType.INSERT)
    @PostMapping
    public AjaxResult add(@RequestBody ServiceCate serviceCate)
    {
        // 验证分类级别（只允许二级分类）
        if (serviceCate.getParentId() == null) {
            serviceCate.setParentId(0L); // 一级分类
        } else {
            // 检查父级分类是否为一级分类
            ServiceCate parent = serviceCateService.selectServiceCateById(serviceCate.getParentId());
            if (parent == null) {
                return error("父级分类不存在");
            }
            if (parent.getParentId() != 0L) {
                return error("只支持二级分类，不能在二级分类下创建子分类");
            }
        }
        
        // 设置默认值
        if (serviceCate.getSort() == null) {
            serviceCate.setSort(0L);
        }
        if (serviceCate.getBrowse() == null) {
            serviceCate.setBrowse(0L);
        }
        
        return toAjax(serviceCateService.insertServiceCate(serviceCate));
    }

    /**
     * 修改服务分类
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:edit')")
    @Log(title = "服务分类", businessType = BusinessType.UPDATE)
    @PutMapping
    public AjaxResult edit(@RequestBody ServiceCate serviceCate)
    {
        // 不能将自己设为父级
        if (serviceCate.getId() != null && serviceCate.getId().equals(serviceCate.getParentId())) {
            return error("不能将自己设为父级分类");
        }
        
        // 如果修改了父级分类，需要验证
        if (serviceCate.getParentId() != null && serviceCate.getParentId() != 0L) {
            ServiceCate parent = serviceCateService.selectServiceCateById(serviceCate.getParentId());
            if (parent == null) {
                return error("父级分类不存在");
            }
            if (parent.getParentId() != 0L) {
                return error("只支持二级分类，不能设置三级分类");
            }
        }
        
        return toAjax(serviceCateService.updateServiceCate(serviceCate));
    }

    /**
     * 分类状态修改
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:changeStatus')")
    @Log(title = "修改状态", businessType = BusinessType.UPDATE)
    @PutMapping("/changeStatus")
    public AjaxResult changeStatus(@RequestBody ServiceCate serviceCate)
    {
        ServiceCate newServiceCate = serviceCateService.selectServiceCateById(serviceCate.getId());
        newServiceCate.setStatus(serviceCate.getStatus());
        return toAjax(serviceCateService.updateServiceCate(newServiceCate));
    }

    /**
     * 删除服务分类
     */
    @PreAuthorize("@ss.hasPermi('system:ServiceCate:remove')")
    @Log(title = "服务分类", businessType = BusinessType.DELETE)
    @DeleteMapping("/{ids}")
    public AjaxResult remove(@PathVariable Long[] ids)
    {
        // 检查是否有子分类
        for (Long id : ids) {
            ServiceCate childQuery = new ServiceCate();
            childQuery.setParentId(id);
            List<ServiceCate> children = serviceCateService.selectServiceCateList(childQuery);
            if (children != null && children.size() > 0) {
                ServiceCate parent = serviceCateService.selectServiceCateById(id);
                return error("分类【" + parent.getTitle() + "】存在子分类，不能删除");
            }
        }
        return toAjax(serviceCateService.deleteServiceCateByIds(ids));
    }
}