package com.ruoyi.system.controller;

import java.util.List;
import java.util.HashMap;
import java.util.Map;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.multipart.MultipartFile;
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.CjCollege;
import com.ruoyi.system.mapper.CjCollegeMapper;
import com.ruoyi.system.mapper.CjMajorMapper;
import com.ruoyi.system.service.ICjCollegeService;
import com.ruoyi.common.utils.poi.ExcelUtil;
import com.ruoyi.common.core.page.TableDataInfo;

/**
 * 学院Controller
 *
 * @author ruoyi
 * @date 2026-09-03
 */
@RestController
@RequestMapping("/system/college")
public class CjCollegeController extends BaseController
{
    @Autowired
    private ICjCollegeService cjCollegeService;
    @Autowired
    private CjCollegeMapper cjCollegeMapper;
    @Autowired
    private CjMajorMapper cjMajorMapper;

    /**
     * 查询学院列表
     */
    @PreAuthorize("@ss.hasPermi('system:college:list')")
    @GetMapping("/list")
    public TableDataInfo list(CjCollege cjCollege)
    {
        startPage();
        List<CjCollege> list = cjCollegeService.selectCjCollegeList(cjCollege);
        return getDataTable(list);
    }

    /**
     * 导出学院列表
     */
    @PreAuthorize("@ss.hasPermi('system:college:export')")
    @Log(title = "学院", businessType = BusinessType.EXPORT)
    @PostMapping("/export")
    public void export(HttpServletResponse response, CjCollege cjCollege)
    {
        List<CjCollege> list = cjCollegeService.selectCjCollegeList(cjCollege);
        ExcelUtil<CjCollege> util = new ExcelUtil<CjCollege>(CjCollege.class);
        util.exportExcel(response, list, "学院数据");
    }

    /**
     * 获取学院详细信息
     */
    @PreAuthorize("@ss.hasPermi('system:college:query')")
    @GetMapping(value = "/{collegeId}")
    public AjaxResult getInfo(@PathVariable("collegeId") Long collegeId)
    {
        return success(cjCollegeService.selectCjCollegeByCollegeId(collegeId));
    }

    /**
     * 新增学院
     */
    @PreAuthorize("@ss.hasPermi('system:college:add')")
    @Log(title = "学院", businessType = BusinessType.INSERT)
    @PostMapping
    public AjaxResult add(@RequestBody CjCollege cjCollege)
    {
        return toAjax(cjCollegeService.insertCjCollege(cjCollege));
    }

    /**
     * 修改学院
     */
    @PreAuthorize("@ss.hasPermi('system:college:edit')")
    @Log(title = "学院", businessType = BusinessType.UPDATE)
    @PutMapping
    public AjaxResult edit(@RequestBody CjCollege cjCollege)
    {
        return toAjax(cjCollegeService.updateCjCollege(cjCollege));
    }

    /**
     * 删除学院（引用保护：其下存在专业时禁止删除）
     */
    @PreAuthorize("@ss.hasPermi('system:college:remove')")
    @Log(title = "学院", businessType = BusinessType.DELETE)
	@DeleteMapping("/{collegeIds}")
    public AjaxResult remove(@PathVariable Long[] collegeIds)
    {
        if (collegeIds != null && collegeIds.length > 0
            && cjMajorMapper.countByCollegeIds(collegeIds) > 0)
        {
            return error("该学院下存在专业，无法删除；请先删除其下专业，或改用“停用”");
        }
        return toAjax(cjCollegeService.deleteCjCollegeByCollegeIds(collegeIds));
    }

    /**
     * 学院停用/启用（0正常 1停用）
     */
    @PreAuthorize("@ss.hasPermi('system:college:status')")
    @Log(title = "学院", businessType = BusinessType.UPDATE)
    @PutMapping("/changeStatus")
    public AjaxResult changeStatus(@RequestBody CjCollege cjCollege)
    {
        CjCollege update = new CjCollege();
        update.setCollegeId(cjCollege.getCollegeId());
        update.setStatus(cjCollege.getStatus());
        update.setUpdateBy(getUsername());
        return toAjax(cjCollegeService.updateCjCollege(update));
    }

    /**
     * 导入学院（冲突处理：匹配学院名称，覆盖或跳过）
     */
    @PreAuthorize("@ss.hasPermi('system:college:import')")
    @Log(title = "学院", businessType = BusinessType.IMPORT)
    @PostMapping("/importData")
    public AjaxResult importData(MultipartFile file, boolean updateSupport) throws Exception
    {
        ExcelUtil<CjCollege> util = new ExcelUtil<CjCollege>(CjCollege.class);
        List<CjCollege> collegeList = util.importExcel(file.getInputStream());
        String message;
        int insertCount = 0, updateCount = 0, failCount = 0;
        StringBuilder failMsg = new StringBuilder();
        String operName = getUsername();

        for (int i = 0; i < collegeList.size(); i++)
        {
            CjCollege col = collegeList.get(i);
            int rowNo = i + 1;
            try
            {
                if (col.getCollegeName() == null || col.getCollegeName().trim().isEmpty())
                {
                    failCount++;
                    failMsg.append("第" + rowNo + "条: 学院名称不能为空; ");
                    continue;
                }
                col.setCollegeName(col.getCollegeName().trim());
                List<CjCollege> exists = cjCollegeMapper.selectByCollegeName(col.getCollegeName());
                if (exists.isEmpty())
                {
                    col.setCreateBy(operName);
                    cjCollegeService.insertCjCollege(col);
                    insertCount++;
                }
                else if (exists.size() > 1)
                {
                    failCount++;
                    failMsg.append("第" + rowNo + "条: 学院名称“" + col.getCollegeName() + "”在系统中重复，无法确定更新对象; ");
                }
                else if (updateSupport)
                {
                    CjCollege old = exists.get(0);
                    col.setCollegeId(old.getCollegeId());
                    col.setUpdateBy(operName);
                    cjCollegeService.updateCjCollege(col);
                    updateCount++;
                }
                else
                {
                    failCount++;
                    failMsg.append("第" + rowNo + "条: 学院“" + col.getCollegeName() + "”已存在; ");
                }
            }
            catch (Exception e)
            {
                failCount++;
                failMsg.append("第" + rowNo + "条: 导入失败(" + e.getMessage() + "); ");
            }
        }

        if (updateSupport)
            message = String.format("导入完成！新增 %d 条，更新 %d 条", insertCount, updateCount);
        else
            message = String.format("导入完成！新增 %d 条，由于数据重复导致导入失败 %d 条", insertCount, failCount);

        Map<String, Object> data = new HashMap<>();
        data.put("message", message);
        data.put("insertCount", insertCount);
        data.put("updateCount", updateCount);
        data.put("failCount", failCount);
        data.put("failMsg", failMsg.toString());
        return AjaxResult.success(data);
    }

    /**
     * 下载学院导入模板
     */
    @PreAuthorize("@ss.hasPermi('system:college:import')")
    @PostMapping("/importTemplate")
    public void importTemplate(HttpServletResponse response) throws Exception
    {
        ExcelUtil<CjCollege> util = new ExcelUtil<CjCollege>(CjCollege.class);
        util.importTemplateExcel(response, "学院导入模板");
    }
}