package bus_service

import (
	"bytes"
	"encoding/csv"
	"errors"
	"fmt"
	"github.com/go-admin-team/go-admin-core/logger"
	"github.com/go-admin-team/go-admin-core/sdk/service"
	"github.com/xuri/excelize/v2"
	"go-admin/app/admin/models/bus_models"
	"go-admin/common/redisx"
	"golang.org/x/net/context"
	"gorm.io/gorm"
	"io"
	"math/rand"
	"os"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"
	"unicode/utf8"
)

const (
	maxPhonesPerShard = 10000
	cacheExpire       = time.Hour

	TimeFormat = "2006-01-02T15:04:05+08:00"

	ExportFile    = "/www/server/images/export/"
	MiGuExportUrl = "https://telecom.deovo.com/load/export/"
)

type SmsService struct {
	service.Service
}

// ReadExcelFile 读取 Excel 文件并提取第一列的手机号
func (s *SmsService) ReadExcelFile(file []byte) ([]string, error) {
	// 使用 excelize.OpenReader 直接从文件流读取内容
	f, err := excelize.OpenReader(bytes.NewReader(file))
	if err != nil {
		return nil, fmt.Errorf("无法打开 Excel 文件: %v", err)
	}

	var phones []string
	// 获取所有工作表列表
	sheetList := f.GetSheetList()

	if len(sheetList) == 0 {
		return nil, fmt.Errorf("excel 文件中没有工作表")
	}

	// 选择第一个工作表
	sheet := sheetList[0]
	rows, err := f.GetRows(sheet)
	if err != nil {
		return nil, fmt.Errorf("读取 Excel 行失败: %v", err)
	}

	// 假设第一列是手机号
	for _, row := range rows {
		if len(row) > 0 {
			phone := row[0]
			phones = append(phones, phone)
		}
	}

	return phones, nil
}

func (s *SmsService) CachePhonesByShard(importSerial string, phones []string) error {
	ctx := context.Background()

	total := 0
	for i := 0; i < len(phones); i += maxPhonesPerShard {
		end := i + maxPhonesPerShard
		if end > len(phones) {
			end = len(phones)
		}
		shard := phones[i:end]
		total++
		key := fmt.Sprintf("sms:import:%s:%d", importSerial, total)
		if err := redisx.Client.RPush(ctx, key, shard).Err(); err != nil {
			return err
		}
		redisx.Client.Expire(ctx, key, cacheExpire)
	}

	// 保存总分片数量
	totalKey := fmt.Sprintf("sms:import:%s:total", importSerial)
	err := redisx.Client.Set(ctx, totalKey, total, cacheExpire).Err()
	return err
}

func (s *SmsService) AppendPhonesToRedis(serial string, phones []string) error {
	ctx := context.Background()

	// 拿当前最大分片号
	totalKey := fmt.Sprintf("sms:import:%s:total", serial)
	totalStr, err := redisx.Client.Get(ctx, totalKey).Result()
	if err != nil {
		return fmt.Errorf("无法读取缓存分片: %v", err)
	}

	total, _ := strconv.Atoi(totalStr)
	if total == 0 {
		return fmt.Errorf("缓存分片不存在")
	}

	// 直接往最后一片中添加（你也可以按量分片再扩展）
	lastKey := fmt.Sprintf("sms:import:%s:%d", serial, total)
	values := make([]interface{}, len(phones))
	for i, p := range phones {
		values[i] = p
	}

	err = redisx.Client.RPush(ctx, lastKey, values...).Err()
	return err
}

func (s *SmsService) SubmitSmsTaskFromRedis(ctx context.Context,
	serial, content, sendTime, coopNum, coopName string) error {
	// 读取分片数量
	totalKey := fmt.Sprintf("sms:import:%s:total", serial)
	totalStr, err := redisx.Client.Get(ctx, totalKey).Result()
	if err != nil {
		return fmt.Errorf("获取缓存分片数失败: %v", err)
	}
	total, _ := strconv.Atoi(totalStr)
	if total == 0 {
		return fmt.Errorf("分片数为 0，无法创建任务")
	}

	// 统计总手机号数量
	var totalPhones int
	phoneCounts := make([]int, total)
	for i := 1; i <= total; i++ {
		redisKey := fmt.Sprintf("sms:import:%s:%d", serial, i)
		count, err := redisx.Client.LLen(ctx, redisKey).Result()
		if err != nil {
			return fmt.Errorf("读取缓存分片 %d 失败: %v", i, err)
		}
		totalPhones += int(count)
		phoneCounts[i-1] = int(count)
	}

	if totalPhones == 0 {
		return fmt.Errorf("手机号为空，不能创建任务")
	}

	var planTime time.Time
	// 判断是否设置了定时发送
	if sendTime != "" {
		loc, _ := time.LoadLocation("Asia/Shanghai")
		planTime, err = time.ParseInLocation(TimeFormat, sendTime, loc)
		if err != nil {
			return fmt.Errorf("解析时间出错:%s", err.Error())
		}
	}

	// 计算短信条数（按70字分割）
	// 短信条数计算：70字以内算1条，超过则每67字拆1条（长短信按67字分段）
	contentCost := (len([]rune(content)) + 66) / 67
	totalSmsCount := totalPhones * contentCost

	// 使用数据库事务
	return s.Orm.WithContext(ctx).Transaction(func(tx *gorm.DB) error {

		// 生成批次ID
		batchID, _ := GenerateBatchID(s.Orm)

		// 插入任务
		task := &bus_models.SmsTask{
			CooperativeNumber:  coopNum, // 可根据需要填充
			CooperativeName:    coopName,
			BatchID:            batchID,
			ImportID:           serial,
			SmsContent:         content,
			SmsContentCost:     contentCost,
			TotalPhoneCount:    totalPhones,
			TotalSmsCount:      totalSmsCount,
			Status:             0,
			InterceptFailCount: 0,
			ChannelFailCount:   0,
			ScheduleTime:       &planTime,
		}
		if err := tx.Create(task).Error; err != nil {
			return fmt.Errorf("创建短信任务失败: %v", err)
		}

		// 插入批次记录
		for i := 1; i <= total; i++ {
			batch := &bus_models.SmsTaskBatch{
				CooperativeNumber: coopNum, // 可根据需要填充
				CooperativeName:   coopName,
				TaskID:            task.ID,
				BatchID:           batchID,
				ImportID:          serial,
				Num:               i,
				PhoneCount:        phoneCounts[i-1],
				SmsCount:          phoneCounts[i-1] * contentCost,
				SmsContent:        content,
				Status:            0,
				ScheduleTime:      &planTime,
			}
			if err := tx.Create(batch).Error; err != nil {
				return fmt.Errorf("创建批次失败: %v", err)
			}
		}

		// ✅ 提示：不在这里生成 SmsSendRecord，后续通过消费者从 Redis 中读取批次生成
		// 否则数据量大时会影响事务和响应速度

		return nil
	})
}

// GenerateBatchID 生成唯一的批次ID：日期（YYYYMMDD）+ 8位随机数（共16位）
func GenerateBatchID(db *gorm.DB) (string, error) {
	// 获取当前日期（年月日）
	dateStr := time.Now().Format("20060102") // 例如：20250411

	// 生成一个8位随机数（范围：00000000 ~ 99999999）
	rand.Seed(time.Now().UnixNano())
	randomNum := rand.Int63n(100000000) // 8位最大是1亿，即10^8

	// 格式化为8位字符串（左侧补0）
	randomNumStr := fmt.Sprintf("%08d", randomNum)

	// 拼接成 batch_id
	batchID := fmt.Sprintf("%s%s", dateStr, randomNumStr)

	// 检查 sms_task 表中是否已存在该 batch_id
	var count int64
	err := db.Table("sms_task").Where("batch_id = ?", batchID).Count(&count).Error
	if err != nil {
		return "", err
	}

	// 如果已存在，则递归重试
	if count > 0 {
		return GenerateBatchID(db)
	}

	return batchID, nil
}

func (s *SmsService) ExportPhoneListToExcel(importSerial string, directPhones []string) (string, error) {
	ctx := context.Background()
	var allPhones []string

	// 从 Redis 获取导入的号码
	if importSerial != "" {
		totalKey := fmt.Sprintf("sms:import:%s:total", importSerial)
		totalStr, err := redisx.Client.Get(ctx, totalKey).Result()
		if err == nil {
			total, _ := strconv.Atoi(totalStr)
			for i := 1; i <= total; i++ {
				key := fmt.Sprintf("sms:import:%s:%d", importSerial, i)
				shardPhones, err := redisx.Client.LRange(ctx, key, 0, -1).Result()
				if err == nil {
					allPhones = append(allPhones, shardPhones...)
				}
			}
		}
	}

	// 追加直接输入的号码
	if len(directPhones) > 0 {
		allPhones = append(allPhones, directPhones...)
	}

	if len(allPhones) == 0 {
		return "", fmt.Errorf("没有可导出的号码")
	}

	// 创建 Excel 文件
	file := excelize.NewFile()
	sheet := "Sheet1"

	for i, phone := range allPhones {
		cell := fmt.Sprintf("A%d", i+1)
		file.SetCellValue(sheet, cell, phone)
	}

	// 设置样式
	style, _ := file.NewStyle(&excelize.Style{
		Alignment: &excelize.Alignment{
			Horizontal: "center",
			Vertical:   "center",
		},
	})

	_ = file.SetCellStyle(sheet, "A1", fmt.Sprintf("A%d", len(allPhones)), style)
	file.SetColWidth(sheet, "A", "A", 20)

	// 保存文件
	fileName := time.Now().Format("20060102150405") + "_号码导出.xlsx"
	url := MiGuExportUrl + fileName

	if err := file.SaveAs(ExportFile + fileName); err != nil {
		logger.Errorf("导出Excel失败: %v", err)
		return "", err
	}

	return url, nil
}

// CheckSensitiveWords 检查短信内容是否包含敏感词
func (s *SmsService) CheckSensitiveWords(content string) ([]string, error) {
	var sensitiveWords []bus_models.SensitiveWord

	err := s.Orm.Table("sensitive_words").Where("is_enabled = ?", 1).
		Find(&sensitiveWords).Error
	if err != nil {
		return nil, err
	}

	var hits []string
	for _, sw := range sensitiveWords {
		if strings.Contains(content, sw.Word) {
			hits = append(hits, sw.Word)
		}
	}
	return hits, nil
}

// QuerySmsTaskList 查询短信下行记录
func (s *SmsService) QuerySmsTaskList(req bus_models.SmsTaskQueryRequest, db *gorm.DB) (*bus_models.SmsTaskQueryResponse, error) {
	var tasks []bus_models.SmsTask
	var total int64

	query := db.Model(&bus_models.SmsTask{}).Where("status = 2")

	if req.BatchID != "" {
		query = query.Where("batch_id = ?", req.BatchID)
	}
	if req.MinTotalSms > 0 {
		query = query.Where("total_sms_count >= ?", req.MinTotalSms)
	}
	if req.MinPhoneCount > 0 {
		query = query.Where("total_phone_count >= ?", req.MinPhoneCount)
	}
	if req.Status != nil {
		query = query.Where("status = ?", *req.Status)
	}
	if req.StartTime != "" && req.EndTime != "" {
		query = query.Where("created_at BETWEEN ? AND ?", req.StartTime, req.EndTime)
	}

	// 统计总数
	if err := query.Count(&total).Error; err != nil {
		return nil, err
	}

	// 分页处理
	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	// 查询分页数据
	if err := query.
		Order("created_at DESC").
		Limit(pageSize).
		Offset(offset).
		Find(&tasks).Error; err != nil {
		return nil, err
	}

	totalPage := int((total + int64(pageSize) - 1) / int64(pageSize))
	if totalPage < 1 {
		totalPage = 1
	}

	return &bus_models.SmsTaskQueryResponse{
		List:      tasks,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}, nil
}

func (s *SmsService) QuerySmsSendRecords(req bus_models.SmsSendRecordQueryReq) (bus_models.SmsSendRecordQueryResp, error) {
	var resp bus_models.SmsSendRecordQueryResp
	db := s.Orm.Model(&bus_models.SmsSendRecord{})

	if req.BatchID != "" {
		db = db.Where("batch_id = ?", req.BatchID)
	}
	if req.Phone != "" {
		db = db.Where("phone = ?", req.Phone)
	}
	if req.SmsCode != "" {
		db = db.Where("sms_code = ?", req.SmsCode)
	}
	if req.StartTime != "" {
		db = db.Where("receive_time >= ?", req.StartTime)
	}
	if req.EndTime != "" {
		db = db.Where("receive_time <= ?", req.EndTime)
	}
	if req.MinSegments > 0 {
		// 计算短信计费条数的粗略估算：每67字1条，注意实际可以存字段
		db = db.Where("(length(sms_content) / 67) + 1 >= ?", req.MinSegments)
	}

	err := db.Count(&resp.Total).Error
	if err != nil {
		return resp, err
	}

	// 分页处理
	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	// 查询分页数据
	if err = db.
		Order("created_at DESC").
		Limit(pageSize).
		Offset(offset).
		Find(&resp.List).Error; err != nil {
		return resp, err
	}

	totalPage := int((resp.Total + int64(pageSize) - 1) / int64(pageSize))
	if totalPage < 1 {
		totalPage = 1
	}

	resp.Page = page
	resp.PageSize = pageSize
	resp.TotalPage = totalPage

	return resp, nil
}

// GetPhonesFromCache 获取导入手机号前 limit 条
func (s *SmsService) GetPhonesFromCache(importSerial string, limit int) ([]string, error) {
	ctx := context.Background()
	totalKey := fmt.Sprintf("sms:import:%s:total", importSerial)
	totalStr, err := redisx.Client.Get(ctx, totalKey).Result()
	if err != nil {
		return nil, err
	}

	totalShards, err := strconv.Atoi(totalStr)
	if err != nil {
		return nil, err
	}

	result := make([]string, 0, limit)
	for i := 1; i <= totalShards; i++ {
		key := fmt.Sprintf("sms:import:%s:%d", importSerial, i)
		phones, err := redisx.Client.LRange(ctx, key, 0, -1).Result()
		if err != nil {
			return nil, err
		}
		result = append(result, phones...)
		if len(result) >= limit {
			return result[:limit], nil
		}
	}
	return result, nil
}

// GetSentPhonesByBatchID 从数据库查询已发送的手机号，最多返回 limit 条
func (s *SmsService) GetSentPhonesByBatchID(db *gorm.DB, batchID string, limit int) ([]string, error) {
	var records []bus_models.SmsSendRecord
	err := db.
		Where("batch_id = ?", batchID).
		Order("id DESC").
		Limit(limit).
		Find(&records).Error
	if err != nil {
		return nil, err
	}

	var phones []string
	for _, record := range records {
		phones = append(phones, record.Phone)
	}
	return phones, nil
}

// QueryScheduledSmsTaskList 查询定时短信任务
func (s *SmsService) QueryScheduledSmsTaskList(req bus_models.SmsTaskScheduledQueryRequest, db *gorm.DB) (*bus_models.SmsTaskQueryResponse, error) {
	var tasks []bus_models.SmsTask
	var total int64

	query := db.Model(&bus_models.SmsTask{}).
		Where("schedule_time IS NOT NULL").
		Where("status = ?", 0)

	if req.StartTime != "" && req.EndTime != "" {
		query = query.Where("schedule_time BETWEEN ? AND ?", req.StartTime, req.EndTime)
	}

	// 统计总数
	if err := query.Count(&total).Error; err != nil {
		return nil, err
	}

	// 分页处理
	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	if err := query.
		Order("schedule_time ASC").
		Limit(pageSize).
		Offset(offset).
		Find(&tasks).Error; err != nil {
		return nil, err
	}

	totalPage := int((total + int64(pageSize) - 1) / int64(pageSize))
	if totalPage < 1 {
		totalPage = 1
	}

	return &bus_models.SmsTaskQueryResponse{
		List:      tasks,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}, nil
}

func (s *SmsService) QuerySmsUplinkList(req bus_models.SmsUplinkQueryRequest, db *gorm.DB) (bus_models.SmsUplinkQueryResponse, error) {
	var resp bus_models.SmsUplinkQueryResponse
	var total int64

	query := db.Table("sms_uplink_log AS uplink").
		Select(`
			uplink.id AS uplink_id,
			uplink.phone_number,
			sr.id AS send_id,
			sr.sms_content,
			uplink.reply_content,
			uplink.created_at AS receive_time,
			sr.created_at AS send_time
		`).
		Joins("LEFT JOIN sms_send_record sr ON uplink.batch_id = sr.batch_id AND uplink.phone_number = sr.phone")

	// 条件拼接
	if req.PhoneNumber != "" {
		query = query.Where("uplink.phone_number LIKE ?", "%"+req.PhoneNumber+"%")
	}
	if req.SendID > 0 {
		query = query.Where("sr.id = ?", req.SendID)
	}
	if req.UplinkID > 0 {
		query = query.Where("uplink.id = ?", req.UplinkID)
	}
	if req.ReplyContent != "" {
		query = query.Where("uplink.reply_content LIKE ?", "%"+req.ReplyContent+"%")
	}
	if req.StartTime != "" && req.EndTime != "" {
		query = query.Where("uplink.created_at BETWEEN ? AND ?", req.StartTime, req.EndTime)
	}

	// 统计总数
	if err := query.Count(&total).Error; err != nil {
		return resp, err
	}

	// 分页处理
	page := req.Page
	if page <= 0 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	var results []bus_models.SmsUplinkRecordResponse
	// 查询数据
	err := query.Order("uplink.created_at DESC").Limit(pageSize).Offset(offset).Scan(&results).Error
	if err != nil {
		return resp, err
	}

	resp.List = results
	resp.Total = total
	resp.Page = page
	resp.PageSize = pageSize
	resp.TotalPage = (total + int64(page) - 1) / int64(pageSize)
	if resp.TotalPage < 1 {
		resp.TotalPage = 1
	}

	return resp, nil
}

// BatchUpdateSmsContent 修改短信内容
func (s *SmsService) BatchUpdateSmsContent(req bus_models.BatchUpdateSmsContentRequest, db *gorm.DB) error {
	// 计算短信内容消耗（每70字符1条，超出部分算1条）
	runeCount := utf8.RuneCountInString(req.SmsContent)
	smsCost := runeCount / 70
	if runeCount%70 != 0 {
		smsCost++
	}

	// 批量更新 SmsTask
	if err := db.Model(&bus_models.SmsTask{}).
		Where("id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"sms_content":      req.SmsContent,
			"sms_content_cost": smsCost,
		}).Error; err != nil {
		return err
	}

	// 同步更新 SmsTaskBatch 中相应内容
	if err := db.Model(&bus_models.SmsTaskBatch{}).
		Where("task_id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"sms_content": req.SmsContent,
		}).Error; err != nil {
		return err
	}

	return nil
}

func (s *SmsService) BatchCancelSmsTasks(req bus_models.BatchUpdateRequest, db *gorm.DB) error {
	if len(req.TaskIDs) == 0 {
		return errors.New("任务ID列表不能为空")
	}

	// 取消任务状态为 4（取消）
	if err := db.Model(&bus_models.SmsTask{}).
		Where("id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"status": 4,
		}).Error; err != nil {
		return err
	}

	// 同步取消子任务
	if err := db.Model(&bus_models.SmsTaskBatch{}).
		Where("task_id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"status": 4,
		}).Error; err != nil {
		return err
	}

	return nil
}

// BatchResetScheduleTime 批量重置定时时间
func (s *SmsService) BatchResetScheduleTime(req bus_models.BatchResetScheduleTimeRequest, db *gorm.DB) error {
	if len(req.TaskIDs) == 0 || req.ScheduleTime == "" {
		return errors.New("任务ID和定时时间不能为空")
	}

	var planTime time.Time
	var err error
	// 判断是否设置了定时发送
	if req.ScheduleTime != "" {
		loc, _ := time.LoadLocation("Asia/Shanghai")
		planTime, err = time.ParseInLocation(TimeFormat, req.ScheduleTime, loc)
		if err != nil {
			return fmt.Errorf("解析时间出错:%s", err.Error())
		}
	}

	// 更新 SmsTask
	if err := db.Model(&bus_models.SmsTask{}).
		Where("id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"schedule_time": planTime,
		}).Error; err != nil {
		return err
	}

	// 同步更新 SmsTaskBatch
	if err := db.Model(&bus_models.SmsTaskBatch{}).
		Where("task_id IN ?", req.TaskIDs).
		Updates(map[string]interface{}{
			"schedule_time": planTime,
		}).Error; err != nil {
		return err
	}

	return nil
}

// CreateSignatureRealname 创建签名实名制记录
func (s *SmsService) CreateSignatureRealname(data *bus_models.SmsSignatureRealname, db *gorm.DB) error {
	return db.Create(data).Error
}

// UpdateSignatureRealname 编辑签名实名制记录
func (s *SmsService) UpdateSignatureRealname(data *bus_models.SmsSignatureRealname, db *gorm.DB) error {
	if data.ID == 0 {
		return errors.New("ID不能为空")
	}
	return db.Model(&bus_models.SmsSignatureRealname{}).
		Where("id = ?", data.ID).
		Updates(data).Error
}

// BatchDeleteSignatureRealname 删除签名实名制记录
func (s *SmsService) BatchDeleteSignatureRealname(ids []uint, db *gorm.DB) error {
	if len(ids) == 0 {
		return errors.New("删除ID列表不能为空")
	}

	return db.Where("id IN ?", ids).Delete(&bus_models.SmsSignatureRealname{}).Error
}

func (s *SmsService) ListSignatureRealname(req bus_models.SignatureRealnameQuery, db *gorm.DB) (bus_models.SignatureRealnameQueryResp, error) {
	var resp bus_models.SignatureRealnameQueryResp
	var list []bus_models.SmsSignatureRealname
	var total int64

	query := db.Model(&bus_models.SmsSignatureRealname{})

	if req.Signature != "" {
		query = query.Where("signature LIKE ?", "%"+req.Signature+"%")
	}
	if req.CooperativeName != "" {
		query = query.Where("cooperative_name LIKE ?", "%"+req.CooperativeName+"%")
	}
	if req.CompanyName != "" {
		query = query.Where("company_name LIKE ?", "%"+req.CompanyName+"%")
	}
	if req.CompanyCreditCode != "" {
		query = query.Where("company_credit_code LIKE ?", "%"+req.CompanyCreditCode+"%")
	}
	if req.ResponsibleName != "" {
		query = query.Where("responsible_name LIKE ?", "%"+req.ResponsibleName+"%")
	}
	if req.UsageCategory != 0 {
		query = query.Where("usage_category = ?", req.UsageCategory)
	}
	if req.IsActive != 0 {
		query = query.Where("is_active = ?", req.IsActive)
	}

	// 获取总条数
	err := query.Count(&total).Error
	if err != nil {
		return resp, err
	}

	// 分页处理
	page := req.Page
	if page <= 0 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	// 分页查询
	err = query.Order("id desc").
		Offset(offset).
		Limit(pageSize).
		Find(&list).Error
	if err != nil {
		return resp, err
	}

	// 构建分页响应
	totalPage := (total + int64(pageSize) - 1) / int64(pageSize)
	if totalPage < 1 {
		totalPage = 1
	}

	resp = bus_models.SignatureRealnameQueryResp{
		List:      list,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}

	return resp, nil
}

func (s *SmsService) ListContacts(req bus_models.ContactQuery, db *gorm.DB) (bus_models.ContactQueryResp, error) {
	var resp bus_models.ContactQueryResp
	var list []bus_models.SmsContact
	var total int64

	query := db.Model(&bus_models.SmsContact{})

	if len(req.CategoryID) != 0 {
		query = query.Where("category_id IN ?", req.CategoryID)
	}
	if req.Name != "" {
		query = query.Where("name LIKE ?", "%"+req.Name+"%")
	}
	if req.PhoneNumber != "" {
		query = query.Where("phone_number LIKE ?", "%"+req.PhoneNumber+"%")
	}

	err := query.Count(&total).Error
	if err != nil {
		return resp, err
	}

	page := req.Page
	if page <= 0 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}
	offset := (page - 1) * pageSize

	err = query.Order("id desc").
		Offset(offset).
		Limit(pageSize).
		Find(&list).Error
	if err != nil {
		return resp, err
	}

	totalPage := (total + int64(pageSize) - 1) / int64(pageSize)
	if totalPage < 1 {
		totalPage = 1
	}

	resp = bus_models.ContactQueryResp{
		List:      list,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}
	return resp, nil
}

// AddContact 添加联系人
func (s *SmsService) AddContact(contact bus_models.SmsContact, db *gorm.DB) error {
	return db.Create(&contact).Error
}

// EditContact 编辑联系人
func (s *SmsService) EditContact(id uint64, contact bus_models.SmsContact, db *gorm.DB) error {
	var existingContact bus_models.SmsContact
	if err := db.Where("id = ?", id).First(&existingContact).Error; err != nil {
		return err
	}

	// 更新联系人字段
	existingContact.Name = contact.Name
	existingContact.PhoneNumber = contact.PhoneNumber
	existingContact.Gender = contact.Gender
	existingContact.Birthday = contact.Birthday
	existingContact.Company = contact.Company
	existingContact.Address = contact.Address
	existingContact.Remark = contact.Remark
	existingContact.CooperativeName = contact.CooperativeName
	existingContact.CooperativeNumber = contact.CooperativeNumber

	return db.Save(&existingContact).Error
}

// BulkDeleteContacts 批量删除联系人
func (s *SmsService) BulkDeleteContacts(req bus_models.ContactDeleteRequest, db *gorm.DB) error {
	return db.Where("id IN (?)", req.ContactIDs).Delete(&bus_models.SmsContact{}).Error
}

// ImportContactsFromExcel 从Excel导入联系人（含格式校验）
func (s *SmsService) ImportContactsFromExcel(r io.Reader, db *gorm.DB, coopNum, coopName string, categoryId uint64) error {
	excelFile, err := excelize.OpenReader(r)
	if err != nil {
		return errors.New("解析Excel失败")
	}

	rows, err := excelFile.GetRows("Sheet1")
	if err != nil || len(rows) < 2 {
		return errors.New("excel格式错误或无有效数据")
	}

	var contacts []bus_models.SmsContact
	for i, row := range rows {
		if i == 0 {
			continue
		}

		if len(row) < 7 {
			// 如果一行少于7个字段，补充缺失字段为空字符串或默认值
			for len(row) < 7 {
				row = append(row, "")
			}
		}

		phone := strings.TrimSpace(row[3])
		if !isValidPhoneNumber(phone) {
			return fmt.Errorf("第 %d 行手机号码格式不正确: %s", i+1, phone)
		}

		birthday, err := parseExcelDate(row[4])
		if err != nil {
			return fmt.Errorf("第 %d 行生日格式不正确，应为YYYY-MM-DD: %s", i+1, row[4])
		}

		contacts = append(contacts, bus_models.SmsContact{
			CategoryID:        categoryId,
			CooperativeNumber: coopNum,
			CooperativeName:   coopName,
			Name:              strings.TrimSpace(row[0]),
			Company:           strings.TrimSpace(row[1]),
			Gender:            strings.TrimSpace(row[2]),
			PhoneNumber:       phone,
			Birthday:          birthday,
			Address:           strings.TrimSpace(row[5]),
			Remark:            strings.TrimSpace(row[6]),
		})
	}

	if len(contacts) == 0 {
		return errors.New("无有效联系人记录")
	}

	err = db.Create(&contacts).Error
	if err != nil {
		return errors.New("导入失败：" + err.Error())
	}

	return nil
}

func isValidPhoneNumber(phone string) bool {
	match, _ := regexp.MatchString(`^1\d{10}$`, phone)
	return match
}

func parseExcelDate(dateStr string) (*time.Time, error) {
	if dateStr == "" {
		return nil, nil
	}
	layouts := []string{"2006-01-02", "2006/01/02"}
	for _, layout := range layouts {
		if t, err := time.Parse(layout, dateStr); err == nil {
			return &t, nil
		}
	}
	return nil, fmt.Errorf("日期格式不正确")
}

func (s *SmsService) ExportContactsToExcel(db *gorm.DB, req bus_models.ExportContactsRequest) (string, error) {
	var contacts []bus_models.SmsContact
	query := db.Order("id desc")

	if !req.All {
		if len(req.IDs) == 0 {
			return "", fmt.Errorf("未传入ID且未选择导出全部")
		}
		query = query.Where("id IN ?", req.IDs)
	}

	if err := query.Find(&contacts).Error; err != nil {
		return "", err
	}

	if len(contacts) == 0 {
		return "", fmt.Errorf("没有可导出的联系人")
	}

	file := excelize.NewFile()
	sheet := "Sheet1"
	headers := []string{"姓名", "公司", "性别", "手机号码", "生日", "地址", "备注"}

	// 表头
	for i, h := range headers {
		col := string('A' + i)
		file.SetCellValue(sheet, col+"1", h)
	}

	// 内容
	for i, c := range contacts {
		row := i + 2
		file.SetCellValue(sheet, "A"+strconv.Itoa(row), c.Name)
		file.SetCellValue(sheet, "B"+strconv.Itoa(row), c.Company)
		file.SetCellValue(sheet, "C"+strconv.Itoa(row), c.Gender)
		file.SetCellValue(sheet, "D"+strconv.Itoa(row), c.PhoneNumber)
		if c.Birthday != nil {
			file.SetCellValue(sheet, "E"+strconv.Itoa(row), c.Birthday.Format("2006-01-02"))
		}
		file.SetCellValue(sheet, "F"+strconv.Itoa(row), c.Address)
		file.SetCellValue(sheet, "G"+strconv.Itoa(row), c.Remark)
	}

	style, _ := file.NewStyle(&excelize.Style{
		Alignment: &excelize.Alignment{
			Horizontal: "center",
			Vertical:   "center",
		},
	})
	file.SetColWidth(sheet, "A", "G", 20)
	file.SetCellStyle(sheet, "A1", fmt.Sprintf("G%d", len(contacts)+1), style)

	// 保存文件
	fileName := time.Now().Format("20060102150405") + "_导出通讯录.xlsx"
	filePath := ExportFile + fileName
	fileUrl := MiGuExportUrl + fileName

	if err := file.SaveAs(filePath); err != nil {
		logger.Errorf("导出通讯录失败: %v", err)
		return "", err
	}

	return fileUrl, nil
}

func (s *SmsService) AddPhraseCategory(req bus_models.AddPhraseCategoryReq, db *gorm.DB) error {
	return db.Create(&bus_models.SmsPhraseCategory{
		Name:     req.Name,
		ParentID: uint64(req.ParentID),
	}).Error
}

func (s *SmsService) EditPhraseCategory(req bus_models.EditPhraseCategoryReq, db *gorm.DB) error {
	return db.Model(&bus_models.SmsPhraseCategory{}).
		Where("id = ?", req.ID).
		Update("name", req.Name).
		Error
}

func (s *SmsService) DeletePhraseCategories(ids []uint, db *gorm.DB) error {
	if len(ids) == 0 {
		return errors.New("未指定需要删除的分类")
	}

	var total int64
	if err := db.Model(&bus_models.SmsPhraseCategory{}).Count(&total).Error; err != nil {
		return err
	}

	// 递归找出所有要删除的 ID（含子分类）
	var allIDs []uint
	var walk func(uint)
	walk = func(parentID uint) {
		var children []bus_models.SmsPhraseCategory
		db.Where("parent_id = ?", parentID).Find(&children)
		for _, child := range children {
			allIDs = append(allIDs, uint(child.ID))
			walk(uint(child.ID))
		}
	}

	for _, id := range ids {
		allIDs = append(allIDs, id)
		walk(id)
	}

	// 保证删除后至少保留一个分类节点
	if len(allIDs) >= int(total) {
		return errors.New("无法删除所有分类节点，至少保留一个")
	}

	// 删除短语
	if err := db.Where("category_id IN ?", allIDs).Delete(&bus_models.SmsPhrase{}).Error; err != nil {
		return err
	}

	// 删除分类
	return db.Where("id IN ?", allIDs).Delete(&bus_models.SmsPhraseCategory{}).Error
}

func (s *SmsService) ListPhrases(req bus_models.SmsPhraseQuery, db *gorm.DB) (bus_models.SmsPhraseListResp, error) {
	var list []bus_models.SmsPhrase
	var total int64

	query := db.Model(&bus_models.SmsPhrase{})

	if req.Content != "" {
		query = query.Where("content LIKE ?", "%"+req.Content+"%")
	}
	if req.CategoryID != 0 {
		query = query.Where("category_id = ?", req.CategoryID)
	}

	err := query.Count(&total).Error
	if err != nil {
		return bus_models.SmsPhraseListResp{}, err
	}

	// 处理分页
	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}

	err = query.Order("id desc").
		Offset((page - 1) * pageSize).
		Limit(pageSize).
		Find(&list).Error
	if err != nil {
		return bus_models.SmsPhraseListResp{}, err
	}

	return bus_models.SmsPhraseListResp{
		List:      list,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: (total + int64(pageSize) - 1) / int64(pageSize),
	}, nil
}

// AddPhrase 新增
func (s *SmsService) AddPhrase(req bus_models.SmsPhraseAddOrEdit, db *gorm.DB) error {
	phrase := bus_models.SmsPhrase{
		Content:    req.Content,
		CategoryID: req.CategoryID,
	}
	return db.Create(&phrase).Error
}

// EditPhrase 编辑
func (s *SmsService) EditPhrase(req bus_models.SmsPhraseAddOrEdit, db *gorm.DB) error {
	return db.Model(&bus_models.SmsPhrase{}).
		Where("id = ?", req.ID).
		Updates(map[string]interface{}{
			"content":     req.Content,
			"category_id": req.CategoryID,
		}).Error
}

// DeletePhrases 批量删除
func (s *SmsService) DeletePhrases(ids []uint, db *gorm.DB) error {
	return db.Where("id IN (?)", ids).Delete(&bus_models.SmsPhrase{}).Error
}

func (s *SmsService) GetPhraseCategoryTree(db *gorm.DB, parentID uint64) ([]bus_models.SmsPhraseCategoryTree, error) {
	var categories []bus_models.SmsPhraseCategory
	if err := db.Find(&categories).Error; err != nil {
		return nil, err
	}

	// 构建 map[id]category
	idMap := make(map[uint64]*bus_models.SmsPhraseCategoryTree)
	for _, cat := range categories {
		node := &bus_models.SmsPhraseCategoryTree{
			ID:       cat.ID,
			Name:     cat.Name,
			ParentID: cat.ParentID,
		}
		idMap[cat.ID] = node
	}

	// 构建树结构
	for _, node := range idMap {
		if parent, ok := idMap[node.ParentID]; ok {
			parent.Children = append(parent.Children, *node)
		}
	}

	// 返回指定节点下的树
	if parentID != 0 {
		if root, ok := idMap[parentID]; ok {
			return []bus_models.SmsPhraseCategoryTree{*root}, nil
		}
		return []bus_models.SmsPhraseCategoryTree{}, nil // 指定节点不存在
	}

	// 否则返回整棵树
	var roots []bus_models.SmsPhraseCategoryTree
	for _, node := range idMap {
		if node.ParentID == 0 {
			roots = append(roots, *node)
		}
	}

	return roots, nil
}

func (s *SmsService) AddContactsCategory(req bus_models.AddContactCategoryReq, db *gorm.DB) error {
	return db.Create(&bus_models.SmsContactCategory{
		Name:     req.Name,
		ParentID: uint64(req.ParentID),
	}).Error
}

func (s *SmsService) EditContactsCategory(req bus_models.EditContactCategoryReq, db *gorm.DB) error {
	return db.Model(&bus_models.SmsContactCategory{}).
		Where("id = ?", req.ID).
		Update("name", req.Name).
		Error
}

func (s *SmsService) DeleteContactsCategories(ids []uint, db *gorm.DB) error {
	if len(ids) == 0 {
		return errors.New("未指定需要删除的分类")
	}

	var total int64
	if err := db.Model(&bus_models.SmsContactCategory{}).Count(&total).Error; err != nil {
		return err
	}

	// 递归找出所有要删除的 ID（含子分类）
	var allIDs []uint
	var walk func(uint)
	walk = func(parentID uint) {
		var children []bus_models.SmsContactCategory
		db.Where("parent_id = ?", parentID).Find(&children)
		for _, child := range children {
			allIDs = append(allIDs, uint(child.ID))
			walk(uint(child.ID))
		}
	}

	for _, id := range ids {
		allIDs = append(allIDs, id)
		walk(id)
	}

	// 保证删除后至少保留一个分类节点
	if len(allIDs) >= int(total) {
		return errors.New("无法删除所有分类节点，至少保留一个")
	}

	// 删除短语
	if err := db.Where("category_id IN ?", allIDs).Delete(&bus_models.SmsContact{}).Error; err != nil {
		return err
	}

	// 删除分类
	return db.Where("id IN ?", allIDs).Delete(&bus_models.SmsContactCategory{}).Error
}

func (s *SmsService) GetContactsCategoryTree(db *gorm.DB, parentID uint64) ([]bus_models.SmsContactCategoryTree, error) {
	var categories []bus_models.SmsContactCategory
	if err := db.Find(&categories).Error; err != nil {
		return nil, err
	}

	// 构建 map[id]category
	idMap := make(map[uint64]*bus_models.SmsContactCategoryTree)
	for _, cat := range categories {
		node := &bus_models.SmsContactCategoryTree{
			ID:       cat.ID,
			Name:     cat.Name,
			ParentID: cat.ParentID,
		}
		idMap[cat.ID] = node
	}

	// 构建树结构
	for _, node := range idMap {
		if parent, ok := idMap[node.ParentID]; ok {
			parent.Children = append(parent.Children, *node)
		}
	}

	// 返回指定节点下的树
	if parentID != 0 {
		if root, ok := idMap[parentID]; ok {
			return []bus_models.SmsContactCategoryTree{*root}, nil
		}
		return []bus_models.SmsContactCategoryTree{}, nil // 指定节点不存在
	}

	// 否则返回整棵树
	var roots []bus_models.SmsContactCategoryTree
	for _, node := range idMap {
		if node.ParentID == 0 {
			roots = append(roots, *node)
		}
	}

	return roots, nil
}

func (s *SmsService) ListCommonNumbers(req bus_models.SmsCommonNumberQuery, db *gorm.DB) (bus_models.SmsCommonNumberListResp, error) {
	var dbList []bus_models.SmsCommonNumber
	var total int64

	query := db.Model(&bus_models.SmsCommonNumber{})
	if req.Name != "" {
		query = query.Where("name LIKE ?", "%"+req.Name+"%")
	}
	err := query.Count(&total).Error
	if err != nil {
		return bus_models.SmsCommonNumberListResp{}, err
	}

	// 处理分页
	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}

	err = query.Order("id desc").
		Offset((page - 1) * pageSize).
		Limit(pageSize).
		Find(&dbList).Error
	if err != nil {
		return bus_models.SmsCommonNumberListResp{}, err
	}

	// 转换为返回结构体
	var respList []bus_models.SmsCommonNumber
	for _, item := range dbList {
		respList = append(respList, bus_models.SmsCommonNumber{
			Name:         item.Name,
			PhoneNumbers: item.PhoneNumbers,
			PhoneCount:   len(strings.Split(item.PhoneNumbers, ",")),
		})
	}

	totalPage := (total + int64(page) - 1) / int64(pageSize)
	if totalPage < 1 {
		totalPage = 1
	}

	return bus_models.SmsCommonNumberListResp{
		List:      respList,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}, nil
}

func (s *SmsService) AddCommonNumber(req bus_models.SmsCommonNumberAddReq, db *gorm.DB) error {
	if req.Name == "" {
		return errors.New("名称不能为空")
	}
	return db.Create(&bus_models.SmsCommonNumber{
		Name:         req.Name,
		PhoneNumbers: strings.Join(req.PhoneList, ","),
	}).Error
}

// AppendCommonNumber 向已有常用号码记录中追加号码（自动去重）
// 逻辑：获取原始号码列表 + 新号码列表 => 合并去重 => 更新保存
func (s *SmsService) AppendCommonNumber(req bus_models.SmsCommonNumberAppendReq, db *gorm.DB) error {
	var record bus_models.SmsCommonNumber
	err := db.Where("id = ?", req.ID).First(&record).Error
	if err != nil {
		return err
	}

	// 拆分原始号码
	originalNumbers := strings.Split(record.PhoneNumbers, ",")
	numberSet := make(map[string]struct{})

	// 原号码去重填入 map
	for _, num := range originalNumbers {
		num = strings.TrimSpace(num)
		if num != "" {
			numberSet[num] = struct{}{}
		}
	}
	// 新号码去重合并
	for _, num := range req.PhoneList {
		num = strings.TrimSpace(num)
		if num != "" {
			numberSet[num] = struct{}{}
		}
	}

	var deduplicated []string
	for num := range numberSet {
		deduplicated = append(deduplicated, num)
	}
	sort.Strings(deduplicated) // 方便前端对比、稳定输出顺序

	record.PhoneNumbers = strings.Join(deduplicated, ",")
	return db.Save(&record).Error
}

func (s *SmsService) GetCommonNumberDetail(id int64, db *gorm.DB) (bus_models.SmsCommonNumber, error) {
	var record bus_models.SmsCommonNumber
	err := db.First(&record, id).Error
	return record, err
}

func (s *SmsService) DeleteCommonNumbers(ids []uint64, db *gorm.DB) error {
	return db.Where("id IN (?)", ids).Delete(&bus_models.SmsCommonNumber{}).Error
}

// ExportCommonNumbers 导出多个常用号码名称下的所有号码到一个文件
func (s *SmsService) ExportCommonNumbers(req bus_models.SmsCommonNumberExportReq, db *gorm.DB) (string, error) {
	var records []bus_models.SmsCommonNumber

	query := db.Model(&bus_models.SmsCommonNumber{}).Order("id desc")
	if !req.All {
		if len(req.Ids) == 0 {
			return "", fmt.Errorf("未传入号码且未选择导出全部")
		}
		query = query.Where("id IN ?", req.Ids)
	}

	err := query.Find(&records).Error
	if err != nil {
		return "", err
	}

	if len(records) == 0 {
		return "", errors.New("未找到对应的常用号码数据")
	}

	// 创建文件
	fileName := time.Now().Format("20060102150405") + "_常用号码.xlsx"
	filePath := ExportFile + fileName
	fileUrl := MiGuExportUrl + fileName

	file, err := os.Create(filePath)
	if err != nil {
		return "", err
	}
	defer file.Close()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	// 写数据
	for _, record := range records {
		numbers := strings.Split(record.PhoneNumbers, ",")
		for _, number := range numbers {
			trimmed := strings.TrimSpace(number)
			if trimmed != "" {
				writer.Write([]string{trimmed})
			}
		}
	}

	return fileUrl, nil
}

func (s *SmsService) AddBlacklistNumber(req bus_models.BlacklistAddReq, db *gorm.DB) error {
	if len(req.PhoneList) == 0 {
		return fmt.Errorf("手机号列表不能为空")
	}

	var records []bus_models.SmsBlackList
	for _, phone := range req.PhoneList {
		records = append(records, bus_models.SmsBlackList{
			PhoneNumber: phone,
			Remark:      req.Remark,
		})
	}

	return db.Create(&records).Error
}

func (s *SmsService) ListBlacklist(req bus_models.BlacklistQuery, db *gorm.DB) (bus_models.BlacklistListResp, error) {
	var list []bus_models.SmsBlackList
	var total int64

	query := db.Model(&bus_models.SmsBlackList{})
	if req.PhoneNumber != "" {
		query = query.Where("phone_number LIKE ?", "%"+req.PhoneNumber+"%")
	}

	err := query.Count(&total).Error
	if err != nil {
		return bus_models.BlacklistListResp{}, err
	}

	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}

	err = query.Order("id desc").
		Offset((page - 1) * pageSize).
		Limit(pageSize).
		Find(&list).Error
	if err != nil {
		return bus_models.BlacklistListResp{}, err
	}

	totalPage := (total + int64(pageSize) - 1) / int64(pageSize)
	if totalPage < 1 {
		totalPage = 1
	}

	return bus_models.BlacklistListResp{
		List:      list,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}, nil
}

func (s *SmsService) ExportBlacklistToExcel(db *gorm.DB, req bus_models.ExportBlacklistRequest) (string, error) {
	var blacklists []bus_models.SmsBlackList
	query := db.Model(&bus_models.SmsBlackList{}).Order("id desc")

	if !req.All {
		if len(req.Ids) == 0 {
			return "", fmt.Errorf("未传入号码且未选择导出全部")
		}
		query = query.Where("id IN ?", req.Ids)
	}

	if err := query.Find(&blacklists).Error; err != nil {
		return "", err
	}

	if len(blacklists) == 0 {
		return "", fmt.Errorf("没有可导出的黑名单记录")
	}

	file := excelize.NewFile()
	sheet := "Sheet1"
	headers := []string{"手机号", "备注", "创建时间"}

	for i, h := range headers {
		col := string('A' + i)
		file.SetCellValue(sheet, col+"1", h)
	}

	for i, b := range blacklists {
		row := strconv.Itoa(i + 2)
		file.SetCellValue(sheet, "A"+row, b.PhoneNumber)
		file.SetCellValue(sheet, "B"+row, b.Remark)
		file.SetCellValue(sheet, "C"+row, b.CreatedAt.Format("2006-01-02 15:04:05"))
	}

	style, _ := file.NewStyle(&excelize.Style{
		Alignment: &excelize.Alignment{
			Horizontal: "center",
			Vertical:   "center",
		},
	})
	file.SetColWidth(sheet, "A", "C", 20)
	file.SetCellStyle(sheet, "A1", fmt.Sprintf("C%d", len(blacklists)+1), style)

	fileName := time.Now().Format("20060102150405") + "_导出黑名单.xlsx"
	filePath := ExportFile + fileName
	fileUrl := MiGuExportUrl + fileName

	if err := file.SaveAs(filePath); err != nil {
		logger.Errorf("导出黑名单失败: %v", err)
		return "", err
	}

	return fileUrl, nil
}

// DeleteBlacklist 批量删除黑名单记录
func (s *SmsService) DeleteBlacklist(ids []uint, db *gorm.DB) error {
	return db.Where("id IN ?", ids).Delete(&bus_models.SmsBlackList{}).Error
}

// CreateSmsTemplate 创建短信模版
func (s *SmsService) CreateSmsTemplate(data *bus_models.SmsTemplate, db *gorm.DB) error {
	return db.Create(data).Error
}

// DeleteSmsTemplates 批量删除短信模版
func (s *SmsService) DeleteSmsTemplates(ids []uint, db *gorm.DB) error {
	return db.Delete(&bus_models.SmsTemplate{}, ids).Error
}

// UpdateSmsTemplate 更新短信模版
func (s *SmsService) UpdateSmsTemplate(req *bus_models.SmsTemplateUpdateRequest, db *gorm.DB) error {
	var tmpl bus_models.SmsTemplate

	// 查找原始数据
	if err := db.First(&tmpl, req.ID).Error; err != nil {
		return fmt.Errorf("未找到指定的短信模版")
	}

	// 更新模版内容
	tmpl.Content = req.Content

	// 更新到期时间（如果传入了新的时间）
	if !req.ExpireAt.IsZero() {
		tmpl.ExpireAt = req.ExpireAt
	}

	// 更新更新时间
	tmpl.UpdatedAt = time.Now()

	// 保存更新后的模版
	return db.Save(&tmpl).Error
}

// ApproveSmsTemplate 审核短信模版
func (s *SmsService) ApproveSmsTemplate(id uint, status int, db *gorm.DB) error {
	return db.Model(&bus_models.SmsTemplate{}).
		Where("id = ?", id).
		Update("status", status).Error
}

func (s *SmsService) ListSmsTemplates(req bus_models.SmsTemplateQuery, db *gorm.DB) (bus_models.SmsTemplateListResp, error) {
	var list []bus_models.SmsTemplate
	var total int64

	query := db.Model(&bus_models.SmsTemplate{})

	if req.Content != "" {
		query = query.Where("content LIKE ?", "%"+req.Content+"%")
	}
	if req.Status != 0 {
		query = query.Where("status = ?", req.Status)
	}
	if !req.CreateStart.IsZero() && !req.CreateEnd.IsZero() {
		query = query.Where("created_at BETWEEN ? AND ?", req.CreateStart, req.CreateEnd)
	}

	err := query.Count(&total).Error
	if err != nil {
		return bus_models.SmsTemplateListResp{}, err
	}

	page := req.Page
	if page < 1 {
		page = 1
	}
	pageSize := req.PageSize
	if pageSize <= 0 {
		pageSize = 10
	}

	err = query.Order("id desc").
		Offset((page - 1) * pageSize).
		Limit(pageSize).
		Find(&list).Error
	if err != nil {
		return bus_models.SmsTemplateListResp{}, err
	}

	totalPage := (total + int64(pageSize) - 1) / int64(pageSize)
	if totalPage < 1 {
		totalPage = 1
	}

	return bus_models.SmsTemplateListResp{
		List:      list,
		Total:     total,
		Page:      page,
		PageSize:  pageSize,
		TotalPage: totalPage,
	}, nil
}

func (s *SmsService) ExportSmsTemplates(req bus_models.SmsTemplateExportReq, db *gorm.DB) (string, error) {
	var templates []bus_models.SmsTemplate

	query := db.Model(&bus_models.SmsTemplate{}).Order("id desc")
	if !req.All {
		if len(req.Ids) == 0 {
			return "", fmt.Errorf("未传入模版且未选择导出全部")
		}
		query = query.Where("id IN ?", req.Ids)
	}

	err := query.Find(&templates).Error
	if err != nil {
		return "", err
	}

	if len(templates) == 0 {
		return "", errors.New("未找到对应的短信模版数据")
	}

	// 生成文件
	fileName := time.Now().Format("20060102150405") + "_短信模版导出.csv"
	filePath := ExportFile + fileName
	fileUrl := MiGuExportUrl + fileName

	file, err := os.Create(filePath)
	if err != nil {
		return "", err
	}
	defer file.Close()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	// 写表头
	writer.Write([]string{"模版ID", "模版内容", "备注", "状态", "创建时间"})

	// 写内容
	for _, tmpl := range templates {
		status := map[int]string{
			0: "待审核",
			1: "正常",
			2: "审核拒绝",
			3: "已过期",
		}[tmpl.Status]

		writer.Write([]string{
			strconv.Itoa(int(tmpl.ID)),
			tmpl.Content,
			tmpl.Remark,
			status,
			tmpl.CreatedAt.Format("2006-01-02 15:04:05"),
		})
	}

	return fileUrl, nil
}