package mongo

import (
	"context"
	"fmt"
	"fwh-toolbox-server/database"
	"fwh-toolbox-server/domain"
	"fwh-toolbox-server/dto"
	"time"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
	"go.uber.org/zap"
)

const (
	CollectionName_SimCardManage      = "SimCardManage"
	CollectionName_SimCardMonthlyData = "SimCardMonthlyData"
)

// 查询SIM卡信息(批量)
func GetSimCardBatchInfo(page, size uint, search string, status *string) (*dto.ResPage[domain.SimCardInfo], error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardManage)

	// 查询条件
	filter := bson.M{}

	// 搜索 _id (GICCID)
	if search != "" {
		filter["_id"] = bson.M{
			"$regex":   search,
			"$options": "i", // 不区分大小写，可去掉
		}
	}

	// 过滤状态
	if status != nil {
		filter["status"] = bson.M{
			"$eq": *status,
		}
	}

	findOptions := options.Find().
		SetSkip(int64((page - 1) * size)).
		SetLimit(int64(size)).
		SetSort(bson.D{
			{Key: "allDataUsage", Value: -1}, // 降序
		})

	cursor, err := collection.Find(ctx, filter, findOptions)
	if err != nil {
		return nil, err
	}
	defer cursor.Close(ctx)

	var infoList []domain.SimCardInfo
	for cursor.Next(ctx) {
		var info domain.SimCardInfo
		if err := cursor.Decode(&info); err != nil {
			return nil, err
		}
		infoList = append(infoList, info)
	}

	// 查询总数
	total, err := collection.CountDocuments(ctx, bson.M{})
	if err != nil {
		return nil, err
	}

	res := dto.ResPage[domain.SimCardInfo]{
		Data:     infoList,
		PageSize: size,
		PageNum:  page,
		Total:    uint(total),
	}

	return &res, nil
}

// 查询SIM卡信息(单卡)
func GetSimCardInfo(id string) (*domain.SimCardInfo, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardManage)

	var info domain.SimCardInfo
	err := collection.FindOne(ctx, bson.M{"_id": id}).Decode(&info)
	if err != nil {
		return nil, err
	}

	return &info, nil
}

// 查询SIM卡月数据(单卡)
func GetSimCardMonthlyData(month string, id string) (*domain.SimCardMonthlyData, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardMonthlyData)

	var info domain.SimCardMonthlyData
	err := collection.FindOne(ctx, bson.M{"simId": id, "month": month}).Decode(&info)
	if err != nil {
		return nil, err
	}

	return &info, nil
}

// 插入SIM卡基本信息数据
func UpdateSimCardInfo(info domain.SimCardInfo) error {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardManage)

	filter := bson.M{"_id": info.GICCID} // 按ID匹配

	_, err := collection.ReplaceOne(ctx, filter, info, options.Replace().SetUpsert(true))
	if err != nil {
		return err
	}

	return nil
}

// 批量插入SIM卡基本信息数据
func UpdateSimCardBatchInfo(infoList []domain.SimCardInfo) (int64, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardManage)

	batchSize := 1000
	var totalInserted int64

	for start := 0; start < len(infoList); start += batchSize {

		end := start + batchSize
		if end > len(infoList) {
			end = len(infoList)
		}

		models := make([]mongo.WriteModel, 0, end-start)

		for _, doc := range infoList[start:end] {

			model := mongo.NewReplaceOneModel().
				SetFilter(bson.M{
					"_id": doc.GICCID,
				}).
				SetReplacement(doc).
				SetUpsert(true)

			models = append(models, model)
		}

		result, err := collection.BulkWrite(
			ctx,
			models,
			options.BulkWrite().
				SetOrdered(false),
		)

		if err != nil {
			zap.L().Error("UpdateSimCardBatchInfo bulk insert failed.", zap.String("err", err.Error()), zap.Int("start", start), zap.Int("end", end), zap.Int64("totalInserted", totalInserted))
			return totalInserted, fmt.Errorf(
				"bulk insert failed (%d~%d): %w",
				start,
				end,
				err,
			)
		}

		totalInserted += result.InsertedCount
	}

	return totalInserted, nil
}

// 插入SIM卡日流量数据
func UpdateSimCardDayData(data domain.SimCardDayData) error {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardMonthlyData)

	dailyUsageField := fmt.Sprintf(
		"dailyUsage.%d",
		data.Day,
	)

	update := bson.M{
		"$set": bson.M{
			"allDataUsage":  data.AllDataUsage,
			"updateTime":    data.UpdateTime,
			dailyUsageField: data.DailyUsage,
		},
		"$setOnInsert": bson.M{
			"simId": data.SimId,
			"month": data.Month,
		},
	}

	filter := bson.M{"simId": data.SimId, "month": data.Month} // 按ID和month匹配

	_, err := collection.UpdateOne(ctx, filter, update, options.Update().SetUpsert(true))
	if err != nil {
		return err
	}

	return nil
}

// 批量插入SIM卡日流量数据
func UpdateSimCardBatchDayData(dataList []domain.SimCardDayData) (int64, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	collection := database.GetCollection(CollectionName_SimCardMonthlyData)

	batchSize := 1000
	var totalInserted int64

	for start := 0; start < len(dataList); start += batchSize {

		end := start + batchSize
		if end > len(dataList) {
			end = len(dataList)
		}

		models := make([]mongo.WriteModel, 0, end-start)

		for _, doc := range dataList[start:end] {

			dailyUsageField := fmt.Sprintf("dailyUsage.%d", doc.Day)

			update := bson.M{
				"$set": bson.M{
					"allDataUsage":  doc.AllDataUsage,
					"updateTime":    doc.UpdateTime,
					dailyUsageField: doc.DailyUsage,
				},
				"$setOnInsert": bson.M{
					"simId": doc.SimId,
					"month": doc.Month,
				},
			}

			model := mongo.NewUpdateOneModel().
				SetFilter(bson.M{
					"simId": doc.SimId,
					"month": doc.Month,
				}).
				SetUpdate(update).
				SetUpsert(true)

			models = append(models, model)
		}

		result, err := collection.BulkWrite(
			ctx,
			models,
			options.BulkWrite().
				SetOrdered(false),
		)

		if err != nil {
			zap.L().Error("UpdateSimCardBatchMonthlyData bulk insert failed.", zap.String("err", err.Error()), zap.Int("start", start), zap.Int("end", end), zap.Int64("totalInserted", totalInserted))
			return totalInserted, fmt.Errorf(
				"bulk insert failed (%d~%d): %w",
				start,
				end,
				err,
			)
		}

		totalInserted += result.InsertedCount
	}

	return totalInserted, nil
}