package homebannermod

import (
	"context"
	"fmt"
	"time"
	"videoweb/pub/common/log"
	"videoweb/pub/common/srvdef"
	"videoweb/pub/mongos"

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

var coll *mongos.Collection

// Init 初始化 home_banner 集合和常用查询索引
func Init(ctx context.Context) {
	coll = mongos.Shop.Coll(TN.HomeBanner)
	initIndex(ctx)
}

func initIndex(ctx context.Context) {
	indexes := []mongo.IndexModel{
		{
			Keys: bson.D{
				{Key: FN.HomeBanner.Status, Value: 1},
				{Key: FN.HomeBanner.UpdatedAt, Value: -1},
				{Key: FN.HomeBanner.Id, Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.HomeBanner.Name, Value: 1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.HomeBanner.CreatedAt, Value: -1},
				{Key: FN.HomeBanner.Id, Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.HomeBanner.Status, Value: 1},
				{Key: FN.HomeBanner.CreatedAt, Value: -1},
				{Key: FN.HomeBanner.Id, Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.HomeBanner.Status, Value: 1},
				{Key: FN.HomeBanner.Rank, Value: -1},
				{Key: FN.HomeBanner.Id, Value: -1},
			},
		},
	}
	if _, err := coll.CreateIndex(ctx, indexes); err != nil {
		panic(fmt.Sprintf("(homebannermod:initIndex) Create Index failed! err:%+v:", err))
	}
}

// InsertOneHomeBanner 插入一条首页 banner 数据
func InsertOneHomeBanner(ctx context.Context, doc *HomeBanner) *srvdef.SrvErr {
	if doc.Id == 0 {
		doc.Id = mongos.Lid.HomeBanner.Get()
	}
	now := time.Now()
	if doc.CreatedAt.IsZero() {
		doc.CreatedAt = now
	}
	doc.UpdatedAt = now
	if _, err := coll.InsertOne(ctx, doc); err != nil {
		log.Warn("homebannermod:InsertOneHomeBanner failed", log.Any("doc", doc), log.E(err))
		return srvdef.New(srvdef.ErrDbInsertError, "", "")
	}
	return nil
}

// DelOneHomeBanner 删除一条首页 banner 数据
func DelOneHomeBanner(ctx context.Context, filter bson.M) (int64, *srvdef.SrvErr) {
	count, err := coll.DeleteOne(ctx, filter)
	if err != nil {
		log.Warn("homebannermod:DelOneHomeBanner failed", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbDeleteError, "", "")
	}
	return count, nil
}

// FindOneHomeBanner 查询一条首页 banner 数据
func FindOneHomeBanner(ctx context.Context, filter bson.M, opts ...*options.FindOneOptions) (*HomeBanner, *srvdef.SrvErr) {
	var doc HomeBanner
	if err := coll.FindOneEx(ctx, &doc, filter, opts...); err != nil {
		if err != mongo.ErrNoDocuments {
			log.Warn("homebannermod:FindOneHomeBanner failed", log.E(err), log.Any("filter", filter))
			return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
		}
		return nil, srvdef.New(srvdef.ErrNoData, "", "")
	}
	return &doc, nil
}

// FindManyHomeBanner 按条件查询多条首页 banner 数据
func FindManyHomeBanner(ctx context.Context, filter bson.M, opts ...*options.FindOptions) (HomeBannerList, *srvdef.SrvErr) {
	data := make(HomeBannerList, 0)
	if err := coll.Find(ctx, &data, filter, opts...); err != nil {
		log.Warn("homebannermod:FindManyHomeBanner failed", log.E(err), log.Any("filter", filter))
		return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return data, nil
}

// CountHomeBanner 统计满足条件的首页 banner 数量
func CountHomeBanner(ctx context.Context, filter bson.M, opts ...*options.CountOptions) (int64, *srvdef.SrvErr) {
	count, err := coll.Count(ctx, filter, opts...)
	if err != nil {
		log.Warn("homebannermod:CountHomeBanner failed", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	return count, nil
}

// UpdateOneHomeBanner 更新一条首页 banner 数据
func UpdateOneHomeBanner(ctx context.Context, filter bson.M, update bson.M) *srvdef.SrvErr {
	result, err := coll.UpdateOne(ctx, filter, update)
	if err != nil {
		log.Warn("homebannermod:UpdateOneHomeBanner failed", log.E(err), log.Any("filter", filter))
		return srvdef.New(srvdef.ErrDbUpdateError, "", "")
	}
	if result.MatchedCount != 1 {
		return srvdef.New(srvdef.ErrNoData, "", "")
	}
	return nil
}