package playlethomeconfigmod

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 playlet_home_config 集合和常用查询索引
func Init(ctx context.Context) {
	coll = mongos.Shop.Coll(TN.PlayletHomeConfig)
	backfillSlugs(ctx)
	initIndex(ctx)
}

// backfillSlugs 为历史配置生成稳定路径标识
func backfillSlugs(ctx context.Context) {
	var docs PlayletHomeConfigList
	filter := bson.M{"$or": []bson.M{{FN.PlayletHomeConfig.Slug: bson.M{"$exists": false}}, {FN.PlayletHomeConfig.Slug: nil}, {FN.PlayletHomeConfig.Slug: ""}}}
	if err := coll.Find(ctx, &docs, filter, options.Find().SetProjection(bson.M{FN.PlayletHomeConfig.Id: 1})); err != nil {
		panic(fmt.Sprintf("(playlethomeconfigmod:backfillSlugs) Find failed! err:%+v", err))
	}
	for _, doc := range docs {
		if doc == nil {
			continue
		}
		if _, err := coll.UpdateOne(ctx, bson.M{FN.PlayletHomeConfig.Id: doc.Id, "$or": filter["$or"]}, bson.M{"$set": bson.M{FN.PlayletHomeConfig.Slug: fmt.Sprintf("home-config-%d", doc.Id)}}); err != nil {
			panic(fmt.Sprintf("(playlethomeconfigmod:backfillSlugs) UpdateOne failed! id:%d err:%+v", doc.Id, err))
		}
	}
}

func initIndex(ctx context.Context) {
	indexes := []mongo.IndexModel{
		{
			Keys: bson.D{
				{Key: FN.PlayletHomeConfig.Enabled, Value: 1},
				{Key: FN.PlayletHomeConfig.ModuleType, Value: 1},
				{Key: FN.PlayletHomeConfig.Rank, Value: -1},
				{Key: FN.PlayletHomeConfig.Id, Value: -1},
			},
		},
		{
			Keys: bson.D{
				{Key: FN.PlayletHomeConfig.CreatedAt, Value: -1},
				{Key: FN.PlayletHomeConfig.Id, Value: -1},
			},
		},
		{
			Keys:    bson.D{{Key: FN.PlayletHomeConfig.Slug, Value: 1}},
			Options: options.Index().SetUnique(true).SetName("slug_unique"),
		},
	}
	if _, err := coll.CreateIndex(ctx, indexes); err != nil {
		panic(fmt.Sprintf("(playlethomeconfigmod:initIndex) Create Index failed! err:%+v:", err))
	}
}

// InsertOnePlayletHomeConfig 插入一条首页配置
func InsertOnePlayletHomeConfig(ctx context.Context, doc *PlayletHomeConfig) *srvdef.SrvErr {
	if doc.Id == 0 {
		doc.Id = mongos.Lid.PlayletHomeConfig.Get()
	}
	now := time.Now()
	if doc.CreatedAt.IsZero() {
		doc.CreatedAt = now
	}
	normalizePlayletHomeConfig(doc)
	doc.UpdatedAt = now
	if _, err := coll.InsertOne(ctx, doc); err != nil {
		if mongo.IsDuplicateKeyError(err) {
			return srvdef.New(srvdef.ErrParamError, "slug已存在", "")
		}
		log.Warn("插入首页配置失败", log.Any("doc", doc), log.E(err))
		return srvdef.New(srvdef.ErrDbInsertError, "", "")
	}
	return nil
}

func normalizePlayletHomeConfig(doc *PlayletHomeConfig) {
	if doc == nil {
		return
	}
	if doc.ModuleType != ModuleTypeTopic {
		doc.ModuleType = ModuleTypePlaylet
	}
	if doc.DataType != DataTypeVideo {
		doc.DataType = DataTypeAll
	}
	if doc.Limit <= 0 {
		doc.Limit = DefaultLimit
	}
	if doc.Limit > MaxLimit {
		doc.Limit = MaxLimit
	}
}

// DelManyPlayletHomeConfig 删除多条首页配置
func DelManyPlayletHomeConfig(ctx context.Context, filter bson.M) (int64, *srvdef.SrvErr) {
	count, err := coll.DeleteMany(ctx, filter)
	if err != nil {
		log.Warn("删除首页配置失败", log.E(err), log.Any("filter", filter))
		return 0, srvdef.New(srvdef.ErrDbDeleteError, "", "")
	}
	return count, nil
}

// FindOnePlayletHomeConfig 查询一条首页配置
func FindOnePlayletHomeConfig(ctx context.Context, filter bson.M, opts ...*options.FindOneOptions) (*PlayletHomeConfig, *srvdef.SrvErr) {
	var doc PlayletHomeConfig
	if err := coll.FindOneEx(ctx, &doc, filter, opts...); err != nil {
		if err != mongo.ErrNoDocuments {
			log.Warn("查询首页配置失败", log.E(err), log.Any("filter", filter))
			return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
		}
		return nil, srvdef.New(srvdef.ErrNoData, "", "")
	}
	normalizePlayletHomeConfig(&doc)
	return &doc, nil
}

// FindManyPlayletHomeConfig 按条件查询多条首页配置
func FindManyPlayletHomeConfig(ctx context.Context, filter bson.M, opts ...*options.FindOptions) (PlayletHomeConfigList, *srvdef.SrvErr) {
	data := make(PlayletHomeConfigList, 0)
	if err := coll.Find(ctx, &data, filter, opts...); err != nil {
		log.Warn("查询首页配置列表失败", log.E(err), log.Any("filter", filter))
		return nil, srvdef.New(srvdef.ErrDbQueryError, "", "")
	}
	for _, item := range data {
		normalizePlayletHomeConfig(item)
	}
	return data, nil
}

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

// UpdateOnePlayletHomeConfig 更新一条首页配置
func UpdateOnePlayletHomeConfig(ctx context.Context, filter bson.M, update bson.M) *srvdef.SrvErr {
	result, err := coll.UpdateOne(ctx, filter, update)
	if err != nil {
		if mongo.IsDuplicateKeyError(err) {
			return srvdef.New(srvdef.ErrParamError, "slug已存在", "")
		}
		log.Warn("更新首页配置失败", log.E(err), log.Any("filter", filter))
		return srvdef.New(srvdef.ErrDbUpdateError, "", "")
	}
	if result.MatchedCount != 1 {
		return srvdef.New(srvdef.ErrNoData, "", "")
	}
	return nil
}