package mdbc

import (
	"context"
	"fmt"
	"time"

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

type ClientInit struct {
	*mongo.Client
}

var (
	ci *ClientInit
)

type Database struct {
	*mongo.Database
	dbname string
}

type Collection struct {
	*mongo.Collection
	dbname  string
	colname string
}

//ConnInit 初始化mongo
func ConnInit(config *Config) (*ClientInit, error) {
	if config == nil {
		return nil, fmt.Errorf("config nil")
	}
	if config.URI == "" {
		return nil, fmt.Errorf("empty uri")
	}
	if config.MinPoolSize == 0 {
		config.MinPoolSize = 1
	}
	if config.MaxPoolSize == 0 {
		config.MaxPoolSize = 32
	}
	var timeout time.Duration
	if config.ConnTimeout == 0 {
		config.ConnTimeout = 10
	}
	timeout = time.Duration(config.ConnTimeout) * time.Second
	if config.ReadPreference == nil {
		config.ReadPreference = readpref.PrimaryPreferred()
	}

	op := options.Client().ApplyURI(config.URI).SetMinPoolSize(config.MinPoolSize).
		SetMaxPoolSize(config.MaxPoolSize).SetConnectTimeout(timeout).
		SetReadPreference(config.ReadPreference)

	if config.RegistryBuilder != nil {
		op.SetRegistry(config.RegistryBuilder.Build())
	}

	c, err := mongo.NewClient(op)
	if err != nil {
		return nil, err
	}
	var ctx = context.Background()
	err = c.Connect(ctx)
	if err != nil {
		return nil, err
	}
	err = c.Ping(ctx, readpref.Primary())
	if err != nil {
		return nil, err
	}
	ci = &ClientInit{c}
	return ci, nil
}

func (c *ClientInit) Database(dbname string, opts ...*options.DatabaseOptions) *Database {
	db := c.Client.Database(dbname, opts...)
	return &Database{db, dbname}
}

func (db *Database) Collection(collection string, opts ...*options.CollectionOptions) *Collection {
	col := db.Database.Collection(collection, opts...)
	return &Collection{col, db.dbname, collection}
}

func (col *Collection) InsertOne(ctx context.Context, document interface{},
	opts ...*options.InsertOneOptions) (*mongo.InsertOneResult, error) {
	res, err := col.Collection.InsertOne(ctx, document, opts...)
	return res, err
}

func (col *Collection) InsertMany(ctx context.Context, documents []interface{},
	opts ...*options.InsertManyOptions) (*mongo.InsertManyResult, error) {
	res, err := col.Collection.InsertMany(ctx, documents, opts...)
	return res, err
}

func (col *Collection) DeleteOne(ctx context.Context, filter interface{},
	opts ...*options.DeleteOptions) (*mongo.DeleteResult, error) {
	res, err := col.Collection.DeleteOne(ctx, filter, opts...)
	return res, err
}

func (col *Collection) DeleteMany(ctx context.Context, filter interface{},
	opts ...*options.DeleteOptions) (*mongo.DeleteResult, error) {
	res, err := col.Collection.DeleteMany(ctx, filter, opts...)
	return res, err
}

func (col *Collection) UpdateOne(ctx context.Context, filter interface{}, update interface{},
	opts ...*options.UpdateOptions) (*mongo.UpdateResult, error) {
	res, err := col.Collection.UpdateOne(ctx, filter, update, opts...)
	return res, err
}

func (col *Collection) UpdateMany(ctx context.Context, filter interface{}, update interface{},
	opts ...*options.UpdateOptions) (*mongo.UpdateResult, error) {
	res, err := col.Collection.UpdateMany(ctx, filter, update, opts...)
	return res, err
}

func (col *Collection) ReplaceOne(ctx context.Context, filter interface{},
	replacement interface{}, opts ...*options.ReplaceOptions) (*mongo.UpdateResult, error) {
	res, err := col.Collection.ReplaceOne(ctx, filter, replacement, opts...)
	return res, err
}

func (col *Collection) Aggregate(ctx context.Context, pipeline interface{},
	opts ...*options.AggregateOptions) (*mongo.Cursor, error) {
	res, err := col.Collection.Aggregate(ctx, pipeline, opts...)
	return res, err
}

func (col *Collection) CountDocuments(ctx context.Context, filter interface{},
	opts ...*options.CountOptions) (int64, error) {
	res, err := col.Collection.CountDocuments(ctx, filter, opts...)
	return res, err
}

func (col *Collection) Distinct(ctx context.Context, fieldName string, filter interface{},
	opts ...*options.DistinctOptions) ([]interface{}, error) {
	res, err := col.Collection.Distinct(ctx, fieldName, filter, opts...)
	return res, err
}

func (col *Collection) Find(ctx context.Context, filter interface{},
	opts ...*options.FindOptions) (*mongo.Cursor, error) {
	res, err := col.Collection.Find(ctx, filter, opts...)
	return res, err
}

func (col *Collection) FindOne(ctx context.Context, filter interface{},
	opts ...*options.FindOneOptions) *mongo.SingleResult {
	res := col.Collection.FindOne(ctx, filter, opts...)
	return res
}

func (col *Collection) FindOneAndDelete(ctx context.Context, filter interface{},
	opts ...*options.FindOneAndDeleteOptions) *mongo.SingleResult {
	res := col.Collection.FindOneAndDelete(ctx, filter, opts...)
	return res
}

func (col *Collection) FindOneAndReplace(ctx context.Context, filter interface{},
	replacement interface{}, opts ...*options.FindOneAndReplaceOptions) *mongo.SingleResult {
	res := col.Collection.FindOneAndReplace(ctx, filter, replacement, opts...)
	return res
}

func (col *Collection) FindOneAndUpdate(ctx context.Context, filter interface{},
	update interface{}, opts ...*options.FindOneAndUpdateOptions) *mongo.SingleResult {
	res := col.Collection.FindOneAndUpdate(ctx, filter, update, opts...)
	return res
}

func (col *Collection) Watch(ctx context.Context, pipeline interface{},
	opts ...*options.ChangeStreamOptions) (*mongo.ChangeStream, error) {
	res, err := col.Collection.Watch(ctx, pipeline, opts...)
	return res, err
}

func (col *Collection) Indexes(ctx context.Context) mongo.IndexView {
	res := col.Collection.Indexes()
	return res
}

func (col *Collection) Drop(ctx context.Context) error {
	err := col.Collection.Drop(ctx)
	return err
}

func (col *Collection) BulkWrite(ctx context.Context, models []mongo.WriteModel,
	opts ...*options.BulkWriteOptions) (*mongo.BulkWriteResult, error) {
	res, err := col.Collection.BulkWrite(ctx, models, opts...)
	return res, err
}