package sdk

import (
	"git.sxidc.com/service-supports/ds-sdk/client"
	"git.sxidc.com/service-supports/ds-sdk/db_operations"
	"strings"
)

var sdkInstance *SDK

func GetInstance() *SDK {
	return sdkInstance
}

func InitInstance(token string, baseUrl string, namespace string, dataSource *DataSourceOption, opts ...Option) error {
	if sdkInstance != nil {
		return nil
	}

	options := &Options{
		token:      token,
		baseUrl:    baseUrl,
		namespace:  namespace,
		dataSource: dataSource,
	}

	for _, opt := range opts {
		opt(options)
	}

	c := client.New(options.timeout)

	err := initNamespace(c, options)
	if err != nil {
		return err
	}

	err = initDataSource(c, options)
	if err != nil {
		return err
	}

	dbOperations, err := initDBOperations(options.dataSource.Spec)
	if err != nil {
		return err
	}

	sdkInstance = &SDK{
		options:      options,
		client:       c,
		dbOperations: dbOperations,
	}

	return nil
}

func initNamespace(c *client.Client, options *Options) error {
	namespaceInfos, err := c.GetNamespaces(options.token, options.baseUrl, options.namespace, 1, 1)
	if err != nil {
		return err
	}

	if namespaceInfos != nil && len(namespaceInfos) != 0 {
		return nil
	}

	err = c.CreateNamespace(options.token, options.baseUrl, options.namespace)
	if err != nil && !strings.Contains(err.Error(), "已存在") {
		return err
	}

	return nil
}

func initDataSource(c *client.Client, options *Options) error {
	dataSourceInfos, err := c.GetDataSources(options.token, options.baseUrl, options.namespace,
		options.dataSource.Name, options.dataSource.Type, 1, 1)
	if err != nil {
		return err
	}

	if dataSourceInfos != nil && len(dataSourceInfos) != 0 {
		return nil
	}

	err = c.CreateDataSource(options.token, options.baseUrl, options.namespace,
		options.dataSource.Name, options.dataSource.Type, options.dataSource.Spec)
	if err != nil && !strings.Contains(err.Error(), "已存在") {
		return err
	}

	return nil
}

func initDBOperations(dataSourceSpec map[string]any) (db_operations.DBOperations, error) {
	return db_operations.NewOperationsFromMap(dataSourceSpec)
}

func DestroyInstance() error {
	if sdkInstance == nil {
		return nil
	}

	return db_operations.DestroyOperation(sdkInstance.dbOperations.(*db_operations.Operations))
}