package mysql

import (
	"fmt"
	"sync"

	"gorm.io/gorm"

	"github.com/pingcap-inc/pchub/internal/pkg/code"

	"github.com/pingcap-inc/pchub/internal/apiserver/store"
	"github.com/pingcap-inc/pchub/internal/pkg/logger"
	genericoptions "github.com/pingcap-inc/pchub/internal/pkg/option"
	"github.com/pingcap-inc/pchub/pkg/db"
	"github.com/pingcap-inc/pchub/pkg/errors"
)

type datastore struct {
	db *gorm.DB
}

func (ds *datastore) User() store.UserStore {
	return newUser(ds)
}

func (ds *datastore) Department() store.DepartmentStore {
	return newDepartment(ds)
}

func (ds *datastore) UserDepartment() store.UserDepartmentStore {
	return newUserDepartment(ds)
}

func (ds *datastore) CloudResource() store.CloudResourceStore {
	return newCloudResource(ds)
}

func (ds *datastore) CloudBudget() store.CloudBudgetStore {
	return newCloudBudget(ds)
}

func (ds *datastore) ResourceMemberAccess() store.ResourceMemberAccessStore {
	return newResourceMemberAccess(ds)
}

func (ds *datastore) CloudMemberRole() store.CloudMemberRoleStore {
	return newCloudMemberRole(ds)
}

func (ds *datastore) CloudProvider() store.CloudProviderStore {
	return newCloudProvider(ds)
}

func (ds *datastore) ApprovalType() store.ApprovalTypeStore {
	return newApprovalType(ds)
}

func (ds *datastore) Approval() store.ApprovalStore {
	return newApproval(ds)
}

func (ds *datastore) LarkApprWidget() store.LarkApprWidgetStore {
	return newLarkApprWidget(ds)
}

func (ds *datastore) CostAlert() store.CostAlertStore {
	return newCostAlert(ds)
}

func (ds *datastore) AlertRecord() store.AlertRecordStore {
	return newAlertRecord(ds)
}

func (ds *datastore) UserStarResource() store.UserStarResourceStore {
	return newUserStarResource(ds)
}

func (ds *datastore) CloudProductCost() store.CloudProductCostStore {
	return newCloudProductCost(ds)
}

func (ds *datastore) LarkChat() store.LarkChatStore {
	return newLarkChat(ds)
}

func (ds *datastore) PCHPermission() store.PCHPermissionStore {
	return newPCHPermission(ds)
}

func (ds *datastore) TrustAdvisor() store.TrustAdvisorStore {
	return newTrustAdvisor(ds)
}

func (ds *datastore) Close() error {
	dbins, err := ds.db.DB()
	if err != nil {
		return errors.Wrap(err, "get gorm db instance failed")
	}

	return dbins.Close()
}

func (ds *datastore) GetDB() *gorm.DB {
	return ds.db
}

var (
	mysqlFactory store.Factory
	once         sync.Once
)

// GetMySQLFactoryOr create mysql factory with the given config.
func GetMySQLFactoryOr(opts *genericoptions.MySQLOptions) (store.Factory, error) {
	if opts == nil && mysqlFactory == nil {
		return nil, fmt.Errorf("failed to get mysql store fatory")
	}

	var err error
	var dbIns *gorm.DB
	once.Do(func() {
		options := &db.Options{
			Host:                  opts.Host,
			Username:              opts.Username,
			Password:              opts.Password,
			Database:              opts.Database,
			MaxIdleConnections:    opts.MaxIdleConnections,
			MaxOpenConnections:    opts.MaxOpenConnections,
			MaxConnectionLifeTime: opts.MaxConnectionLifeTime,
			LogLevel:              opts.LogLevel,
			Logger:                logger.New(opts.LogLevel),
		}
		dbIns, err = db.New(options)
		mysqlFactory = &datastore{dbIns}
	})

	if mysqlFactory == nil || err != nil {
		return nil, fmt.Errorf("failed to get mysql store fatory, mysqlFactory: %+v, error: %w", mysqlFactory, err)
	}

	return mysqlFactory, nil
}

func dbNotFoundErrorWrap(er error) error {
	if er != nil {
		if errors.Is(er, gorm.ErrRecordNotFound) {
			return errors.WithCode(code.ErrRecordNotFound, "gorm.ErrRecordNotFound: %v", er.Error())
		}

		return errors.WithCode(code.ErrDatabase, "gorm.ErrRecordNotFound: %v", er.Error())
	}

	return nil
}