// Copyright (c) 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

/**
*@describe:
*@author wfl19/Kristas
*@date 2021/04/10
 */

package datasource_processor

import (
	"database/sql"
	"gitee.com/kristas/booting-go/framework/common/util/reflectx"
	"gitee.com/kristas/booting-go/framework/core/bean"
	"gitee.com/kristas/booting-go/framework/core/component"
	"gitee.com/kristas/booting-go/framework/data/wrapper_manager"
	"gitee.com/kristas/booting-go/framework/logging"
	"reflect"
)

type DatasourceInjectProcessor struct {
	Log logging.Logger `bean:"log"`
}

func (d *DatasourceInjectProcessor) Filter(bean bean.Bean) bool {
	_, ok := bean.(component.Repository)
	return ok
}

func (d *DatasourceInjectProcessor) Do(bean bean.Bean) {
	dbType := reflect.TypeOf(new(sql.DB))
	reflectx.WalkStructField(bean, func(field reflect.StructField, value reflect.Value) {
		if database, ok := field.Tag.Lookup("db"); ok && field.Type == dbType {
			wrapper := wrapper_manager.Get(database)
			if wrapper == nil {
				d.Log.Panicf("database [%s] in TAG not found", database)
			}
			value.Set(reflect.ValueOf(wrapper.DB()))
		}
	}, true)
}