package service

import (
	"fmt"
	"reflect"

	cda "git.loafle.net/commons/di-go/annotation"
	cdr "git.loafle.net/commons/di-go/registry"
	logging "git.loafle.net/commons/logging-go"
	"git.loafle.net/overflow/crawler-go"

	// For annotation
	_ "git.loafle.net/overflow/commons-go/core/annotation"
)

var CrawlerServiceType = reflect.TypeOf((*CrawlerService)(nil))

func init() {
	cdr.RegisterType(CrawlerServiceType)
}

type CrawlerService struct {
	cda.TypeAnnotation `annotation:"@overflow:RPCService()"`

	SensorConfigService *SensorConfigService       `annotation:"@Inject()"`
	Crawlers            map[string]crawler.Crawler `annotation:"@Resource(name=CONTAINER_CRAWLERS)"`
}

func (s *CrawlerService) InitService() error {
	if nil == s.Crawlers {
		return fmt.Errorf("Crawlers is not set")
	}

	return nil
}

func (s *CrawlerService) StartService() error {

	return nil
}

func (s *CrawlerService) StopService() {

}

func (s *CrawlerService) DestroyService() {

}

func (s *CrawlerService) Auth(crawlerName string, auth map[string]string) error {
	_crawler, ok := s.Crawlers[crawlerName]
	if !ok {
		return fmt.Errorf("There is no crawler[%s]", crawlerName)
	}

	logging.Logger().Debugf("Auth invoked with [%v]", auth)

	err := _crawler.Auth(auth)
	if nil != err {
		return fmt.Errorf("Failed to authentication from crawler[%s] %v", crawlerName, err)
	}
	logging.Logger().Debugf("Auth success with[%v]", auth)

	return nil
}

func (s *CrawlerService) Get(sensorConfigID string) (map[string]string, error) {
	sensorConfig, ok := s.SensorConfigService.sensorConfigs[sensorConfigID]
	if !ok {
		return nil, fmt.Errorf("There is no sensor config for id[%s]", sensorConfigID)
	}
	_crawlerName := sensorConfig.Crawler.Name
	_crawler, ok := s.Crawlers[_crawlerName]
	if !ok {
		return nil, fmt.Errorf("There is no crawler[%s] for id[%s]", _crawlerName, sensorConfigID)
	}

	logging.Logger().Debugf("Get invoked with sensor config[%s]", sensorConfigID)

	result, err := _crawler.Get(sensorConfig)
	if nil != err {
		return nil, fmt.Errorf("Failed to get data from crawler[%s] for id[%s] %v", _crawlerName, sensorConfigID, err)
	}
	logging.Logger().Debugf("Get success config[%v]", result)

	return result, nil
}