package elastic

import (
	"encoding/json"
	"fmt"
	es "gopkg.in/olivere/elastic.v2"
	"log"
	"runtime"
	"strings"
	"sync"
	"time"
)

type Elastic struct {
	S_esurl      string
	I_size       int
	Addrs        []string
	Pool         chan *es.Client
	lastTime     int64
	lastTimeLock sync.Mutex
	ntimeout     int
}

func (e *Elastic) InitElasticSize() {
	e.Pool = make(chan *es.Client, e.I_size)
	for _, s := range strings.Split(e.S_esurl, ",") {
		e.Addrs = append(e.Addrs, s)
	}
	for i := 0; i < e.I_size; i++ {
		client, _ := es.NewClient(es.SetURL(e.Addrs...), es.SetMaxRetries(2), es.SetSniff(false))
		e.Pool <- client
	}
}

//关闭连接
func (e *Elastic) DestoryEsConn(client *es.Client) {
	select {
	case e.Pool <- client:
		break
	case <-time.After(time.Second * 1):
		if client != nil {
			client.Stop()
		}
		client = nil
	}
}

func (e *Elastic) GetEsConn() *es.Client {
	select {
	case c := <-e.Pool:
		if c == nil || !c.IsRunning() {
			log.Println("new esclient.", len(e.Pool))
			client, err := es.NewClient(es.SetURL(e.Addrs...),
				es.SetMaxRetries(2), es.SetSniff(false))
			if err == nil && client.IsRunning() {
				return client
			}
		}
		return c
	case <-time.After(time.Second * 4):
		//超时
		e.ntimeout++
		e.lastTimeLock.Lock()
		defer e.lastTimeLock.Unlock()
		//12秒后允许创建链接
		c := time.Now().Unix() - e.lastTime
		if c > 12 {
			e.lastTime = time.Now().Unix()
			log.Println("add client..", len(e.Pool))
			c, _ := es.NewClient(es.SetURL(e.Addrs...), es.SetMaxRetries(2), es.SetSniff(false))
			go func() {
				for i := 0; i < 2; i++ {
					client, _ := es.NewClient(es.SetURL(e.Addrs...), es.SetMaxRetries(2), es.SetSniff(false))
					e.Pool <- client
				}
			}()
			return c
		}
		return nil
	}
}

func (e *Elastic) Get(index, itype, query string) *[]map[string]interface{} {
	client := e.GetEsConn()
	defer func() {
		go e.DestoryEsConn(client)
	}()
	var res []map[string]interface{}
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		searchResult, err := client.Search().Index(index).Type(itype).Source(query).Do()
		if err != nil {
			log.Println("从ES查询出错", err.Error())
			return nil
		}
		if searchResult.Hits != nil {
			resNum := len(searchResult.Hits.Hits)
			if resNum < 5000 {
				res = make([]map[string]interface{}, resNum)
				for i, hit := range searchResult.Hits.Hits {
					parseErr := json.Unmarshal(*hit.Source, &res[i])
					if parseErr == nil && hit.Highlight != nil && res[i] != nil {
						res[i]["highlight"] = map[string][]string(hit.Highlight)
					}
				}
			} else {
				log.Println("查询结果太多，查询到：", resNum, "条")
			}
		}
	}
	return &res
}

//关闭elastic
func (e *Elastic) Close() {
	for i := 0; i < e.I_size; i++ {
		cli := <-e.Pool
		cli.Stop()
		cli = nil
	}
	e.Pool = nil
	e = nil
}

//获取连接
//func (e *Elastic) GetEsConn() (c *es.Client) {
//	defer util.Catch()
//	select {
//	case c = <-e.Pool:
//		if c == nil || !c.IsRunning() {
//			client, err := es.NewClient(es.SetURL(addrs...),
//				es.SetMaxRetries(2), es.SetSniff(false))
//			if err == nil && client.IsRunning() {
//				return client
//			}
//			return nil
//		}
//		return
//	case <-time.After(time.Second * 7):
//		//超时
//		ntimeout++
//		log.Println("timeout times:", ntimeout)
//		return nil
//	}
//}

func (e *Elastic) BulkSave(index, itype string, obj *[]map[string]interface{}, isDelBefore bool) {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	if client != nil {
		req := client.Bulk()
		for _, v := range *obj {
			if isDelBefore {
				req = req.Add(es.NewBulkDeleteRequest().Index(index).Type(itype).Id(fmt.Sprintf("%v", v["_id"])))
			}
			req = req.Add(es.NewBulkIndexRequest().Index(index).Type(itype).Doc(v))
		}
		_, err := req.Do()
		if err != nil {
			log.Println("批量保存到ES出错", err.Error())
		}
	}
}

//根据id删除索引对象
func (e *Elastic) DelById(index, itype, id string) bool {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	b := false
	if client != nil {
		var err error
		_, err = client.Delete().Index(index).Type(itype).Id(id).Do()
		if err != nil {
			log.Println("更新检索出错:", err.Error())
		} else {
			b = true
		}
	}
	return b
}
func (e *Elastic) GetNoLimit(index, itype, query string) *[]map[string]interface{} {
	//log.Println("query  -- ", query)
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	var res []map[string]interface{}
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		searchResult, err := client.Search().Index(index).Type(itype).Source(query).Do()
		if err != nil {
			log.Println("从ES查询出错", err.Error())
			return nil
		}

		if searchResult.Hits != nil {
			resNum := len(searchResult.Hits.Hits)
			res = make([]map[string]interface{}, resNum)
			for i, hit := range searchResult.Hits.Hits {
				json.Unmarshal(*hit.Source, &res[i])
			}
		}
	}
	return &res
}
func (e *Elastic) GetByIdField(index, itype, id, fields string) *map[string]interface{} {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		query := `{"query":{"term":{"_id":"` + id + `"}}`
		if len(fields) > 0 {
			query = query + `,"_source":[` + fields + `]`
		}
		query = query + "}"
		searchResult, err := client.Search().Index(index).Type(itype).Source(query).Do()
		if err != nil {
			log.Println("从ES查询出错", err.Error())
			return nil
		}
		var res map[string]interface{}
		if searchResult.Hits != nil {
			resNum := len(searchResult.Hits.Hits)
			if resNum == 1 {
				res = make(map[string]interface{})
				for _, hit := range searchResult.Hits.Hits {
					json.Unmarshal(*hit.Source, &res)
				}
				return &res
			}
		}
	}
	return nil
}

func (e *Elastic) Count(index, itype string, query interface{}) int64 {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		var qq es.Query
		if qi, ok2 := query.(es.Query); ok2 {
			qq = qi
		}
		n, err := client.Count(index).Type(itype).Query(qq).Do()
		if err != nil {
			log.Println("统计出错", err.Error())
		}

		return n
	}
	return 0
}

//更新一个字段
func (e *Elastic) BulkUpdateArr(index, itype string, update []map[string]string) {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		for _, data := range update {
			id := data["id"]
			updateStr := data["updateStr"]
			if id != "" && updateStr != "" {
				_, err := client.Update().Index(index).Type(itype).Id(id).Script(updateStr).ScriptLang("groovy").Do()
				if err != nil {
					log.Println("更新检索出错:", err.Error())
				}
			} else {
				log.Println("数据错误")
			}
		}
	}
}

//更新多个字段
func (e *Elastic) BulkUpdateMultipleFields(index, itype string, arrs [][]map[string]interface{}) {
	client := e.GetEsConn()
	defer e.DestoryEsConn(client)
	if client != nil {
		defer func() {
			if r := recover(); r != nil {
				log.Println("[E]", r)
				for skip := 1; ; skip++ {
					_, file, line, ok := runtime.Caller(skip)
					if !ok {
						break
					}
					go log.Printf("%v,%v\n", file, line)
				}
			}
		}()
		for _, arr := range arrs {
			id := arr[0]["id"].(string)
			update := arr[1]["update"].([]string)
			for _, str := range update {
				_, err := client.Update().Index(index).Type(itype).Id(id).Script(str).ScriptLang("groovy").Do()
				if err != nil {
					log.Println("更新检索出错:", err.Error())
				}
			}
		}
	}
}