package redisrpc

import (
	"encoding/json"
	"log"

	"github.com/golang/protobuf/proto"
)

//头部增加
func LLpush(key, field string, url ...string) (int64, error) {

	conn, _, err := Conn(url...)

	if err != nil {
		return 0, err
	}
	defer conn.Close()

	req := &LSetRequest{proto.String(key), proto.String(field), nil}

	res := &LSetResponse{}

	err = conn.LLpush(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}

//尾部增加
func LRpush(key, field string, url ...string) (int64, error) {

	conn, _, err := Conn(url...)

	if err != nil {
		return 0, err
	}
	defer conn.Close()

	req := &LSetRequest{proto.String(key), proto.String(field), nil}

	res := &LSetResponse{}

	err = conn.LRpush(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}

/**
 * 全部
 */
func LRange(key string, start, stop int64, url ...string) ([]string, error) {

	conn, _, err := Conn(url...)

	if err != nil {
		return []string{}, err
	}
	defer conn.Close()

	req := &LRangeRequest{proto.String(key), proto.Int64(start), proto.Int64(stop), nil}

	res := &HGetListResponse{}

	err = conn.LRange(req, res)

	if err != nil {
		return []string{}, err
	}

	value := res.GetList()

	var list []string

	err = json.Unmarshal(value, &list)

	if err != nil {
		log.Println("json unmarshal error:", err)
		return []string{}, err
	}
	return list, nil
}

//长度
func LLen(key string, url ...string) (int64, error) {

	conn, _, err := Conn(url...)

	if err != nil {
		return 0, err
	}
	defer conn.Close()

	req := &LLenRequest{proto.String(key), nil}

	res := &LSetResponse{}

	err = conn.LLen(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}