package redisrpc

import (
	"encoding/json"
	"log"
	"strconv"

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

/**
 * 使用用户名查询
 */
func HGetString(key, field string, url ...string) (string, error) {

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

	if err != nil {
		return "", err
	}

	defer conn.Close()

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

	res := &GetStringResponse{}

	err = conn.HGet(req, res)

	if err != nil {
		return "", err
	}

	return res.GetValue(), nil
}

//设置
func HSet(key, field, value string, url ...string) (int64, error) {

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

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

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

	res := &HSetResponse{}

	err = conn.HSet(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}

//删除
func HDel(key string, field string, url ...string) (int64, error) {

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

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

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

	res := &DelResponse{}

	err = conn.HDel(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}

/**
 * 全部
 */
func HGetAll(key string, url ...string) ([]map[string]string, error) {

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

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

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

	res := &HGetListResponse{}

	err = conn.HGetAll(req, res)

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

	value := res.GetList()

	var list []map[string]string

	err = json.Unmarshal(value, &list)

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

/**
 * 全部
 */
func HGetList(key string, url ...string) ([]string, error) {

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

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

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

	res := &HGetListResponse{}

	err = conn.HGetList(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
}

/**
 * hash键是否存在
 */
func HExists(key string, field string, url ...string) (int64, error) {
	conn, _, err := Conn(url...)

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

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

	res := &DelResponse{}

	err = conn.HExists(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}


func HIncrby(key, field string,value int, url ...string) (int64, error) {

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

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

	req := &HSetRequest{proto.String(key), proto.String(field), proto.String(strconv.Itoa(value)), nil}

	res := &HSetResponse{}

	err = conn.HIncrby(req, res)

	if err != nil {
		return 0, err
	}

	return res.GetRet(), nil
}