package es

import (
	"encoding/json"
	"errors"
	"fmt"
	"net"
	"net/http"
	"net/url"
	"time"

	"golib.gaore.com/GaoreGo/goes"
	"golib.gaore.com/GaoreGo/grlogs/logs"
)

// NewES return a LoggerInterface
func NewES() logs.Logger {
	cw := &esLogger{
		Level: logs.LevelDebug,
	}
	return cw
}

type esLogger struct {
	*goes.Client
	Username  string `json:"username"`
	Password  string `json:"password"`
	DSN       string `json:"dsn"`
	Level     int    `json:"level"`
	IndexName string `json:"index"`
}

// {"dsn":"http://localhost:9200/","level":1}
func (el *esLogger) Init(jsonconfig string) error {
	err := json.Unmarshal([]byte(jsonconfig), el)
	if err != nil {
		return err
	}
	if el.DSN == "" {
		return errors.New("empty dsn")
	} else if u, err := url.Parse(el.DSN); err != nil {
		return err
	} else if u.Path == "" {
		return errors.New("missing prefix")
	} else if host, port, err := net.SplitHostPort(u.Host); err != nil {
		return err
	} else {

		tr := &http.Transport{
			ResponseHeaderTimeout: 3 * time.Second,
		}

		cl := &http.Client{
			Transport: tr,
		}

		conn := goes.NewClient(host, port)
		conn.AuthUsername = el.Username
		conn.AuthPassword = el.Password
		conn.WithHTTPClient(cl)
		el.Client = conn
	}
	return nil
}

// WriteMsg will write the msg and level into es
func (el *esLogger) WriteMsg(when time.Time, msg string, level int, lable string, env string) error {
	if level > el.Level {
		return nil
	}

	vals := make(map[string]interface{})
	vals["@timestamp"] = when.Format(time.RFC3339)
	vals["@msg"] = msg
	vals["@level"] = level
	vals["level_string"] = logs.GetLevelString(level)
	vals["env"] = env
	vals["lable"] = lable

	if el.IndexName == "" {
		return errors.New("index name is empty")
	}

	d := goes.Document{
		Index:  fmt.Sprintf("%s-%04d.%02d.%02d", el.IndexName, when.Year(), when.Month(), when.Day()),
		Type:   "logs",
		Fields: vals,
	}
	_, err := el.Index(d, nil)
	return err
}

// Destroy is a empty method
func (el *esLogger) Destroy() {

}

// Flush is a empty method
func (el *esLogger) Flush() {

}

func init() {
	logs.Register(logs.AdapterEs, NewES)
}