package core

import (
	"fmt"
	"gateway/config"
	"github.com/go-kit/kit/log"
	"github.com/grafana/loki-client-go/loki"
	"github.com/prometheus/common/model"
	"time"
)

type lokiClient struct {
	client *loki.Client
}

// 初始化Loki
func initLokiClient() lokiClient {
	config.InitLokiConfig()
	// 初始化配置
	cfg, err := loki.NewDefaultConfig(config.LokiConfig.GetPushURL())
	// 创建连接对象
	client, err := loki.NewWithLogger(cfg, log.NewNopLogger())
	if err != nil {
		Log.zap.Panicf("Loki初始化失败: %v", err.Error())
	}
	label := model.LabelSet{"job": "initialization"}
	label["source"] = model.LabelValue(config.LokiConfig.Source)
	label["level"] = "Debug"
	err = client.Handle(label, time.Now().Local(), "Loki服务连接成功")
	if err != nil {
		Log.zap.Errorf("日志推送到Loki失败: %v", err.Error())
	}
	return lokiClient{client: client}
}

// 发送日志到Loki
func (c lokiClient) send(level string, job string, logStr string) {
	label := model.LabelSet{"job": model.LabelValue(job)}
	label["source"] = model.LabelValue(config.LokiConfig.Source)
	label["level"] = model.LabelValue(level)
	err := c.client.Handle(label, time.Now().Local(), logStr)
	if err != nil {
		Log.zap.Errorf("日志推送到Loki失败: %v", err.Error())
	}
}

// Debug Debug日志
func (c lokiClient) Debug(job, template string, args ...interface{}) {
	logStr := template
	if len(args) > 0 {
		logStr = fmt.Sprintf(template, args...)
	}
	c.send("Debug", job, logStr)
}

// Info Info日志
func (c lokiClient) Info(job, template string, args ...interface{}) {
	logStr := template
	if len(args) > 0 {
		logStr = fmt.Sprintf(template, args...)
	}
	c.send("Info", job, logStr)
}

// Warn Warn日志
func (c lokiClient) Warn(job, template string, args ...interface{}) {
	logStr := template
	if len(args) > 0 {
		logStr = fmt.Sprintf(template, args...)
	}
	c.send("Warn", job, logStr)
}

// Error Error日志
func (c lokiClient) Error(job, template string, args ...interface{}) {
	logStr := template
	if len(args) > 0 {
		logStr = fmt.Sprintf(template, args...)
	}
	c.send("Error", job, logStr)
}