package api

import (
	"fmt"
	"time"

	"github.com/Sirupsen/logrus"
	"github.com/gin-gonic/gin"
	"github.com/jloup/utils"
)

var log = utils.StandardL().WithField("module", "api")

func Logger() gin.HandlerFunc {
	return func(c *gin.Context) {
		path := c.Request.URL.Path
		start := time.Now()
		rawQuery := c.Request.URL.RawQuery

		c.Next()

		latency := time.Now().Sub(start).Round(10 * time.Microsecond)
		code := c.Writer.Status()

		l := log
		l = l.WithField("latency", latency)
		l = l.WithField("client_ip", c.ClientIP())
		l = l.WithField("method", c.Request.Method)
		l = l.WithField("status_code", code)

		if _, exists := c.Get("user"); exists {
			l = l.WithField("user_id", GetUser(c).Id)
		}

		if rawQuery != "" {
			path = fmt.Sprintf("%s?%s", path, rawQuery)
		}

		l = l.WithField("path", path)

		msgLog := fmt.Sprintf("[%v] %d %s '%s'", latency, code, c.Request.Method, path)

		var level logrus.Level
		switch {
		case code >= 200 && code < 400:
			level = logrus.InfoLevel
		case code >= 400 && code < 500:
			level = logrus.WarnLevel
		default:
			level = logrus.ErrorLevel
		}

		errors := c.Errors.ByType(gin.ErrorTypePrivate)

		for _, err := range errors {
			l.Logf(level, "%s: %s", msgLog, err.Err)
		}

		if errors == nil {
			l.Logf(level, msgLog)
		}
	}
}