package utils

import (
	"encoding/json"
	"math/rand"
	"net/http"
	"time"
)

type LogError struct {
	Code      string `json:"code" db:"ErrorLogCode"`
	TraceID   string `json:"trace_id" db:"ErrorTraceID"`
	Type      string `json:"type" db:"ErrorLogType"`
	Params    string `json:"params" db:"ErrorLogParams"`
	Query     string `json:"query" db:"ErrorLogQuery"`
	Message   string `json:"message" db:"ErrorMessage"`
	TimeStamp string `json:"timestamp" db:"ErrorLogTimestamp"`
}

func (e *LogError) Error() string {
	return e.Message
}

func (e *LogError) LogError() LogError {
	return *e
}

func RandomTraceID(n int) string {
	src := rand.NewSource(time.Now().UnixNano())
	r := rand.New(src)

	const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

	b := make([]byte, n)
	for i := range b {
		b[i] = letterBytes[r.Intn(len(letterBytes))]
	}
	return string(b)
}

func WriteErrorLog(w http.ResponseWriter, status int, err LogError) {
	w.Header().Add("Content-Type", "application/json")
	w.WriteHeader(status)
	resp := map[string]any{"status": "ERR", "error": err}
	json.NewEncoder(w).Encode(resp)
}