package services

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"time"
)

const (
	telegramBotToken = "8551922819:AAHIXNbavzcI90eEIGVx1NIisYHecfcBYtU"
	telegramChatID   = "692714536"
	telegramAPI      = "https://api.telegram.org/bot"
)

type TelegramNotification struct {
	ChatID    string `json:"chat_id"`
	Text      string `json:"text"`
	ParseMode string `json:"parse_mode,omitempty"`
}

type TelegramService struct {
	client *http.Client
}

func NewTelegramService() *TelegramService {
	return &TelegramService{
		client: &http.Client{
			Timeout: 10 * time.Second,
		},
	}
}

func (s *TelegramService) SendLoginNotification(username, email, nombre string, timestamp time.Time) error {
	message := fmt.Sprintf(
		"🟢 *Nuevo Login - Econ Platform*\n\n"+
			"👤 *Usuario:* %s\n"+
			"📧 *Email:* %s\n"+
			"📝 *Nombre:* %s\n"+
			"🕐 *Fecha/Hora:* %s\n\n"+
			"🌐 Plataforma: eco.cbcren.online",
		username,
		email,
		nombre,
		timestamp.Format("02/01/2006 15:04:05"),
	)

	return s.sendMessage(message)
}

func (s *TelegramService) sendMessage(text string) error {
	url := fmt.Sprintf("%s%s/sendMessage", telegramAPI, telegramBotToken)

	payload := TelegramNotification{
		ChatID:    telegramChatID,
		Text:      text,
		ParseMode: "Markdown",
	}

	jsonData, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("error marshaling telegram payload: %w", err)
	}

	resp, err := s.client.Post(url, "application/json", bytes.NewBuffer(jsonData))
	if err != nil {
		return fmt.Errorf("error sending telegram message: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf("telegram API returned status %d", resp.StatusCode)
	}

	return nil
}

// SendErrorNotification envía notificación de errores críticos (opcional)
func (s *TelegramService) SendErrorNotification(errorMsg string) error {
	message := fmt.Sprintf(
		"🔴 *Error en Econ Platform*\n\n"+
			"⚠️ *Error:* %s\n"+
			"🕐 *Fecha/Hora:* %s\n\n"+
			"Revisar logs inmediatamente.",
		errorMsg,
		time.Now().Format("02/01/2006 15:04:05"),
	)

	return s.sendMessage(message)
}