package config

import (
	"fmt"
	"os"
	"strconv"
	"strings"
)

type Config struct {
	BotToken         string
	BotDebug         bool
	TelegramAdminID  int64
	RemnawaveName         string
	RemnawaveURL          string
	RemnawaveToken        string
	RemnawaveCaddy        string
	RemnawaveSubscription string
}

func Load() (*Config, error) {
	token := strings.TrimSpace(os.Getenv("BOT_TOKEN"))
	if token == "" {
		return nil, fmt.Errorf("BOT_TOKEN не задан")
	}

	adminID, err := strconv.ParseInt(strings.TrimSpace(os.Getenv("TELEGRAM_ADMIN_ID")), 10, 64)
	if err != nil || adminID <= 0 {
		return nil, fmt.Errorf("TELEGRAM_ADMIN_ID не задан или неверный")
	}

	panelURL := strings.TrimRight(strings.TrimSpace(os.Getenv("REMNAWAVE_PANEL_URL")), "/")
	if panelURL == "" {
		return nil, fmt.Errorf("REMNAWAVE_PANEL_URL не задан")
	}
	if !strings.HasPrefix(panelURL, "http://") && !strings.HasPrefix(panelURL, "https://") {
		return nil, fmt.Errorf("REMNAWAVE_PANEL_URL должен начинаться с http:// или https://")
	}

	panelToken := strings.TrimSpace(os.Getenv("REMNAWAVE_API_TOKEN"))
	if panelToken == "" {
		return nil, fmt.Errorf("REMNAWAVE_API_TOKEN не задан (создайте в панели: Settings → API Tokens)")
	}

	name := strings.TrimSpace(os.Getenv("REMNAWAVE_PANEL_NAME"))
	if name == "" {
		name = "Панель 1"
	}

	subURL := strings.TrimRight(strings.TrimSpace(os.Getenv("REMNAWAVE_SUBSCRIPTION_URL")), "/")
	if subURL != "" && !strings.HasPrefix(subURL, "http://") && !strings.HasPrefix(subURL, "https://") {
		return nil, fmt.Errorf("REMNAWAVE_SUBSCRIPTION_URL должен начинаться с http:// или https://")
	}

	return &Config{
		BotToken:              token,
		BotDebug:              strings.EqualFold(strings.TrimSpace(os.Getenv("BOT_DEBUG")), "true"),
		TelegramAdminID:       adminID,
		RemnawaveName:         name,
		RemnawaveURL:          panelURL,
		RemnawaveToken:        panelToken,
		RemnawaveCaddy:        strings.TrimSpace(os.Getenv("REMNAWAVE_CADDY_TOKEN")),
		RemnawaveSubscription: subURL,
	}, nil
}