<?php

namespace App\Services\SmsBilling;

use App\Models\Setting;
use App\Models\SmsLedger;
use App\Models\SmsSendLog;
use App\Models\SmsWallet;
use Illuminate\Support\Facades\DB;

class SmsWalletService
{
    public const SUPER_ADMIN_MOBILE = '09128081392';

    public const TYPE_CHARGE = 'charge';
    public const TYPE_DEBIT = 'debit';
    public const TYPE_ALERT_DEBIT = 'alert_debit';

    /** Billing/panel فعال است مگر sms_panel صریحاً false باشد. */
    public static function isBillingEnabled(): bool
    {
        $value = Setting::where('key', 'sms_panel')->value('value');

        if ($value === null || trim((string) $value) === '') {
            return true;
        }

        $normalized = strtolower(trim((string) $value));

        return ! in_array($normalized, ['false', '0', 'no', 'off'], true);
    }

    public function getWallet(): SmsWallet
    {
        return SmsWallet::query()->firstOrCreate([], [
            'balance' => 0,
            'price_per_part' => 0,
            'is_blocked' => false,
            'alert_days_sent' => 0,
        ]);
    }

    public function isBlocked(): bool
    {
        if (! self::isBillingEnabled()) {
            return false;
        }

        return (bool) $this->getWallet()->is_blocked;
    }

    public function setBlocked(bool $blocked): SmsWallet
    {
        $wallet = $this->getWallet();
        $wallet->is_blocked = $blocked;
        $wallet->save();

        return $wallet->fresh();
    }

    public function updatePricePerPart(int $pricePerPart): SmsWallet
    {
        $wallet = $this->getWallet();
        $wallet->price_per_part = max(0, $pricePerPart);
        $wallet->save();

        return $wallet;
    }

    public function charge(int $amount, ?int $adminUserId = null, ?string $note = null): SmsWallet
    {
        if ($amount <= 0) {
            throw new \InvalidArgumentException('مبلغ شارژ باید بزرگتر از صفر باشد.');
        }

        return DB::transaction(function () use ($amount, $adminUserId, $note) {
            $wallet = SmsWallet::query()->lockForUpdate()->firstOrCreate([], [
                'balance' => 0,
                'price_per_part' => 0,
                'is_blocked' => false,
                'alert_days_sent' => 0,
            ]);

            $wallet->balance += $amount;

            if ($wallet->balance > 0) {
                $wallet->alert_days_sent = 0;
                $wallet->last_alert_date = null;
            }

            $wallet->save();

            SmsLedger::create([
                'type' => self::TYPE_CHARGE,
                'amount' => $amount,
                'balance_after' => $wallet->balance,
                'note' => $note,
                'created_by' => $adminUserId,
                'created_at' => now(),
            ]);

            return $wallet;
        });
    }

    /**
     * @return array{log: SmsSendLog, wallet: SmsWallet}
     */
    public function debitSuccessfulSms(
        string $receiver,
        string $body,
        int $parts,
        string $provider,
        ?string $source = null,
        bool $isAlert = false
    ): array {
        return DB::transaction(function () use ($receiver, $body, $parts, $provider, $source, $isAlert) {
            $wallet = SmsWallet::query()->lockForUpdate()->firstOrCreate([], [
                'balance' => 0,
                'price_per_part' => 0,
                'is_blocked' => false,
                'alert_days_sent' => 0,
            ]);

            $pricePerPart = (int) $wallet->price_per_part;
            $totalAmount = $parts * $pricePerPart;

            $wallet->balance -= $totalAmount;
            $wallet->save();

            $log = SmsSendLog::create([
                'receiver' => $receiver,
                'body' => $body,
                'parts' => $parts,
                'price_per_part' => $pricePerPart,
                'total_amount' => $totalAmount,
                'provider' => $provider,
                'source' => $source,
                'is_alert' => $isAlert,
                'created_at' => now(),
            ]);

            SmsLedger::create([
                'type' => $isAlert ? self::TYPE_ALERT_DEBIT : self::TYPE_DEBIT,
                'amount' => -$totalAmount,
                'balance_after' => $wallet->balance,
                'price_per_part' => $pricePerPart,
                'parts' => $parts,
                'sms_send_log_id' => $log->id,
                'note' => $isAlert ? 'هشدار موجودی پیامک' : null,
                'created_at' => now(),
            ]);

            return ['log' => $log, 'wallet' => $wallet->fresh()];
        });
    }

    public static function isSmsPanelSuperAdmin(?object $user): bool
    {
        if (! $user) {
            return false;
        }

        return self::normalizeMobile((string) ($user->mobile ?? '')) === self::SUPER_ADMIN_MOBILE;
    }

    public static function normalizeMobile(string $mobile): string
    {
        $digits = preg_replace('/\D/', '', $mobile) ?? '';

        if (str_starts_with($digits, '98') && strlen($digits) === 12) {
            $digits = '0'.substr($digits, 2);
        } elseif (strlen($digits) === 10 && str_starts_with($digits, '9')) {
            $digits = '0'.$digits;
        }

        return $digits;
    }
}