<?php

namespace App\Services;

use App\Enums\PaymentGateway;
use App\Enums\TransactionStatus;
use App\Enums\TransactionType;
use App\Models\User;
use App\Models\Wallet;
use App\Models\WalletActivityLog;
use App\Models\WalletTransaction;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

class WalletService
{
    /**
     * شارژ کیف پول توسط کاربر (آنلاین از طریق درگاه)
     */
    public function requestDeposit(
        Wallet $wallet,
        float $amount,
        string $description = 'شارژ آنلاین کیف پول',
        ?User $user = null,
        PaymentGateway $gateway = PaymentGateway::ZARINPAL
    ): WalletTransaction {
        if ($wallet->isFrozen()) {
            throw new \Exception('کیف پول شما مسدود است. لطفاً با پشتیبانی تماس بگیرید.');
        }

        $transaction = DB::transaction(function () use ($wallet, $amount, $description, $user, $gateway) {
            $transaction = WalletTransaction::create([
                'wallet_id' => $wallet->id,
                'amount' => $amount,
                'balance_before' => $wallet->balance,
                'balance_after' => $wallet->balance, // هنوز تغییر نکرده
                'type' => TransactionType::DEPOSIT,
                'status' => TransactionStatus::PENDING,
                'gateway' => $gateway,
                'description' => $description,
                'created_by' => $user?->id ?? auth()->id(),
                'ip_address' => request()->ip(),
                'user_agent' => request()->userAgent(),
            ]);

            // لاگ فعالیت
            WalletActivityLog::log(
                $wallet,
                'deposit_requested',
                "درخواست شارژ {$amount} ریال از طریق {$gateway->label()}",
                null,
                ['transaction_id' => $transaction->id, 'amount' => $amount],
                $user
            );

            return $transaction;
        });

        Log::info('Wallet deposit requested', [
            'wallet_id' => $wallet->id,
            'transaction_id' => $transaction->id,
            'amount' => $amount,
            'gateway' => $gateway->value,
        ]);

        return $transaction;
    }

    /**
     * تأیید و تکمیل تراکنش شارژ (بعد از callback درگاه)
     */
    public function completeDeposit(
        WalletTransaction $transaction,
        string $gatewayReferenceId,
        ?User $admin = null
    ): WalletTransaction {
        if ($transaction->status !== TransactionStatus::PENDING) {
            throw new \Exception('این تراکنش قابل تأیید نیست.');
        }

        return DB::transaction(function () use ($transaction, $gatewayReferenceId, $admin) {
            $wallet = $transaction->wallet;
            $oldBalance = $wallet->balance;

            // به‌روزرسانی موجودی کیف پول
            $wallet->increment('balance', $transaction->amount);
            $wallet->increment('total_deposited', $transaction->amount);

            // تأیید تراکنش
            $transaction->update([
                'status' => TransactionStatus::COMPLETED,
                'gateway_reference_id' => $gatewayReferenceId,
                'balance_after' => $wallet->balance,
                'approved_by' => $admin?->id,
                'approved_at' => now(),
            ]);

            // لاگ فعالیت
            WalletActivityLog::log(
                $wallet,
                'deposit_completed',
                "شارژ {$transaction->amount} ریال با موفقیت تکمیل شد. کد پیگیری: {$gatewayReferenceId}",
                ['balance' => $oldBalance],
                ['balance' => $wallet->balance, 'reference_id' => $gatewayReferenceId],
                $admin
            );

            Log::info('Wallet deposit completed', [
                'wallet_id' => $wallet->id,
                'transaction_id' => $transaction->id,
                'amount' => $transaction->amount,
                'reference_id' => $gatewayReferenceId,
            ]);

            return $transaction->fresh();
        });
    }

    /**
     * شارژ دستی توسط ادمین (پرداخت تلفنی یا کارت به کارت)
     */
    public function manualDeposit(
        Wallet $wallet,
        float $amount,
        string $description,
        User $admin,
        ?string $adminNotes = null
    ): WalletTransaction {
        if ($wallet->isFrozen()) {
            throw new \Exception('این کیف پول مسدود است.');
        }

        return DB::transaction(function () use ($wallet, $amount, $description, $admin, $adminNotes) {
            $oldBalance = $wallet->balance;

            // به‌روزرسانی موجودی
            $wallet->increment('balance', $amount);
            $wallet->increment('total_deposited', $amount);

            // ایجاد تراکنش
            $transaction = WalletTransaction::create([
                'wallet_id' => $wallet->id,
                'amount' => $amount,
                'balance_before' => $oldBalance,
                'balance_after' => $wallet->balance,
                'type' => TransactionType::DEPOSIT,
                'status' => TransactionStatus::COMPLETED,
                'gateway' => PaymentGateway::MANUAL,
                'description' => $description,
                'admin_notes' => $adminNotes,
                'created_by' => $admin->id,
                'approved_by' => $admin->id,
                'approved_at' => now(),
                'ip_address' => request()->ip(),
                'user_agent' => request()->userAgent(),
            ]);

            // لاگ فعالیت
            WalletActivityLog::log(
                $wallet,
                'manual_adjustment',
                "شارژ دستی {$amount} ریال توسط {$admin->name}. توضیحات: {$description}",
                ['balance' => $oldBalance],
                ['balance' => $wallet->balance, 'transaction_id' => $transaction->id],
                $admin
            );

            Log::info('Manual wallet deposit', [
                'wallet_id' => $wallet->id,
                'transaction_id' => $transaction->id,
                'amount' => $amount,
                'admin_id' => $admin->id,
                'description' => $description,
            ]);

            return $transaction;
        });
    }

    /**
     * کسر دستی توسط ادمین (بدهی مشتری یا جریمه)
     */
    public function manualWithdrawal(
        Wallet $wallet,
        float $amount,
        string $description,
        User $admin,
        ?string $adminNotes = null
    ): WalletTransaction {
        if ($wallet->isFrozen()) {
            throw new \Exception('این کیف پول مسدود است.');
        }

        if ($wallet->balance < $amount) {
            throw new \Exception('موجودی کیف پول کافی نیست.');
        }

        return DB::transaction(function () use ($wallet, $amount, $description, $admin, $adminNotes) {
            $oldBalance = $wallet->balance;

            // به‌روزرسانی موجودی
            $wallet->decrement('balance', $amount);
            $wallet->increment('total_withdrawn', $amount);

            // ایجاد تراکنش (مبلغ منفی)
            $transaction = WalletTransaction::create([
                'wallet_id' => $wallet->id,
                'amount' => -$amount,
                'balance_before' => $oldBalance,
                'balance_after' => $wallet->balance,
                'type' => TransactionType::WITHDRAWAL,
                'status' => TransactionStatus::COMPLETED,
                'gateway' => PaymentGateway::MANUAL,
                'description' => $description,
                'admin_notes' => $adminNotes,
                'created_by' => $admin->id,
                'approved_by' => $admin->id,
                'approved_at' => now(),
                'ip_address' => request()->ip(),
                'user_agent' => request()->userAgent(),
            ]);

            // لاگ فعالیت
            WalletActivityLog::log(
                $wallet,
                'manual_adjustment',
                "کسر دستی {$amount} ریال توسط {$admin->name}. توضیحات: {$description}",
                ['balance' => $oldBalance],
                ['balance' => $wallet->balance, 'transaction_id' => $transaction->id],
                $admin
            );

            Log::info('Manual wallet withdrawal', [
                'wallet_id' => $wallet->id,
                'transaction_id' => $transaction->id,
                'amount' => $amount,
                'admin_id' => $admin->id,
                'description' => $description,
            ]);

            return $transaction;
        });
    }

    /**
     * پرداخت سفارش از کیف پول
     */
    public function payOrder(
        Wallet $wallet,
        float $amount,
        string $description,
        $order = null
    ): WalletTransaction {
        if ($wallet->isFrozen()) {
            throw new \Exception('کیف پول شما مسدود است.');
        }

        if (!$wallet->hasSufficientBalance($amount)) {
            throw new \Exception('موجودی کیف پول کافی نیست.');
        }

        return DB::transaction(function () use ($wallet, $amount, $description, $order) {
            $oldBalance = $wallet->balance;

            // به‌روزرسانی موجودی
            $wallet->decrement('balance', $amount);
            $wallet->increment('total_withdrawn', $amount);

            // ایجاد تراکنش
            $transaction = WalletTransaction::create([
                'wallet_id' => $wallet->id,
                'amount' => -$amount,
                'balance_before' => $oldBalance,
                'balance_after' => $wallet->balance,
                'type' => TransactionType::ORDER_PAYMENT,
                'status' => TransactionStatus::COMPLETED,
                'gateway' => PaymentGateway::SYSTEM,
                'description' => $description,
                'created_by' => auth()->id(),
                'approved_by' => auth()->id(),
                'approved_at' => now(),
                'transactionable_type' => $order ? get_class($order) : null,
                'transactionable_id' => $order?->id,
                'ip_address' => request()->ip(),
                'user_agent' => request()->userAgent(),
            ]);

            // لاگ فعالیت
            WalletActivityLog::log(
                $wallet,
                'withdrawal_completed',
                "پرداخت سفارش {$amount} ریال",
                ['balance' => $oldBalance],
                ['balance' => $wallet->balance, 'transaction_id' => $transaction->id]
            );

            return $transaction;
        });
    }

    /**
     * شکست تراکنش
     */
    public function failTransaction(
        WalletTransaction $transaction,
        string $reason
    ): WalletTransaction {
        $transaction->fail($reason);

        // لاگ فعالیت
        WalletActivityLog::log(
            $transaction->wallet,
            $transaction->type === TransactionType::DEPOSIT ? 'deposit_failed' : 'withdrawal_failed',
            "تراکنش {$transaction->id} شکست خورد. دلیل: {$reason}",
            null,
            ['transaction_id' => $transaction->id, 'reason' => $reason]
        );

        Log::warning('Wallet transaction failed', [
            'transaction_id' => $transaction->id,
            'reason' => $reason,
        ]);

        return $transaction->fresh();
    }
}