<?php

namespace App\Http\Controllers\Api;

use App\Enums\PaymentGateway;
use App\Http\Controllers\Controller;
use App\Models\User;
use App\Models\Wallet;
use App\Models\WalletActivityLog;
use App\Models\WalletTransaction;
use App\Services\WalletService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;

class WalletController extends Controller
{
    public function __construct(protected WalletService $walletService) {}

    /**
     * مشاهده موجودی کیف پول کاربر
     */
    public function balance(Request $request): JsonResponse
    {
        $user = $request->user();
        
        if (!$user) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }

        $wallet = $user->wallet;

        if (!$wallet) {
            $wallet = Wallet::create([
                'user_id' => $user->id,
                'balance' => 0,
                'total_deposited' => 0,
                'total_withdrawn' => 0,
            ]);
        }

        WalletActivityLog::log(
            $wallet,
            'balance_viewed',
            'مشاهده موجودی کیف پول',
            null,
            ['balance' => $wallet->balance],
            $user
        );

        return response()->json([
            'balance' => $wallet->balance,
            'total_deposited' => $wallet->total_deposited,
            'total_withdrawn' => $wallet->total_withdrawn,
            'is_frozen' => $wallet->isFrozen(),
            'currency' => 'IRR',
        ]);
    }

    /**
     * لیست تراکنش‌های کاربر (paginated)
     */
    public function transactions(Request $request): JsonResponse
    {
        $user = $request->user();
        
        if (!$user) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }

        $wallet = $user->wallet;

        if (!$wallet) {
            return response()->json([
                'transactions' => [],
                'total' => 0,
                'current_page' => 1,
            ]);
        }

        $perPage = $request->query('per_page', 15);
        $status = $request->query('status'); // pending, completed, failed
        $type = $request->query('type'); // deposit, withdrawal

        $query = $wallet->transactions()->orderByDesc('created_at');

        if ($status) {
            $query->where('status', $status);
        }

        if ($type) {
            $query->where('type', $type);
        }

        $transactions = $query->paginate($perPage);

        return response()->json([
            'transactions' => $transactions->map(fn ($t) => [
                'id' => $t->id,
                'amount' => $t->amount,
                'formatted_amount' => $t->formatted_amount,
                'type' => $t->type->label(),
                'status' => $t->status->label(),
                'status_code' => $t->status->value,
                'gateway' => $t->gateway?->label(),
                'reference_id' => $t->gateway_reference_id,
                'description' => $t->description,
                'created_at' => $t->created_at->toIso8601String(),
                'created_at_jalali' => \Morilog\Jalali\Jalalian::fromCarbon($t->created_at)->format('Y/m/d H:i'),
            ]),
            'total' => $transactions->total(),
            'current_page' => $transactions->currentPage(),
            'last_page' => $transactions->lastPage(),
        ]);
    }

    /**
     * شارژ/کسر دستی توسط ادمین
     */
    public function adminAdjust(Request $request): JsonResponse
    {
        $user = $request->user();
        
        if (!$user || !$user->isSuperAdmin()) {
            return response()->json(['message' => 'Forbidden — Only Super Admin can perform this action'], 403);
        }

        try {
            $validated = $request->validate([
                'user_id' => ['required', 'exists:users,id'],
                'amount' => ['required', 'numeric', 'not_in:0'], // مثبت = شارژ، منفی = کسر
                'description' => ['required', 'string', 'max:1000'],
                'admin_notes' => ['nullable', 'string', 'max:2000'],
            ]);
        } catch (ValidationException $e) {
            return response()->json([
                'message' => 'Validation failed',
                'errors' => $e->errors(),
            ], 422);
        }

        $targetUser = User::findOrFail($validated['user_id']);
        $wallet = $targetUser->wallet ?? Wallet::create([
            'user_id' => $targetUser->id,
            'balance' => 0,
        ]);

        try {
            $amount = abs($validated['amount']);

            if ($validated['amount'] > 0) {
                // شارژ
                $transaction = $this->walletService->manualDeposit(
                    wallet: $wallet,
                    amount: $amount,
                    description: $validated['description'],
                    admin: $user,
                    adminNotes: $validated['admin_notes'] ?? null
                );
                $message = 'شارژ دستی با موفقیت انجام شد';
            } else {
                // کسر
                $transaction = $this->walletService->manualWithdrawal(
                    wallet: $wallet,
                    amount: $amount,
                    description: $validated['description'],
                    admin: $user,
                    adminNotes: $validated['admin_notes'] ?? null
                );
                $message = 'کسر دستی با موفقیت انجام شد';
            }

            return response()->json([
                'message' => $message,
                'transaction_id' => $transaction->id,
                'target_user_id' => $targetUser->id,
                'target_user_name' => $targetUser->name,
                'balance_before' => $transaction->balance_before,
                'balance_after' => $transaction->balance_after,
                'amount' => $transaction->amount,
                'description' => $transaction->description,
                'admin_notes' => $transaction->admin_notes,
                'performed_by' => $user->name,
                'created_at' => $transaction->created_at->toIso8601String(),
            ]);

        } catch (\Exception $e) {
            return response()->json([
                'message' => 'خطا در انجام عملیات: ' . $e->getMessage(),
            ], 422);
        }
    }

    /**
     * مسدود کردن کیف پول (توسط ادمین)
     */
    public function freeze(Request $request, $walletId): JsonResponse
    {
        $user = $request->user();
        
        if (!$user || !$user->isSuperAdmin()) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $validated = $request->validate([
            'reason' => ['required', 'string', 'max:1000'],
        ]);

        $wallet = Wallet::findOrFail($walletId);
        $oldFrozen = $wallet->isFrozen();

        $wallet->freeze($validated['reason'], $user);

        WalletActivityLog::log(
            $wallet,
            'wallet_frozen',
            'کیف پول مسدود شد توسط ' . $user->name,
            ['is_frozen' => $oldFrozen],
            ['is_frozen' => true, 'reason' => $validated['reason']],
            $user
        );

        return response()->json([
            'message' => 'کیف پول با موفقیت مسدود شد',
            'wallet_id' => $wallet->id,
            'reason' => $validated['reason'],
        ]);
    }

    /**
     * رفع مسدودی کیف پول (توسط ادمین)
     */
    public function unfreeze(Request $request, $walletId): JsonResponse
    {
        $user = $request->user();
        
        if (!$user || !$user->isSuperAdmin()) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $wallet = Wallet::findOrFail($walletId);
        $oldReason = $wallet->freeze_reason;

        $wallet->unfreeze($user);

        WalletActivityLog::log(
            $wallet,
            'wallet_unfrozen',
            'کیف پول از مسدودی خارج شد توسط ' . $user->name,
            ['reason' => $oldReason],
            ['is_frozen' => false],
            $user
        );

        return response()->json([
            'message' => 'کیف پول با موفقیت از مسدودی خارج شد',
            'wallet_id' => $wallet->id,
        ]);
    }

    /**
     * مشاهده لاگ فعالیت‌های کیف پول (توسط ادمین)
     */
    public function activityLog(Request $request, $walletId): JsonResponse
    {
        $user = $request->user();
        
        if (!$user || !$user->isSuperAdmin()) {
            return response()->json(['message' => 'Forbidden'], 403);
        }

        $wallet = Wallet::findOrFail($walletId);
        $perPage = $request->query('per_page', 20);

        $logs = $wallet->activityLogs()->with('user')->paginate($perPage);

        return response()->json([
            'wallet_id' => $wallet->id,
            'user_name' => $wallet->user->name,
            'balance' => $wallet->balance,
            'is_frozen' => $wallet->isFrozen(),
            'freeze_reason' => $wallet->freeze_reason,
            'logs' => $logs->map(fn ($log) => [
                'id' => $log->id,
                'action' => $log->action,
                'description' => $log->description,
                'old_values' => $log->old_values,
                'new_values' => $log->new_values,
                'performed_by' => $log->user?->name ?? 'سیستم',
                'ip_address' => $log->ip_address,
                'created_at' => $log->created_at->toIso8601String(),
                'created_at_jalali' => \Morilog\Jalali\Jalalian::fromCarbon($log->created_at)->format('Y/m/d H:i'),
            ]),
            'total' => $logs->total(),
            'current_page' => $logs->currentPage(),
            'last_page' => $logs->lastPage(),
        ]);
    }
}