<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\User;
use App\Models\Shipment;
use App\Models\WalletTransaction;
use App\Enums\ShipmentStatus;
use App\Services\CustomerCreditService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class CustomerFinancialController extends Controller
{
    /**
     * جستجوی مشتری بر اساس نام یا ایمیل
     * GET /api/v1/staff/customers/search?q=search_term
     */
    public function search(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'q' => ['required', 'string', 'min:2'],
        ]);

        $query = User::query()
            ->where(function ($q) use ($validated) {
                $q->where('name', 'LIKE', "%{$validated['q']}%")
                  ->orWhere('email', 'LIKE', "%{$validated['q']}%")
                  ->orWhere('phone', 'LIKE', "%{$validated['q']}%");
            })
            ->with('wallet');

        $customers = $query->take(20)->get()->map(function ($customer) {
            return [
                'id' => $customer->id,
                'name' => $customer->name,
                'email' => $customer->email,
                'phone' => $customer->phone,
                'wallet_balance' => $customer->wallet ? $customer->wallet->balance : 0,
            ];
        });

        return response()->json([
            'success' => true,
            'data' => $customers,
        ]);
    }

    /**
     * دریافت وضعیت مالی کامل مشتری
     * GET /api/v1/staff/customers/{customer}/financial-status
     */
    public function financialStatus(User $customer): JsonResponse
    {
        // دریافت سفارشات در انتظار پرداخت (تأیید شده)
        $pending_orders = Shipment::where('user_id', $customer->id)
            ->where('status', ShipmentStatus::Approved)
            ->with(['fromCountry', 'toCountry'])
            ->orderBy('created_at', 'desc')
            ->get();

        // بدهی‌های چندارزی واقعی (از customer_credits) — به ارز خارجی، نه معادل ریالی
        $foreign_credits = app(CustomerCreditService::class)->getCustomerDebtsByCurrency($customer);

        // دریافت تراکنش‌های اخیر
        $recent_transactions = WalletTransaction::whereHas('wallet', function ($q) use ($customer) {
            $q->where('user_id', $customer->id);
        })
            ->orderBy('created_at', 'desc')
            ->take(10)
            ->get()
            ->map(fn ($tx) => [
                'id' => $tx->id,
                'type' => $tx->type,
                'amount' => $tx->amount,
                'description' => $tx->description,
                'created_at' => $tx->created_at->format('Y-m-d H:i'),
            ]);

        // دریافت سفارشات اخیر
        $recent_orders = Shipment::where('user_id', $customer->id)
            ->with(['fromCountry', 'toCountry'])
            ->orderBy('created_at', 'desc')
            ->take(10)
            ->get()
            ->map(fn ($order) => [
                'id' => $order->id,
                'awb_no' => $order->awb_no,
                'status' => [
                    'value' => $order->status?->value,
                    'label' => $order->status?->label(),
                ],
                'direction' => $order->direction?->value,
                'total_fee' => $order->total_fee,
                'from_country' => $order->fromCountry?->name,
                'to_country' => $order->toCountry?->name,
                'created_at' => $order->created_at->format('Y-m-d H:i'),
            ]);

        // تعهدات ریالی (سفارشات تأییدشده‌ی پرداخت‌نشده)
        $total_pending_irr = $pending_orders->sum('total_fee');

        // موجودی کیف پول
        $wallet_balance = $customer->wallet ? $customer->wallet->balance : 0;

        // مانده حساب = کیف پول منهای تعهدات ریالی
        // بدهی‌های چندارزی (foreign_credits) جداگانه تسویه می‌شوند و از کیف پول کسر نمی‌شوند.
        $account_balance = $wallet_balance - $total_pending_irr;

        return response()->json([
            'success' => true,
            'customer' => [
                'id' => $customer->id,
                'name' => $customer->name,
                'email' => $customer->email,
                'phone' => $customer->phone,
            ],
            'financial' => [
                'wallet_balance' => $wallet_balance,
                'account_balance' => $account_balance,
                'total_pending_irr' => $total_pending_irr,
                'pending_orders_count' => $pending_orders->count(),
                'foreign_credits' => $foreign_credits,
            ],
            'recent_transactions' => $recent_transactions,
            'recent_orders' => $recent_orders,
        ]);
    }
}