<?php

namespace App\Services\Wallet;

use App\Enums\WalletTransactionReasonEnum;
use App\Enums\WithdrawRequestStatusEnum;
use App\Models\BankCard;
use App\Models\User;
use App\Models\WithdrawRequest;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

class WithdrawRequestService
{
    protected WalletService $walletService;

    public function __construct(WalletService $walletService)
    {
        $this->walletService = $walletService;
    }

    public function request(User $user, int $amount, BankCard $bankCard): WithdrawRequest
    {
        if ($bankCard->user_id !== $user->id) {
            throw ValidationException::withMessages(['bank_card_id' => 'کارت بانکی انتخاب‌شده معتبر نیست.']);
        }

        $balance = $this->walletService->forUser($user)->balance;

        $pendingAmount = WithdrawRequest::where('user_id', $user->id)
            ->where('status', WithdrawRequestStatusEnum::Pending->value)
            ->sum('amount');

        if ($amount + $pendingAmount > $balance) {
            throw ValidationException::withMessages(['amount' => 'مجموع مبلغ درخواست‌های برداشت از موجودی کیف پول شما بیشتر است.']);
        }

        return WithdrawRequest::create([
            'amount' => $amount,
            'status' => WithdrawRequestStatusEnum::Pending->value,
            'user_id' => $user->id,
            'bank_card_id' => $bankCard->id,
        ]);
    }

    public function approve(WithdrawRequest $withdrawRequest, User $admin): WithdrawRequest
    {
        return DB::transaction(function () use ($withdrawRequest, $admin) {
            $this->ensurePending($withdrawRequest);

            $this->walletService->withdraw(
                $withdrawRequest->user,
                $withdrawRequest->amount,
                WalletTransactionReasonEnum::Withdraw,
                null,
                $withdrawRequest
            );

            $this->walletService->depositToWallet(
                $this->walletService->system(),
                $withdrawRequest->amount,
                WalletTransactionReasonEnum::Withdraw,
                null,
                $withdrawRequest
            );

            $withdrawRequest->update([
                'status' => WithdrawRequestStatusEnum::Approved->value,
                'reviewed_at' => now(),
                'reviewed_by' => $admin->id,
            ]);

            return $withdrawRequest;
        });
    }

    public function reject(WithdrawRequest $withdrawRequest, User $admin, ?string $note = null): WithdrawRequest
    {
        $this->ensurePending($withdrawRequest);

        $withdrawRequest->update([
            'status' => WithdrawRequestStatusEnum::Rejected->value,
            'admin_note' => $note,
            'reviewed_at' => now(),
            'reviewed_by' => $admin->id,
        ]);

        return $withdrawRequest;
    }

    protected function ensurePending(WithdrawRequest $withdrawRequest): void
    {
        if ($withdrawRequest->status !== WithdrawRequestStatusEnum::Pending) {
            throw ValidationException::withMessages(['withdraw_request' => 'این درخواست قبلا بررسی شده است.']);
        }
    }
}