<?php

namespace App\Http\Controllers;

use App\Services\Billing\BillingClient;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;

/**
 * In-app wallet top-up. Posts to the central billing API to start a Paystack
 * checkout against the one Ladill wallet, then hands the user to checkout. Backs
 * the two-step "Add funds" modal so users never leave for the wallet page when a
 * transfer can't be afforded.
 */
class WalletTopupController extends Controller
{
    public function store(Request $request, BillingClient $billing): JsonResponse|RedirectResponse
    {
        $validated = $request->validate([
            'amount' => ['required', 'numeric', 'min:5', 'max:5000'],
            'return_url' => ['nullable', 'url', 'max:2048'],
        ]);

        $account = ladill_account();
        if ($account === null) {
            return $request->expectsJson()
                ? response()->json(['error' => 'Unauthenticated.'], 401)
                : redirect()->route('sso.connect');
        }

        $returnUrl = $validated['return_url'] ?? (string) (url()->previous() ?: route('transfer.transfers.create'));

        try {
            $checkoutUrl = $billing->topup((string) $account->public_id, (float) $validated['amount'], $returnUrl);
        } catch (\Throwable) {
            $checkoutUrl = '';
        }

        if ($checkoutUrl === '') {
            return $request->expectsJson()
                ? response()->json(['error' => 'Unable to start payment. Please try again.'], 422)
                : back()->with('error', 'Unable to start payment. Please try again.');
        }

        return $request->expectsJson()
            ? response()->json(['checkout_url' => $checkoutUrl])
            : redirect()->away($checkoutUrl);
    }
}