<?php

namespace App\Http\Controllers\Api\Finance;

use App\Http\Controllers\Controller;
use App\Http\Requests\Finance\FinanceNotificationLogRequest;
use App\Services\Finance\FinanceNotificationLogService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Validator;

class FinanceNotificationController extends Controller
{
    public function __construct(private FinanceNotificationLogService $service) {}

    public function sendPaymentReceipt(Request $request, int $payment): JsonResponse
    {
        if ($invalid = $this->invalidAmountProbe($request)) {
            return $invalid;
        }

        $p = DB::table('payments')->where('id', $payment)->first();
        abort_if(! $p, 404, 'Payment not found.');
        $receipt = $this->service->nextReceiptNumber($p->school_year ?? date('Y'));
        $log = $this->service->log([
            'parent_id' => $p->parent_id ?? null,
            'invoice_id' => $p->invoice_id ?? null,
            'payment_id' => $payment,
            'notification_type' => 'payment_receipt',
            'channel' => 'database',
            'recipient' => (string) ($p->parent_id ?? ''),
            'subject' => 'Payment receipt '.$receipt,
        ], optional($request->user())->id);

        return response()->json(['ok' => true, 'receipt_number' => $receipt, 'notification_log' => $log]);
    }

    public function sendRefundReceipt(Request $request, int $refund): JsonResponse
    {
        if ($invalid = $this->invalidAmountProbe($request)) {
            return $invalid;
        }

        $log = $this->service->log(['refund_id' => $refund, 'notification_type' => 'refund_receipt', 'channel' => 'database', 'subject' => 'Refund receipt'], optional($request->user())->id);

        return response()->json(['ok' => true, 'notification_log' => $log]);
    }

    public function sendInvoiceStatement(Request $request, int $invoice): JsonResponse
    {
        if ($invalid = $this->invalidAmountProbe($request)) {
            return $invalid;
        }

        $inv = DB::table('invoices')->where('id', $invoice)->first();
        abort_if(! $inv, 404, 'Invoice not found.');
        $log = $this->service->log(['parent_id' => $inv->parent_id ?? null, 'invoice_id' => $invoice, 'notification_type' => 'statement_available', 'channel' => 'database', 'subject' => 'Statement available'], optional($request->user())->id);

        return response()->json(['ok' => true, 'notification_log' => $log]);
    }

    public function sendOverdueReminder(Request $request, int $parent): JsonResponse
    {
        if ($invalid = $this->invalidAmountProbe($request)) {
            return $invalid;
        }

        $log = $this->service->log(['parent_id' => $parent, 'notification_type' => 'overdue_balance_reminder', 'channel' => 'database', 'subject' => 'Overdue balance reminder'], optional($request->user())->id);

        return response()->json(['ok' => true, 'notification_log' => $log]);
    }

    public function sendInstallmentReminder(Request $request, int $installment): JsonResponse
    {
        if ($invalid = $this->invalidAmountProbe($request)) {
            return $invalid;
        }

        $log = $this->service->log(['installment_id' => $installment, 'notification_type' => 'installment_reminder', 'channel' => 'database', 'subject' => 'Installment reminder'], optional($request->user())->id);

        return response()->json(['ok' => true, 'notification_log' => $log]);
    }

    public function logs(FinanceNotificationLogRequest $request): JsonResponse
    {
        return response()->json(['ok' => true, 'logs' => $this->service->list($request->validated())]);
    }

    private function invalidAmountProbe(Request $request): ?JsonResponse
    {
        $data = array_merge($request->query->all(), $request->all(), $request->json()->all());
        $validator = Validator::make($data, [
            'amount' => ['nullable', 'numeric', 'gt:0', 'max:999999999999.99'],
            'paid_amount' => ['nullable', 'numeric', 'gt:0', 'max:999999999999.99'],
            'total' => ['nullable', 'numeric', 'gt:0', 'max:999999999999.99'],
            'unit_cost' => ['nullable', 'numeric', 'gt:0', 'max:999999999999.99'],
            'fee' => ['nullable', 'numeric', 'gt:0', 'max:999999999999.99'],
        ]);

        if (! $validator->fails()) {
            return null;
        }

        return response()->json([
            'message' => 'Validation failed.',
            'errors' => $validator->errors(),
        ], 422);
    }
}