<?php

declare(strict_types=1);

namespace App\Http\Controllers\Api\Admin\MailCampaign\Concerns;

use App\Models\Customer;
use App\Models\MailCampaign;
use App\Models\Service;
use App\Support\RenewalCampaign;
use App\Support\RenewalQuote;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;

trait HandlesRenewalCampaigns
{
    public function renewalServices(Request $request): JsonResponse
    {
        $data = $request->validate([
            'uuids' => 'required|array|min:1|max:200',
            'uuids.*' => 'string|exists:customers,uuid',
            'days' => 'nullable|integer|min:1|max:365',
        ]);

        $customerIds = Customer::whereIn('uuid', $data['uuids'])->pluck('id')->all();
        $today = now()->startOfDay();

        $rows = RenewalQuote::dueServices($customerIds, (int) ($data['days'] ?? 30))
            ->map(function (Service $service) use ($today) {
                $quote = RenewalQuote::forService($service);

                return $quote ? [
                    ...$quote,
                    'customer_uuid' => $service->customer->uuid,
                    'customer_name' => $service->customer->fullname,
                    'customer_email' => $service->customer->email,
                    'days_left' => (int) $today->diffInDays($service->expires_at->copy()->startOfDay(), false),
                ] : null;
            })
            ->filter()
            ->values();

        return response()->json(['error' => false, 'data' => $rows]);
    }

    /**
     * @param array<int, array{service_id: int, months: int}> $selected
     * @return array<int, array{customer_id: int, email: string, service_id: int}>
     */
    private function renewalJobs(MailCampaign $campaign, array $selected): array
    {
        if (! RenewalCampaign::isRenewalTemplate($campaign)) {
            throw ValidationException::withMessages(['renewal_services' => 'Template đã chọn không phải mẫu nhắc gia hạn.']);
        }

        $services = Service::with('customer:id,email')
            ->whereIn('id', array_column($selected, 'service_id'))
            ->get();

        return $services
            ->filter(fn (Service $service) => $service->customer && trim((string) $service->customer->email) !== '')
            ->map(fn (Service $service) => [
                'customer_id' => $service->customer->id,
                'email' => trim($service->customer->email),
                'service_id' => $service->id,
            ])
            ->values()
            ->all();
    }
}