<?php

namespace App\Http\Controllers\Admin;

use App\Enums\PressReleaseStatus;
use App\Http\Controllers\Controller;
use App\Models\Company;
use App\Models\Contact;
use App\Models\NewsletterSubscription;
use App\Models\PressRelease;
use App\Models\User;
use App\Services\Admin\AdminPerformanceCache;
use Illuminate\Contracts\View\View;
use stdClass;

class DashboardController extends Controller
{
    public function __invoke(): View
    {
        $stats = app(AdminPerformanceCache::class)->remember(AdminPerformanceCache::DashboardStats, AdminPerformanceCache::StatsTtl, fn (): array => $this->stats());

        return view('admin.dashboard', [
            'stats' => $stats,
            'recentPRs' => PressRelease::withoutGlobalScopes()
                ->with(['company:id,name', 'user:id,name'])
                ->latest('created_at')
                ->limit(8)
                ->get(['id', 'title', 'status', 'portal', 'company_id', 'user_id', 'created_at']),
            'pendingReviews' => PressRelease::withoutGlobalScopes()
                ->with(['company:id,name'])
                ->where('status', PressReleaseStatus::Review->value)
                ->latest('created_at')
                ->limit(5)
                ->get(['id', 'title', 'company_id', 'portal', 'created_at']),
        ]);
    }

    /**
     * @return array{press_releases: array{total: int, published: int, review: int, draft: int}, companies: int, contacts: int, users: int, newsletter: int}
     */
    private function stats(): array
    {
        $pressReleaseStats = PressRelease::withoutGlobalScopes()
            ->toBase()
            ->selectRaw('COUNT(*) as total')
            ->selectRaw('SUM(CASE WHEN status = ? THEN 1 ELSE 0 END) as published', [PressReleaseStatus::Published->value])
            ->selectRaw('SUM(CASE WHEN status = ? THEN 1 ELSE 0 END) as review', [PressReleaseStatus::Review->value])
            ->selectRaw('SUM(CASE WHEN status = ? THEN 1 ELSE 0 END) as draft', [PressReleaseStatus::Draft->value])
            ->first();

        return [
            'press_releases' => $this->normalizePressReleaseStats($pressReleaseStats),
            'companies' => Company::withoutGlobalScopes()->count(),
            'contacts' => Contact::withoutGlobalScopes()->count(),
            'users' => User::query()->toBase()->count('*'),
            'newsletter' => NewsletterSubscription::withoutGlobalScopes()
                ->where('is_confirmed', true)
                ->count(),
        ];
    }

    /**
     * @return array{total: int, published: int, review: int, draft: int}
     */
    private function normalizePressReleaseStats(?stdClass $stats): array
    {
        return [
            'total' => (int) ($stats->total ?? 0),
            'published' => (int) ($stats->published ?? 0),
            'review' => (int) ($stats->review ?? 0),
            'draft' => (int) ($stats->draft ?? 0),
        ];
    }
}