<?php

namespace App\Http\Controllers\Frontdesk;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Frontdesk\Concerns\ScopesToAccount;
use App\Models\EmployeePresence;
use App\Models\Organization;
use App\Models\Visit;
use App\Services\Frontdesk\OrganizationResolver;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use Illuminate\View\View;

class DashboardController extends Controller
{
    use ScopesToAccount;

    public function index(Request $request): View
    {
        $this->authorizeAbility($request, 'dashboard.view');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $visitQuery = Visit::owned($owner)->where('organization_id', $organization->id);
        $this->scopeToBranch($request, $visitQuery);

        $branchScope = app(OrganizationResolver::class)->branchScope($this->member($request));
        $cacheKey = "fd:dashboard:{$owner}:{$organization->id}:".($branchScope ?? 'all');

        $stats = Cache::remember($cacheKey, 60, function () use ($visitQuery) {
            $today = (clone $visitQuery)->where(function ($q) {
                $q->whereDate('checked_in_at', today())
                    ->orWhereDate('scheduled_at', today());
            });

            return [
                'visitors_today' => (clone $today)->count(),
                'currently_inside' => (clone $visitQuery)->currentlyInside()->count(),
                'expected_arrivals' => (clone $visitQuery)->whereIn('status', [
                    Visit::STATUS_EXPECTED,
                    Visit::STATUS_SCHEDULED,
                    Visit::STATUS_OVERDUE,
                ])->whereDate('scheduled_at', today())->count(),
                'waiting' => (clone $visitQuery)->where('status', Visit::STATUS_WAITING)->count(),
                'overdue' => (clone $visitQuery)->where('status', Visit::STATUS_OVERDUE)->count(),
                'checked_out_today' => (clone $visitQuery)->where('status', Visit::STATUS_CHECKED_OUT)
                    ->whereDate('checked_out_at', today())->count(),
                'deliveries_today' => (clone $visitQuery)->where('visitor_type', 'delivery')
                    ->whereDate('checked_in_at', today())->count(),
                'contractors_today' => (clone $visitQuery)->where('visitor_type', 'contractor')
                    ->whereDate('checked_in_at', today())->count(),
                'pending_approvals' => (clone $visitQuery)->where('status', Visit::STATUS_WAITING)
                    ->whereNull('checked_in_at')
                    ->where(function ($q) {
                        $q->whereJsonContains('contractor_details', ['_awaiting_approval' => true])
                            ->orWhereJsonContains('delivery_details', ['_awaiting_approval' => true]);
                    })->count(),
            ];
        });

        $stats = array_merge($stats, $this->staffPresenceStats($request, $owner, $organization));

        $currentVisitors = (clone $visitQuery)->currentlyInside()
            ->with(['visitor', 'host'])
            ->latest('checked_in_at')
            ->limit(10)
            ->get();

        $expectedVisitors = (clone $visitQuery)
            ->whereIn('status', [Visit::STATUS_EXPECTED, Visit::STATUS_SCHEDULED, Visit::STATUS_WAITING, Visit::STATUS_OVERDUE])
            ->whereDate('scheduled_at', today())
            ->with(['visitor', 'host'])
            ->orderBy('scheduled_at')
            ->limit(10)
            ->get();

        $pendingApprovals = (clone $visitQuery)
            ->where('status', Visit::STATUS_WAITING)
            ->whereNull('checked_in_at')
            ->where(function ($q) {
                $q->whereJsonContains('contractor_details', ['_awaiting_approval' => true])
                    ->orWhereJsonContains('delivery_details', ['_awaiting_approval' => true]);
            })
            ->with(['visitor', 'host'])
            ->latest()
            ->limit(10)
            ->get();

        $staffSteppedOut = EmployeePresence::query()
            ->where('status', EmployeePresence::STATUS_STEPPED_OUT)
            ->whereHas('employee', function ($q) use ($owner, $organization, $request) {
                $q->owned($owner)->where('organization_id', $organization->id)->where('active', true);
                $this->scopeToBranch($request, $q, 'branch_id');
            })
            ->with('employee')
            ->orderByDesc('last_event_at')
            ->limit(10)
            ->get();

        return view('frontdesk.dashboard', compact(
            'stats', 'currentVisitors', 'expectedVisitors', 'pendingApprovals', 'staffSteppedOut', 'organization',
        ));
    }

    /** @return array{staff_on_site: int, staff_stepped_out: int} */
    protected function staffPresenceStats(Request $request, string $owner, Organization $organization): array
    {
        $query = EmployeePresence::query()
            ->whereHas('employee', function ($q) use ($owner, $organization, $request) {
                $q->owned($owner)
                    ->where('organization_id', $organization->id)
                    ->where('active', true);
                $this->scopeToBranch($request, $q, 'branch_id');
            });

        return [
            'staff_on_site' => (clone $query)->where('status', EmployeePresence::STATUS_ON_SITE)->count(),
            'staff_stepped_out' => (clone $query)->where('status', EmployeePresence::STATUS_STEPPED_OUT)->count(),
        ];
    }
}