<?php

namespace App\Http\Controllers\Qms;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Qms\Concerns\ScopesToAccount;
use App\Models\Branch;
use App\Models\QueueAppointment;
use App\Models\ServiceQueue;
use App\Services\Qms\AppointmentService;
use App\Services\Qms\AuditLogger;
use App\Services\Qms\OrganizationResolver;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\View\View;

class AppointmentController extends Controller
{
    use ScopesToAccount;

    public function __construct(
        protected AppointmentService $appointments,
    ) {}

    public function index(Request $request): View
    {
        $this->authorizeAbility($request, 'appointments.view');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);
        $branchScope = app(OrganizationResolver::class)->branchScope($this->member($request));

        $appointments = QueueAppointment::owned($owner)
            ->where('organization_id', $organization->id)
            ->when($branchScope, fn ($q) => $q->where('branch_id', $branchScope))
            ->when($request->query('status'), fn ($q, $s) => $q->where('status', $s))
            ->with(['serviceQueue', 'branch', 'ticket'])
            ->orderBy('scheduled_at')
            ->paginate(30);

        $appointmentQuery = QueueAppointment::owned($owner)
            ->where('organization_id', $organization->id)
            ->when($branchScope, fn ($q) => $q->where('branch_id', $branchScope));

        $heroStats = [
            'today' => (clone $appointmentQuery)->whereDate('scheduled_at', today())->count(),
            'scheduled' => (clone $appointmentQuery)->where('status', 'scheduled')->count(),
            'checked_in' => (clone $appointmentQuery)->where('status', 'checked_in')->count(),
        ];

        return view('qms.appointments.index', compact('appointments', 'organization', 'heroStats'));
    }

    public function create(Request $request): View
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $branches = Branch::owned($owner)->where('organization_id', $organization->id)->where('is_active', true)->orderBy('name')->get();
        $queues = ServiceQueue::owned($owner)->where('organization_id', $organization->id)->where('is_active', true)->orderBy('name')->get();

        return view('qms.appointments.create', [
            'organization' => $organization,
            'branches' => $branches,
            'queues' => $queues,
            'modes' => config('qms.appointment_modes'),
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        $validated = $request->validate([
            'branch_id' => ['required', 'exists:queue_branches,id'],
            'service_queue_id' => ['nullable', 'exists:queue_service_queues,id'],
            'customer_name' => ['required', 'string', 'max:255'],
            'customer_phone' => ['nullable', 'string', 'max:50'],
            'customer_email' => ['nullable', 'email', 'max:255'],
            'scheduled_at' => ['required', 'date'],
            'mode' => ['nullable', 'string', 'in:'.implode(',', array_keys(config('qms.appointment_modes')))],
        ]);

        $appointment = QueueAppointment::create([
            'owner_ref' => $owner,
            'organization_id' => $organization->id,
            ...$validated,
            'mode' => $validated['mode'] ?? $organization->settings['appointment_mode'] ?? 'hybrid',
            'status' => 'scheduled',
            'reference' => 'APT-'.Str::upper(Str::random(6)),
        ]);

        AuditLogger::record($owner, 'appointment.created', $organization->id, $owner, QueueAppointment::class, $appointment->id);

        return redirect()->route('qms.appointments.index')->with('success', 'Appointment scheduled.');
    }

    public function edit(Request $request, QueueAppointment $appointment): View
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $this->authorizeOwner($request, $appointment);
        $owner = $this->ownerRef($request);
        $organization = $this->organization($request);

        return view('qms.appointments.edit', [
            'appointment' => $appointment,
            'branches' => Branch::owned($owner)->where('organization_id', $organization->id)->orderBy('name')->get(),
            'queues' => ServiceQueue::owned($owner)->where('organization_id', $organization->id)->orderBy('name')->get(),
            'modes' => config('qms.appointment_modes'),
        ]);
    }

    public function update(Request $request, QueueAppointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $this->authorizeOwner($request, $appointment);
        abort_unless($appointment->status === 'scheduled', 422, 'Only scheduled appointments can be edited.');

        $validated = $request->validate([
            'branch_id' => ['required', 'exists:queue_branches,id'],
            'service_queue_id' => ['nullable', 'exists:queue_service_queues,id'],
            'customer_name' => ['required', 'string', 'max:255'],
            'customer_phone' => ['nullable', 'string', 'max:50'],
            'customer_email' => ['nullable', 'email', 'max:255'],
            'scheduled_at' => ['required', 'date'],
            'mode' => ['nullable', 'string', 'in:'.implode(',', array_keys(config('qms.appointment_modes')))],
        ]);

        $appointment->update($validated);
        AuditLogger::record($this->ownerRef($request), 'appointment.created', $appointment->organization_id, $this->ownerRef($request), QueueAppointment::class, $appointment->id, ['updated' => true]);

        return redirect()->route('qms.appointments.index')->with('success', 'Appointment updated.');
    }

    public function checkIn(Request $request, QueueAppointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $this->authorizeOwner($request, $appointment);

        $ticket = $this->appointments->checkIn($appointment, $this->ownerRef($request));

        return redirect()->route('qms.tickets.show', $ticket)->with('success', 'Appointment checked in. Ticket issued.');
    }

    public function cancel(Request $request, QueueAppointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'appointments.manage');
        $this->authorizeOwner($request, $appointment);

        $appointment->update(['status' => 'cancelled']);
        AuditLogger::record($this->ownerRef($request), 'appointment.cancelled', $appointment->organization_id, $this->ownerRef($request), QueueAppointment::class, $appointment->id);

        return back()->with('success', 'Appointment cancelled.');
    }
}