<?php

namespace App\Http\Controllers\Care;

use App\Http\Controllers\Care\Concerns\ScopesToAccount;
use App\Http\Controllers\Controller;
use App\Models\Appointment;
use App\Models\Branch;
use App\Models\Practitioner;
use App\Services\Care\AppointmentService;
use App\Services\Care\CarePermissions;
use App\Services\Care\CareQueueBridge;
use App\Services\Care\CareQueueContexts;
use App\Services\Care\ConsultationService;
use App\Services\Care\OrganizationResolver;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class QueueController extends Controller
{
    use ScopesToAccount;

    public function __construct(
        protected AppointmentService $appointments,
        protected ConsultationService $consultations,
        protected CareQueueBridge $queueBridge,
    ) {}

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

        $branches = Branch::owned($this->ownerRef($request))
            ->where('organization_id', $organization->id)
            ->where('is_active', true)
            ->when($branchScope, fn ($q) => $q->where('id', $branchScope))
            ->orderBy('name')
            ->get();

        $branchId = (int) ($request->input('branch_id') ?: $branchScope ?: $branches->first()?->id);
        $practitionerId = $request->input('practitioner_id') ? (int) $request->input('practitioner_id') : null;

        $queueIntegration = ['enabled' => false];
        if ($branchId && $this->queueBridge->isEnabled($organization)) {
            // Catch up tickets for waiters created before Queue was linked (demo / pre-enable).
            $this->queueBridge->syncMissingTickets($organization, CareQueueContexts::CONSULTATION, $branchId, 50);
            $queueIntegration = $this->queueBridge->listMeta($organization, CareQueueContexts::CONSULTATION, $branchId);
        }

        $queue = $branchId
            ? $this->appointments->queue($this->ownerRef($request), $branchId, $practitionerId)
            : collect();

        $inConsultation = Appointment::owned($this->ownerRef($request))
            ->where('organization_id', $organization->id)
            ->where('status', Appointment::STATUS_IN_CONSULTATION)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->when($practitionerId, fn ($q) => $q->where('practitioner_id', $practitionerId))
            ->with(['patient', 'practitioner', 'consultation'])
            ->orderBy('started_at')
            ->get();

        $canManageQueue = app(CarePermissions::class)
            ->can($this->member($request), 'queue.manage');
        $canConsult = app(CarePermissions::class)
            ->can($this->member($request), 'consultations.manage');

        $heroStats = [
            'waiting' => $queue->count(),
            'in_consultation' => $inConsultation->count(),
            'today' => Appointment::owned($this->ownerRef($request))
                ->where('organization_id', $organization->id)
                ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
                ->whereDate('scheduled_at', today())
                ->count(),
        ];

        return view('care.queue.index', [
            'organization' => $organization,
            'branches' => $branches,
            'branchId' => $branchId,
            'practitioners' => Practitioner::owned($this->ownerRef($request))
                ->where('organization_id', $organization->id)
                ->where('is_active', true)
                ->orderBy('name')
                ->get(),
            'practitionerId' => $practitionerId,
            'queue' => $queue,
            'inConsultation' => $inConsultation,
            'canManageQueue' => $canManageQueue,
            'canConsult' => $canConsult,
            'heroStats' => $heroStats,
            'queueIntegration' => $queueIntegration,
        ]);
    }

    public function callNext(Request $request): RedirectResponse
    {
        $this->authorizeAbility($request, 'appointments.view');
        $organization = $this->organization($request);
        abort_unless($this->queueBridge->isEnabled($organization), 404);

        $member = $this->member($request);
        $branchScope = app(OrganizationResolver::class)->branchScope($member);
        $branchId = (int) ($request->input('branch_id') ?: $branchScope);
        abort_unless($branchId > 0, 422);

        $result = $this->queueBridge->callNext(
            $organization,
            CareQueueContexts::CONSULTATION,
            $branchId,
            $member,
            $request->input('practitioner_id') ? (int) $request->input('practitioner_id') : null,
        );
        $ticket = $result['ticket'] ?? null;
        if (! $ticket) {
            return back()->with('info', 'No patients waiting at your consultation service point.');
        }

        return back()->with('success', 'Called '.$ticket['ticket_number'].' — '.($ticket['customer_name'] ?? 'patient').'.');
    }

    public function completeTicket(Request $request, Appointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'consultations.manage');
        $this->authorizeAppointment($request, $appointment);
        $organization = $this->organization($request);
        abort_unless($this->queueBridge->isEnabled($organization), 404);

        $ticket = $this->queueBridge->complete($organization, $appointment);
        if (! $ticket) {
            return back()->with('error', 'Could not complete queue ticket.');
        }

        return back()->with('success', 'Completed '.$ticket['ticket_number'].'.');
    }

    public function recall(Request $request, Appointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'consultations.manage');
        $this->authorizeAppointment($request, $appointment);
        $organization = $this->organization($request);
        abort_unless($this->queueBridge->isEnabled($organization), 404);

        $ticket = $this->queueBridge->recall($organization, $appointment);
        if (! $ticket) {
            return back()->with('error', 'Could not call patient again.');
        }

        return back()->with('success', 'Called again '.$ticket['ticket_number'].'.');
    }

    public function start(Request $request, Appointment $appointment): RedirectResponse
    {
        $this->authorizeAbility($request, 'consultations.manage');
        $this->authorizeAppointment($request, $appointment);

        $practitionerId = $request->input('practitioner_id')
            ? (int) $request->input('practitioner_id')
            : $appointment->practitioner_id;

        try {
            $this->appointments->startConsultation(
                $appointment,
                $this->ownerRef($request),
                $practitionerId,
                $this->ownerRef($request),
            );
        } catch (\InvalidArgumentException $e) {
            return back()->with('error', $e->getMessage());
        }

        $consultation = $this->consultations->startFromAppointment(
            $appointment->fresh(),
            $this->ownerRef($request),
            $this->ownerRef($request),
        );

        return redirect()->route('care.consultations.show', $consultation)
            ->with('success', 'Consultation started.');
    }

    protected function authorizeAppointment(Request $request, Appointment $appointment): void
    {
        $this->authorizeOwner($request, $appointment);
        abort_unless($appointment->organization_id === $this->organization($request)->id, 404);

        $branchId = app(OrganizationResolver::class)->branchScope($this->member($request));
        if ($branchId !== null && $appointment->branch_id !== $branchId) {
            abort(404);
        }
    }
}