<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Api\Concerns\ScopesApiToAccount;
use App\Http\Controllers\Controller;
use App\Models\Counter;
use App\Models\ServiceQueue;
use App\Models\Ticket;
use App\Services\Qms\QueueEngine;
use App\Services\Qms\TicketPresenter;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ConsoleApiController extends Controller
{
    use ScopesApiToAccount;

    public function __construct(
        protected QueueEngine $engine,
    ) {}

    public function show(Request $request, Counter $counter): JsonResponse
    {
        $this->authorizeAbility($request, 'console.use');
        $this->authorizeOwner($request, $counter);
        $owner = $this->ownerRef($request);

        $counter->load(['serviceQueues', 'branch']);

        $currentTicket = Ticket::owned($owner)
            ->where('counter_id', $counter->id)
            ->whereIn('status', ['called', 'serving', 'on_hold'])
            ->with('serviceQueue')
            ->latest('called_at')
            ->first();

        $waitingByQueue = collect($counter->serviceQueues)->mapWithKeys(function (ServiceQueue $queue) {
            return [$queue->uuid => array_map(
                fn ($t) => TicketPresenter::toArray($t),
                $this->engine->waitingTickets($queue, 10),
            )];
        });

        $allQueues = ServiceQueue::owned($owner)
            ->where('organization_id', $counter->organization_id)
            ->where('branch_id', $counter->branch_id)
            ->where('is_active', true)
            ->orderBy('name')
            ->get(['uuid', 'name', 'prefix']);

        return response()->json([
            'data' => [
                'counter' => [
                    'uuid' => $counter->uuid,
                    'name' => $counter->name,
                    'status' => $counter->status,
                    'branch' => $counter->branch?->name,
                ],
                'current_ticket' => $currentTicket ? TicketPresenter::toArray($currentTicket) : null,
                'queues' => $counter->serviceQueues->map(fn (ServiceQueue $q) => [
                    'uuid' => $q->uuid,
                    'name' => $q->name,
                    'prefix' => $q->prefix,
                ]),
                'waiting_by_queue' => $waitingByQueue,
                'transfer_queues' => $allQueues,
            ],
        ]);
    }

    public function action(Request $request, Counter $counter): JsonResponse
    {
        $this->authorizeAbility($request, 'console.use');
        $this->authorizeOwner($request, $counter);
        $actor = $this->ownerRef($request);

        $validated = $request->validate([
            'action' => ['required', 'string'],
            'queue_uuid' => ['nullable', 'uuid'],
            'ticket_uuid' => ['nullable', 'uuid'],
            'to_queue_uuid' => ['nullable', 'uuid'],
            'reason' => ['nullable', 'string', 'max:500'],
        ]);

        $result = match ($validated['action']) {
            'call_next' => $this->handleCallNext($counter, $validated['queue_uuid'] ?? '', $actor),
            'available' => tap($counter)->update(['status' => 'available']),
            'offline' => tap($counter)->update(['status' => 'offline']),
            default => $this->handleTicketAction($validated, $counter, $actor),
        };

        if ($result instanceof Ticket) {
            return response()->json(['data' => TicketPresenter::toArray($result->load(['serviceQueue', 'counter']))]);
        }

        return $this->show($request, $counter->fresh());
    }

    protected function handleCallNext(Counter $counter, string $queueUuid, string $actor): ?Ticket
    {
        abort_if($queueUuid === '', 422, 'queue_uuid is required.');
        $queue = ServiceQueue::where('uuid', $queueUuid)->firstOrFail();

        return $this->engine->callNext($queue, $counter, $actor);
    }

    protected function handleTicketAction(array $validated, Counter $counter, string $actor): Ticket|Counter|null
    {
        $ticketUuid = $validated['ticket_uuid'] ?? '';
        abort_if($ticketUuid === '', 422, 'ticket_uuid is required for this action.');

        $ticket = Ticket::where('uuid', $ticketUuid)->firstOrFail();

        return match ($validated['action']) {
            'recall' => $this->engine->recall($ticket, $actor),
            'start' => $this->engine->startServing($ticket, $actor),
            'hold' => $this->engine->hold($ticket, $actor),
            'skip' => $this->engine->skip($ticket, $actor),
            'complete' => $this->engine->completeTicket($ticket, $actor),
            'no_show' => $this->engine->markNoShow($ticket, $actor),
            'transfer' => $this->handleTransfer(
                $ticket,
                $counter,
                $validated['to_queue_uuid'] ?? '',
                $validated['reason'] ?? null,
                $actor,
            ),
            default => abort(422, 'Unknown action.'),
        };
    }

    protected function handleTransfer(
        Ticket $ticket,
        Counter $counter,
        string $toQueueUuid,
        ?string $reason,
        string $actor,
    ): Ticket {
        abort_if($toQueueUuid === '', 422, 'to_queue_uuid is required for transfer.');

        $toQueue = ServiceQueue::where('uuid', $toQueueUuid)->firstOrFail();

        return $this->engine->transfer($ticket, $toQueue, $counter, $reason, $actor);
    }
}