<?php

namespace App\Http\Resources;

use App\Support\EntityResolver;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Http\Resources\MissingValue;
use Illuminate\Support\Facades\Gate;

class TaskResource extends JsonResource
{
    public static $wrap = null;

    public function toArray(Request $request): array
    {
        $entity = $this->whenLoaded('taskable');
        $taskable = $entity && ! $entity instanceof MissingValue
            ? [
                'type' => EntityResolver::typeOf($entity),
                'id' => $entity->getKey(),
                'label' => $this->entityLabel($entity),
            ]
            : null;

        $gate = Gate::forUser($request->user());

        return [
            'id' => $this->id,
            'subject' => $this->subject,
            'description' => $this->description,
            'taskable_type' => $taskable['type'] ?? null,
            'taskable_id' => $taskable['id'] ?? $this->taskable_id,
            'taskable' => $taskable,
            'assigned_to' => $this->assigned_to,
            'assignee' => $this->whenLoaded('assignee', fn () => $this->assignee?->only(['id', 'name', 'avatar', 'avatar_url'])),
            'assigned_by' => $this->assigned_by,
            'assigner' => $this->whenLoaded('assigner', fn () => $this->assigner?->only(['id', 'name'])),
            'created_by' => $this->created_by,
            'creator' => $this->whenLoaded('creator', fn () => $this->creator?->only(['id', 'name'])),
            'priority' => $this->priority->value,
            'status' => $this->status->value,
            'due_at' => $this->due_at?->toISOString(),
            'started_at' => $this->started_at?->toISOString(),
            'completed_at' => $this->completed_at?->toISOString(),
            'reminder_at' => $this->reminder_at?->toISOString(),
            'parent_task_id' => $this->parent_task_id,
            'parent' => $this->whenLoaded('parent', fn () => $this->parent?->only(['id', 'subject'])),
            'estimated_minutes' => $this->estimated_minutes,
            'visibility' => $this->visibility->value,
            'version' => $this->version,
            'is_overdue' => $this->is_overdue,
            'capabilities' => [
                'update' => $gate->allows('update', $this->resource),
                'assign' => $gate->allows('assign', [$this->resource, $this->assigned_to]),
                'transition' => $gate->allows('transition', $this->resource),
                'delete' => $gate->allows('delete', $this->resource),
            ],
            'created_at' => $this->created_at?->toISOString(),
            'updated_at' => $this->updated_at?->toISOString(),
        ];
    }

    private function entityLabel(object $entity): string
    {
        return (string) ($entity->name
            ?? $entity->title
            ?? $entity->company
            ?? trim(($entity->first_name ?? '').' '.($entity->last_name ?? ''))
            ?: class_basename($entity).' #'.$entity->getKey());
    }
}