<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class StorePlatformChannelRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    /**
     * @return array<string, array<int, mixed>|string>
     */
    public function rules(): array
    {
        return [
            'platform_instance_id' => 'required|exists:platform_instances,id',
            // name doubles as the Lemmy community slug (CreateChannelAction copies it
            // verbatim into channel_id for community lookup at publish time), so it must
            // be slug format and unique per instance — matching the Livewire create form.
            'name' => [
                'required',
                'string',
                'max:255',
                'regex:/^[a-z0-9_]+$/',
                Rule::unique('platform_channels', 'name')
                    ->where('platform_instance_id', $this->input('platform_instance_id')),
            ],
            'language_id' => 'nullable|exists:languages,id',
            'description' => 'nullable|string',
        ];
    }

    /**
     * @return array<string, string>
     */
    public function messages(): array
    {
        return [
            'name.regex' => 'The name must be a valid community slug (lowercase letters, numbers, and underscores only).',
            'name.unique' => 'A channel with this name already exists for this instance.',
        ];
    }
}