<?php

namespace App\Http\Requests\Parametrizacao\KitExame;

use App\Http\Requests\FormRequest;
use App\Models\Parametrizacao\Exame\Exame;
use App\Models\Parametrizacao\KitExame\KitExame;

class ItemRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        switch ($this->method()) {

            case 'POST': {

                return $this->getPostRules();
            }
            case 'PUT': {

                return $this->getPutRules();
            }
            default: {

                return [];
            }
        }
    }

    private function getPostRules()
    {
        return [
            'nome' => [
                'required',
                'unique:\App\Models\Parametrizacao\KitExame\KitExame,nome,NULL,id,deleted_at,NULL',
            ],
            'tipo_id' => [
                'required',
                'integer',
            ],
            'itens' => [
                'bail',
                'required',
                'array',
                function ($attribute, $value, $fail) {

                    foreach ($value as $item) {

                        if (Exame::findOrFail($item['exame_id'])->tipo_id != $this->tipo_id) {

                            $fail("Os exames devem ser do mesmo tipo do kit.");
                        }
                    }
                },
                function ($attribute, $value, $fail) {

                    $this->validateDuplicatedKitItems($attribute, $value, $fail);
                },
            ],
            'itens.*.exame_id' => [
                'required',
                'integer',
                'distinct',
            ],
        ];
    }

    private function getPutRules()
    {
        return [
            'nome' => [
                'required',
                "unique:\App\Models\Parametrizacao\KitExame\KitExame,nome,{$this->kit},id,deleted_at,NULL",
            ],
            'itens' => [
                'bail',
                'required',
                'array',
                function ($attribute, $value, $fail) {

                    $this->validateDuplicatedKitItems($attribute, $value, $fail);
                }
            ],
            'itens.*.exame_id' => [
                'required',
                'integer',
                'distinct',
            ]
        ];
    }

    private function validateDuplicatedKitItems($attribute, $value, $fail)
    {
        $exames = collect($value)->pluck('exame_id');
        $examesCount = $exames->count();

        foreach (KitExame::where('id', '<>', $this->kit)->get() as $kit) {

            $currentExames = $kit->itens->pluck('exame_id');

            if ($currentExames->count() != $examesCount) {

                continue;
            }

            if ($currentExames->diff($exames)->isEmpty()) {

                $fail("O kit {$kit->nome} já possui estes mesmos exames cadastrados. Utilize ou atualize ele.");

                break;
            }
        }
    }

    public function messages()
    {
        return [
            'nome.unique' => 'Já existe um kit com este nome cadastrado.'
        ];
    }
}