<?php

namespace App\Services\Analytics;

use App\Services\Analytics\Contracts\DataSet;
use App\Services\Analytics\DataSets\DepartmentStatisticsDataSet;
use App\Services\Analytics\DataSets\NurseJournalDataSet;
use App\Services\Analytics\DataSets\NurseShiftsDataSet;
use App\Services\Analytics\DataSets\PatientsDataSet;
use App\Services\Analytics\DataSets\ShiftsDataSet;
use App\Services\Analytics\DataSets\UnwantedEventsDataSet;
use InvalidArgumentException;

/**
 * Каталог источников данных конструктора отчётов.
 */
class DataSetRegistry
{
    /** @var array<string,DataSet> */
    private array $datasets;

    public function __construct()
    {
        $this->datasets = [];
        foreach ([new ShiftsDataSet, new PatientsDataSet, new UnwantedEventsDataSet, new NurseJournalDataSet, new NurseShiftsDataSet, new DepartmentStatisticsDataSet] as $dataset) {
            $this->datasets[$dataset->key()] = $dataset;
        }
    }

    /** @return array<string,DataSet> */
    public function all(): array
    {
        return $this->datasets;
    }

    public function has(string $key): bool
    {
        return isset($this->datasets[$key]);
    }

    public function get(string $key): DataSet
    {
        if (! isset($this->datasets[$key])) {
            throw new InvalidArgumentException("Неизвестный источник данных: {$key}");
        }

        return $this->datasets[$key];
    }

    /**
     * Метаданные всех датасетов для фронта (источники, измерения, показатели, фильтры).
     *
     * @return array<int,array<string,mixed>>
     */
    public function metadata(): array
    {
        return array_values(array_map(fn (DataSet $d) => [
            'key' => $d->key(),
            'label' => $d->label(),
            'description' => $d->description(),
            'category' => $d->category(),
            'fixed' => $d->fixed(),
            'dimensions' => array_map(fn (Dimension $dim) => [
                'key' => $dim->key,
                'label' => $dim->label,
                'type' => $dim->type,
            ], $d->dimensions()),
            'measures' => array_map(fn (Measure $m) => [
                'key' => $m->key,
                'label' => $m->label,
                'unit' => $m->unit,
            ], $d->measures()),
            'filters' => array_map(fn (FilterDef $f) => [
                'key' => $f->key,
                'label' => $f->label,
                'type' => $f->type,
                'optionsSource' => $f->optionsSource,
                'options' => $f->options === null ? null : collect($f->options)
                    ->map(fn ($label, $value) => ['label' => $label, 'value' => $value])
                    ->values()
                    ->all(),
            ], $d->filters()),
        ], $this->datasets));
    }
}