<?php

declare(strict_types=1);

namespace OpenAI\Responses\Embeddings;

use OpenAI\Contracts\ResponseContract;
use OpenAI\Contracts\ResponseHasMetaInformationContract;
use OpenAI\Responses\Concerns\ArrayAccessible;
use OpenAI\Responses\Concerns\HasMetaInformation;
use OpenAI\Responses\Meta\MetaInformation;
use OpenAI\Testing\Responses\Concerns\Fakeable;

/**
 * @implements ResponseContract<array{object: string, model?: string|null, data: array<int, array{object: string, embedding: array<int, float>, index?: int}>, usage?: array{prompt_tokens: int, total_tokens: int}}>
 */
final class CreateResponse implements ResponseContract, ResponseHasMetaInformationContract
{
    /**
     * @use ArrayAccessible<array{object: string, model?: string|null, data: array<int, array{object: string, embedding: array<int, float>, index?: int}>, usage?: array{prompt_tokens: int, total_tokens: int}}>
     */
    use ArrayAccessible;

    use Fakeable;
    use HasMetaInformation;

    /**
     * @param  array<int, CreateResponseEmbedding>  $embeddings
     */
    private function __construct(
        public readonly string $object,
        public readonly ?string $model,
        public readonly array $embeddings,
        public readonly ?CreateResponseUsage $usage,
        private readonly MetaInformation $meta,
    ) {}

    /**
     * Acts as static factory, and returns a new Response instance.
     *
     * @param  array{object: string, model?: string|null, data: array<int, array{object: string, embedding: array<int, float>, index?: int}>, usage?: array{prompt_tokens: int, total_tokens: int}}  $attributes
     */
    public static function from(array $attributes, MetaInformation $meta): self
    {
        $embeddings = array_map(fn (array $result): CreateResponseEmbedding => CreateResponseEmbedding::from(
            $result
        ), $attributes['data']);

        return new self(
            $attributes['object'],
            $attributes['model'] ?? null,
            $embeddings,
            isset($attributes['usage']) ? CreateResponseUsage::from($attributes['usage']) : null,
            $meta,
        );
    }

    /**
     * {@inheritDoc}
     */
    public function toArray(): array
    {
        return array_filter([
            'object' => $this->object,
            'model' => $this->model ?? null,
            'data' => array_map(
                static fn (CreateResponseEmbedding $result): array => $result->toArray(),
                $this->embeddings,
            ),
            'usage' => $this->usage?->toArray(),
        ], fn (mixed $value): bool => ! is_null($value));
    }
}