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<?php

declare(strict_types=1);

namespace Mautic\MarketplaceBundle\Collection;

use Mautic\MarketplaceBundle\DTO\Version;
use Mautic\MarketplaceBundle\Exception\RecordNotFoundException;

class VersionCollection implements \Iterator, \Countable, \ArrayAccess
{
    /**
     * @var Version[]
     */
    private array $records;

    private int $position = 0;

    /**
     * @param Version[] $records
     */
    public function __construct(array $records = [])
    {
        $this->records = array_values($records);
    }

    public static function fromArray(array $array): VersionCollection
    {
        return new self(
            array_map(
                fn (array $record) => Version::fromArray($record),
                $array
            )
        );
    }

    public function map(callable $callback): VersionCollection
    {
        return new self(array_map($callback, $this->records));
    }

    public function sortByLatest(): VersionCollection
    {
        $records = $this->records;

        usort(
            $records,
            fn (Version $versionA, Version $versionB) => $versionB->time->getTimestamp() - $versionA->time->getTimestamp()
        );

        return new self($records);
    }

    public function filter(callable $callback): VersionCollection
    {
        return new self(array_values(array_filter($this->records, $callback)));
    }

    /**
     * Finds the latest stable version. If no stable version is found, returns the version with latest timestamp.
     */
    public function findLatestStableVersionPackage(): ?Version
    {
        return $this->sortByLatest()->filter(fn (Version $version) => $version->isStable())->first();
    }

    /**
     * Finds the latest stable version. If no stable version is found, returns the version with latest timestamp.
     */
    public function findLatestVersionPackage(): ?Version
    {
        return $this->sortByLatest()->first();
    }

    public function current(): Version
    {
        return $this->records[$this->position];
    }

    public function first(): ?Version
    {
        return $this->records[0] ?? null;
    }

    public function next(): void
    {
        ++$this->position;
    }

    public function key(): mixed
    {
        return $this->position;
    }

    public function valid(): bool
    {
        return isset($this->records[$this->position]);
    }

    public function rewind(): void
    {
        $this->position = 0;
    }

    public function count(): int
    {
        return count($this->records);
    }

    public function offsetSet($offset, $value): void
    {
        if (is_null($offset)) {
            $this->records[] = $value;
        } else {
            $this->records[$offset] = $value;
        }
    }

    public function offsetExists($offset): bool
    {
        return isset($this->records[$offset]);
    }

    public function offsetUnset($offset): void
    {
        unset($this->records[$offset]);
    }

    public function offsetGet($offset): Version
    {
        if (isset($this->records[$offset])) {
            return $this->records[$offset];
        }

        throw new RecordNotFoundException("Version on offset {$offset} was not found");
    }
}