<?php

declare(strict_types=1);

namespace Magdev\WcLicensedProductClient\Dto;

/**
 * Represents update information returned by the update-check endpoint.
 */
final readonly class UpdateInfo
{
    /**
     * @param bool $updateAvailable Whether an update is available
     * @param string|null $version Latest available version
     * @param string|null $slug Plugin slug for WordPress
     * @param string|null $plugin Plugin basename (slug/slug.php)
     * @param string|null $downloadUrl Secure download URL for the update package
     * @param \DateTimeImmutable|null $lastUpdated Date of the latest release
     * @param string|null $tested Highest WordPress version tested with
     * @param string|null $requires Minimum required WordPress version
     * @param string|null $requiresPhp Minimum required PHP version
     * @param string|null $changelog Release notes/changelog for the update
     * @param string|null $packageHash SHA256 hash of the package for integrity verification
     * @param string|null $name Product name
     * @param string|null $homepage Product homepage URL
     * @param array<string, string>|null $icons Plugin icons for WordPress admin
     * @param array<string, string>|null $sections Content sections for plugin info modal
     */
    public function __construct(
        public bool $updateAvailable,
        public ?string $version = null,
        public ?string $slug = null,
        public ?string $plugin = null,
        public ?string $downloadUrl = null,
        public ?\DateTimeImmutable $lastUpdated = null,
        public ?string $tested = null,
        public ?string $requires = null,
        public ?string $requiresPhp = null,
        public ?string $changelog = null,
        public ?string $packageHash = null,
        public ?string $name = null,
        public ?string $homepage = null,
        public ?array $icons = null,
        public ?array $sections = null,
    ) {
    }

    public static function fromArray(array $data): self
    {
        if (!isset($data['update_available']) || !is_bool($data['update_available'])) {
            throw new \InvalidArgumentException('Invalid response: missing or invalid update_available');
        }

        $lastUpdated = null;
        if (isset($data['last_updated']) && $data['last_updated'] !== null) {
            try {
                $lastUpdated = new \DateTimeImmutable($data['last_updated']);
            } catch (\Exception $e) {
                throw new \InvalidArgumentException(
                    'Invalid response: invalid date format for last_updated',
                    0,
                    $e
                );
            }
        }

        $icons = null;
        if (isset($data['icons']) && is_array($data['icons'])) {
            $icons = $data['icons'];
        }

        $sections = null;
        if (isset($data['sections']) && is_array($data['sections'])) {
            $sections = $data['sections'];
        }

        return new self(
            updateAvailable: $data['update_available'],
            version: isset($data['version']) && is_string($data['version']) ? $data['version'] : null,
            slug: isset($data['slug']) && is_string($data['slug']) ? $data['slug'] : null,
            plugin: isset($data['plugin']) && is_string($data['plugin']) ? $data['plugin'] : null,
            downloadUrl: isset($data['download_url']) && is_string($data['download_url']) ? $data['download_url'] : (
                isset($data['package']) && is_string($data['package']) ? $data['package'] : null
            ),
            lastUpdated: $lastUpdated,
            tested: isset($data['tested']) && is_string($data['tested']) ? $data['tested'] : null,
            requires: isset($data['requires']) && is_string($data['requires']) ? $data['requires'] : null,
            requiresPhp: isset($data['requires_php']) && is_string($data['requires_php']) ? $data['requires_php'] : null,
            changelog: isset($data['changelog']) && is_string($data['changelog']) ? $data['changelog'] : null,
            packageHash: isset($data['package_hash']) && is_string($data['package_hash']) ? $data['package_hash'] : null,
            name: isset($data['name']) && is_string($data['name']) ? $data['name'] : null,
            homepage: isset($data['homepage']) && is_string($data['homepage']) ? $data['homepage'] : null,
            icons: $icons,
            sections: $sections,
        );
    }

    /**
     * Check if the package hash is valid against the expected format.
     */
    public function hasValidPackageHash(): bool
    {
        if ($this->packageHash === null) {
            return false;
        }

        // Package hash format: "sha256:hexstring"
        return preg_match('/^sha256:[a-f0-9]{64}$/i', $this->packageHash) === 1;
    }
}