<?php

namespace Alexr\Whatsapp\DTO;

/**
 * Class NormalizedTemplate
 *
 * Represents a normalized WhatsApp template from any provider.
 *
 * @package Alexr\Whatsapp\DTO
 */
class NormalizedTemplate
{
	// Template types
	public const TYPE_TEXT = 'text';
	public const TYPE_MEDIA = 'media';
	public const TYPE_QUICK_REPLY = 'quick-reply';
	public const TYPE_CALL_TO_ACTION = 'call-to-action';
	public const TYPE_CARD = 'card';
	public const TYPE_LIST = 'list';
	public const TYPE_AUTHENTICATION = 'authentication';
	public const TYPE_UNKNOWN = 'unknown';

	// Approval statuses
	public const STATUS_APPROVED = 'approved';
	public const STATUS_PENDING = 'pending';
	public const STATUS_REJECTED = 'rejected';
	public const STATUS_DISABLED = 'disabled';
	public const STATUS_UNKNOWN = 'unknown';

	/**
	 * Provider-specific template ID
	 * - Twilio: Content SID
	 * - 360dialog: Template name
	 */
	public string $id;

	/**
	 * Template name/friendly name
	 */
	public string $name;

	/**
	 * Provider name
	 */
	public string $provider;

	/**
	 * Template language code
	 */
	public ?string $language = null;

	/**
	 * Template type
	 */
	public string $type = self::TYPE_TEXT;

	/**
	 * Template body text
	 */
	public ?string $body = null;

	/**
	 * Header text (if applicable)
	 */
	public ?string $header = null;

	/**
	 * Header type (text, image, video, document)
	 */
	public ?string $headerType = null;

	/**
	 * Footer text (if applicable)
	 */
	public ?string $footer = null;

	/**
	 * Media URL (for media templates)
	 */
	public ?string $mediaUrl = null;

	/**
	 * Buttons array
	 * Each button: ['type' => string, 'text' => string, 'url' => string|null, 'payload' => string|null]
	 */
	public array $buttons = [];

	/**
	 * Variables/parameters configuration
	 */
	public array $variables = [];

	/**
	 * Approval status
	 */
	public string $approvalStatus = self::STATUS_UNKNOWN;

	/**
	 * Rejection reason (if rejected)
	 */
	public ?string $rejectionReason = null;

	/**
	 * Template category
	 */
	public ?string $category = null;

	/**
	 * Date created
	 */
	public ?string $dateCreated = null;

	/**
	 * Date updated
	 */
	public ?string $dateUpdated = null;

	/**
	 * Raw provider data
	 */
	public array $rawData = [];

	/**
	 * Create a new NormalizedTemplate
	 *
	 * @param string $id
	 * @param string $name
	 * @param string $provider
	 */
	public function __construct(string $id, string $name, string $provider)
	{
		$this->id = $id;
		$this->name = $name;
		$this->provider = $provider;
	}

	/**
	 * Create from array
	 *
	 * @param array $data
	 * @return static
	 */
	public static function fromArray(array $data): static
	{
		$template = new static(
			$data['id'] ?? '',
			$data['name'] ?? '',
			$data['provider'] ?? 'unknown'
		);

		foreach ($data as $key => $value) {
			$camelKey = lcfirst(str_replace('_', '', ucwords($key, '_')));
			if (property_exists($template, $camelKey)) {
				$template->$camelKey = $value;
			} elseif (property_exists($template, $key)) {
				$template->$key = $value;
			}
		}

		return $template;
	}

	/**
	 * Convert to array
	 *
	 * @return array
	 */
	public function toArray(): array
	{
		// Get original types array for Twilio compatibility
		// Twilio returns types as ['twilio/text', 'twilio/quick-reply', etc.]
		$types = $this->getOriginalTypes();

		return [
			'id' => $this->id,
			'name' => $this->name,
			'provider' => $this->provider,
			'language' => $this->language,
			'type' => $this->type,
			'body' => $this->body,
			'header' => $this->header,
			'header_type' => $this->headerType,
			'footer' => $this->footer,
			'media_url' => $this->mediaUrl,
			'buttons' => $this->buttons,
			'variables' => $this->variables,
			'approval_status' => $this->approvalStatus,
			'rejection_reason' => $this->rejectionReason,
			'category' => $this->category,
			'date_created' => $this->dateCreated,
			'date_updated' => $this->dateUpdated,

			// Compatibility fields (for existing Vue components)
			'sid' => $this->id,  // Alias for Twilio compatibility
			'types' => $types,   // Original types array for Vue compatibility
		];
	}

	/**
	 * Get original types array for backwards compatibility
	 *
	 * @return array
	 */
	protected function getOriginalTypes(): array
	{
		// If we have raw data with types (Twilio format), use those
		if (!empty($this->rawData['types']) && is_array($this->rawData['types'])) {
			return array_keys($this->rawData['types']);
		}

		// Otherwise, construct from normalized type with provider prefix
		$prefix = $this->provider === 'twilio' ? 'twilio/' : '';
		return [$prefix . $this->type];
	}

	/**
	 * Check if template is approved
	 *
	 * @return bool
	 */
	public function isApproved(): bool
	{
		return $this->approvalStatus === self::STATUS_APPROVED;
	}

	/**
	 * Check if template has buttons
	 *
	 * @return bool
	 */
	public function hasButtons(): bool
	{
		return !empty($this->buttons);
	}

	/**
	 * Check if template has media
	 *
	 * @return bool
	 */
	public function hasMedia(): bool
	{
		return !empty($this->mediaUrl) || $this->type === self::TYPE_MEDIA;
	}

	/**
	 * Get required variable count
	 *
	 * @return int
	 */
	public function getVariableCount(): int
	{
		if (!empty($this->variables)) {
			return count($this->variables);
		}

		// Count placeholders in body {{1}}, {{2}}, etc.
		if ($this->body) {
			preg_match_all('/\{\{(\d+)\}\}/', $this->body, $matches);
			return count(array_unique($matches[1] ?? []));
		}

		return 0;
	}
}