<?php
namespace JVBase\meta;

if (!defined('ABSPATH')) {
	exit;
}

/**
 * Single field data container
 * Holds value, config, and tracks dirty state
 */
final class Field
{
	public string $name;
	public mixed $value;
	public mixed $originalValue;
	public array $config;
	public bool $isDirty = false;
	public bool $isValid = true;
	public bool $isDefault = false;
	public array $errors = [];

	public function __construct(string $name, mixed $value, array $config = [])
	{
		$this->name = $name;
		$this->value = $value;
		$this->originalValue = $value;
		$this->config = $config;
		if (array_key_exists('wp', $config) && $config['wp'] === true) {
			$this->isDefault = true;
		}
	}

	/**
	 * Set field value and track dirty state
	 */
	public function set(mixed $value): self
	{
		error_log('Checking if value is the same as old value: '.print_r($value, true));
		if ($value !== $this->value) {
			error_log('Saving new value: '.print_r($value, true));
			$this->value = $value;
			$this->isDirty = true;
		}
		return $this;
	}

	/**
	 * Get current value
	 */
	public function get(): mixed
	{
		return $this->value;
	}

	/**
	 * Mark field as clean (after save)
	 */
	public function markClean(): self
	{
		$this->originalValue = $this->value;
		$this->isDirty = false;
		return $this;
	}

	/**
	 * Reset to original value
	 */
	public function reset(): self
	{
		$this->value = $this->originalValue;
		$this->isDirty = false;
		return $this;
	}

	/**
	 * Add validation error
	 */
	public function addError(string $message): self
	{
		$this->errors[] = $message;
		$this->isValid = false;
		return $this;
	}

	/**
	 * Clear all errors
	 */
	public function clearErrors(): self
	{
		$this->errors = [];
		$this->isValid = true;
		return $this;
	}

	/**
	 * Get field type from config
	 */
	public function type(): string
	{
		return $this->config['type'] ?? 'text';
	}

	/**
	 * Check if this is a WordPress default field
	 */
	public function isWpDefault(): bool
	{
		return $this->isDefault ?? false;
	}

	/**
	 * Check if this is a taxonomy relationship field (not taxonomy_type)
	 */
	public function isTaxonomy(): bool
	{
		return ($this->type() === 'taxonomy' || ($this->type() === 'selector' && isset($this->config['subtype']) && $this->config['subtype'] === 'taxonomy')) && !isset($this->config['isReference']);
	}

	/**
	 * Check if field is required
	 */
	public function isRequired(): bool
	{
		return !empty($this->config['required']);
	}

	/**
	 * Get field label
	 */
	public function label(): string
	{
		return $this->config['label'] ?? $this->name;
	}

	/**
	 * Get field description
	 */
	public function description(): string
	{
		return $this->config['description'] ?? '';
	}
}