<?php
use Joomla\CMS\Log\Log;
\defined('_JEXEC') or die;

class DepotInstallerScript
{
	/**
	 * The Depot version we are updating from
	 */
	protected $fromVersion = null;

	/**
	 * Callback for collectiong errors. Like function(string $context, \Throwable $error){};
	 * 
	 * @var callable
	 * 
	 * @since 4.4.0
	 */
	protected $errorCollector;

	/**
	 * Set the callback for collecting errors.
	 *
	 * @param   callable  $callback  The callback Like function(string $context, \Throwable $error){};
	 *
	 * @return  void
	 *
	 * @since  4.4.0
	 */
	public function setErrorCollector(callable $callback) {
		$this->errorCollector = $callback;
	}

	/**
	 * Collect errors.
	 *
	 * @param  string      $context  A context/place where error happened
	 * @param  \Throwable  $error    The error that occurred
	 *
	 * @return  void
	 *
	 * @since  4.4.0
	 */
	protected function collectError(string $context, \Throwable $error) {
		// The errorCollector are required
		// However when someone already running the script manually the code may fail.
		if ($this->errorCollector) {
			call_user_func($this->errorCollector, $context, $error);
		} else {
			Log::add($error->getMessage(), Log::ERROR, 'Update');
		}
	}

	/**
	 * Function to act prior to installation process begins
	 *
	 * @param   string     $action     Which action is happening (install|uninstall|discover_install|update)
	 * @param   Installer  $installer  The class calling this method
	 *
	 * @return  boolean  True on success
	 *
	 * @since   3.7.0
	 */
	public function preflight($action, $installer) {
		if ($action === 'update') {
			// Get the version we are updating from
			if (!empty($installer->extension->manifest_cache)) {
				$manifestValues = json_decode($installer->extension->manifest_cache, true);

				if (array_key_exists('version', $manifestValues)) {
					$this->fromVersion = $manifestValues['version'];
					
					Log::add(Text::_('COM_DEPOT_PREFLIGHT_FROM_VERSION'), Log::INFO, 'Update');

					return true;
				}
			}

			return false;
		}

		return true;
	}

	/**
	 * Method to update Depot
	 *
	 * @param   Installer  $installer  The class calling this method
	 *
	 * @return  void
	 */
	public function update($installer) {

	}

	/**
	 * Called after any type of action
	 *
	 * @param   string     $action     Which action is happening (install|uninstall|discover_install|update)
	 * @param   Installer  $installer  The class calling this method
	 *
	 * @return  boolean  True on success
	 *
	 * @since   4.0.0
	 */
	public function postflight($action, $installer)
	{
		if ($action !== 'update') {
			return true;
		}

		if (empty($this->fromVersion) || version_compare($this->fromVersion, '0.0.1', 'ge')) {
			return true;
		}
		return true;
	}
}