<?php
/**
 * Installation
 *
 * @package SimpleCalendar
 */
namespace SimpleCalendar;

use SimpleCalendar\Admin\Pages;

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

/**
 * Installation.
 *
 * Static class that deals with plugin activation and deactivation events.
 *
 * @since 3.0.0
 */
class Installation
{
	/**
	 * What happens when the plugin is activated.
	 *
	 * @since 3.0.0
	 */
	public static function activate()
	{
		include_once 'functions/shared.php';
		include_once 'functions/admin.php';

		self::create_terms();
		self::create_options();

		// Clear cache on activation.
		simcal_delete_feed_transients();

		do_action('simcal_activated');
	}

	/**
	 * What happens when the plugin is deactivated.
	 *
	 * @since 3.0.0
	 */
	public static function deactivate()
	{
		flush_rewrite_rules();

		do_action('simcal_deactivated');
	}

	/**
	 * Create default terms.
	 *
	 * @since 3.0.0
	 */
	public static function create_terms()
	{
		$taxonomies = [
			'calendar_feed' => ['google', 'grouped-calendar'],
			'calendar_type' => ['default-calendar'],
		];

		foreach ($taxonomies as $taxonomy => $terms) {
			foreach ($terms as $term) {
				if (!get_term_by('slug', sanitize_title($term), $taxonomy)) {
					wp_insert_term($term, $taxonomy);
				}
			}
		}
	}

	/**
	 * Sets the default options.
	 *
	 * @since 3.0.0
	 */
	public static function create_options()
	{
		$default = '';
		$page = 'settings';
		$settings_pages = new Pages($page);
		$plugin_settings = $settings_pages->get_settings();

		if ($plugin_settings && is_array($plugin_settings)) {
			foreach ($plugin_settings as $id => $settings) {
				$group = 'simple-calendar_' . $page . '_' . $id;

				if (isset($settings['sections'])) {
					if ($settings['sections'] && is_array($settings['sections'])) {
						foreach ($settings['sections'] as $section_id => $section) {
							if (isset($section['fields'])) {
								if ($section['fields'] && is_array($section['fields'])) {
									foreach ($section['fields'] as $key => $field) {
										if (isset($field['type'])) {
											// Maybe an associative array.
											if (is_int($key)) {
												$default[$section_id] = self::get_field_default_value($field);
											} else {
												$default[$section_id][$key] = self::get_field_default_value($field);
											}
										}
									} // Loop fields.
								} // Are fields non empty?
							} // Are there fields?
						} // Loop fields sections.
					} // Are sections non empty?
				} // Are there sections?

				add_option($group, $default, '', true);

				// Reset before looping next settings page.
				$default = '';
			}
		}
	}

	/**
	 * Get field default value.
	 *
	 * Helper function to set the default value of a field.
	 *
	 * @since  3.0.0
	 *
	 * @param  $field
	 *
	 * @return mixed
	 */
	private static function get_field_default_value($field)
	{
		$saved_value = isset($field['value']) ? $field['value'] : '';
		$default_value = isset($field['default']) ? $field['default'] : '';

		return !empty($saved_value) ? $saved_value : $default_value;
	}
}
