<?php
/** Edition selection runs before either plugin defines its shared runtime. */
if (!defined('ABSPATH')) { exit; }
require_once __DIR__ . '/edition-identity.php';

if (!function_exists('fqbp_claim_edition')) {
	function fqbp_claim_edition($edition, $plugin_file = null)
	{
		if (defined('FQBPRO_EDITION')) return false;
		// Older Free bootstraps call this with the edition alone.
		$plugin = $plugin_file ? plugin_basename($plugin_file) : ($edition === 'pro' ? fqbp_known_plugins('pro')[0] : fqbp_known_plugins('free')[1]);
		$network = is_multisite() ? (array) get_site_option('active_sitewide_plugins', []) : [];
		if (!fqbp_can_claim_edition($edition, $plugin, (array) get_option('active_plugins', []), array_keys($network))) return false;
		define('FQBPRO_EDITION', $edition === 'free' ? 'free' : 'pro');
		return true;
	}

	function fqbp_edition_info()
	{
		$pro = !defined('FQBPRO_EDITION') || FQBPRO_EDITION === 'pro';
		return ['edition' => $pro ? 'pro' : 'free', 'features' => [
			'taxonomy' => true, 'search' => $pro, 'publishDate' => $pro, 'postSort' => $pro, 'loadMore' => $pro, 'freshResults' => $pro, 'layouts' => true,
			'customFields' => $pro, 'number' => $pro, 'eventDates' => $pro, 'advancedQuery' => $pro, 'legacyV3' => $pro,
		]];
	}
}

// Register independently of the claimed runtime: activating the other edition
// loads its bootstrap while this request still runs the previously active one.
if (!function_exists('fqbp_register_edition_guard')) {
	function fqbp_edition_plugins()
	{
		return fqbp_known_plugins();
	}

	function fqbp_free_activation_conflict($plugin, $network_wide)
	{
		if (!in_array($plugin, fqbp_known_plugins('free'), true)) return '';
		$find = static function () use ($plugin) {
			foreach (fqbp_known_plugins() as $other) {
				if ($other !== $plugin && is_plugin_active($other)) {
					return in_array($other, fqbp_known_plugins('pro'), true) ? 'free-conflict' : 'free-duplicate';
				}
			}
			return '';
		};
		$conflict = $find();
		if (!$conflict && $network_wide && is_multisite()) {
			foreach (get_sites(['fields' => 'ids', 'number' => 0]) as $site_id) {
				switch_to_blog((int) $site_id);
				try { $conflict = $find(); }
				finally { restore_current_blog(); }
				if ($conflict) break;
			}
		}
		return $conflict;
	}

	function fqbp_guard_edition_activation($plugin, $network_wide)
	{
		// Free may refuse its own activation; commercial Pro owns its handoff.
		$conflict = fqbp_free_activation_conflict($plugin, $network_wide);
		if ($conflict) fqbp_block_edition_activation($conflict);
	}

	function fqbp_edition_notice_message($code)
	{
		switch ($code) {
			case 'free-conflict':
				return __('The Free edition was not activated because Filter Query Block Pro is already active. To use Free, deactivate Pro first. Your filters and settings have been preserved.', 'accomplice-query-loop-filters');
			case 'free-duplicate':
				return __('The Free edition was not activated because another Free installation is active. Deactivate that installation first. Your filters and settings have been preserved.', 'accomplice-query-loop-filters');
			case 'pro-network-conflict':
				return __('Filter Query Block Pro was not activated because Free is active for the network. Activate Pro from Network Admin to replace it for all sites.', 'accomplice-query-loop-filters');
			case 'pro-upgrade':
				return __('Filter Query Block Pro is active and the Free edition has been deactivated. Your filters and settings have been preserved.', 'accomplice-query-loop-filters');
			case 'duplicate':
				return __('A duplicate Filter Query Block edition disabled itself because another edition is already running. Your filters and settings have been preserved.', 'accomplice-query-loop-filters');
		}
		return '';
	}

	function fqbp_set_edition_notice($code)
	{
		if (!get_current_user_id() || !fqbp_edition_notice_message($code)) return;
		set_transient('fqbp_edition_notice_' . get_current_user_id(), $code, 5 * MINUTE_IN_SECONDS);
	}

	function fqbp_block_edition_activation($code)
	{
		if (defined('WP_CLI') && WP_CLI) {
			\WP_CLI::error(fqbp_edition_notice_message($code));
		}
		fqbp_set_edition_notice($code);
		// Return to the ordinary Plugins screen before core persists activation.
		// This also replaces core's provisional activation-error redirect.
		wp_safe_redirect(self_admin_url('plugins.php'));
		exit;
	}

	function fqbp_render_edition_notice()
	{
		global $pagenow;
		if ($pagenow !== 'plugins.php' || (!current_user_can('activate_plugins') && !current_user_can('manage_network_plugins'))) return;
		$key = 'fqbp_edition_notice_' . get_current_user_id();
		$code = get_transient($key);
		$message = fqbp_edition_notice_message($code);
		if ($message === '') return;
		delete_transient($key);
		wp_admin_notice(esc_html($message), ['type' => $code === 'pro-upgrade' ? 'success' : 'warning', 'dismissible' => true]);
	}

	function fqbp_register_edition_guard($plugin_file)
	{
		static $registered = [];
		$plugin = plugin_basename($plugin_file);
		if (!in_array($plugin, fqbp_edition_plugins(), true)) return;
		if (isset($registered[$plugin])) return;
		$registered[$plugin] = true;
		add_action('admin_init', static function () use ($plugin) {
			if (!defined('FQBPRO_PLUGIN_BASENAME') || FQBPRO_PLUGIN_BASENAME === $plugin || !is_plugin_active($plugin)) return;
			$network_wide = is_plugin_active_for_network($plugin);
			if (!current_user_can($network_wide ? 'manage_network_plugins' : 'activate_plugins')) return;
			// WordPress.org permits self-deactivation to prevent errors, never
			// deactivating another plugin. This closure owns its bootstrap only.
			// Skip cleanup callbacks because the surviving edition uses our data.
			deactivate_plugins($plugin, true, $network_wide);
			fqbp_set_edition_notice('duplicate');
		});
	}

	add_action('activate_plugin', 'fqbp_guard_edition_activation', 10, 2);
	add_action('admin_notices', 'fqbp_render_edition_notice');
	add_action('network_admin_notices', 'fqbp_render_edition_notice');
}