<?php
/**
 * Plugin Name: WP Agentic Writer
 * Plugin URI: https://github.com/wp-agentic-writer
 * Description: Plan-first AI writing workflow for WordPress. Scribble → Research → Plan → Execute → Revise
 * Version: 0.1.3
 * Author: WP Agentic Writer
 * Author URI: https://github.com/wp-agentic-writer
 * License: GPL-2.0+
 * License URI: http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain: wp-agentic-writer
 * Domain Path: /languages
 * Requires at least: 6.6
 * Requires PHP: 7.4
 *
 * @package WP_Agentic_Writer
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Plugin version.
define( 'WP_AGENTIC_WRITER_VERSION', '0.1.3' );

// Plugin file path.
define( 'WP_AGENTIC_WRITER_FILE', __FILE__ );

// Plugin directory path.
define( 'WP_AGENTIC_WRITER_DIR', plugin_dir_path( __FILE__ ) );

// Plugin directory URL (plugin_dir_url already includes trailing slash).
define( 'WP_AGENTIC_WRITER_URL', untrailingslashit( plugin_dir_url( __FILE__ ) ) . '/' );

// Include autoloader.
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-autoloader.php';

// Include provider interface and manager.
require_once WP_AGENTIC_WRITER_DIR . 'includes/interface-ai-provider.php';
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-provider-manager.php';

// Include WordPress 7.0 AI Client wrapper (backward compatible).
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-wp-ai-client-wrapper.php';

// Include conversation manager for session-based chat history.
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-conversation-migration.php';
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-conversation-manager.php';

// Include model registry for centralized model defaults.
require_once WP_AGENTIC_WRITER_DIR . 'includes/class-model-registry.php';

// Initialize the plugin.
function wp_agentic_writer_init() {
	// Load plugin text domain.
	load_plugin_textdomain(
		'wp-agentic-writer',
		false,
		dirname( plugin_basename( __FILE__ ) ) . '/languages/'
	);

	// Always initialize Gutenberg sidebar for REST API routes.
	WP_Agentic_Writer_Gutenberg_Sidebar::get_instance();

	// Always initialize cost tracker hooks (REST API calls need this).
	WP_Agentic_Writer_Cost_Tracker::get_instance();

	// Schedule image cleanup cron job if not already scheduled.
	if ( ! wp_next_scheduled( 'wpaw_cleanup_temp_images' ) ) {
		wp_schedule_event( time(), 'daily', 'wpaw_cleanup_temp_images' );
	}

	// Initialize SEO Schema Agent
	WP_Agentic_Writer_SEO_Schema::get_instance();

	// Check if we're on the admin side.
	if ( is_admin() ) {
		// Initialize settings - V2 is now the default.
		$use_settings_v2 = true;
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( isset( $_GET['wpaw_settings_v2'] ) ) {
			$use_settings_v2 = ( $_GET['wpaw_settings_v2'] === '1' );
		}

		// Also check if this is an AJAX request for V2 endpoints.
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( defined( 'DOING_AJAX' ) && DOING_AJAX && isset( $_POST['action'] ) ) {
			$v2_ajax_actions = array(
				'wpaw_get_cost_log_data',
				'wpaw_get_header_stats',
				'wpaw_test_api_connection',
				'wpaw_refresh_models',
			);
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( in_array( $_POST['action'], $v2_ajax_actions, true ) ) {
				$use_settings_v2 = true;
			}
		}	

		if ( $use_settings_v2 ) {
			require_once WP_AGENTIC_WRITER_DIR . 'includes/class-settings-v2.php';
			WP_Agentic_Writer_Settings_V2::get_instance();
		} else {
			WP_Agentic_Writer_Settings::get_instance();
		}
		
		// Initialize admin columns.
		WP_Agentic_Writer_Admin_Columns::get_instance();
	}

}
add_action( 'plugins_loaded', 'wp_agentic_writer_init' );

// Hook for image cleanup cron job.
add_action( 'wpaw_cleanup_temp_images', 'wp_agentic_writer_cleanup_temp_images' );

/**
 * Cleanup old temp images (7+ days).
 *
 * @since 0.1.0
 */
function wp_agentic_writer_cleanup_temp_images() {
	WP_Agentic_Writer_Image_Manager::get_instance()->cleanup_old_temp_images();
}

// Activation hook.
register_activation_hook( __FILE__, 'wp_agentic_writer_activate' );

/**
 * Plugin activation.
 *
 * @since 0.1.0
 */
function wp_agentic_writer_activate() {
	// Set default options using model registry for consistency.
	$registry_defaults = WPAW_Model_Registry::get_activation_defaults();
	$default_options = array(
		'openrouter_api_key' => '',
		'planning_model' => $registry_defaults['planning_model'],
		'execution_model' => $registry_defaults['execution_model'],
		'image_model' => $registry_defaults['image_model'],
		'web_search_enabled' => false,
		'search_engine' => 'auto',
		'search_depth' => 'medium',
		'cost_tracking_enabled' => true,
		'enable_clarification_quiz' => true,
		'clarity_confidence_threshold' => '0.6',
		'chat_history_limit' => 20,
		'preferred_languages' => array( 'auto', 'English', 'Indonesian' ),
		'custom_languages' => array(),
	);

	add_option( 'wp_agentic_writer_settings', $default_options );

	// Set default custom models (separate option for custom models)
	$default_custom_models = array(
		array(
			'id'   => 'black-forest-labs/flux-1.1-pro',
			'name' => 'FLUX 1.1 Pro',
			'type' => 'image',
		),
		array(
			'id'   => 'black-forest-labs/flux-pro',
			'name' => 'FLUX Pro',
			'type' => 'image',
		),
		array(
			'id'   => 'recraft-ai/recraft-v3',
			'name' => 'Recraft V3',
			'type' => 'image',
		),
	);
	add_option( 'wp_agentic_writer_custom_models', $default_custom_models );

	// Create cost tracking table.
	wp_agentic_writer_create_cost_table();

	// Create image management tables.
	WP_Agentic_Writer_Image_Manager::get_instance()->create_tables();

	// Create conversations table.
	require_once WP_AGENTIC_WRITER_DIR . 'includes/class-conversation-migration.php';
	wpaw_create_conversations_table();
}

/**
 * Create cost tracking table.
 *
 * @since 0.1.0
 */
function wp_agentic_writer_create_cost_table() {
	global $wpdb;

	$table_name = $wpdb->prefix . 'wpaw_cost_tracking';
	$charset_collate = $wpdb->get_charset_collate();

	$sql = "CREATE TABLE $table_name (
		id bigint(20) NOT NULL AUTO_INCREMENT,
		post_id bigint(20) NOT NULL,
		session_id varchar(32) DEFAULT '' NOT NULL,
		model varchar(255) NOT NULL,
		provider varchar(50) DEFAULT 'openrouter' NOT NULL,
		action varchar(50) NOT NULL,
		input_tokens int(11) NOT NULL,
		output_tokens int(11) NOT NULL,
		cost decimal(10,6) NOT NULL,
		status varchar(20) DEFAULT 'success' NOT NULL,
		created_at datetime DEFAULT CURRENT_TIMESTAMP NOT NULL,
		PRIMARY KEY  (id),
		KEY post_id (post_id),
		KEY session_id (session_id),
		KEY provider (provider),
		KEY action (action),
		KEY created_at (created_at)
	) $charset_collate;";

	require_once ABSPATH . 'wp-admin/includes/upgrade.php';
	dbDelta( $sql );
}

// Version-based table creation (runs on plugins_loaded to ensure tables exist).
add_action( 'plugins_loaded', 'wp_agentic_writer_maybe_create_tables' );

/**
 * Create database tables if they don't exist or version is outdated.
 *
 * @since 0.1.0
 */
function wp_agentic_writer_maybe_create_tables() {
	// Cost tracking table - controlled by main db version.
	$current_version  = get_option( 'wpaw_db_version', '0' );
	$required_version = '1.1.0';

	if ( version_compare( $current_version, $required_version, '<' ) ) {
		// Create cost tracking table.
		wp_agentic_writer_create_cost_table();

		// Create image management tables.
		WP_Agentic_Writer_Image_Manager::get_instance()->create_tables();

		// Create conversations table (migrate if needed).
		if ( ! function_exists( 'wpaw_create_conversations_table' ) ) {
			require_once WP_AGENTIC_WRITER_DIR . 'includes/class-conversation-migration.php';
		}
		wpaw_create_conversations_table();

		// Update version.
		update_option( 'wpaw_db_version', $required_version );
	} else {
		// Even if main version is current, still check conversation table independently.
		if ( ! function_exists( 'wpaw_create_conversations_table' ) ) {
			require_once WP_AGENTIC_WRITER_DIR . 'includes/class-conversation-migration.php';
		}

		$conv_version = get_option( 'wpaw_conversations_db_version', '0' );
		if ( version_compare( $conv_version, '0.1.4', '<' ) ) {
			wpaw_create_conversations_table();
		}
	}
}

// Deactivation hook.
register_deactivation_hook( __FILE__, 'wp_agentic_writer_deactivate' );

/**
 * Plugin deactivation.
 *
 * @since 0.1.0
 */
function wp_agentic_writer_deactivate() {
	// Clear scheduled cron jobs.
	$timestamp = wp_next_scheduled( 'wpaw_cleanup_temp_images' );
	if ( $timestamp ) {
		wp_unschedule_event( $timestamp, 'wpaw_cleanup_temp_images' );
	}
	wp_clear_scheduled_hook( 'wpaw_cleanup_old_sessions' );
}

// Uninstall hook.
register_uninstall_hook( __FILE__, 'wp_agentic_writer_uninstall' );

/**
 * Plugin uninstall.
 *
 * Removes all plugin data including settings, database tables,
 * post meta, user meta, transients, scheduled events, and temp files.
 *
 * @since 0.1.0
 */
function wp_agentic_writer_uninstall() {
	global $wpdb;

	// Delete options.
	delete_option( 'wp_agentic_writer_settings' );
	delete_option( 'wpaw_db_version' );
	delete_option( 'wpaw_conversations_db_version' );
	delete_option( 'wp_agentic_writer_custom_models' );

	// Delete post meta.
	$post_meta_keys = array(
		'_wpaw_plan',
		'_wpaw_chat_history',
		'_wpaw_memory',
		'_wpaw_post_config',
		'_wpaw_focus_keyword',
		'_wpaw_writing_status',
		'_wpaw_current_section',
		'_wpaw_sections_written',
		'_wpaw_writing_state_updated',
		'_wpaw_plan_id',
		'_wpaw_resume_token',
	);
	foreach ( $post_meta_keys as $key ) {
		delete_post_meta_by_key( $key );
	}

	// Delete user meta.
	$wpdb->query(
		$wpdb->prepare(
			"DELETE FROM {$wpdb->usermeta} WHERE meta_key LIKE %s",
			'wpaw_%'
		)
	);

	// Delete database tables.
	$tables = array(
		$wpdb->prefix . 'wpaw_cost_tracking',
		$wpdb->prefix . 'wpaw_images',
		$wpdb->prefix . 'wpaw_images_variants',
		$wpdb->prefix . 'wpaw_conversations',
	);
	foreach ( $tables as $table ) {
		$wpdb->query( "DROP TABLE IF EXISTS {$table}" );
	}

	// Clear transients.
	delete_transient( 'wpaw_openrouter_models' );
	delete_transient( 'wpaw_openrouter_model_objects' );
	delete_transient( 'wpaw_openrouter_model_ids' );

	// Unschedule cron events.
	wp_clear_scheduled_hook( 'wpaw_cleanup_old_sessions' );
	wp_clear_scheduled_hook( 'wpaw_daily_cleanup' );

	// Delete temp image directory.
	$upload_dir = wp_upload_dir();
	$temp_dir   = $upload_dir['basedir'] . '/wpaw';
	if ( file_exists( $temp_dir ) ) {
		$files = new RecursiveIteratorIterator(
			new RecursiveDirectoryIterator( $temp_dir, RecursiveDirectoryIterator::SKIP_DOTS ),
			RecursiveIteratorIterator::CHILD_FIRST
		);
		foreach ( $files as $fileinfo ) {
			$todo = ( $fileinfo->isDir() ? 'rmdir' : 'unlink' );
			$todo( $fileinfo->getRealPath() );
		}
		rmdir( $temp_dir );
	}
}