<?php
/**
 * Reinvent WP TTS Plugin Public Functions
 *
 * @package AI_Agent
 */

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

/**
 * GET /error
 *
 * Retrieve error logs from the last 3 months.
 *
 * @return WP_REST_Response A list of recent error logs within the last 3 months.
 */
function rwpai_get_error_logs() {
	$errors = get_option( 'rwpai_errors', array() );

	if ( ! is_array( $errors ) ) {
		$errors = array();
	}

	$three_months_ago = strtotime( '-3 months' );

	// Filter logs to only include those within the last 3 months.
	$recent_errors = array_filter(
		$errors,
		function ( $error ) use ( $three_months_ago ) {
			return isset( $error['timestamp'] ) && $error['timestamp'] >= $three_months_ago;
		}
	);

	// Sort errors by timestamp DESC (newest first).
	usort(
		$recent_errors,
		function ( $a, $b ) {
			return $b['timestamp'] <=> $a['timestamp'];
		}
	);

	return new WP_REST_Response( array_values( $recent_errors ), 200 );
}

/**
 * POST /error
 *
 * Append a new error log to the stored option.
 *
 * @param WP_REST_Request $request The REST request containing the error message and metadata.
 *
 * @return WP_REST_Response A REST response indicating success or failure.
 */
function rwpai_post_error_log( WP_REST_Request $request ) {
	// Rate limit check to prevent abuse.
	$rate_limit = rwpai_rate_limit_check( 'error_log', 40, MINUTE_IN_SECONDS );
	if ( is_wp_error( $rate_limit ) ) {
		return new WP_REST_Response(
			array( 'error' => 'Rate limit exceeded. Please try again later.' ),
			429
		);
	}

	$body = $request->get_json_params();

	if ( empty( $body['message'] ) ) {
		return new WP_REST_Response(
			array( 'error' => 'Message field is required.' ),
			400
		);
	}

	// do strlimit on message length to avoid huge logs.
	$body['message'] = mb_strimwidth( $body['message'], 0, 2000, '...' );

	$errors = get_option( 'rwpai_errors', array() );

	if ( ! is_array( $errors ) ) {
		$errors = array();
	}

	$body['timestamp'] = time();

	// Create the new log entry.
	$new_log = $body;

	$errors[] = $new_log;

	// Optional: Keep the log array from growing too large (e.g., max 1000 entries).
	if ( count( $errors ) > 1000 ) {
		$errors = array_slice( $errors, -1000 ); // Keep last 1000 only.
	}

	update_option( 'rwpai_errors', $errors, false );

	return new WP_REST_Response(
		array(
			'success' => true,
			'data'    => $new_log,
		),
		201
	);
}

/**
 * DELETE /error
 *
 * Clear all stored error logs.
 *
 * @return WP_REST_Response A REST response confirming that logs were cleared.
 */
function rwpai_clean_error_logs() {
	update_option( 'rwpai_errors', array(), false );

	return new WP_REST_Response(
		array(
			'success' => true,
		),
		201
	);
}