<?php
/**
 * Plugin Name:       Aidevelopia — AI Chatbot & Support Agent
 * Plugin URI:        https://aidevelopia.com/integrations/wordpress
 * Description:       Add an AI support agent to your site in one minute. Trained on your own docs and website, answers customers 24/7, hands off to a human when it matters.
 * Version:           1.0.0
 * Requires at least: 5.8
 * Requires PHP:      7.4
 * Author:            Aidevelopia
 * Author URI:        https://aidevelopia.com
 * License:           GPLv2 or later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       aidevelopia-chatbot
 */

// Direct access guard — required by the WordPress.org review checklist.
defined( 'ABSPATH' ) || exit;

define( 'AIDEV_CHATBOT_VERSION', '1.0.0' );
define( 'AIDEV_CHATBOT_DEFAULT_API_URL', 'https://aidevelopia.com' );

/**
 * ── Settings registration ────────────────────────────────────────────────
 * Two options, both sanitized on the way in:
 *   aidev_chatbot_api_key — the tenant's widget API key (required)
 *   aidev_chatbot_api_url — the Aidevelopia origin (advanced; default prod)
 */
function aidev_chatbot_register_settings() {
	register_setting(
		'aidev_chatbot',
		'aidev_chatbot_api_key',
		array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => '',
		)
	);
	register_setting(
		'aidev_chatbot',
		'aidev_chatbot_api_url',
		array(
			'type'              => 'string',
			'sanitize_callback' => 'esc_url_raw',
			'default'           => AIDEV_CHATBOT_DEFAULT_API_URL,
		)
	);
}
add_action( 'admin_init', 'aidev_chatbot_register_settings' );

/**
 * ── Key verification (2026-07-31) ───────────────────────────────────────
 * Pings {api_url}/api/widget/config with the saved key, server-side, and
 * caches the verdict keyed to a hash of key+url — so it re-checks exactly
 * once after every settings change, never on normal page loads.
 * Identifies itself via User-Agent so Aidevelopia can see plugin installs.
 *
 * @return string|null 'ok' | 'bad' | 'unreachable' | null (no key saved)
 */
function aidev_chatbot_key_status() {
	$api_key = get_option( 'aidev_chatbot_api_key', '' );
	if ( '' === $api_key ) {
		return null;
	}
	$api_url = get_option( 'aidev_chatbot_api_url', AIDEV_CHATBOT_DEFAULT_API_URL );
	$sig     = md5( $api_key . '|' . $api_url );

	$cached = get_option( 'aidev_chatbot_key_check' );
	if ( is_array( $cached ) && isset( $cached['sig'], $cached['status'] ) && $cached['sig'] === $sig ) {
		return $cached['status'];
	}

	$response = wp_remote_get(
		trailingslashit( $api_url ) . 'api/widget/config',
		array(
			'timeout'    => 6,
			'headers'    => array(
				'X-Tenant-Api-Key' => $api_key,
				'Accept'           => 'application/json',
			),
			'user-agent' => 'aidevelopia-wordpress-plugin/' . AIDEV_CHATBOT_VERSION . '; ' . home_url(),
		)
	);

	if ( is_wp_error( $response ) ) {
		$status = 'unreachable';
	} else {
		$status = 200 === wp_remote_retrieve_response_code( $response ) ? 'ok' : 'bad';
	}

	update_option( 'aidev_chatbot_key_check', array( 'sig' => $sig, 'status' => $status ), false );

	return $status;
}

/**
 * ── Settings page (Settings → Aidevelopia) ──────────────────────────────
 */
function aidev_chatbot_add_settings_page() {
	add_options_page(
		__( 'Aidevelopia Chatbot', 'aidevelopia-chatbot' ),
		__( 'Aidevelopia', 'aidevelopia-chatbot' ),
		'manage_options',
		'aidevelopia-chatbot',
		'aidev_chatbot_render_settings_page'
	);
}
add_action( 'admin_menu', 'aidev_chatbot_add_settings_page' );

function aidev_chatbot_render_settings_page() {
	if ( ! current_user_can( 'manage_options' ) ) {
		return;
	}
	$api_key = get_option( 'aidev_chatbot_api_key', '' );
	$api_url = get_option( 'aidev_chatbot_api_url', AIDEV_CHATBOT_DEFAULT_API_URL );
	$status  = aidev_chatbot_key_status(); // re-verifies only when key/url changed
	?>
	<div class="wrap">
		<h1><?php esc_html_e( 'Aidevelopia — AI Chatbot & Support Agent', 'aidevelopia-chatbot' ); ?></h1>

		<?php if ( null === $status ) : ?>
			<div class="notice notice-info">
				<p>
					<?php esc_html_e( 'Almost there! Paste your API key below. You can find it in your Aidevelopia dashboard under Channels → Website → Embed.', 'aidevelopia-chatbot' ); ?>
					<a href="https://aidevelopia.com/dashboard/website" target="_blank" rel="noopener noreferrer">
						<?php esc_html_e( 'Open my dashboard', 'aidevelopia-chatbot' ); ?>
					</a>
					·
					<a href="https://aidevelopia.com/register" target="_blank" rel="noopener noreferrer">
						<?php esc_html_e( "Don't have an account? Start free", 'aidevelopia-chatbot' ); ?>
					</a>
				</p>
			</div>
		<?php elseif ( 'ok' === $status ) : ?>
			<div class="notice notice-success">
				<p><strong>✓ <?php esc_html_e( 'Key verified', 'aidevelopia-chatbot' ); ?></strong> — <?php esc_html_e( 'your AI agent is live on this site. Visit any page to see the chat bubble bottom-right.', 'aidevelopia-chatbot' ); ?></p>
			</div>
		<?php elseif ( 'bad' === $status ) : ?>
			<div class="notice notice-error">
				<p><strong>✗ <?php esc_html_e( 'Key not recognized', 'aidevelopia-chatbot' ); ?></strong> — <?php esc_html_e( 'Aidevelopia rejected this API key. Copy it again from your dashboard (Channels → Website → Embed) and make sure there are no extra spaces.', 'aidevelopia-chatbot' ); ?></p>
			</div>
		<?php else : /* unreachable */ ?>
			<div class="notice notice-warning">
				<p><strong>⚠ <?php esc_html_e( 'Could not reach Aidevelopia from this server', 'aidevelopia-chatbot' ); ?></strong> — <?php esc_html_e( 'the key could not be checked (your hosting may block outgoing requests). The widget can still work in visitors\' browsers — check your site\'s front end.', 'aidevelopia-chatbot' ); ?></p>
			</div>
		<?php endif; ?>

		<form action="options.php" method="post">
			<?php settings_fields( 'aidev_chatbot' ); ?>
			<table class="form-table" role="presentation">
				<tr>
					<th scope="row">
						<label for="aidev_chatbot_api_key"><?php esc_html_e( 'API key', 'aidevelopia-chatbot' ); ?></label>
					</th>
					<td>
						<input
							type="text"
							id="aidev_chatbot_api_key"
							name="aidev_chatbot_api_key"
							value="<?php echo esc_attr( $api_key ); ?>"
							class="regular-text code"
							autocomplete="off"
						/>
						<p class="description">
							<?php esc_html_e( 'From your Aidevelopia dashboard: Channels → Website → Embed.', 'aidevelopia-chatbot' ); ?>
						</p>
					</td>
				</tr>
				<tr>
					<th scope="row">
						<label for="aidev_chatbot_api_url"><?php esc_html_e( 'API URL (advanced)', 'aidevelopia-chatbot' ); ?></label>
					</th>
					<td>
						<input
							type="url"
							id="aidev_chatbot_api_url"
							name="aidev_chatbot_api_url"
							value="<?php echo esc_attr( $api_url ); ?>"
							class="regular-text code"
						/>
						<p class="description">
							<?php esc_html_e( 'Leave as-is unless Aidevelopia support tells you otherwise.', 'aidevelopia-chatbot' ); ?>
						</p>
					</td>
				</tr>
			</table>
			<?php submit_button(); ?>
		</form>
	</div>
	<?php
}

/**
 * ── Settings shortcut on the Plugins list row ───────────────────────────
 */
function aidev_chatbot_action_links( $links ) {
	$settings = '<a href="' . esc_url( admin_url( 'options-general.php?page=aidevelopia-chatbot' ) ) . '">'
		. esc_html__( 'Settings', 'aidevelopia-chatbot' ) . '</a>';
	array_unshift( $links, $settings );
	return $links;
}
add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'aidev_chatbot_action_links' );

/**
 * ── Front-end embed ─────────────────────────────────────────────────────
 * Enqueued (not echoed) so Plugin Check is happy; the widget loader reads
 * its config from data-* attributes, which core enqueues can't express —
 * the script_loader_tag filter below adds them to OUR tag only.
 * Nothing loads until an API key is saved. Never loads in wp-admin.
 */
function aidev_chatbot_enqueue_widget() {
	$api_key = get_option( 'aidev_chatbot_api_key', '' );
	if ( '' === $api_key ) {
		return;
	}
	$api_url = get_option( 'aidev_chatbot_api_url', AIDEV_CHATBOT_DEFAULT_API_URL );
	if ( '' === $api_url ) {
		$api_url = AIDEV_CHATBOT_DEFAULT_API_URL;
	}

	wp_enqueue_script(
		'aidevelopia-chatbot',
		trailingslashit( $api_url ) . 'developia.js',
		array(),
		AIDEV_CHATBOT_VERSION,
		true // footer
	);
}
add_action( 'wp_enqueue_scripts', 'aidev_chatbot_enqueue_widget' );

/**
 * Add the loader's data-* attributes to our script tag only.
 */
function aidev_chatbot_script_attributes( $tag, $handle ) {
	if ( 'aidevelopia-chatbot' !== $handle ) {
		return $tag;
	}
	$api_key = get_option( 'aidev_chatbot_api_key', '' );
	$api_url = get_option( 'aidev_chatbot_api_url', AIDEV_CHATBOT_DEFAULT_API_URL );

	return str_replace(
		' src=',
		' data-api-key="' . esc_attr( $api_key ) . '" data-api-url="' . esc_attr( untrailingslashit( $api_url ) ) . '" src=',
		$tag
	);
}
add_filter( 'script_loader_tag', 'aidev_chatbot_script_attributes', 10, 2 );