<?php
/**
 * Front end: assets, floating widget and shortcode.
 *
 * @package AviSupportAssistant
 */

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

/**
 * Whether the floating assistant should be shown on this request.
 *
 * @return bool
 */
function avca_should_display() {
	$settings = avca_get_settings();
	$display  = ! is_admin() && ! empty( $settings['enabled'] );

	if ( $display && '' !== $settings['exclude_pages'] && is_singular() ) {
		$excluded = wp_parse_id_list( $settings['exclude_pages'] );
		$display  = ! in_array( (int) get_queried_object_id(), $excluded, true );
	}

	/**
	 * Filter whether to display the floating support assistant on the current request.
	 *
	 * @param bool  $display  Whether to display.
	 * @param array $settings Plugin settings.
	 */
	return (bool) apply_filters( 'avca_display_button', $display, $settings );
}

/**
 * Data passed to the chat script.
 *
 * @return array
 */
function avca_get_script_data() {
	$settings = avca_get_settings();
	$defaults = avca_get_defaults();
	$faqs     = array();

	foreach ( (array) $settings['faqs'] as $faq ) {
		if ( empty( $faq['question'] ) || empty( $faq['answer'] ) ) {
			continue;
		}
		$faqs[] = array(
			'question' => (string) $faq['question'],
			'keywords' => isset( $faq['keywords'] ) ? (string) $faq['keywords'] : '',
			'answer'   => (string) $faq['answer'],
		);
	}

	$contact = array(
		'show'     => $settings['contact_show'],
		'call'     => '' !== $settings['call_number'] ? array(
			'label' => '' !== $settings['call_label'] ? $settings['call_label'] : $defaults['call_label'],
			'url'   => 'tel:' . $settings['call_number'],
		) : null,
		'callback' => ! empty( $settings['callback'] ) ? array(
			'label' => '' !== $settings['callback_label'] ? $settings['callback_label'] : $defaults['callback_label'],
		) : null,
		'whatsapp' => '' !== $settings['whatsapp_number'] ? array(
			'label'  => '' !== $settings['whatsapp_label'] ? $settings['whatsapp_label'] : $defaults['whatsapp_label'],
			'number' => $settings['whatsapp_number'],
			'text'   => $settings['whatsapp_text'],
		) : null,
	);

	$data = array(
		'restUrl'        => esc_url_raw( rest_url( AVCA_REST_NAMESPACE . '/' ) ),
		'contact'        => $contact,
		'welcome'        => $settings['welcome'],
		'fallback'       => '' !== $settings['fallback'] ? $settings['fallback'] : $defaults['fallback'],
		'faqs'           => $faqs,
		'maxSuggestions' => (int) $settings['max_suggestions'],
		'quickLinks'     => avca_parse_quick_links( $settings['quick_links'] ),
		'siteSearch'     => ! empty( $settings['site_search'] ) && ! empty( $settings['search_types'] ),
		'leadForm'       => ! empty( $settings['lead_form'] ),
		'leadPhone'      => ! empty( $settings['lead_phone'] ),
		'leadPrompt'     => '' !== $settings['lead_prompt'] ? $settings['lead_prompt'] : $defaults['lead_prompt'],
		'leadButton'     => '' !== $settings['lead_button'] ? $settings['lead_button'] : $defaults['lead_button'],
		'leadThanks'     => '' !== $settings['lead_thanks'] ? $settings['lead_thanks'] : $defaults['lead_thanks'],
		'logUnanswered'  => ! empty( $settings['log_unanswered'] ),
		'autoOpen'       => (int) $settings['auto_open'],
		'i18n'           => array(
			'typing'        => __( 'Typing…', 'avi-support-assistant' ),
			'open'          => '' !== $settings['tooltip'] ? $settings['tooltip'] : $defaults['tooltip'],
			'close'         => __( 'Close chat', 'avi-support-assistant' ),
			'searchIntro'   => __( 'I found these pages that may help:', 'avi-support-assistant' ),
			'name'          => __( 'Your name', 'avi-support-assistant' ),
			'email'         => __( 'Email address', 'avi-support-assistant' ),
			'phone'         => __( 'Phone (optional)', 'avi-support-assistant' ),
			'message'       => __( 'How can we help?', 'avi-support-assistant' ),
			'send'          => __( 'Send', 'avi-support-assistant' ),
			'sending'       => __( 'Sending…', 'avi-support-assistant' ),
			'required'      => __( 'Please enter your name and a valid email address.', 'avi-support-assistant' ),
			'error'         => __( 'Sorry, something went wrong. Please try again.', 'avi-support-assistant' ),
			'leaveDetails'  => __( 'I would like to leave my details.', 'avi-support-assistant' ),
			'callbackAsk'   => __( 'I would like a callback.', 'avi-support-assistant' ),
			'callbackIntro' => __( 'Sure! Share your number and a good time to call, and our team will call you back.', 'avi-support-assistant' ),
			'phoneNeeded'   => __( 'Phone number', 'avi-support-assistant' ),
			'bestTime'      => __( 'Best time to call (optional)', 'avi-support-assistant' ),
			'callbackDone'  => __( 'Thank you! We will call you back soon.', 'avi-support-assistant' ),
			'needPhone'     => __( 'Please enter your name and phone number.', 'avi-support-assistant' ),
		),
	);

	/**
	 * Filter the data passed to the chat script. Used by the Pro add-on.
	 *
	 * @param array $data     Script data.
	 * @param array $settings Plugin settings.
	 */
	return apply_filters( 'avca_script_data', $data, $settings );
}

/**
 * Register front-end assets.
 */
function avca_register_assets() {
	wp_register_style( 'avca-frontend', AVCA_URL . 'assets/css/frontend.css', array(), AVCA_VERSION );
	wp_register_script( 'avca-frontend', AVCA_URL . 'assets/js/frontend.js', array(), AVCA_VERSION, true );
}
add_action( 'wp_enqueue_scripts', 'avca_register_assets', 5 );

/**
 * Enqueue front-end assets once.
 */
function avca_enqueue_assets() {
	static $done = false;

	if ( $done ) {
		return;
	}
	$done = true;

	if ( ! wp_script_is( 'avca-frontend', 'registered' ) ) {
		avca_register_assets();
	}

	wp_enqueue_style( 'avca-frontend' );
	wp_enqueue_script( 'avca-frontend' );
	wp_add_inline_script( 'avca-frontend', 'var avcaData = ' . wp_json_encode( avca_get_script_data() ) . ';', 'before' );
}

/**
 * Enqueue assets when the floating widget will be shown.
 */
function avca_maybe_enqueue_assets() {
	if ( avca_should_display() ) {
		avca_enqueue_assets();
	}
}
add_action( 'wp_enqueue_scripts', 'avca_maybe_enqueue_assets' );

/**
 * Default robot mascot SVG (original artwork).
 *
 * @return string
 */
function avca_get_robot_svg() {
	return '<svg viewBox="0 0 96 96" aria-hidden="true" focusable="false">'
		. '<line x1="48" y1="10" x2="48" y2="20" stroke="#94a3b8" stroke-width="3.5" stroke-linecap="round"/>'
		. '<circle cx="48" cy="9" r="5" fill="#38bdf8"/>'
		. '<rect x="8" y="34" width="10" height="20" rx="5" fill="#3b82f6"/>'
		. '<rect x="78" y="34" width="10" height="20" rx="5" fill="#3b82f6"/>'
		. '<rect x="14" y="20" width="68" height="50" rx="22" fill="#f8fafc" stroke="#cbd5e1" stroke-width="2.5"/>'
		. '<rect x="23" y="29" width="50" height="31" rx="15.5" fill="#1e293b"/>'
		. '<path d="M32 47q5-7 10 0M54 47q5-7 10 0" stroke="#5eead4" stroke-width="3.6" fill="none" stroke-linecap="round"/>'
		. '<rect x="32" y="72" width="32" height="18" rx="9" fill="#bfdbfe" stroke="#93c5fd" stroke-width="2"/>'
		. '<circle cx="48" cy="81" r="4" fill="#3b82f6"/>'
		. '</svg>';
}

/**
 * Chat bubble icon SVG.
 *
 * @return string
 */
function avca_get_chat_svg() {
	return '<svg viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path fill="currentColor" d="M12 3C6.48 3 2 6.94 2 11.8c0 2.4 1.1 4.58 2.88 6.17L4 21.5l4.1-1.73c1.2.36 2.51.55 3.9.55 5.52 0 10-3.94 10-8.8S17.52 3 12 3zm-4 10a1.25 1.25 0 1 1 0-2.5A1.25 1.25 0 0 1 8 13zm4 0a1.25 1.25 0 1 1 0-2.5A1.25 1.25 0 0 1 12 13zm4 0a1.25 1.25 0 1 1 0-2.5A1.25 1.25 0 0 1 16 13z"/></svg>';
}

/**
 * Allowed HTML for icons.
 *
 * @return array
 */
function avca_icon_allowed_html() {
	$shape = array(
		'fill'            => true,
		'stroke'          => true,
		'stroke-width'    => true,
		'stroke-linecap'  => true,
		'stroke-linejoin' => true,
	);

	return array(
		'img'    => array(
			'src' => true,
			'alt' => true,
		),
		'svg'    => array(
			'viewbox'     => true,
			'aria-hidden' => true,
			'focusable'   => true,
		),
		'line'   => array_merge(
			$shape,
			array(
				'x1' => true,
				'y1' => true,
				'x2' => true,
				'y2' => true,
			)
		),
		'circle' => array_merge(
			$shape,
			array(
				'cx' => true,
				'cy' => true,
				'r'  => true,
			)
		),
		'rect'   => array_merge(
			$shape,
			array(
				'x'      => true,
				'y'      => true,
				'width'  => true,
				'height' => true,
				'rx'     => true,
			)
		),
		'path'   => array_merge( $shape, array( 'd' => true ) ),
	);
}

/**
 * Echo an icon safely.
 *
 * @param string $html Icon markup.
 */
function avca_echo_icon( $html ) {
	echo wp_kses( $html, avca_icon_allowed_html() );
}

/**
 * Bot icon markup: uploaded image if set, otherwise the built-in robot.
 *
 * @param array $settings Plugin settings.
 * @return string
 */
function avca_get_bot_icon_html( $settings ) {
	if ( '' !== $settings['bot_icon'] ) {
		return '<img src="' . esc_url( $settings['bot_icon'] ) . '" alt="" />';
	}
	return avca_get_robot_svg();
}

/**
 * Render a chat instance.
 *
 * @param string $mode 'floating' or 'inline'.
 */
function avca_render_chat( $mode ) {
	static $instance = 0;
	++$instance;

	$settings = avca_get_settings();
	$defaults = avca_get_defaults();
	$floating = 'floating' === $mode;
	$label    = '' !== $settings['tooltip'] ? $settings['tooltip'] : $defaults['tooltip'];
	$bot_name = '' !== $settings['bot_name'] ? $settings['bot_name'] : $defaults['bot_name'];
	$color    = sanitize_hex_color( $settings['color'] );
	$color    = $color ? $color : $defaults['color'];
	$icon     = avca_get_bot_icon_html( $settings );
	$panel_id = 'avca-panel-' . $instance;
	$input_id = 'avca-input-' . $instance;

	$classes = array(
		'avca-root',
		'avca-root--' . $mode,
		'avca-theme-' . $settings['theme'],
	);

	if ( $floating ) {
		$classes[] = 'avca-pos-' . $settings['position'];
		$classes[] = 'avca-launcher-' . $settings['launcher'];
		$classes[] = 'avca-devices-' . $settings['devices'];
	}
	?>
	<div class="<?php echo esc_attr( implode( ' ', $classes ) ); ?>" data-avca-mode="<?php echo esc_attr( $mode ); ?>" style="<?php echo esc_attr( '--avca-color:' . $color ); ?>">
		<div class="avca-panel" id="<?php echo esc_attr( $panel_id ); ?>" role="<?php echo esc_attr( $floating ? 'dialog' : 'region' ); ?>" aria-label="<?php echo esc_attr( $bot_name ); ?>" <?php echo $floating ? 'hidden' : ''; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Static attribute. ?>>
			<div class="avca-header">
				<?php if ( $floating ) : ?>
					<button type="button" class="avca-back" aria-label="<?php esc_attr_e( 'Close chat', 'avi-support-assistant' ); ?>">
						<svg viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M15 5l-7 7 7 7"/></svg>
					</button>
				<?php endif; ?>
				<span class="avca-avatar"><?php avca_echo_icon( $icon ); ?></span>
				<span class="avca-title">
					<strong><?php echo esc_html( $bot_name ); ?></strong>
					<?php if ( '' !== $settings['subtitle'] ) : ?>
						<span><?php echo esc_html( $settings['subtitle'] ); ?></span>
					<?php endif; ?>
				</span>
			</div>
			<div class="avca-messages" aria-live="polite"></div>
			<form class="avca-form" novalidate>
				<label class="avca-sr-only" for="<?php echo esc_attr( $input_id ); ?>"><?php esc_html_e( 'Type your message', 'avi-support-assistant' ); ?></label>
				<input type="text" id="<?php echo esc_attr( $input_id ); ?>" class="avca-input" maxlength="300" autocomplete="off" placeholder="<?php esc_attr_e( 'Type your message and hit Enter', 'avi-support-assistant' ); ?>" />
				<button type="submit" class="avca-send" aria-label="<?php esc_attr_e( 'Send', 'avi-support-assistant' ); ?>">
					<svg viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M2.01 21 23 12 2.01 3 2 10l15 2-15 2z"/></svg>
				</button>
			</form>
		</div>
		<?php if ( $floating ) : ?>
			<button type="button" class="avca-button" aria-expanded="false" aria-controls="<?php echo esc_attr( $panel_id ); ?>" aria-label="<?php echo esc_attr( $label ); ?>">
				<span class="avca-launch-open">
					<?php if ( 'robot' === $settings['launcher'] ) : ?>
						<span class="avca-launch-bot"><?php avca_echo_icon( $icon ); ?></span>
					<?php else : ?>
						<span class="avca-launch-bubble"><?php avca_echo_icon( avca_get_chat_svg() ); ?></span>
						<?php if ( 'pill' === $settings['launcher'] ) : ?>
							<span class="avca-launch-text"><?php echo esc_html( $label ); ?></span>
						<?php endif; ?>
					<?php endif; ?>
				</span>
				<span class="avca-launch-close"><svg viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M6 6l12 12M18 6 6 18"/></svg></span>
				<?php if ( 'pill' !== $settings['launcher'] ) : ?>
					<span class="avca-tooltip" aria-hidden="true"><?php echo esc_html( $label ); ?></span>
				<?php endif; ?>
			</button>
		<?php endif; ?>
	</div>
	<?php
}

/**
 * Output the floating widget in the footer.
 */
function avca_render_widget() {
	if ( avca_should_display() ) {
		avca_render_chat( 'floating' );
	}
}
add_action( 'wp_footer', 'avca_render_widget' );

/**
 * [avi_support_assistant] shortcode: embeds the chat inside content.
 *
 * @return string
 */
function avca_shortcode() {
	if ( ! avca_get_setting( 'enabled' ) ) {
		return '';
	}

	avca_enqueue_assets();

	ob_start();
	avca_render_chat( 'inline' );
	return ob_get_clean();
}
add_shortcode( 'avi_support_assistant', 'avca_shortcode' );