<?php
/**
 * Frame of the Dealroot screens.
 *
 * @package Dealroot
 */

namespace Dealroot\Admin;

use Dealroot\Kses;
use Dealroot\Leads;
use Dealroot\Live;
use Dealroot\Site_Icons;
use Dealroot\Sources;

defined( 'ABSPATH' ) || exit;

/**
 * The bar with the screens of the plugin and the head of each screen.
 */
class Shell {

	/**
	 * Screens in the bar, in their order. Add-ons add theirs with the dealroot_admin_screens filter.
	 *
	 * @return array<string, array{label: string, page: string, capability: string, order: int}>
	 */
	public static function screens() {
		global $submenu;
		static $cache = null;

		if ( null !== $cache && did_action( 'admin_menu' ) ) {
			return $cache;
		}

		$screens = array(
			'overview' => array(
				'label'      => __( 'Overview', 'dealroot' ),
				'page'       => Admin::PAGE,
				'capability' => Admin::capability(),
				'order'      => 10,
			),
			'live'     => array(
				'label'      => __( 'Live', 'dealroot' ),
				'page'       => Live_Page::PAGE,
				'capability' => Admin::capability(),
				'order'      => 16,
				'live'       => Live::count(),
			),
			'leads'    => array(
				'label'      => __( 'Leads', 'dealroot' ),
				'page'       => Admin::LEADS_PAGE,
				'capability' => Admin::capability(),
				'order'      => 12,
				'count'      => Leads::status_counts()['new'],
			),
			'ask'      => array(
				'label'      => __( 'Ask', 'dealroot' ),
				'page'       => Ask_Page::PAGE,
				'capability' => Admin::capability(),
				'order'      => 27,
			),
			'reports'  => array(
				'label'      => __( 'Reports', 'dealroot' ),
				'page'       => Reports_Page::PAGE,
				'capability' => Admin::capability(),
				'order'      => 14,
			),
			'forms'    => array(
				'label'      => __( 'Forms', 'dealroot' ),
				'page'       => Forms_Page::PAGE,
				'capability' => 'manage_options',
				'order'      => 30,
			),
			'settings' => array(
				'label'      => __( 'Settings', 'dealroot' ),
				'page'       => Admin::SETTINGS_PAGE,
				'capability' => 'manage_options',
				'order'      => 90,
			),
		);

		/**
		 * Filters the screens shown in the bar of the Dealroot screens.
		 *
		 * @param array $screens Key => label, page (menu slug), capability, order and an optional count.
		 */
		$screens = (array) apply_filters( 'dealroot_admin_screens', $screens );

		// A screen that was taken out of the menu, e.g. for a white label, leaves the bar too.
		$menu = wp_list_pluck( (array) ( $submenu[ Admin::PAGE ] ?? array() ), 2 );

		$screens = array_filter(
			$screens,
			static function ( $screen ) use ( $menu ) {
				return ! empty( $screen['label'] ) && ! empty( $screen['page'] )
					&& ( ! $menu || in_array( $screen['page'], $menu, true ) )
					&& current_user_can( $screen['capability'] ?? 'manage_options' );
			}
		);

		uasort(
			$screens,
			static function ( $a, $b ) {
				return ( $a['order'] ?? 50 ) <=> ( $b['order'] ?? 50 );
			}
		);

		if ( did_action( 'admin_menu' ) ) {
			$cache = $screens;
		}

		return $screens;
	}

	/**
	 * Address of a screen.
	 *
	 * @param string $page Menu slug.
	 * @param array  $args Further query arguments.
	 * @return string
	 */
	public static function url( $page, array $args = array() ) {
		return add_query_arg( array_merge( array( 'page' => $page ), $args ), admin_url( 'admin.php' ) );
	}

	/**
	 * Opens a screen: the wrapper, the bar and the head with title, description and actions.
	 *
	 * @param string $current Key of the screen in the bar.
	 * @param string $title   Title.
	 * @param array  $args {
	 *     Optional.
	 *
	 *     @type string $description One or two sentences below the title.
	 *     @type string $actions     Buttons next to the title, as HTML.
	 *     @type array  $back        Link above the title: url and label.
	 *     @type string $media       HTML before the title, such as the initials of a person.
	 *     @type string $class       Further classes of the wrapper.
	 * }
	 */
	public static function open( $current, $title, array $args = array() ) {
		$args = wp_parse_args(
			$args,
			array(
				'description' => '',
				'actions'     => '',
				'back'        => array(),
				'media'       => '',
				'class'       => '',
			)
		);
		?>
		<div class="wrap dealroot-wrap dealroot-app <?php echo esc_attr( $args['class'] ); ?>">
			<?php self::bar( $current ); ?>
			<div class="dealroot-head<?php echo '' !== $args['media'] ? ' has-media' : ''; ?>">
				<?php if ( '' !== $args['media'] ) : ?>
					<div class="dealroot-head__media"><?php echo wp_kses( $args['media'], Kses::screen() ); ?></div>
				<?php endif; ?>
				<div class="dealroot-head__text">
					<?php if ( ! empty( $args['back']['url'] ) ) : ?>
						<a class="dealroot-head__back" href="<?php echo esc_url( $args['back']['url'] ); ?>">
							<svg width="14" height="14" viewBox="0 0 16 16" aria-hidden="true" focusable="false"><path d="<?php echo is_rtl() ? 'M6 3l5 5-5 5' : 'M10 3L5 8l5 5'; ?>" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/></svg>
							<?php echo esc_html( $args['back']['label'] ); ?>
						</a>
					<?php endif; ?>
					<h1><?php echo esc_html( $title ); ?></h1>
					<?php if ( '' !== $args['description'] ) : ?>
						<p class="dealroot-head__description"><?php echo esc_html( $args['description'] ); ?></p>
					<?php endif; ?>
				</div>
				<?php if ( '' !== $args['actions'] ) : ?>
					<div class="dealroot-head__actions">
						<?php echo wp_kses( $args['actions'], Kses::screen() ); ?>
					</div>
				<?php endif; ?>
			</div>
			<hr class="wp-header-end">
		<?php
	}

	/**
	 * Closes the wrapper opened by open().
	 */
	public static function close() {
		echo '</div>';
	}

	/**
	 * The bar with the brand and the screens.
	 *
	 * @param string $current Key of the screen.
	 */
	public static function bar( $current ) {
		/**
		 * Filters whether the Dealroot mark is shown in the bar, e.g. off for a white label.
		 *
		 * @param bool $show Show the mark.
		 */
		$mark = (bool) apply_filters( 'dealroot_brand_mark', true );
		?>
		<nav class="dealroot-appbar" aria-label="<?php esc_attr_e( 'Dealroot', 'dealroot' ); ?>">
			<a class="dealroot-appbar__brand" href="<?php echo esc_url( admin_url( 'admin.php?page=' . Admin::PAGE ) ); ?>">
				<?php if ( $mark ) : ?>
					<svg class="dealroot-appbar__mark" viewBox="0 0 32 32" width="26" height="26" aria-hidden="true" focusable="false">
						<rect width="32" height="32" rx="8" fill="#fff" fill-opacity=".12"/>
						<path d="M8 21.5c4.5 0 6-11 10.5-11 2.4 0 3.6 2.2 4 4.4" fill="none" stroke="#f4f6f2" stroke-width="2.6" stroke-linecap="round"/>
						<circle cx="23" cy="21" r="3.2" fill="#ffd23f"/>
					</svg>
				<?php endif; ?>
				<span><?php esc_html_e( 'Dealroot', 'dealroot' ); ?></span>
			</a>
			<ul class="dealroot-appbar__screens">
				<?php foreach ( self::screens() as $key => $screen ) : ?>
					<li>
						<a href="<?php echo esc_url( self::url( $screen['page'] ) ); ?>"<?php echo $key === $current ? ' class="is-current" aria-current="page"' : ''; ?>>
							<?php echo esc_html( $screen['label'] ); ?>
							<?php if ( isset( $screen['live'] ) && $screen['live'] > 0 ) : ?>
								<span class="dealroot-appbar__live"><?php echo esc_html( number_format_i18n( (int) $screen['live'] ) ); ?></span>
							<?php endif; ?>
							<?php if ( ! empty( $screen['count'] ) ) : ?>
								<span class="dealroot-appbar__count"><?php echo esc_html( number_format_i18n( (int) $screen['count'] ) ); ?></span>
							<?php endif; ?>
						</a>
					</li>
				<?php endforeach; ?>
			</ul>
		</nav>
		<?php
	}

	/**
	 * A link styled as a button.
	 *
	 * @param string $label   Label.
	 * @param string $url     Address.
	 * @param string $variant primary, secondary or quiet.
	 * @param array  $attrs   Further attributes.
	 * @return string HTML.
	 */
	public static function button( $label, $url, $variant = 'secondary', array $attrs = array() ) {
		$classes = trim( 'dealroot-button dealroot-button--' . $variant . ' ' . ( $attrs['class'] ?? '' ) );
		$html    = '';

		unset( $attrs['class'] );
		foreach ( $attrs as $name => $value ) {
			$html .= ' ' . esc_attr( $name ) . '="' . esc_attr( $value ) . '"';
		}

		return sprintf(
			'<a class="%1$s" href="%2$s"%3$s>%4$s</a>',
			esc_attr( $classes ),
			esc_url( $url ),
			$html,
			esc_html( $label )
		);
	}

	/**
	 * Dialog that asks for the amount when a lead is marked as won.
	 */
	public static function won_dialog() {
		?>
		<dialog class="dealroot-dialog" id="dealroot-won" aria-labelledby="dealroot-won-title">
			<form method="dialog">
				<h2 id="dealroot-won-title"><?php esc_html_e( 'Mark as won', 'dealroot' ); ?></h2>
				<p><?php esc_html_e( 'Enter the amount of the deal. It counts in your revenue and can be reported to your ad platforms. You can add it later, too.', 'dealroot' ); ?></p>
				<label for="dealroot-won-value"><?php esc_html_e( 'Deal value', 'dealroot' ); ?></label>
				<span class="dealroot-money">
					<input type="text" inputmode="decimal" id="dealroot-won-value" autocomplete="off" placeholder="0">
					<input type="text" class="dealroot-money__currency" id="dealroot-won-currency" readonly tabindex="-1" aria-label="<?php esc_attr_e( 'Currency', 'dealroot' ); ?>" value="<?php echo esc_attr( \Dealroot\Settings::get( 'currency' ) ); ?>">
				</span>
				<div class="dealroot-dialog__actions">
					<button type="submit" value="cancel" class="dealroot-button" formnovalidate><?php esc_html_e( 'Cancel', 'dealroot' ); ?></button>
					<button type="submit" value="save" class="dealroot-button dealroot-button--primary"><?php esc_html_e( 'Mark as won', 'dealroot' ); ?></button>
				</div>
			</form>
		</dialog>
		<?php
	}

	/**
	 * Round badge with the initials of a person.
	 *
	 * @param string $name  Name or email address.
	 * @param string $extra Further class, e.g. dealroot-avatar--large.
	 * @return string HTML.
	 */
	public static function avatar( $name, $extra = '' ) {
		return sprintf(
			'<span class="dealroot-avatar dealroot-avatar--%1$d %2$s" aria-hidden="true">%3$s</span>',
			self::tone( $name ),
			esc_attr( $extra ),
			esc_html( self::initials( $name ) )
		);
	}

	/**
	 * Initials of a name for the round badges.
	 *
	 * @param string $name Name or email address.
	 * @return string
	 */
	public static function initials( $name ) {
		$name  = trim( preg_replace( '/@.*$/', '', (string) $name ) );
		$parts = array_values( array_filter( preg_split( '/[\s._-]+/u', $name ) ) );

		if ( ! $parts ) {
			return '?';
		}

		$first = mb_substr( $parts[0], 0, 1 );
		$last  = count( $parts ) > 1 ? mb_substr( end( $parts ), 0, 1 ) : '';

		return mb_strtoupper( $first . $last );
	}

	/**
	 * Hue for the badge of a name, so the same person keeps the same colour.
	 *
	 * @param string $name Name.
	 * @return int 0 to 5.
	 */
	public static function tone( $name ) {
		return abs( crc32( (string) $name ) ) % 6;
	}

	/**
	 * Small square with the icon of a source's website, or its first letter.
	 *
	 * @param string $key  Source, output of Sources::key().
	 * @param bool   $lazy Leave a cached icon to the script, for rows that are not shown yet.
	 * @return string HTML.
	 */
	public static function source_icon( $key, $lazy = false ) {
		$kind = Sources::kind( $key );

		if ( 'direct' === $kind ) {
			return '<span class="dealroot-source-icon dealroot-source-icon--direct" aria-hidden="true"><svg width="12" height="12" viewBox="0 0 12 12"><path d="M2 6h7.5M6.5 2.8 9.7 6 6.5 9.2" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round"/></svg></span>';
		}

		if ( 'none' === $kind ) {
			return '<span class="dealroot-source-icon dealroot-source-icon--none" aria-hidden="true"></span>';
		}

		$label  = Sources::label( $key );
		$host   = Sources::domain( $key );
		$letter = mb_strtoupper( mb_substr( (string) preg_replace( '/^[^\p{L}\p{N}]+/u', '', $label ), 0, 1 ) );
		$icon   = '' !== $host && Site_Icons::enabled() ? Site_Icons::cached( $host ) : null;

		// A cached icon goes in a data attribute and the script paints it: wp_kses() takes data
		// URIs out of style attributes, and the letter stays if the image cannot be shown.
		if ( is_string( $icon ) && '' !== $icon && ! $lazy ) {
			$data = ' data-dealroot-image="' . esc_attr( $icon ) . '"';
		} elseif ( '' !== $host && '' !== $icon ) {
			$data = ' data-dealroot-icon="' . esc_attr( $host ) . '"';
		} else {
			$data = '';
		}

		return sprintf(
			'<span class="dealroot-source-icon dealroot-avatar--%1$d"%2$s aria-hidden="true">%3$s</span>',
			self::tone( $label ),
			$data,
			esc_html( '' !== $letter ? $letter : '?' )
		);
	}
}