<?php
namespace AFAMT;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

final class Settings {
	/** @var Settings|null */
	private static $instance = null;

	/** @var string */
	private $option_name;

	private function __construct( string $option_name ) {
		$this->option_name = $option_name;
	}

	public static function instance( string $option_name ) : Settings {
		if ( null === self::$instance ) {
			self::$instance = new self( $option_name );
		}
		return self::$instance;
	}

	public function init() : void {
		add_action( 'admin_menu', array( $this, 'register_menu' ) );
		add_action( 'admin_init', array( $this, 'register_settings' ) );
	}

	public function register_menu() : void {
		add_options_page(
			__( 'Admin Management Toolkit', 'adminforge-admin-management-toolkit' ),
			__( 'Admin Management Toolkit', 'adminforge-admin-management-toolkit' ),
			'manage_options',
			'afamt',
			array( $this, 'render_page' )
		);
	}

	public function register_settings() : void {
		register_setting(
			'afamt',
			$this->option_name,
			array(
				'type'              => 'array',
				'sanitize_callback' => array( $this, 'sanitize' ),
				'default'           => array(),
			)
		);
	}

	private function get_roles() : array {
		global $wp_roles;
		if ( ! $wp_roles ) {
			$wp_roles = wp_roles();
		}
		return (array) $wp_roles->roles;
	}

	private function current_menu_slugs() : array {
		// Must be called after core/admin menus are built.
		global $menu;

		$out = array();
		if ( ! is_array( $menu ) ) {
			return $out;
		}

		foreach ( $menu as $item ) {
			// $item[2] is the slug.
			if ( isset( $item[2] ) && is_string( $item[2] ) && '' !== $item[2] ) {
				$out[] = $item[2];
			}
		}

		$out = array_values( array_unique( $out ) );
		sort( $out );
		return $out;
	}

	public function sanitize( $raw ) : array {
		$raw = is_array( $raw ) ? $raw : array();

		$clean = get_option( $this->option_name, array() );
		$clean = is_array( $clean ) ? $clean : array();

		$roles = array_keys( $this->get_roles() );

		// Menu control.
		$clean['menu_hidden'] = array();
		if ( isset( $raw['menu_hidden'] ) && is_array( $raw['menu_hidden'] ) ) {
			foreach ( $raw['menu_hidden'] as $role => $slugs ) {
				if ( ! in_array( $role, $roles, true ) ) {
					continue;
				}
				$slugs = is_array( $slugs ) ? $slugs : array();
				$slugs = array_map( 'sanitize_text_field', $slugs );
				$slugs = array_values( array_filter( array_unique( $slugs ) ) );
				$clean['menu_hidden'][ $role ] = $slugs;
			}
		}

		// Dashboard widgets.
		$clean['dashboard_widgets_hidden'] = array();
		if ( isset( $raw['dashboard_widgets_hidden'] ) && is_array( $raw['dashboard_widgets_hidden'] ) ) {
			foreach ( $raw['dashboard_widgets_hidden'] as $role => $ids ) {
				if ( ! in_array( $role, $roles, true ) ) {
					continue;
				}
				$ids = is_array( $ids ) ? $ids : array();
				$ids = array_map( 'sanitize_text_field', $ids );
				$ids = array_values( array_filter( array_unique( $ids ) ) );
				$clean['dashboard_widgets_hidden'][ $role ] = $ids;
			}
		}

		// UI.
		$clean['ui']                       = isset( $clean['ui'] ) && is_array( $clean['ui'] ) ? $clean['ui'] : array();
		$clean['ui']['custom_footer_text'] = isset( $raw['ui']['custom_footer_text'] ) ? wp_kses_post( $raw['ui']['custom_footer_text'] ) : '';
		$clean['ui']['hide_admin_bar']     = array();
		if ( isset( $raw['ui']['hide_admin_bar'] ) && is_array( $raw['ui']['hide_admin_bar'] ) ) {
			foreach ( $raw['ui']['hide_admin_bar'] as $role => $on ) {
				if ( ! in_array( $role, $roles, true ) ) {
					continue;
				}
				$clean['ui']['hide_admin_bar'][ $role ] = (bool) $on;
			}
		}

		return $clean;
	}

	public function render_page() : void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$options = get_option( $this->option_name, array() );
		$options = is_array( $options ) ? $options : array();

		$roles      = $this->get_roles();
		$menu_slugs = $this->current_menu_slugs();

		$tab = isset( $_GET['tab'] ) ? sanitize_key( $_GET['tab'] ) : 'menu';
		$tabs = array(
			'menu'        => __( 'Admin menu control', 'adminforge-admin-management-toolkit' ),
			'dashboard'   => __( 'Dashboard widgets', 'adminforge-admin-management-toolkit' ),
			'ui'          => __( 'Admin UI customization', 'adminforge-admin-management-toolkit' ),
		);
		if ( ! isset( $tabs[ $tab ] ) ) {
			$tab = 'menu';
		}

		echo '<div class="wrap">';
		echo '<h1>' . esc_html__( 'Admin Management Toolkit', 'adminforge-admin-management-toolkit' ) . '</h1>';

		echo '<nav class="nav-tab-wrapper" style="margin-bottom:12px;">';
		foreach ( $tabs as $key => $label ) {
			$url = add_query_arg(
				array(
					'page' => 'afamt',
					'tab'  => $key,
				),
				admin_url( 'options-general.php' )
			);
			$classes = 'nav-tab' . ( $tab === $key ? ' nav-tab-active' : '' );
			echo '<a class="' . esc_attr( $classes ) . '" href="' . esc_url( $url ) . '">' . esc_html( $label ) . '</a>';
		}
		echo '</nav>';

		echo '<form method="post" action="options.php">';
		settings_fields( 'afamt' );

		switch ( $tab ) {
			case 'dashboard':
				$this->render_dashboard_tab( $roles, $options );
				break;
			case 'ui':
				$this->render_ui_tab( $roles, $options );
				break;
			case 'menu':
			default:
				$this->render_menu_tab( $roles, $menu_slugs, $options );
				break;
		}

		submit_button();
		echo '</form>';
		echo '</div>';
	}

	private function render_menu_tab( array $roles, array $menu_slugs, array $options ) : void {
		echo '<p>' . esc_html__( 'Hide admin menu items per role. This is applied for users who have that role.', 'adminforge-admin-management-toolkit' ) . '</p>';

		echo '<table class="widefat striped" style="max-width:1100px;">';
		echo '<thead><tr><th>' . esc_html__( 'Role', 'adminforge-admin-management-toolkit' ) . '</th><th>' . esc_html__( 'Hidden menu slugs', 'adminforge-admin-management-toolkit' ) . '</th></tr></thead>';
		echo '<tbody>';
		foreach ( $roles as $role_key => $role_data ) {
			$hidden = isset( $options['menu_hidden'][ $role_key ] ) && is_array( $options['menu_hidden'][ $role_key ] )
				? $options['menu_hidden'][ $role_key ]
				: array();
			echo '<tr>';
			echo '<td style="width:220px;"><strong>' . esc_html( $role_data['name'] ) . '</strong><br><code>' . esc_html( $role_key ) . '</code></td>';
			echo '<td>';
			echo '<div style="display:flex;flex-wrap:wrap;gap:10px;max-height:240px;overflow:auto;padding:8px;border:1px solid #dcdcde;border-radius:4px;background:#fff;">';
			foreach ( $menu_slugs as $slug ) {
				$checked = in_array( $slug, $hidden, true );
				echo '<label style="min-width:240px;">';
				echo '<input type="checkbox" name="' . esc_attr( $this->option_name ) . '[menu_hidden][' . esc_attr( $role_key ) . '][]"' . ' value="' . esc_attr( $slug ) . '"' . checked( $checked, true, false ) . ' /> ';
				echo '<code>' . esc_html( $slug ) . '</code>';
				echo '</label>';
			}
			echo '</div>';
			echo '<p class="description" style="margin:6px 0 0;">' . esc_html__( 'Tip: if a plugin menu isn’t listed yet, visit any admin page once, then reload this tab.', 'adminforge-admin-management-toolkit' ) . '</p>';
			echo '</td>';
			echo '</tr>';
		}
		echo '</tbody></table>';
	}

	private function render_dashboard_tab( array $roles, array $options ) : void {
		$widgets = array(
			'dashboard_site_health'  => __( 'Site Health Status', 'adminforge-admin-management-toolkit' ),
			'dashboard_right_now'    => __( 'At a Glance', 'adminforge-admin-management-toolkit' ),
			'dashboard_activity'     => __( 'Activity', 'adminforge-admin-management-toolkit' ),
			'dashboard_quick_press'  => __( 'Quick Draft', 'adminforge-admin-management-toolkit' ),
			'dashboard_primary'      => __( 'WordPress Events and News', 'adminforge-admin-management-toolkit' ),
			'dashboard_recent_drafts'=> __( 'Recent Drafts', 'adminforge-admin-management-toolkit' ),
		);

		echo '<p>' . esc_html__( 'Disable built-in dashboard widgets per role.', 'adminforge-admin-management-toolkit' ) . '</p>';

		echo '<table class="widefat striped" style="max-width:1100px;">';
		echo '<thead><tr><th>' . esc_html__( 'Role', 'adminforge-admin-management-toolkit' ) . '</th><th>' . esc_html__( 'Hidden dashboard widgets', 'adminforge-admin-management-toolkit' ) . '</th></tr></thead>';
		echo '<tbody>';
		foreach ( $roles as $role_key => $role_data ) {
			$hidden = isset( $options['dashboard_widgets_hidden'][ $role_key ] ) && is_array( $options['dashboard_widgets_hidden'][ $role_key ] )
				? $options['dashboard_widgets_hidden'][ $role_key ]
				: array();
			echo '<tr>';
			echo '<td style="width:220px;"><strong>' . esc_html( $role_data['name'] ) . '</strong><br><code>' . esc_html( $role_key ) . '</code></td>';
			echo '<td>';
			foreach ( $widgets as $id => $label ) {
				$checked = in_array( $id, $hidden, true );
				echo '<label style="display:block;margin:4px 0;">';
				echo '<input type="checkbox" name="' . esc_attr( $this->option_name ) . '[dashboard_widgets_hidden][' . esc_attr( $role_key ) . '][]"' . ' value="' . esc_attr( $id ) . '"' . checked( $checked, true, false ) . ' /> ';
				echo esc_html( $label ) . ' <code style="opacity:.8;">' . esc_html( $id ) . '</code>';
				echo '</label>';
			}
			echo '<p class="description" style="margin:8px 0 0;">' . esc_html__( 'Note: plugin-added widgets may still appear; this tab focuses on core widgets.', 'adminforge-admin-management-toolkit' ) . '</p>';
			echo '</td>';
			echo '</tr>';
		}
		echo '</tbody></table>';
	}

	private function render_ui_tab( array $roles, array $options ) : void {
		$ui = isset( $options['ui'] ) && is_array( $options['ui'] ) ? $options['ui'] : array();
		$footer = isset( $ui['custom_footer_text'] ) ? (string) $ui['custom_footer_text'] : '';
		$hide_admin_bar = isset( $ui['hide_admin_bar'] ) && is_array( $ui['hide_admin_bar'] ) ? $ui['hide_admin_bar'] : array();

		echo '<p>' . esc_html__( 'Small admin UI customizations.', 'adminforge-admin-management-toolkit' ) . '</p>';

		echo '<table class="form-table" role="presentation" style="max-width:1100px;">';
		echo '<tr>';
		echo '<th scope="row"><label for="afamt_footer">' . esc_html__( 'Custom admin footer text', 'adminforge-admin-management-toolkit' ) . '</label></th>';
		echo '<td>';
		echo '<textarea id="afamt_footer" name="' . esc_attr( $this->option_name ) . '[ui][custom_footer_text]" rows="3" class="large-text">' . esc_textarea( $footer ) . '</textarea>';
		echo '<p class="description">' . esc_html__( 'Supports basic HTML. Leave empty to keep the default footer.', 'adminforge-admin-management-toolkit' ) . '</p>';
		echo '</td>';
		echo '</tr>';
		echo '</table>';

		echo '<h2 style="margin-top:20px;">' . esc_html__( 'Admin bar (front-end)', 'adminforge-admin-management-toolkit' ) . '</h2>';
		echo '<p>' . esc_html__( 'Hide the front-end admin bar for selected roles.', 'adminforge-admin-management-toolkit' ) . '</p>';
		echo '<div style="display:flex;flex-wrap:wrap;gap:14px;max-width:1100px;">';
		foreach ( $roles as $role_key => $role_data ) {
			$checked = ! empty( $hide_admin_bar[ $role_key ] );
			echo '<label style="min-width:260px;border:1px solid #dcdcde;border-radius:4px;padding:10px;background:#fff;">';
			echo '<input type="checkbox" name="' . esc_attr( $this->option_name ) . '[ui][hide_admin_bar][' . esc_attr( $role_key ) . ']" value="1"' . checked( $checked, true, false ) . ' /> ';
			echo '<strong>' . esc_html( $role_data['name'] ) . '</strong> <code style="opacity:.8;">' . esc_html( $role_key ) . '</code>';
			echo '</label>';
		}
		echo '</div>';
	}

}