<?php
/**
 * Admin settings registration and sanitization.
 *
 * @package Abientot
 */

namespace Abientot\Admin;

use Abientot\Notifications\EmailService;
use Abientot\Repositories\ServicesRepository;
use Abientot\Repositories\BookingLock;
use Abientot\Repositories\StatusesRepository;
use Abientot\Support\DateTimeHelper;

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

final class Settings {
	public const OPTION_NAME = 'abientot_settings';
	public const GROUP       = 'abientot_settings';

	/**
	 * Registers the settings option.
	 */
	public function register(): void {
		register_setting(
			self::GROUP,
			self::OPTION_NAME,
			array(
				'type'              => 'array',
				'sanitize_callback' => array( $this, 'sanitize' ),
				'default'           => self::defaults(),
				'show_in_rest'      => false,
			)
		);
	}

	/**
	 * Saves settings from Abientot admin forms.
	 */
	/** Form-configuration fields outside the settings array that extensions save on abientot_before_settings_save. */
	public const EXTENSION_FIELDS = array( 'abientot_resource_form_present', 'abientot_resource_form_category', 'abientot_resource_form_show_usage_time', 'abientot_waitlist_form_present', 'abientot_waitlist_form_enabled' );

	/**
	 * Tab context of the settings form being saved, set by save() after nonce verification.
	 * Other option updates (imports, upgrades) sanitize without it.
	 *
	 * @var array{active_tab:string,full_form:bool}|null
	 */
	private static ?array $form_context = null;

	public function save(): void {
		check_admin_referer( 'abientot_save_settings' );
		if ( ! current_user_can( 'abientot_manage_settings' ) ) {
			wp_die( esc_html__( 'You do not have permission to manage Abientot settings.', 'abientot' ), 403 );
		}

		BookingLock::require_configuration_lock();

		$input              = \Abientot\Support\Input::post( 'abientot_save_settings' );
		$previous_settings  = self::values();
		$form_id            = $input->has( 'abientot_form_id' ) ? \Abientot\Support\BookingForms::resolve( $input->text( 'abientot_form_id' ) ) : 0;
		$name               = $input->has( 'abientot_form_name' ) && ! $input->has_list( 'abientot_form_name' ) ? $input->text( 'abientot_form_name' ) : null;
		self::$form_context = array(
			'active_tab' => $input->key( 'abientot_settings_active_tab', 'general' ),
			'full_form'  => $input->filled( 'abientot_settings_full_form' ),
		);

		// An additional booking form is sanitized on top of that form's settings and stored on the form only.
		$filter = null;
		if ( $form_id > 0 ) {
			$base   = \Abientot\Support\BookingForms::settings( $form_id );
			$filter = static function () use ( $base ) {
				return $base;
			};
			add_filter( 'option_' . self::OPTION_NAME, $filter, 1000 );
		}
		if ( ! has_filter( 'sanitize_option_' . self::OPTION_NAME ) ) {
			$this->register();
		}
		try {
			// sanitize_option() runs the sanitize_callback registered in register(): every field gets its own sanitizer.
			$sanitized = sanitize_option( self::OPTION_NAME, isset( $_POST[ self::OPTION_NAME ] ) ? wp_unslash( $_POST[ self::OPTION_NAME ] ) : array() );
		} finally {
			if ( null !== $filter ) {
				remove_filter( 'option_' . self::OPTION_NAME, $filter, 1000 );
			}
		}
		$sanitized = is_array( $sanitized ) ? $sanitized : array();
		do_action( 'abientot_before_settings_save', $sanitized, $input->fields( self::EXTENSION_FIELDS ) );

		if ( $form_id > 0 ) {
			\Abientot\Support\BookingForms::save( $form_id, $sanitized, $name );
			wp_safe_redirect(
				add_query_arg(
					array(
						'page'             => 'abientot-form',
						'form'             => $form_id,
						'settings-updated' => 'true'
					),
					admin_url( 'admin.php' )
				)
			);
			exit;
		}
		if ( null !== $name ) {
			\Abientot\Support\BookingForms::rename( 0, $name );
		}

		update_option( self::OPTION_NAME, $sanitized, false );
		if ( ! get_settings_errors( self::OPTION_NAME ) ) {
			add_settings_error( self::OPTION_NAME, 'abientot_settings_saved', __( 'Settings saved.', 'abientot' ), 'updated' );
		}
		$this->sync_service_currency( (string) $previous_settings['currency'], (string) self::values()['currency'] );
		set_transient( 'settings_errors', get_settings_errors(), 30 );

		wp_safe_redirect( $this->settings_redirect_url( $input->key( 'abientot_settings_return_page' ) ) );
		exit;
	}

	/**
	 * Returns default settings for the free plugin.
	 *
	 * @return array<string,mixed>
	 */
	public static function defaults(): array {
		return array(
			'plugin_language'                     => '',
			'business_name'                       => get_bloginfo( 'name' ),
			'header_name_font'                    => 'serif',
			'header_name_style'                   => 'bold',
			'header_name_size'                    => 'large',
			'header_name_color'                   => '#131f29',
			'business_timezone'                   => wp_timezone_string(),
			'date_display_format'                 => 'wordpress',
			'time_display_format'                 => 'wordpress',
			'currency'                            => 'USD',
			'booking_min_notice_hours'            => 24,
			'booking_window_days'                 => 90,
			'booking_slot_interval_minutes'       => 30,
			'default_booking_status'              => 'pending',
			'match_customer_by_email'             => true,
			'match_customer_by_phone'             => true,
			'cancellation_cutoff_hours'           => 24,
			'rescheduling_cutoff_hours'           => 24,
			'admin_notification_email'            => get_option( 'admin_email' ),
			'email_from_name'                     => get_bloginfo( 'name' ),
			'email_from_address'                  => get_option( 'admin_email' ),
			'email_reply_to_address'              => get_option( 'admin_email' ),
			'email_customer_confirmation_enabled' => true,
			'email_customer_confirmed_enabled'    => true,
			'email_admin_new_booking_enabled'     => true,
			'email_customer_cancellation_enabled' => false,
			'email_customer_rescheduling_enabled' => false,
			'email_customer_completed_enabled'    => false,
			'email_show_credit'                   => false,
			'form_primary_color'                  => '#46c8b2',
			'form_background_color'               => '#ffffff',
			'form_background_opacity'             => 100,
			'form_text_color'                     => '#131f29',
			'form_font_family'                    => 'system',
			'form_density'                        => 'compact',
			'form_font_size'                      => 15,
			'form_auto_text_color'                => false,
			'form_shadow'                         => 'soft',
			'form_look'                           => '',
			'form_max_width'                      => 760,
			'form_padding'                        => 24,
			'form_container_border_radius'        => 24,
			'form_border_radius'                  => 16,
			'form_hours_border_radius'            => 12,
			'form_border_width'                   => 1,
			'form_border_color'                   => '#d6d9dd',
			'form_service_border_width'           => 1,
			'form_service_border_color_mode'      => 'custom',
			'form_service_border_color'           => '#d6d9dd',
			'form_service_background_color_mode'  => 'custom',
			'form_service_background_color'       => '#ffffff',
			'form_category_background_color'      => '#ffffff',
			'form_field_text_color'               => '#1f2933',
			'form_field_background_color'         => '#ffffff',
			'form_field_border_color'             => '#d6d9dd',
			'form_field_border_radius'            => 8,
			'form_field_border_width'             => 1,
			'form_service_layout'                 => 'list',
			'form_group_services'                 => false,
			'form_category_behavior'              => 'collapsed',
			'form_show_service_images'            => false,
			'form_show_category_images'           => false,
			'form_image_size'                     => 72,
			'form_image_radius'                   => 6,
			'form_image_border_width'             => 1,
			'form_image_fit'                      => 'cover',
			'form_show_map'                       => false,
			'form_map_height'                     => 220,
			'form_title'                          => __( 'Book an appointment', 'abientot' ),
			'form_intro'                          => __( 'Choose a service, pick an available time, and send your booking request.', 'abientot' ),
			'form_button_label'                   => __( 'Book now', 'abientot' ),
			'form_display_mode'                   => 'embedded',
			'confirmation_message'                => __( 'Thank you. Your booking request has been received.', 'abientot' ),
			'form_fields'                         => self::default_form_fields(),
			'require_policy_checkbox'             => false,
			'booking_terms'                       => '',
			'policy_checkbox_text'                => __( 'I agree to the booking terms.', 'abientot' ),
			'privacy_controller_name'             => '',
			'privacy_contact'                     => '',
			'privacy_policy_url'                  => '',
			'privacy_retention_statement'         => '',
			'privacy_recipients'                  => '',
			'default_payment_status'              => 'unpaid',
			'pay_on_site_enabled'                 => true,
			'payment_instructions'                => __( 'Please pay on site at your appointment.', 'abientot' ),
			'delete_data_on_uninstall'            => false,
			'debug_mode'                          => false,
		) + self::email_template_defaults();
	}

	/**
	 * Returns settings merged with current defaults.
	 *
	 * @return array<string,mixed>
	 */
	/**
	 * Choices for the business name shown in the admin header.
	 *
	 * @return array<string,array<string,string>>
	 */
	public static function header_name_choices(): array {
		return array(
			'font'  => array(
				'system'  => __( 'Modern system', 'abientot' ),
				'serif'   => __( 'Editorial serif', 'abientot' ),
				'rounded' => __( 'Friendly rounded', 'abientot' ),
				'mono'    => __( 'Technical mono', 'abientot' ),
				'script'  => __( 'Elegant script', 'abientot' ),
			),
			'style' => array(
				'bold'   => __( 'Bold', 'abientot' ),
				'italic' => __( 'Elegant italic', 'abientot' ),
				'caps'   => __( 'Spaced capitals', 'abientot' ),
				'light'  => __( 'Light', 'abientot' ),
			),
			'size'  => array(
				'medium' => __( 'Medium', 'abientot' ),
				'large'  => __( 'Large', 'abientot' ),
				'xlarge' => __( 'Extra large', 'abientot' ),
			),
		);
	}

	/**
	 * @param array<string,mixed> $input    Raw input.
	 * @param array<string,mixed> $settings Settings being saved.
	 * @return array<string,mixed>
	 */
	private static function sanitize_header_name( array $input, array $settings ): array {
		$defaults = self::defaults();
		foreach ( self::header_name_choices() as $part => $choices ) {
			$key = 'header_name_' . $part;
			if ( array_key_exists( $key, $input ) ) {
				$value            = is_string( $input[ $key ] ) ? $input[ $key ] : '';
				$settings[ $key ] = isset( $choices[ $value ] ) ? $value : $defaults[ $key ];
			}
		}
		if ( array_key_exists( 'header_name_color', $input ) ) {
			$settings['header_name_color'] = sanitize_hex_color( is_string( $input['header_name_color'] ) ? $input['header_name_color'] : '' ) ?: $defaults['header_name_color'];
		}
		return $settings;
	}

	public static function values(): array {
		$settings = get_option( self::OPTION_NAME, array() );

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

		foreach ( EmailService::legacy_template_body_defaults() as $template_key => $legacy_body ) {
			$body_key = 'email_' . $template_key . '_body';
			if ( isset( $settings[ $body_key ] ) && $legacy_body === $settings[ $body_key ] ) {
				$settings[ $body_key ] = EmailService::template_body_defaults()[ $template_key ];
			}
		}

		return array_merge( self::defaults(), $settings );
	}

	/**
	 * Returns the default public booking detail fields.
	 *
	 * @return array<int,array<string,mixed>>
	 */
	public static function default_form_fields(): array {
		return array(
			array(
				'key'      => 'first_name',
				'label'    => __( 'First name', 'abientot' ),
				'type'     => 'text',
				'required' => false
			),
			array(
				'key'      => 'last_name',
				'label'    => __( 'Last name', 'abientot' ),
				'type'     => 'text',
				'required' => false
			),
			array(
				'key'      => 'email',
				'label'    => __( 'Email', 'abientot' ),
				'type'     => 'email',
				'required' => true
			),
			array(
				'key'      => 'phone',
				'label'    => __( 'Phone', 'abientot' ),
				'type'     => 'tel',
				'required' => false
			),
			array(
				'key'      => 'customer_note',
				'label'    => __( 'Note', 'abientot' ),
				'type'     => 'textarea',
				'required' => false
			),
		);
	}

	/**
	 * Returns saved public booking detail fields with stable keys and safe labels.
	 *
	 * @param mixed $fields Raw field list.
	 * @return array<int,array<string,mixed>>
	 */
	public static function normalize_form_fields( $fields ): array {
		if ( ! is_array( $fields ) ) {
			return self::default_form_fields();
		}

		$normalized = array();
		$seen       = array();
		$types      = array( 'text', 'email', 'tel', 'textarea', 'checkbox' );

		foreach ( $fields as $index => $field ) {
			if ( ! is_array( $field ) ) {
				continue;
			}

			$key = isset( $field['key'] ) ? sanitize_key( (string) $field['key'] ) : '';
			if ( '' === $key || '_abientot_policy' === $key ) {
				$key = 'custom_' . absint( $index );
			}
			if ( isset( $seen[ $key ] ) ) {
				$key .= '_' . absint( $index );
			}

			$label = isset( $field['label'] ) ? sanitize_text_field( (string) $field['label'] ) : '';
			if ( '' === $label ) {
				continue;
			}

			$type = isset( $field['type'] ) ? sanitize_key( (string) $field['type'] ) : 'text';
			if ( ! in_array( $type, $types, true ) ) {
				$type = 'text';
			}

			$seen[ $key ] = true;
			$normalized[] = array(
				'key'      => $key,
				'label'    => $label,
				'type'     => $type,
				'required' => ! empty( $field['required'] ),
			);

			if ( count( $normalized ) >= 30 ) {
				break;
			}
		}

		return $normalized ? $normalized : self::default_form_fields();
	}

	/**
	 * Sanitizes settings before saving.
	 *
	 * @param mixed $input Raw option input.
	 * @return array<string,mixed>
	 */
	public function sanitize( $input ): array {
		BookingLock::require_configuration_lock();
		$previous     = self::values();
		$input        = is_array( $input ) ? $input : array();
		$active_tab   = self::$form_context['active_tab'] ?? 'general';
		$is_full_form = ! empty( self::$form_context['full_form'] );
		$settings     = $previous;

		if ( array_key_exists( 'plugin_language', $input ) ) {
			$settings['plugin_language'] = $this->sanitize_language( (string) $input['plugin_language'] );
		}

		if ( array_key_exists( 'business_name', $input ) ) {
			$settings['business_name'] = sanitize_text_field( $input['business_name'] );
		}
		$settings = self::sanitize_header_name( $input, $settings );

		foreach ( array( 'privacy_controller_name', 'privacy_contact', 'privacy_retention_statement', 'privacy_recipients' ) as $key ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = sanitize_textarea_field( is_string( $input[ $key ] ) ? $input[ $key ] : '' );
			}
		}
		if ( array_key_exists( 'privacy_policy_url', $input ) ) {
			$settings['privacy_policy_url'] = esc_url_raw( is_string( $input['privacy_policy_url'] ) ? $input['privacy_policy_url'] : '', array( 'http', 'https' ) );
		}

		if ( array_key_exists( 'business_timezone', $input ) ) {
			$settings['business_timezone'] = $this->sanitize_timezone( $input['business_timezone'] );
		}

		if ( array_key_exists( 'date_display_format', $input ) ) {
			$settings['date_display_format'] = $this->sanitize_choice( (string) $input['date_display_format'], array_keys( DateTimeHelper::date_format_choices() ), 'wordpress' );
		}

		if ( array_key_exists( 'time_display_format', $input ) ) {
			$settings['time_display_format'] = $this->sanitize_choice( (string) $input['time_display_format'], array_keys( DateTimeHelper::time_format_choices() ), 'wordpress' );
		}

		if ( array_key_exists( 'currency', $input ) ) {
			$settings['currency'] = $this->sanitize_currency( $input['currency'] );
			if ( $settings['currency'] !== self::values()['currency'] && ! $this->currency_prices_compatible( $settings['currency'] ) ) {
				add_settings_error( self::OPTION_NAME, 'currency_precision', __( 'Some saved service or option prices contain fractions. Adjust those prices before choosing a whole-unit currency.', 'abientot' ), 'error' );
				return self::values();
			}
		}

		if ( array_key_exists( 'booking_min_notice_hours', $input ) ) {
			$settings['booking_min_notice_hours'] = $this->sanitize_integer( $input['booking_min_notice_hours'], 0, 8760 );
		}

		if ( array_key_exists( 'booking_window_days', $input ) ) {
			$settings['booking_window_days'] = $this->sanitize_integer( $input['booking_window_days'], 1, 730 );
		}

		if ( array_key_exists( 'booking_slot_interval_minutes', $input ) ) {
			$settings['booking_slot_interval_minutes'] = $this->sanitize_integer( $input['booking_slot_interval_minutes'], 5, 240 );
		}

		if ( array_key_exists( 'default_booking_status', $input ) ) {
			$settings['default_booking_status'] = $this->sanitize_choice( $input['default_booking_status'], array( 'pending', 'confirmed' ), 'pending' );
		}

		if ( ! empty( $input['status_labels'] ) && is_array( $input['status_labels'] ) ) {
			$this->sanitize_status_labels( $input['status_labels'] );
		}

		if ( $is_full_form || 'customer-identity' === $active_tab ) {
			$settings['match_customer_by_email'] = ! empty( $input['match_customer_by_email'] );
			$settings['match_customer_by_phone'] = ! empty( $input['match_customer_by_phone'] );
		}

		if ( array_key_exists( 'cancellation_cutoff_hours', $input ) ) {
			$settings['cancellation_cutoff_hours'] = $this->sanitize_integer( $input['cancellation_cutoff_hours'], 0, 8760 );
		}

		if ( array_key_exists( 'rescheduling_cutoff_hours', $input ) ) {
			$settings['rescheduling_cutoff_hours'] = $this->sanitize_integer( $input['rescheduling_cutoff_hours'], 0, 8760 );
		}

		if ( array_key_exists( 'admin_notification_email', $input ) ) {
			$settings['admin_notification_email'] = sanitize_email( $input['admin_notification_email'] );
		}

		if ( array_key_exists( 'email_from_name', $input ) ) {
			$settings['email_from_name'] = sanitize_text_field( $input['email_from_name'] );
		}

		if ( array_key_exists( 'email_from_address', $input ) ) {
			$settings['email_from_address'] = sanitize_email( $input['email_from_address'] );
		}

		if ( array_key_exists( 'email_reply_to_address', $input ) ) {
			$settings['email_reply_to_address'] = sanitize_email( $input['email_reply_to_address'] );
		}

		if ( $is_full_form || 'communication' === $active_tab ) {
			$settings['email_show_credit'] = ! empty( $input['email_show_credit'] );
			foreach ( array_keys( EmailService::template_labels() ) as $template_key ) {
				$settings[ 'email_' . $template_key . '_enabled' ] = ! empty( $input[ 'email_' . $template_key . '_enabled' ] );

				if ( array_key_exists( 'email_' . $template_key . '_subject', $input ) ) {
					$settings[ 'email_' . $template_key . '_subject' ] = sanitize_text_field( $input[ 'email_' . $template_key . '_subject' ] );
				}

				if ( array_key_exists( 'email_' . $template_key . '_body', $input ) ) {
					$settings[ 'email_' . $template_key . '_body' ] = wp_kses_post( $input[ 'email_' . $template_key . '_body' ] );
				}
			}
		}

		if ( array_key_exists( 'form_primary_color', $input ) ) {
			$settings['form_primary_color'] = sanitize_hex_color( $input['form_primary_color'] ) ?: $previous['form_primary_color'];
		}

		if ( array_key_exists( 'form_background_color', $input ) ) {
			$settings['form_background_color'] = sanitize_hex_color( $input['form_background_color'] ) ?: $previous['form_background_color'];
		}

		if ( array_key_exists( 'form_background_opacity', $input ) ) {
			$settings['form_background_opacity'] = $this->sanitize_integer( $input['form_background_opacity'], 0, 100 );
		}

		if ( array_key_exists( 'form_text_color', $input ) ) {
			$settings['form_text_color'] = sanitize_hex_color( $input['form_text_color'] ) ?: $previous['form_text_color'];
		}

		if ( array_key_exists( 'form_border_color', $input ) ) {
			$settings['form_border_color'] = sanitize_hex_color( $input['form_border_color'] ) ?: $previous['form_border_color'];
		}

		if ( array_key_exists( 'form_service_border_color', $input ) ) {
			$settings['form_service_border_color'] = sanitize_hex_color( $input['form_service_border_color'] ) ?: $previous['form_service_border_color'];
		}

		if ( array_key_exists( 'form_service_background_color', $input ) ) {
			$settings['form_service_background_color'] = sanitize_hex_color( $input['form_service_background_color'] ) ?: $previous['form_service_background_color'];
		}

		if ( array_key_exists( 'form_category_background_color', $input ) ) {
			$settings['form_category_background_color'] = sanitize_hex_color( $input['form_category_background_color'] ) ?: $previous['form_category_background_color'];
		}

		if ( array_key_exists( 'form_field_text_color', $input ) ) {
			$settings['form_field_text_color'] = sanitize_hex_color( $input['form_field_text_color'] ) ?: $previous['form_field_text_color'];
		}

		if ( array_key_exists( 'form_field_background_color', $input ) ) {
			$settings['form_field_background_color'] = sanitize_hex_color( $input['form_field_background_color'] ) ?: $previous['form_field_background_color'];
		}

		if ( array_key_exists( 'form_field_border_color', $input ) ) {
			$settings['form_field_border_color'] = sanitize_hex_color( $input['form_field_border_color'] ) ?: $previous['form_field_border_color'];
		}

		if ( array_key_exists( 'form_font_family', $input ) ) {
			$settings['form_font_family'] = $this->sanitize_choice( (string) $input['form_font_family'], array( 'system', 'serif', 'mono', 'rounded' ), 'system' );
		}

		if ( array_key_exists( 'form_density', $input ) ) {
			$settings['form_density'] = $this->sanitize_choice( (string) $input['form_density'], array( 'compact', 'comfortable' ), 'compact' );
		}

		if ( array_key_exists( 'form_shadow', $input ) ) {
			$settings['form_shadow'] = $this->sanitize_choice( (string) $input['form_shadow'], array( 'none', 'soft', 'lifted' ), 'soft' );
		}

		if ( array_key_exists( 'form_look', $input ) ) {
			$look                  = sanitize_key( (string) $input['form_look'] );
			$settings['form_look'] = array_key_exists( $look, FormLooks::all() ) ? $look : '';
		}

		foreach ( array(
			'form_max_width'               => array( 360, 1400 ),
			'form_padding'                 => array( 8, 64 ),
			'form_font_size'               => array( 13, 19 ),
			'form_container_border_radius' => array( 0, 32 ),
			'form_border_radius'           => array( 0, 32 ),
			'form_hours_border_radius'     => array( 0, 32 ),
			'form_border_width'            => array( 0, 8 ),
			'form_service_border_width'    => array( 0, 8 ),
			'form_field_border_radius'     => array( 0, 32 ),
			'form_field_border_width'      => array( 0, 8 ),
			'form_image_size'              => array( 32, 240 ),
			'form_image_radius'            => array( 0, 48 ),
			'form_image_border_width'      => array( 0, 8 ),
			'form_map_height'              => array( 120, 520 ),
		) as $key => $bounds ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = $this->sanitize_integer( $input[ $key ], $bounds[0], $bounds[1] );
			}
		}

		if ( array_key_exists( 'form_service_layout', $input ) ) {
			$settings['form_service_layout'] = $this->sanitize_choice( (string) $input['form_service_layout'], array( 'list', 'grid', 'compact' ), 'list' );
		}

		if ( array_key_exists( 'form_service_border_color_mode', $input ) ) {
			$settings['form_service_border_color_mode'] = $this->sanitize_choice( (string) $input['form_service_border_color_mode'], array( 'service', 'custom' ), 'custom' );
		}

		if ( array_key_exists( 'form_service_background_color_mode', $input ) ) {
			$settings['form_service_background_color_mode'] = $this->sanitize_choice( (string) $input['form_service_background_color_mode'], array( 'service', 'custom' ), 'custom' );
		}

		if ( array_key_exists( 'form_category_behavior', $input ) ) {
			$settings['form_category_behavior'] = $this->sanitize_choice( (string) $input['form_category_behavior'], array( 'expanded', 'collapsed' ), 'collapsed' );
		}

		if ( array_key_exists( 'form_image_fit', $input ) ) {
			$settings['form_image_fit'] = $this->sanitize_choice( (string) $input['form_image_fit'], array( 'cover', 'contain' ), 'cover' );
		}

		if ( $is_full_form || 'form-frontend' === $active_tab ) {
			$settings['form_group_services']       = ! empty( $input['form_group_services'] );
			$settings['form_show_service_images']  = ! empty( $input['form_show_service_images'] );
			$settings['form_show_category_images'] = ! empty( $input['form_show_category_images'] );
			$settings['form_show_map']             = ! empty( $input['form_show_map'] );
			$settings['form_auto_text_color']      = ! empty( $input['form_auto_text_color'] );
		}

		if ( array_key_exists( 'form_title', $input ) ) {
			$settings['form_title'] = sanitize_text_field( $input['form_title'] );
		}

		if ( array_key_exists( 'form_intro', $input ) ) {
			$settings['form_intro'] = sanitize_textarea_field( $input['form_intro'] );
		}

		if ( array_key_exists( 'form_button_label', $input ) ) {
			$settings['form_button_label'] = sanitize_text_field( $input['form_button_label'] );
		}

		if ( array_key_exists( 'form_display_mode', $input ) ) {
			$settings['form_display_mode'] = $this->sanitize_choice( $input['form_display_mode'], array( 'embedded', 'popup' ), 'embedded' );
		}

		if ( array_key_exists( 'confirmation_message', $input ) ) {
			$settings['confirmation_message'] = sanitize_textarea_field( $input['confirmation_message'] );
		}

		if ( array_key_exists( 'booking_terms', $input ) ) {
			$settings['booking_terms'] = wp_kses_post( is_string( $input['booking_terms'] ) ? $input['booking_terms'] : '' );
		}

		if ( array_key_exists( 'form_fields', $input ) ) {
			$settings['form_fields'] = self::normalize_form_fields( $input['form_fields'] );
		}

		if ( 'form-frontend' === $active_tab || array_key_exists( 'require_policy_checkbox', $input ) ) {
			$settings['require_policy_checkbox'] = ! empty( $input['require_policy_checkbox'] );
		}

		if ( array_key_exists( 'policy_checkbox_text', $input ) ) {
			$settings['policy_checkbox_text'] = sanitize_text_field( $input['policy_checkbox_text'] );
		}

		if ( array_key_exists( 'default_payment_status', $input ) ) {
			$settings['default_payment_status'] = $this->sanitize_choice( $input['default_payment_status'], array( 'not_required', 'unpaid' ), 'unpaid' );
		}

		if ( array_key_exists( 'payment_instructions', $input ) ) {
			$settings['payment_instructions'] = sanitize_textarea_field( $input['payment_instructions'] );
		}
		if ( array_key_exists( 'pay_on_site_enabled', $input ) ) {
			$settings['pay_on_site_enabled'] = ! empty( $input['pay_on_site_enabled'] );
		}

		if ( $is_full_form || 'privacy-data' === $active_tab ) {
			$settings['delete_data_on_uninstall'] = ! empty( $input['delete_data_on_uninstall'] );
		}

		if ( $is_full_form || 'advanced' === $active_tab ) {
			$settings['debug_mode'] = ! empty( $input['debug_mode'] );
		}

		if ( empty( $settings['admin_notification_email'] ) ) {
			$settings['admin_notification_email'] = get_option( 'admin_email' );
		}

		if ( empty( $settings['email_from_address'] ) ) {
			$settings['email_from_address'] = get_option( 'admin_email' );
		}

		if ( empty( $settings['email_reply_to_address'] ) ) {
			$settings['email_reply_to_address'] = $settings['email_from_address'];
		}

		return $settings;
	}

	/**
	 * Sanitizes a complete settings import without relying on the active settings tab.
	 *
	 * @param array<string,mixed> $input Imported settings.
	 * @return array<string,mixed>
	 */
	public function sanitize_import( array $input ): array {
		BookingLock::require_configuration_lock();
		$settings = self::values();

		if ( array_key_exists( 'business_name', $input ) ) {
			$settings['business_name'] = sanitize_text_field( $input['business_name'] );
		}
		$settings = self::sanitize_header_name( $input, $settings );

		if ( array_key_exists( 'business_timezone', $input ) ) {
			$settings['business_timezone'] = $this->sanitize_timezone( (string) $input['business_timezone'] );
		}

		if ( array_key_exists( 'date_display_format', $input ) ) {
			$settings['date_display_format'] = $this->sanitize_choice( (string) $input['date_display_format'], array_keys( DateTimeHelper::date_format_choices() ), 'wordpress' );
		}

		if ( array_key_exists( 'time_display_format', $input ) ) {
			$settings['time_display_format'] = $this->sanitize_choice( (string) $input['time_display_format'], array_keys( DateTimeHelper::time_format_choices() ), 'wordpress' );
		}

		if ( array_key_exists( 'currency', $input ) ) {
			$settings['currency'] = $this->sanitize_currency( (string) $input['currency'] );
			if ( $settings['currency'] !== self::values()['currency'] && ! $this->currency_prices_compatible( $settings['currency'] ) ) {
				throw new \InvalidArgumentException( esc_html__( 'Some saved service or option prices contain fractions. Adjust those prices before choosing a whole-unit currency.', 'abientot' ) );
			}
		}

		foreach ( array(
			'booking_min_notice_hours'      => array( 0, 8760 ),
			'booking_window_days'           => array( 1, 730 ),
			'booking_slot_interval_minutes' => array( 5, 240 ),
			'cancellation_cutoff_hours'     => array( 0, 8760 ),
			'rescheduling_cutoff_hours'     => array( 0, 8760 ),
		) as $key => $bounds ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = $this->sanitize_integer( $input[ $key ], $bounds[0], $bounds[1] );
			}
		}

		foreach ( array(
			'match_customer_by_email',
			'pay_on_site_enabled',
			'match_customer_by_phone',
			'email_customer_confirmation_enabled',
			'email_admin_new_booking_enabled',
			'email_customer_cancellation_enabled',
			'email_customer_rescheduling_enabled',
			'email_customer_completed_enabled',
			'email_show_credit',
			'require_policy_checkbox',
			'form_group_services',
			'form_show_service_images',
			'form_show_category_images',
			'form_show_map',
			'form_auto_text_color',
			'delete_data_on_uninstall',
			'debug_mode',
		) as $key ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = ! empty( $input[ $key ] );
			}
		}

		if ( array_key_exists( 'default_booking_status', $input ) ) {
			$settings['default_booking_status'] = $this->sanitize_choice( (string) $input['default_booking_status'], array( 'pending', 'confirmed' ), 'pending' );
		}

		if ( array_key_exists( 'form_display_mode', $input ) ) {
			$settings['form_display_mode'] = $this->sanitize_choice( (string) $input['form_display_mode'], array( 'embedded', 'popup' ), 'embedded' );
		}

		if ( array_key_exists( 'form_service_layout', $input ) ) {
			$settings['form_service_layout'] = $this->sanitize_choice( (string) $input['form_service_layout'], array( 'list', 'grid', 'compact' ), 'list' );
		}

		if ( array_key_exists( 'form_service_border_color_mode', $input ) ) {
			$settings['form_service_border_color_mode'] = $this->sanitize_choice( (string) $input['form_service_border_color_mode'], array( 'service', 'custom' ), 'custom' );
		}

		if ( array_key_exists( 'form_service_background_color_mode', $input ) ) {
			$settings['form_service_background_color_mode'] = $this->sanitize_choice( (string) $input['form_service_background_color_mode'], array( 'service', 'custom' ), 'custom' );
		}

		if ( array_key_exists( 'form_category_behavior', $input ) ) {
			$settings['form_category_behavior'] = $this->sanitize_choice( (string) $input['form_category_behavior'], array( 'expanded', 'collapsed' ), 'collapsed' );
		}

		if ( array_key_exists( 'form_image_fit', $input ) ) {
			$settings['form_image_fit'] = $this->sanitize_choice( (string) $input['form_image_fit'], array( 'cover', 'contain' ), 'cover' );
		}

		if ( array_key_exists( 'form_border_color', $input ) ) {
			$settings['form_border_color'] = sanitize_hex_color( (string) $input['form_border_color'] ) ?: $settings['form_border_color'];
		}

		if ( array_key_exists( 'form_service_border_color', $input ) ) {
			$settings['form_service_border_color'] = sanitize_hex_color( (string) $input['form_service_border_color'] ) ?: $settings['form_service_border_color'];
		}

		if ( array_key_exists( 'form_service_background_color', $input ) ) {
			$settings['form_service_background_color'] = sanitize_hex_color( (string) $input['form_service_background_color'] ) ?: $settings['form_service_background_color'];
		}

		if ( array_key_exists( 'form_category_background_color', $input ) ) {
			$settings['form_category_background_color'] = sanitize_hex_color( (string) $input['form_category_background_color'] ) ?: $settings['form_category_background_color'];
		}

		if ( array_key_exists( 'form_field_text_color', $input ) ) {
			$settings['form_field_text_color'] = sanitize_hex_color( (string) $input['form_field_text_color'] ) ?: $settings['form_field_text_color'];
		}

		if ( array_key_exists( 'form_field_background_color', $input ) ) {
			$settings['form_field_background_color'] = sanitize_hex_color( (string) $input['form_field_background_color'] ) ?: $settings['form_field_background_color'];
		}

		if ( array_key_exists( 'form_field_border_color', $input ) ) {
			$settings['form_field_border_color'] = sanitize_hex_color( (string) $input['form_field_border_color'] ) ?: $settings['form_field_border_color'];
		}

		foreach ( array(
			'form_max_width'               => array( 360, 1400 ),
			'form_padding'                 => array( 8, 64 ),
			'form_font_size'               => array( 13, 19 ),
			'form_container_border_radius' => array( 0, 32 ),
			'form_border_radius'           => array( 0, 32 ),
			'form_hours_border_radius'     => array( 0, 32 ),
			'form_border_width'            => array( 0, 8 ),
			'form_service_border_width'    => array( 0, 8 ),
			'form_field_border_radius'     => array( 0, 32 ),
			'form_field_border_width'      => array( 0, 8 ),
			'form_image_size'              => array( 32, 240 ),
			'form_image_radius'            => array( 0, 48 ),
			'form_image_border_width'      => array( 0, 8 ),
			'form_map_height'              => array( 120, 520 ),
		) as $key => $bounds ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = $this->sanitize_integer( $input[ $key ], $bounds[0], $bounds[1] );
			}
		}

		if ( array_key_exists( 'default_payment_status', $input ) ) {
			$settings['default_payment_status'] = $this->sanitize_choice( (string) $input['default_payment_status'], array( 'not_required', 'unpaid' ), 'unpaid' );
		}

		foreach ( array( 'admin_notification_email', 'email_from_address', 'email_reply_to_address' ) as $key ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = sanitize_email( $input[ $key ] );
			}
		}

		foreach ( array( 'email_from_name', 'form_title', 'form_button_label', 'policy_checkbox_text' ) as $key ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = sanitize_text_field( $input[ $key ] );
			}
		}

		foreach ( array( 'form_intro', 'confirmation_message', 'payment_instructions' ) as $key ) {
			if ( array_key_exists( $key, $input ) ) {
				$settings[ $key ] = sanitize_textarea_field( $input[ $key ] );
			}
		}

		if ( array_key_exists( 'booking_terms', $input ) ) {
			$settings['booking_terms'] = wp_kses_post( is_string( $input['booking_terms'] ) ? $input['booking_terms'] : '' );
		}

		if ( array_key_exists( 'form_fields', $input ) ) {
			$settings['form_fields'] = self::normalize_form_fields( $input['form_fields'] );
		}

		if ( array_key_exists( 'form_primary_color', $input ) ) {
			$settings['form_primary_color'] = sanitize_hex_color( $input['form_primary_color'] ) ?: self::defaults()['form_primary_color'];
		}

		if ( array_key_exists( 'form_background_color', $input ) ) {
			$settings['form_background_color'] = sanitize_hex_color( $input['form_background_color'] ) ?: self::defaults()['form_background_color'];
		}

		if ( array_key_exists( 'form_background_opacity', $input ) ) {
			$settings['form_background_opacity'] = $this->sanitize_integer( $input['form_background_opacity'], 0, 100 );
		}

		if ( array_key_exists( 'form_text_color', $input ) ) {
			$settings['form_text_color'] = sanitize_hex_color( $input['form_text_color'] ) ?: self::defaults()['form_text_color'];
		}

		if ( array_key_exists( 'form_font_family', $input ) ) {
			$settings['form_font_family'] = $this->sanitize_choice( (string) $input['form_font_family'], array( 'system', 'serif', 'mono', 'rounded' ), 'system' );
		}

		if ( array_key_exists( 'form_density', $input ) ) {
			$settings['form_density'] = $this->sanitize_choice( (string) $input['form_density'], array( 'compact', 'comfortable' ), 'compact' );
		}

		if ( array_key_exists( 'form_shadow', $input ) ) {
			$settings['form_shadow'] = $this->sanitize_choice( (string) $input['form_shadow'], array( 'none', 'soft', 'lifted' ), 'soft' );
		}

		if ( array_key_exists( 'form_look', $input ) ) {
			$look                  = sanitize_key( (string) $input['form_look'] );
			$settings['form_look'] = array_key_exists( $look, FormLooks::all() ) ? $look : '';
		}

		foreach ( array_keys( EmailService::template_labels() ) as $template_key ) {
			$enabled_key = 'email_' . $template_key . '_enabled';
			$subject_key = 'email_' . $template_key . '_subject';
			$body_key    = 'email_' . $template_key . '_body';

			if ( array_key_exists( $enabled_key, $input ) ) {
				$settings[ $enabled_key ] = ! empty( $input[ $enabled_key ] );
			}

			if ( array_key_exists( $subject_key, $input ) ) {
				$settings[ $subject_key ] = sanitize_text_field( $input[ $subject_key ] );
			}

			if ( array_key_exists( $body_key, $input ) ) {
				$settings[ $body_key ] = wp_kses_post( $input[ $body_key ] );
			}
		}

		if ( empty( $settings['admin_notification_email'] ) ) {
			$settings['admin_notification_email'] = get_option( 'admin_email' );
		}

		if ( empty( $settings['email_from_address'] ) ) {
			$settings['email_from_address'] = get_option( 'admin_email' );
		}

		if ( empty( $settings['email_reply_to_address'] ) ) {
			$settings['email_reply_to_address'] = $settings['email_from_address'];
		}

		return $settings;
	}

	/**
	 * @return array<string,string>
	 */
	private static function email_template_defaults(): array {
		$defaults = array();

		foreach ( EmailService::template_subject_defaults() as $template_key => $subject ) {
			$defaults[ 'email_' . $template_key . '_subject' ] = $subject;
		}

		foreach ( EmailService::template_body_defaults() as $template_key => $body ) {
			$defaults[ 'email_' . $template_key . '_body' ] = $body;
		}

		return $defaults;
	}

	/**
	 * Languages bundled with the plugin. An empty value follows WordPress.
	 *
	 * @return array<string,string>
	 */
	public static function language_names(): array {
		// This registry is also read during gettext loading: native names must not
		// call gettext, or resolving the configured language would recurse.
		return array(
			'en_US' => 'English',
			'fr_FR' => 'Français',
			'pt_PT' => 'Português',
			'de_DE' => 'Deutsch',
			'es_ES' => 'Español',
			'it_IT' => 'Italiano',
			'pt_BR' => 'Português do Brasil',
			'ja'    => '日本語',
			'nl_NL' => 'Nederlands',
			'pl_PL' => 'Polski',
			'tr_TR' => 'Türkçe',
			'zh_CN' => '简体中文',
			'ko_KR' => '한국어',
			'id_ID' => 'Bahasa Indonesia',
			'ar'    => 'العربية',
			'sv_SE' => 'Svenska',
			'cs_CZ' => 'Čeština',
			'da_DK' => 'Dansk',
			'nb_NO' => 'Norsk bokmål',
			'vi'    => 'Tiếng Việt',
			'fi'    => 'Suomi',
			'ro_RO' => 'Română',
		);
	}

	public static function language_choices(): array {
		return array( '' => __( 'WordPress language (default)', 'abientot' ) ) + self::language_names();
	}

	public static function configured_locale(): string {
		$settings = get_option( self::OPTION_NAME, array() );
		$locale   = is_array( $settings ) && isset( $settings['plugin_language'] ) ? sanitize_text_field( (string) $settings['plugin_language'] ) : '';

		return isset( self::language_names()[ $locale ] ) ? $locale : '';
	}

	public static function template_language_label(): string {
		$locale = self::configured_locale();
		$locale = '' !== $locale ? $locale : get_locale();

		$names = self::language_names();
		if ( isset( $names[ $locale ] ) ) {
			return $names[ $locale ];
		}
		foreach ( $names as $code => $name ) {
			if ( strtok( $locale, '_-' ) === strtok( $code, '_-' ) ) {
				return $name;
			}
		}

		return 'English';
	}

	private function sanitize_timezone( string $timezone ): string {
		$timezone = sanitize_text_field( $timezone );

		return in_array( $timezone, timezone_identifiers_list(), true ) ? $timezone : wp_timezone_string();
	}

	private function sanitize_language( string $locale ): string {
		$locales = array();
		foreach ( array_keys( self::language_names() ) as $code ) {
			$locales[ strtolower( $code ) ] = $code;
		}
		$key = strtolower( sanitize_text_field( $locale ) );

		return $locales[ $key ] ?? '';
	}

	private function sanitize_currency( string $currency ): string {
		$currency = strtoupper( sanitize_text_field( $currency ) );

		return in_array( $currency, self::currency_codes(), true ) ? $currency : 'USD';
	}

	/**
	 * Returns the 179 selectable ISO 4217 currency and fund codes.
	 *
	 * The testing code (XTS) and no-currency code (XXX) are intentionally excluded.
	 *
	 * @return string[]
	 */
	public static function currency_codes(): array {
		return explode( ',', 'AED,AFN,ALL,AMD,ANG,AOA,ARS,AUD,AWG,AZN,BAM,BBD,BDT,BGN,BHD,BIF,BMD,BND,BOB,BOV,BRL,BSD,BTN,BWP,BYN,BZD,CAD,CDF,CHE,CHF,CHW,CLF,CLP,CNY,COP,COU,CRC,CUC,CUP,CVE,CZK,DJF,DKK,DOP,DZD,EGP,ERN,ETB,EUR,FJD,FKP,GBP,GEL,GHS,GIP,GMD,GNF,GTQ,GYD,HKD,HNL,HRK,HTG,HUF,IDR,ILS,INR,IQD,IRR,ISK,JMD,JOD,JPY,KES,KGS,KHR,KMF,KPW,KRW,KWD,KYD,KZT,LAK,LBP,LKR,LRD,LSL,LYD,MAD,MDL,MGA,MKD,MMK,MNT,MOP,MRU,MUR,MVR,MWK,MXN,MXV,MYR,MZN,NAD,NGN,NIO,NOK,NPR,NZD,OMR,PAB,PEN,PGK,PHP,PKR,PLN,PYG,QAR,RON,RSD,RUB,RWF,SAR,SBD,SCR,SDG,SEK,SGD,SHP,SLE,SLL,SOS,SRD,SSP,STN,SVC,SYP,SZL,THB,TJS,TMT,TND,TOP,TRY,TTD,TWD,TZS,UAH,UGX,USD,USN,UYI,UYU,UYW,UZS,VED,VES,VND,VUV,WST,XAF,XAG,XAU,XBA,XBB,XBC,XBD,XCD,XDR,XOF,XPD,XPF,XPT,XSU,XUA,YER,ZAR,ZMW,ZWL' );
	}

	/**
	 * @param array<mixed,mixed> $labels Posted status display labels keyed by status ID.
	 */
	private function sanitize_status_labels( array $labels ): void {
		$statuses = new StatusesRepository();

		foreach ( $labels as $id => $label ) {
			$id    = absint( $id );
			$label = sanitize_text_field( $label );

			if ( $id > 0 && '' !== $label && $statuses->find( $id ) ) {
				$statuses->update(
					$id,
					array(
						'label'      => $label,
						'updated_at' => gmdate( 'Y-m-d H:i:s' ),
					)
				);
			}
		}
	}

	private function sanitize_integer( $value, int $minimum, int $maximum ): int {
		return max( $minimum, min( $maximum, absint( $value ) ) );
	}

	/**
	 * @param string   $value   Candidate value.
	 * @param string[] $choices Allowed choices.
	 * @param string   $default Default fallback.
	 */
	private function sanitize_choice( string $value, array $choices, string $default ): string {
		$value = sanitize_key( $value );

		return in_array( $value, $choices, true ) ? $value : $default;
	}

	private function currency_prices_compatible( string $currency ): bool {
		if ( \Abientot\Support\Currency::precision( $currency ) !== 0 ) {
			return true;
		}
		global $wpdb;
		$prefix = $wpdb->prefix . 'abientot_';
		$count  = $wpdb->get_var( $wpdb->prepare( 'SELECT COUNT(*) FROM %i WHERE MOD(price_cents,100) <> 0', $prefix . 'services' ) );
		if ( $count === null || (int) $count > 0 ) {
			return false;
		}
		$table = $prefix . 'service_selection_definitions';
		if ( $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->esc_like( $table ) ) ) !== $table ) {
			return true;
		}
		$definitions = $wpdb->get_col( $wpdb->prepare( 'SELECT definition_json FROM %i', $table ) );
		if ( $wpdb->last_error ) {
			return false;
		}
		foreach ( $definitions as$json ) {
			$definition = json_decode( $json, true );
			if ( ! is_array( $definition ) ) {
				return false;
			}
			foreach ( array_merge( is_array( $definition['variants'] ?? null ) ? $definition['variants'] : array(), is_array( $definition['extras'] ?? null ) ? $definition['extras'] : array() )as$line ) {
				if ( (int) ( $line['price_delta_cents'] ?? 0 ) % 100 !== 0 ) {
					return false;
				}
			}
		}
		return true;
	}

	private function sync_service_currency( string $previous_currency, string $current_currency ): void {
		$previous_currency = $this->sanitize_currency( $previous_currency );
		$current_currency  = $this->sanitize_currency( $current_currency );

		if ( $previous_currency === $current_currency ) {
			return;
		}

		( new ServicesRepository() )->update_all_currency( $current_currency );
	}

	private function settings_redirect_url( string $return_page ): string {
		if ( 'abientot-form' === $return_page ) {
			return add_query_arg(
				array(
					'page'             => 'abientot-form',
					'settings-updated' => 'true',
				),
				admin_url( 'admin.php' )
			);
		}

		$redirect = wp_get_referer();

		if ( ! $redirect || false !== strpos( $redirect, '/options.php' ) || false !== strpos( $redirect, '/admin-post.php' ) ) {
			$redirect = admin_url( 'admin.php?page=abientot-settings' );
		}

		$redirect = remove_query_arg( array( 'settings-updated', '_wpnonce' ), $redirect );

		return add_query_arg( 'settings-updated', 'true', $redirect );
	}
}