<?php
/**
 * Settings storage (one option: paygrab_settings).
 *
 * @package PAYGRAB
 */

defined( 'ABSPATH' ) || exit;

/**
 * Read and write PAYGRAB settings.
 */
class Paygrab_Settings {

	const OPTION = 'paygrab_settings';

	/**
	 * Request cache.
	 *
	 * @var array|null
	 */
	private static $cache = null;

	/**
	 * Default values.
	 *
	 * @return array<string,mixed>
	 */
	public static function defaults() {
		$defaults = array(
			// Payment: bank transfer.
			'bank_name'        => '',
			'bank_branch'      => '',
			'bank_branch_code' => '',
			'bank_type'        => 'ordinary',
			'bank_number'      => '',
			'bank_holder'      => '',
			'pay_days'         => 7,
			'remind'           => true,

			// Specified Commercial Transactions Act (tokushoho) page.
			'law_seller'       => '',
			'law_manager'      => '',
			'law_address'      => '',
			'law_address_hide' => false,
			'law_phone'        => '',
			'law_phone_hide'   => false,
			'law_email'        => '',
			'law_delivery'     => __( 'You can download the product from My page right after we confirm your payment.', 'paygrab' ),
			'law_cancel'       => __( 'You can cancel your order before you pay. Because these are digital products, we cannot accept returns or cancellations after payment.', 'paygrab' ),
			'law_environment'  => '',

			// Pages.
			'page_checkout'    => 0,
			'page_mypage'      => 0,
			'page_register'    => 0,
			'page_login'       => 0,
			'page_tokushoho'   => 0,
			'page_terms'       => 0,

			// Members.
			'register_role'    => 'subscriber',
			'email_verification' => true,
			'terms_text'       => '',
			'terms_scroll'     => false,

			// Look of the buyer's screens.
			'design_style'     => 'standard',
			'key_color_mode'   => 'theme',
			'key_color'        => '#0b6e6e',

			// Mail.
			'mail_from_name'   => '',
			'mail_from'        => '',
			'mail_admin'       => '',

			// When the plugin is deleted: keep everything (orders are accounting records) unless this is on.
			'delete_data'      => false,
		);
		/**
		 * Filters the default settings. Add-ons add their own keys here.
		 *
		 * @param array $defaults Defaults.
		 */
		return apply_filters( 'paygrab_default_settings', $defaults );
	}

	/**
	 * All settings merged with defaults.
	 *
	 * @return array<string,mixed>
	 */
	public static function all() {
		if ( null === self::$cache ) {
			$saved       = get_option( self::OPTION, array() );
			self::$cache = array_merge( self::defaults(), is_array( $saved ) ? $saved : array() );
		}
		return self::$cache;
	}

	/**
	 * One setting.
	 *
	 * @param string $key      Key.
	 * @param mixed  $fallback Value when the key is unknown.
	 * @return mixed
	 */
	public static function get( $key, $fallback = null ) {
		$all = self::all();
		return array_key_exists( $key, $all ) ? $all[ $key ] : $fallback;
	}

	/**
	 * Save some settings (already sanitized).
	 *
	 * @param array<string,mixed> $changes Key => value.
	 * @return void
	 */
	public static function update( array $changes ) {
		$saved = get_option( self::OPTION, array() );
		$saved = array_merge( is_array( $saved ) ? $saved : array(), $changes );
		update_option( self::OPTION, $saved, true );
		self::$cache = null;
	}

	/**
	 * Forget the request cache (after another process saved).
	 *
	 * @return void
	 */
	public static function flush() {
		self::$cache = null;
	}

	/**
	 * Whether the bank account needed for transfers is filled in.
	 *
	 * @return bool
	 */
	public static function bank_ready() {
		foreach ( array( 'bank_name', 'bank_branch', 'bank_number', 'bank_holder' ) as $key ) {
			if ( '' === trim( (string) self::get( $key ) ) ) {
				return false;
			}
		}
		return true;
	}

	/**
	 * Tokushoho items that are still empty.
	 *
	 * @return string[] Setting keys.
	 */
	public static function missing_law_items() {
		$missing = array();
		foreach ( array( 'law_seller', 'law_manager', 'law_address', 'law_phone', 'law_email' ) as $key ) {
			if ( in_array( $key, array( 'law_address', 'law_phone' ), true ) && self::get( $key . '_hide' ) ) {
				continue;
			}
			if ( '' === trim( (string) self::get( $key ) ) ) {
				$missing[] = $key;
			}
		}
		return $missing;
	}

	/**
	 * Label of the bank account type.
	 *
	 * @return string
	 */
	public static function bank_type_label() {
		return 'checking' === self::get( 'bank_type' ) ? __( 'Checking', 'paygrab' ) : __( 'Ordinary', 'paygrab' );
	}
}