<?php
/**
 * Plugin settings (single option `devisqr_settings`).
 *
 * @package Devis_Quote_Request
 */

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

class DevisQR_Settings {

	const OPTION = 'devisqr_settings';

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

	/**
	 * Default values. Store-related defaults are read from WooCommerce.
	 *
	 * @return array
	 */
	public static function defaults() {
		return array(
			// Buttons.
			'cart_button_enabled'      => 1,
			'cart_button_position'     => 'after_totals', // after_totals | before_checkout | after_checkout | top | manual
			'cart_button_text'         => '',
			'cart_button_align'        => 'left', // left | center | right
			'style_cart'               => self::default_style(),
			'text_overrides'           => array(),

			// Behaviour.
			'min_cart_total'           => 0,
			'access_mode'              => 'logged_in', // logged_in | roles
			'allowed_roles'            => array( 'customer', 'subscriber', 'administrator', 'shop_manager' ),
			'validity_days'            => 15,
			'quote_prefix'             => 'QT',
			'customer_message_enabled' => 1,

			// E-mails & contact.
			'notification_email'       => '',
			'from_email'               => '',
			'contact_email'            => '',
			'contact_url'              => '',

			// Company block (PDF header/footer).
			'company_name'             => '',
			'company_address'          => '',
			'company_postcode'         => '',
			'company_city'             => '',
			'company_phone'            => '',
			'company_email'            => '',
			'company_registration'     => '',
			'company_vat'              => '',
			'pdf_logo_id'              => 0,
			'pdf_footer_note'          => '',

			// Integrations.

			// Housekeeping.
			'remove_data_on_uninstall'  => 0,
		);
	}

	/**
	 * Default button style.
	 *
	 * @return array
	 */
	public static function default_style() {
		return array(
			'inherit'    => 0,
			'variant'    => 'filled', // filled | outline | link
			'bg'         => '#1e293b',
			'text'       => '#ffffff',
			'border'     => '',
			'hover_bg'   => '#0f172a',
			'hover_text' => '#ffffff',
			'radius'     => 6,
			'size'       => 'md', // sm | md | lg
			'full_width' => 0,
			'icon'       => 1,
		);
	}

	/**
	 * Sanitize one style array.
	 *
	 * @param mixed $value Raw.
	 * @param array $current Current value.
	 * @return array
	 */
	private static function sanitize_style( $value, $current ) {
		$out = wp_parse_args( is_array( $current ) ? $current : array(), self::default_style() );
		if ( ! is_array( $value ) ) {
			return $out;
		}
		foreach ( array( 'bg', 'text', 'border', 'hover_bg', 'hover_text' ) as $k ) {
			if ( array_key_exists( $k, $value ) ) {
				$c        = sanitize_hex_color( (string) $value[ $k ] );
				$out[ $k ] = $c ? $c : '';
			}
		}
		if ( isset( $value['variant'] ) ) {
			$out['variant'] = in_array( $value['variant'], array( 'filled', 'outline', 'link' ), true ) ? $value['variant'] : 'filled';
		}
		if ( isset( $value['size'] ) ) {
			$out['size'] = in_array( $value['size'], array( 'sm', 'md', 'lg' ), true ) ? $value['size'] : 'md';
		}
		if ( isset( $value['radius'] ) ) {
			$out['radius'] = max( 0, min( 60, absint( $value['radius'] ) ) );
		}
		foreach ( array( 'inherit', 'full_width', 'icon' ) as $k ) {
			if ( array_key_exists( $k, $value ) ) {
				$out[ $k ] = ! empty( $value[ $k ] ) ? 1 : 0;
			}
		}
		return $out;
	}

	/**
	 * Get all settings merged with defaults (and runtime fallbacks).
	 *
	 * @return array
	 */
	public static function all() {
		if ( null !== self::$cache ) {
			return self::$cache;
		}
		$saved = get_option( self::OPTION, array() );
		if ( ! is_array( $saved ) ) {
			$saved = array();
		}
		$all = wp_parse_args( $saved, self::defaults() );
		$all['style_cart']    = wp_parse_args( is_array( $all['style_cart'] ) ? $all['style_cart'] : array(), self::default_style() );
		self::$cache = $all;
		return self::$cache;
	}

	/**
	 * Get one setting (raw stored value or default).
	 *
	 * @param string $key Setting key.
	 * @return mixed
	 */
	public static function get( $key ) {
		$all = self::all();
		return isset( $all[ $key ] ) ? $all[ $key ] : null;
	}

	/**
	 * Resolved values with sensible fallbacks (site name, WC store address, admin e-mail).
	 *
	 * @return array
	 */
	public static function resolved() {
		$s = self::all();

		$admin_email   = get_option( 'admin_email' );
		$wc_from_email = get_option( 'woocommerce_email_from_address', $admin_email );

		$s['notification_email'] = $s['notification_email'] ? $s['notification_email'] : $admin_email;
		$s['from_email']         = $s['from_email'] ? $s['from_email'] : ( $wc_from_email ? $wc_from_email : $admin_email );
		$s['contact_email']      = $s['contact_email'] ? $s['contact_email'] : $admin_email;
		$s['company_name']       = $s['company_name'] ? $s['company_name'] : get_bloginfo( 'name' );
		$s['company_address']    = $s['company_address'] ? $s['company_address'] : get_option( 'woocommerce_store_address', '' );
		$s['company_postcode']   = $s['company_postcode'] ? $s['company_postcode'] : get_option( 'woocommerce_store_postcode', '' );
		$s['company_city']       = $s['company_city'] ? $s['company_city'] : get_option( 'woocommerce_store_city', '' );
		$s['company_email']      = $s['company_email'] ? $s['company_email'] : $s['contact_email'];
		$s['pdf_footer_note']    = $s['pdf_footer_note'] ? $s['pdf_footer_note'] : __( 'This document is a quote, not an invoice. Keep it for your records.', 'nuxwp-devis' );

		/**
		 * Filter the resolved settings.
		 *
		 * @param array $s Settings.
		 */
		return apply_filters( 'devisqr_settings', $s );
	}

	/**
	 * Save a (partial) settings array after sanitization.
	 *
	 * @param array $input Raw input.
	 * @return array|WP_Error Saved settings or error.
	 */
	public static function save( $input ) {
		$current  = self::all();
		$defaults = self::defaults();
		$clean    = $current;
		$errors   = array();

		foreach ( $input as $key => $value ) {
			if ( ! array_key_exists( $key, $defaults ) ) {
				continue;
			}
			switch ( $key ) {
				case 'cart_button_position':
					$clean[ $key ] = in_array( $value, array( 'after_totals', 'before_checkout', 'after_checkout', 'top', 'manual' ), true ) ? $value : 'after_totals';
					break;

				case 'cart_button_align':
					$clean[ $key ] = in_array( $value, array( 'left', 'center', 'right' ), true ) ? $value : 'left';
					break;

				case 'style_cart':
					$clean[ $key ] = self::sanitize_style( $value, $current[ $key ] );
					break;

				case 'text_overrides':
					$text_errors   = array();
					$clean[ $key ] = DevisQR_Texts::sanitize_overrides( $value, $text_errors );
					$errors        = array_merge( $errors, $text_errors );
					break;

				case 'cart_button_enabled':
				case 'customer_message_enabled':
				case 'remove_data_on_uninstall':
					$clean[ $key ] = ! empty( $value ) ? 1 : 0;
					break;

				case 'min_cart_total':
					$clean[ $key ] = max( 0, (float) $value );
					break;

				case 'validity_days':
					$clean[ $key ] = max( 1, min( 365, absint( $value ) ) );
					break;

				case 'pdf_logo_id':
					$clean[ $key ] = absint( $value );
					break;

				case 'access_mode':
					$clean[ $key ] = in_array( $value, array( 'logged_in', 'roles' ), true ) ? $value : 'logged_in';
					break;

				case 'allowed_roles':
					$roles = array();
					$known = array_keys( wp_roles()->roles );
					foreach ( (array) $value as $role ) {
						$role = sanitize_key( $role );
						if ( in_array( $role, $known, true ) ) {
							$roles[] = $role;
						}
					}
					$clean[ $key ] = $roles;
					break;

				case 'quote_prefix':
					$prefix = strtoupper( preg_replace( '/[^A-Za-z0-9]/', '', (string) $value ) );
					$clean[ $key ] = $prefix ? substr( $prefix, 0, 6 ) : 'QT';
					break;

				case 'notification_email':
					$value = trim( (string) $value );
					if ( '' === $value ) {
						$clean[ $key ] = '';
						break;
					}
					$valid = array();
					foreach ( array_map( 'trim', explode( ',', $value ) ) as $email ) {
						if ( is_email( $email ) ) {
							$valid[] = sanitize_email( $email );
						} elseif ( '' !== $email ) {
							$errors[] = __( 'One of the notification e-mail addresses is invalid.', 'nuxwp-devis' );
						}
					}
					$clean[ $key ] = implode( ', ', $valid );
					break;

				case 'from_email':
				case 'contact_email':
				case 'company_email':
					$value = trim( (string) $value );
					if ( '' !== $value && ! is_email( $value ) ) {
						$errors[] = __( 'An e-mail address is invalid.', 'nuxwp-devis' );
						break;
					}
					$clean[ $key ] = sanitize_email( $value );
					break;

				case 'contact_url':
					$clean[ $key ] = esc_url_raw( trim( (string) $value ) );
					break;

				case 'pdf_footer_note':
					$clean[ $key ] = sanitize_textarea_field( $value );
					break;

				default:
					$clean[ $key ] = sanitize_text_field( $value );
			}
		}

		if ( ! empty( $errors ) ) {
			return new WP_Error( 'devisqr_invalid_settings', implode( ' ', array_unique( $errors ) ), array( 'status' => 400 ) );
		}

		update_option( self::OPTION, $clean, false );
		self::$cache = null;
		// Branding stamp: stored PDFs older than this are regenerated on download (logo, company details, texts).
		update_option( 'devisqr_branding_stamp', time(), false );

		return self::all();
	}

	/**
	 * My Account endpoint slug.
	 *
	 * @return string
	 */
	public static function account_endpoint() {
		/**
		 * Filter the My Account endpoint slug used for the quotes tab.
		 *
		 * @param string $slug Default 'quotes'.
		 */
		$slug = apply_filters( 'devisqr_account_endpoint', 'quotes' );
		return sanitize_title( $slug ) ? sanitize_title( $slug ) : 'quotes';
	}

	/**
	 * Roles that may request a quote (resolved).
	 *
	 * @return array|null Null when every logged-in user may request.
	 */
	public static function allowed_roles() {
		$s = self::all();
		if ( 'roles' !== $s['access_mode'] ) {
			return null;
		}
		/**
		 * Filter the roles allowed to request a quote.
		 *
		 * @param array $roles Role slugs.
		 */
		return apply_filters( 'devisqr_allowed_roles', (array) $s['allowed_roles'] );
	}
}