<?php
/**
 * Webfonts
 *
 * @package Baltic
 */

namespace Baltic;

class Webfonts {

	/**
	 * System Fonts
	 *
	 * @since 1.0.19
	 * @var array
	 */
	public static $system_fonts = array();

	/**
	 * Google Fonts
	 *
	 * @since 1.0.19
	 * @var array
	 */
	public static $google_fonts = array();

	/**
	 * Get System Fonts
	 *
	 * @since 1.0.19
	 *
	 * @return Array All the system fonts in Astra
	 */
	public static function get_system_fonts() {
		if ( empty( self::$system_fonts ) ) {
			self::$system_fonts = array(
				'System' => array(
					'fallback' => '-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif',
					'weights'  => array(
						'100',
						'200',
						'300',
						'400',
						'500',
						'600',
						'700',
						'800',
					),
				),
				'Helvetica' => array(
					'fallback' => 'Verdana, Arial, sans-serif',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
				'Verdana'   => array(
					'fallback' => 'Helvetica, Arial, sans-serif',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
				'Arial'     => array(
					'fallback' => 'Helvetica, Verdana, sans-serif',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
				'Times'     => array(
					'fallback' => 'Georgia, serif',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
				'Georgia'   => array(
					'fallback' => 'Times, serif',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
				'Courier'   => array(
					'fallback' => 'monospace',
					'weights'  => array(
						'300',
						'400',
						'700',
					),
				),
			);
		}

		return apply_filters( 'baltic_system_fonts', self::$system_fonts );
	}

	/**
	 * Custom Fonts
	 *
	 * @since 1.0.19
	 *
	 * @return Array All the custom fonts in Astra
	 */
	public static function get_custom_fonts() {
		$custom_fonts = array();

		return apply_filters( 'baltic_custom_fonts', $custom_fonts );
	}

	/**
	 * Google Fonts used in baltic.
	 * Array is generated from the google-fonts.json file.
	 *
	 * @since  1.0.19
	 *
	 * @return Array Array of Google Fonts.
	 */
	public static function get_google_fonts() {

		if ( empty( self::$google_fonts ) ) {

			$google_fonts_file = apply_filters( 'baltic_google_fonts_json_file', BALTIC_DIR . '/assets/google-fonts.json' );

			if ( ! file_exists( BALTIC_DIR . '/assets/google-fonts.json' ) ) {
				return array();
			}

			global $wp_filesystem;
			if ( empty( $wp_filesystem ) ) {
				require_once( ABSPATH . '/wp-admin/includes/file.php' );
				WP_Filesystem();
			}

			$file_contants     = $wp_filesystem->get_contents( $google_fonts_file );
			$google_fonts_json = json_decode( $file_contants, 1 );

			foreach ( $google_fonts_json as $key => $font ) {
				$name = key( $font );
				foreach ( $font[ $name ] as $font_key => $single_font ) {

					if ( 'variants' === $font_key ) {

						foreach ( $single_font as $variant_key => $variant ) {
							if ( stristr( $variant, 'italic' ) ) {
								unset( $font[ $name ][ $font_key ][ $variant_key ] );
							}

							if ( 'regular' == $variant ) {
								$font[ $name ][ $font_key ][ $variant_key ] = '400';
							}
						}
					}

					self::$google_fonts[ $name ] = array_values( $font[ $name ] );
				}
			}
		}

		return apply_filters( 'baltic_google_fonts', self::$google_fonts );
	}

	public static function is_google_fonts( $fontname ) {
		return ( array_key_exists( $fontname, self::$get_google_fonts ) );
	}

	public static function get_font_fallback( $font ) {

		$system_fonts = self::get_system_fonts();
		$google_fonts = self::get_google_fonts();

		$output = '';

		if ( isset( $system_fonts[$font]['fallback'] ) ) {
			$output = $system_fonts[$font]['fallback'];
		} elseif( isset( $google_fonts[$font][1] ) ) {
			$output = $google_fonts[$font][1];
		}

		return $output;
	}

	public static function get_font_family( $font ) {

		$system_fonts = self::get_system_fonts();
		$google_fonts = self::get_google_fonts();
		$output = '';

		if ( isset( $system_fonts[$font] ) && isset( $system_fonts[$font]['fallback'] ) ) {

			if ( 'System' === $font ) {
				$output = $system_fonts[$font]['fallback'];
			} else {
				$output = $font .','. $system_fonts[$font]['fallback'];
			}

		} elseif( isset( $google_fonts[$font] ) && isset( $google_fonts[$font][1] ) ) {
			$output = sprintf( '\'%1$s\', %2$s', $font, $google_fonts[$font][1] );
		} elseif( 'inherit' === $font ) {
			$output = 'inherit';
		}

		return $output;

	}

	public static function get_text_transform( $transform ) {

		if ( empty( $transform ) ) {
			return;
		} else {
			return 'text-transform:' . esc_attr( $transform ) . ';';
		}

	}

}