<?php
/**
 * Chateau Theme Options
 *
 * @package Chateau
 */

/**
 * Properly enqueue styles and scripts for our theme options page.
 *
 * This function is attached to the admin_enqueue_scripts action hook.
 */
function chateau_admin_enqueue_scripts( $hook_suffix ) {
	wp_enqueue_style( 'chateau-theme-options', get_template_directory_uri() . '/inc/theme-options.css', false, '20110610' );
	wp_enqueue_script( 'chateau-theme-options', get_template_directory_uri() . '/inc/theme-options.js', array( 'farbtastic' ), '20110610' );
	wp_enqueue_style( 'farbtastic' );
}
add_action( 'admin_print_styles-appearance_page_theme_options', 'chateau_admin_enqueue_scripts' );

/**
 * Register the form setting for our chateau_options array.
 *
 * This function is attached to the admin_init action hook.
 *
 * This call to register_setting() registers a validation callback, chateau_theme_options_validate(),
 * which is used when the option is saved, to ensure that our option values are complete, properly
 * formatted, and safe.
 *
 * We also use this function to add our theme option if it doesn't already exist.
 */
function chateau_theme_options_init() {

	// If we have no options in the database, let's add them now.
	if ( false === chateau_get_theme_options() )
		add_option( 'chateau_theme_options', chateau_get_default_theme_options() );

	register_setting(
		'chateau_options', // Options group, see settings_fields() call in theme_options_render_page()
		'chateau_theme_options', // Database option, see chateau_get_theme_options()
		'chateau_theme_options_validate' // The sanitization callback, see chateau_theme_options_validate()
	);
}
add_action( 'admin_init', 'chateau_theme_options_init' );

/**
 * Change the capability required to save the 'chateau_options' options group.
 *
 * @see chateau_theme_options_init() First parameter to register_setting() is the name of the options group.
 * @see chateau_theme_options_add_page() The edit_theme_options capability is used for viewing the page.
 *
 * By default, the options groups for all registered settings require the manage_options capability.
 * This filter is required to change our theme options page to edit_theme_options instead.
 * By default, only administrators have either of these capabilities, but the desire here is
 * to allow for finer-grained control for roles and users.
 *
 * @param string $capability The capability used for the page, which is manage_options by default.
 * @return string The capability to actually use.
 */
function chateau_option_page_capability( $capability ) {
	return 'edit_theme_options';
}
add_filter( 'option_page_capability_chateau_options', 'chateau_option_page_capability' );

/**
 * Add our theme options page to the admin menu, including some help documentation.
 *
 * This function is attached to the admin_menu action hook.
 *
 */
function chateau_theme_options_add_page() {
	$theme_page = add_theme_page(
		__( 'Theme Options', 'chateau' ), // Name of page
		__( 'Theme Options', 'chateau' ), // Label in menu
		'edit_theme_options', // Capability required
		'theme_options', // Menu slug, used to uniquely identify the page
		'theme_options_render_page' // Function that renders the options page
	);
}
add_action( 'admin_menu', 'chateau_theme_options_add_page' );

/**
 * Returns an array of color schemes registered for Chateau.
 *
 */
function chateau_color_schemes() {
	$color_scheme_options = array(
		'light' => array(
			'value' => 'light',
			'label' => __( 'Light', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/light.png',
			'default_link_color' => '#990000',
		),
		'dark' => array(
			'value' => 'dark',
			'label' => __( 'Dark', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/dark.png',
			'default_link_color' => '#ffffff',
		),
	);

	return apply_filters( 'chateau_color_schemes', $color_scheme_options );
}

/**
 * Returns an array of archive styles registered for Chateau.
 *
 */
function chateau_archive_styles() {
	$archive_style_options = array(
		'detail' => array(
			'value' => 'detail',
			'label' => __( 'Detail', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/detail.png',
		),
		'concise' => array(
			'value' => 'concise',
			'label' => __( 'Concise', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/concise.png',
		),
	);

	return apply_filters( 'chateau_archive_styles', $archive_style_options );
}

/**
 * Returns an array of layouts registered for Chateau.
 *
 */
function chateau_theme_layouts() {
	$theme_layout_options = array(
		'sidebar-content' => array(
			'value' => 'sidebar-content',
			'label' => __( 'Sidebar-Content', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/sidebar-content.png',
		),
		'content-sidebar' => array(
			'value' => 'content-sidebar',
			'label' => __( 'Content-Sidebar', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/content-sidebar.png',
		),
		'content' => array(
			'value' => 'content',
			'label' => __( 'One Column, No Sidebar', 'chateau' ),
			'thumbnail' => get_template_directory_uri() . '/inc/images/content.png',
		)
	);

	return apply_filters( 'chateau_theme_layouts', $theme_layout_options );
}

/**
 * Returns the default options for Chateau.
 *
 */
function chateau_get_default_theme_options() {
	$default_theme_options = array(
		'color_scheme' => 'light',
		'link_color'   => chateau_get_default_link_color( 'light' ),
		'archive_style' => 'detail',
		'theme_layout' => 'sidebar-content'
	);

	return apply_filters( 'chateau_default_theme_options', $default_theme_options );
}

/**
 * Returns the default link color for Chateau, based on color scheme.
 *
 * @param $string $color_scheme Color scheme. Defaults to the active color scheme.
 * @return $string Color.
*/
function chateau_get_default_link_color( $color_scheme = null ) {
	if ( null === $color_scheme ) {
		$options = chateau_get_theme_options();
		$color_scheme = $options['color_scheme'];
	}

	$color_schemes = chateau_color_schemes();
	if ( ! isset( $color_schemes[ $color_scheme ] ) )
		return false;

	return $color_schemes[ $color_scheme ]['default_link_color'];
}

/**
 * Returns the options array for Chateau.
 *
 */
function chateau_get_theme_options() {
	return get_option( 'chateau_theme_options', chateau_get_default_theme_options() );
}

/**
 * Returns the options array for Chateau.
 *
 */
function theme_options_render_page() {
	?>
	<div class="wrap">
		<h2><?php printf( __( '%s Theme Options', 'chateau' ), wp_get_theme() ); ?></h2>
		<?php settings_errors(); ?>

		<form method="post" action="options.php">
			<?php
				settings_fields( 'chateau_options' );
				$options = chateau_get_theme_options();
				$default_options = chateau_get_default_theme_options();
			?>

			<table class="form-table">

				<tr valign="top" class="image-radio-option color-scheme"><th scope="row"><?php _e( 'Color Scheme', 'chateau' ); ?></th>
					<td>
						<fieldset><legend class="screen-reader-text"><span><?php _e( 'Color Scheme', 'chateau' ); ?></span></legend>
						<?php
							foreach ( chateau_color_schemes() as $scheme ) {
								?>
								<div class="layout">
								<label class="description">
									<input type="radio" name="chateau_theme_options[color_scheme]" value="<?php echo esc_attr( $scheme['value'] ); ?>" <?php checked( $options['color_scheme'], $scheme['value'] ); ?> />
									<input type="hidden" id="default-color-<?php echo esc_attr( $scheme['value'] ); ?>" value="<?php echo esc_attr( $scheme['default_link_color'] ); ?>" />
									<span>
										<img src="<?php echo esc_url( $scheme['thumbnail'] ); ?>" width="136" height="122" alt="" />
										<?php echo $scheme['label']; ?>
									</span>
								</label>
								</div>
								<?php
							}
						?>
						</fieldset>
					</td>
				</tr>

				<tr valign="top"><th scope="row"><?php _e( 'Accent Color', 'chateau' ); ?></th>
					<td>
						<fieldset><legend class="screen-reader-text"><span><?php _e( 'Accent Color', 'chateau' ); ?></span></legend>
							<input type="text" name="chateau_theme_options[link_color]" id="link-color" value="<?php echo esc_attr( $options['link_color'] ); ?>" />
							<a href="#" class="pickcolor hide-if-no-js" id="link-color-example"></a>
							<input type="button" class="pickcolor button hide-if-no-js" value="<?php esc_attr_e( 'Select a Color', 'chateau' ); ?>" />
							<div id="colorPickerDiv" style="z-index: 100; background:#eee; border:1px solid #ccc; position:absolute; display:none;"></div>
							<br />
							<span><?php printf( __( 'Default color: %s', 'chateau' ), '<span id="default-color">' . chateau_get_default_link_color( $options['color_scheme'] ) . '</span>' ); ?></span>
						</fieldset>
					</td>
				</tr>
				<tr valign="top" class="image-radio-option theme-layout"><th scope="row"><?php _e( 'Layout', 'chateau' ); ?></th>
					<td>
						<fieldset><legend class="screen-reader-text"><span><?php _e( 'Layout', 'chateau' ); ?></span></legend>
						<?php
							foreach ( chateau_theme_layouts() as $layout ) {
								?>
								<div class="layout">
								<label class="description">
									<input type="radio" name="chateau_theme_options[theme_layout]" value="<?php echo esc_attr( $layout['value'] ); ?>" <?php checked( $options['theme_layout'], $layout['value'] ); ?> />

									<span>
										<img src="<?php echo esc_url( $layout['thumbnail'] ); ?>" width="136" height="122" alt="" />
										<?php echo $layout['label']; ?>
									</span>
								</label>
								</div>
								<?php
							}
						?>
						</fieldset>
					</td>
				</tr>
				<tr valign="top" class="image-radio-option archive-style"><th scope="row"><?php _e( 'Archive style', 'chateau' ); ?></th>
					<td>
						<fieldset><legend class="screen-reader-text"><span><?php _e( 'Archive Style', 'chateau' ); ?></span></legend>
						<?php
							foreach ( chateau_archive_styles() as $archive_style ) {
								?>
								<div class="layout">
								<label class="description">
									<input type="radio" name="chateau_theme_options[archive_style]" value="<?php echo esc_attr( $archive_style['value'] ); ?>" <?php checked( $options['archive_style'], $archive_style['value'] ); ?> />

									<span>
										<img src="<?php echo esc_url( $archive_style['thumbnail'] ); ?>" width="250" height="224" alt="" />
										<?php echo $archive_style['label']; ?>
									</span>
								</label>
								</div>
								<?php
							}
						?>
						</fieldset>
					</td>
				</tr>
			</table>

			<p class="submit">
				<?php submit_button( __( 'Save Options', 'chateau' ), 'primary', 'submit', false ); ?>
				<?php submit_button( __( 'Reset Options', 'chateau' ), 'secondary', 'chateau_theme_options[reset]', false, array( 'id' => 'reset' ) ); ?>
			</p>
		</form>
	</div>
	<?php
}

/**
 * Sanitize and validate form input. Accepts an array, return a sanitized array.
 *
 * @see chateau_theme_options_init()
 *
 */
function chateau_theme_options_validate( $input ) {
	$output = $defaults = chateau_get_default_theme_options();

	// Color scheme must be in our array of color scheme options
	if ( isset( $input['color_scheme'] ) && array_key_exists( $input['color_scheme'], chateau_color_schemes() ) )
		$output['color_scheme'] = $input['color_scheme'];

	// Our defaults for the link color may have changed, based on the color scheme.
	$output['link_color'] = $defaults['link_color'] = chateau_get_default_link_color( $output['color_scheme'] );

	// Link color must be 3 or 6 hexadecimal characters
	if ( isset( $input['link_color'] ) && preg_match( '/^#?([a-f0-9]{3}){1,2}$/i', $input['link_color'] ) )
		$output['link_color'] = '#' . strtolower( ltrim( $input['link_color'], '#' ) );

	// Theme layout must be in our array of theme layout options
	if ( isset( $input['theme_layout'] ) && array_key_exists( $input['theme_layout'], chateau_theme_layouts() ) )
		$output['theme_layout'] = $input['theme_layout'];

			// Archive style must be in our array of archive style options
	if ( isset( $input['archive_style'] ) && array_key_exists( $input['archive_style'], chateau_archive_styles() ) )
		$output['archive_style'] = $input['archive_style'];

	// Reset to default options
	if ( ! empty( $input['reset'] ) ) {
		$output = $defaults = chateau_get_default_theme_options();
		foreach ( $ouput as $field => $value ) {
			if ( isset( $defaults[$field] ) )
				$output[$field] = $defaults[$field];
			else
				unset( $output[$field] );
		}
	}
	return apply_filters( 'chateau_theme_options_validate', $output, $input, $defaults );
}

/**
 * Enqueue the styles for the current color scheme.
 *
 */
function chateau_enqueue_color_scheme() {
	$options = chateau_get_theme_options();
	$color_scheme = $options['color_scheme'];

	if ( 'dark' == $color_scheme )
		wp_enqueue_style( 'dark', get_template_directory_uri() . '/css/dark.css', array(), null );

	do_action( 'chateau_enqueue_color_scheme', $color_scheme );
}
add_action( 'wp_enqueue_scripts', 'chateau_enqueue_color_scheme' );

/**
 * Add a style block to the theme for the current link color.
 *
 * This function is attached to the wp_head action hook.
 *

 */
function chateau_print_link_color_style() {
	$options = chateau_get_theme_options();
	$link_color = $options['link_color'];

	$default_options = chateau_get_default_theme_options();

	// Don't do anything if the current link color is the default.
	if ( $default_options['link_color'] == $link_color )
		return;
?>
	<style>
		#page {
			border-color: <?php echo $link_color; ?>;
		}
		#main-title #site-title a:hover,
		.post-title h1,
		.post-title h1 a,
		.post-extras .post-edit-link,
		.post-entry a,
		.post-entry .more-link:hover,
		#author-description a,
		.more-posts .page-title em,
		#more-posts-inner a:hover,
		#comments li a:hover,
		.comment-text p a,
		.comment-text .reply-link a:hover,
		#comments li.byuser .comment-author,
		#comments #respond h3,
		.sidebar-widget a:active,
		#calendar_wrap table td a,
		#nav-below a:active,
		#error404 a:hover,
		#menu .current-menu-item > a,
		#menu .current_page_item > a,
		#comment-nav-above a,
		#comment-nav-below a,
		.comment-text table a {
			color: <?php echo $link_color; ?>;
		}
	</style>
<?php
}
add_action( 'wp_head', 'chateau_print_link_color_style' );

/**
 * Adds Chateau layout classes to the array of body classes.
 *
 */
function chateau_layout_classes( $existing_classes ) {
	$options = chateau_get_theme_options();
	$current_layout = $options['theme_layout'];

	if ( in_array( $current_layout, array( 'content-sidebar', 'sidebar-content' ) ) )
		$classes = array( 'two-column' );
	else
		$classes = array( 'one-column' );

	// override if layout page templates are used
	if ( is_page_template( 'page-fullwidth.php' ) ) $current_layout = 'content';

	$classes[] = $current_layout;

	$classes = apply_filters( 'chateau_layout_classes', $classes, $current_layout );

	return array_merge( $existing_classes, $classes );
}
add_filter( 'body_class', 'chateau_layout_classes' );