<?php
/**
 * Settings page: Quotes → Settings, with tabs.
 *
 * - klbq_settings (option group "klbq"): general and document options.
 *   Each tab posts only its own fields; the sanitizer merges them with the
 *   stored values so saving one tab never resets another.
 * - klbq_company (option group "klbq_company"): the company printed on quotes.
 *
 * Extensions can add tabs and fields through the klbq_settings_tabs and
 * klbq_settings_fields filters.
 *
 * @package KoalabQuote
 */

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

/**
 * Settings fields: key => [label, type, default, tab, description].
 *
 * @return array
 */
function klbq_settings_fields() {
	$labels = klbq_country_tax_labels( klbq_base_country() );
	$fields = array(
		'prefix'             => array( __( 'Quote number prefix', 'koalab-quote' ), 'text', _x( 'QT-', 'default quote number prefix', 'koalab-quote' ), 'general', __( 'Quotes are numbered PREFIX0001, PREFIX0002…', 'koalab-quote' ) ),
		'validity'           => array( __( 'Default validity (days)', 'koalab-quote' ), 'number', 15, 'general', '' ),
		'company_tax_label'  => array( __( 'Company tax ID label', 'koalab-quote' ), 'text', $labels[0], 'general', __( 'Printed before your tax ID, e.g. NIT, RFC, CUIT, RUT or RUC.', 'koalab-quote' ) ),
		'client_tax_label'   => array( __( 'Customer tax ID label', 'koalab-quote' ), 'text', $labels[1], 'general', '' ),
		'show_images'        => array( __( 'Show product images on new quotes', 'koalab-quote' ), 'checkbox', 1, 'general', '' ),
		'show_regular_price' => array( __( 'Show the store price struck through and the savings on new quotes', 'koalab-quote' ), 'checkbox', 1, 'general', __( 'Only when the quoted price is lower than the store price.', 'koalab-quote' ) ),
		'delete_data'        => array( __( 'Delete all quotes and settings when the plugin is deleted', 'koalab-quote' ), 'checkbox', 0, 'general', '' ),
		'doc_title'          => array( __( 'Document title', 'koalab-quote' ), 'text', __( 'Quote', 'koalab-quote' ), 'document', '' ),
		'terms'              => array( __( 'Default terms and conditions', 'koalab-quote' ), 'textarea', __( 'Prices and availability may change without notice until payment is confirmed.', 'koalab-quote' ), 'document', __( 'One item per line. Editable on each quote.', 'koalab-quote' ) ),
		'extra_title'        => array( __( 'Additional block title', 'koalab-quote' ), 'text', __( 'Warranty', 'koalab-quote' ), 'document', __( 'A fixed block printed on every quote, e.g. warranty or payment details.', 'koalab-quote' ) ),
		'extra_text'         => array( __( 'Additional block text', 'koalab-quote' ), 'textarea', '', 'document', __( 'One item per line. Leave empty to hide the block.', 'koalab-quote' ) ),
		'thanks'             => array( __( 'Footer message', 'koalab-quote' ), 'text', __( 'Thank you for your business.', 'koalab-quote' ), 'document', '' ),
	);

	/**
	 * Filters the settings fields.
	 *
	 * @param array $fields key => [label, type, default, tab, description].
	 */
	return (array) apply_filters( 'klbq_settings_fields', $fields );
}

/**
 * Settings merged with defaults.
 *
 * @return array
 */
function klbq_settings() {
	$saved = get_option( 'klbq_settings', array() );
	$saved = is_array( $saved ) ? $saved : array();
	$out   = array();
	foreach ( klbq_settings_fields() as $key => $field ) {
		// Saved textareas may be empty on purpose; other empty values take the default.
		$out[ $key ] = array_key_exists( $key, $saved ) && ( '' !== $saved[ $key ] || 'textarea' === $field[1] ) ? $saved[ $key ] : $field[2];
	}
	return $out;
}

/**
 * One setting.
 *
 * @param string $key Key.
 * @return mixed
 */
function klbq_setting( $key ) {
	$settings = klbq_settings();
	return isset( $settings[ $key ] ) ? $settings[ $key ] : null;
}

/**
 * Settings tabs.
 *
 * @return array<string, string> Slug => label.
 */
function klbq_settings_tabs() {
	return (array) apply_filters(
		'klbq_settings_tabs',
		array(
			'general'  => __( 'General', 'koalab-quote' ),
			'brands'   => __( 'Company', 'koalab-quote' ),
			'document' => __( 'Document', 'koalab-quote' ),
		)
	);
}

add_action( 'admin_menu', function () {
	add_submenu_page(
		'edit.php?post_type=' . KLBQ_CPT,
		__( 'Koalab Quote settings', 'koalab-quote' ),
		__( 'Settings', 'koalab-quote' ),
		klbq_cap(),
		'klbq-settings',
		'klbq_render_settings_page'
	);
} );

add_action( 'admin_init', function () {
	register_setting(
		'klbq',
		'klbq_settings',
		array(
			'type'              => 'array',
			'sanitize_callback' => 'klbq_sanitize_settings',
			'default'           => array(),
		)
	);
	register_setting(
		'klbq_company',
		'klbq_company',
		array(
			'type'              => 'array',
			'sanitize_callback' => 'klbq_sanitize_company',
			'default'           => array(),
		)
	);
} );

// Shop managers may save the settings (options.php checks these caps).
add_filter( 'option_page_capability_klbq', 'klbq_cap' );
add_filter( 'option_page_capability_klbq_company', 'klbq_cap' );

/**
 * Sanitize the posted tab and merge it with the stored settings.
 *
 * @param mixed $value Raw value.
 * @return array
 */
function klbq_sanitize_settings( $value ) {
	$value = is_array( $value ) ? $value : array();
	$saved = get_option( 'klbq_settings', array() );
	$out   = is_array( $saved ) ? $saved : array();
	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- options.php verified the nonce.
	$tab = isset( $_POST['klbq_tab'] ) ? sanitize_key( wp_unslash( $_POST['klbq_tab'] ) ) : '';

	foreach ( klbq_settings_fields() as $key => $field ) {
		$in_tab = '' === $tab ? array_key_exists( $key, $value ) : $field[3] === $tab;
		if ( ! $in_tab ) {
			continue;
		}
		$raw = isset( $value[ $key ] ) ? $value[ $key ] : '';
		$raw = is_array( $raw ) ? array_map( 'sanitize_text_field', wp_unslash( $raw ) ) : wp_unslash( $raw );
		switch ( $field[1] ) {
			case 'textarea':
				$out[ $key ] = sanitize_textarea_field( $raw );
				break;
			case 'checkbox':
				$out[ $key ] = empty( $raw ) ? 0 : 1;
				break;
			case 'number':
				$out[ $key ] = '' === $raw ? '' : max( 0, (float) $raw );
				break;
			case 'email':
				$out[ $key ] = sanitize_email( $raw );
				break;
			case 'roles':
				$roles       = array_keys( wp_roles()->get_names() );
				$out[ $key ] = array_values( array_intersect( (array) $raw, $roles ) );
				break;
			case 'select':
				$options     = isset( $field[5] ) ? array_keys( (array) $field[5] ) : array();
				$out[ $key ] = in_array( $raw, $options, true ) ? $raw : $field[2];
				break;
			default:
				$out[ $key ] = sanitize_text_field( $raw );
		}
	}
	return $out;
}

/**
 * Sanitize the company form.
 *
 * @param mixed $value Raw company data.
 * @return array
 */
function klbq_sanitize_company( $value ) {
	$company = klbq_sanitize_brand( is_array( $value ) ? $value : array() );
	if ( empty( $value['id'] ) ) {
		$company['id'] = klbq_company()['id'];
	}
	return $company;
}

add_action( 'admin_enqueue_scripts', function ( $hook ) {
	if ( false === strpos( (string) $hook, 'klbq-settings' ) ) {
		return;
	}
	wp_enqueue_media();
	wp_enqueue_style( 'klbq-admin', KLBQ_URL . 'assets/css/admin.css', array(), KLBQ_VERSION );
	wp_enqueue_script( 'klbq-admin', KLBQ_URL . 'assets/js/admin.js', array( 'jquery' ), KLBQ_VERSION, true );
	wp_localize_script(
		'klbq-admin',
		'klbqAdmin',
		array(
			'chooseLogo' => __( 'Choose logo', 'koalab-quote' ),
			'useLogo'    => __( 'Use this logo', 'koalab-quote' ),
		)
	);
} );

/**
 * Current settings tab.
 *
 * @return string
 */
function klbq_current_tab() {
	$tabs = klbq_settings_tabs();
	// phpcs:ignore WordPress.Security.NonceVerification.Recommended
	$tab = isset( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : 'general';
	return isset( $tabs[ $tab ] ) ? $tab : 'general';
}

/**
 * Render the settings page.
 */
function klbq_render_settings_page() {
	if ( ! current_user_can( klbq_cap() ) ) {
		return;
	}
	$tab  = klbq_current_tab();
	$base = admin_url( 'edit.php?post_type=' . KLBQ_CPT . '&page=klbq-settings' );
	?>
	<div class="wrap klbq-settings">
		<h1><?php echo esc_html( klbq_product_name() ); ?></h1>
		<?php settings_errors(); ?>
		<nav class="nav-tab-wrapper">
			<?php foreach ( klbq_settings_tabs() as $slug => $label ) : ?>
				<a href="<?php echo esc_url( add_query_arg( 'tab', $slug, $base ) ); ?>" class="nav-tab<?php echo $slug === $tab ? ' nav-tab-active' : ''; ?>"><?php echo esc_html( $label ); ?></a>
			<?php endforeach; ?>
		</nav>
		<div class="klbq-settings-body">
			<div class="klbq-settings-main">
				<?php
				if ( 'brands' === $tab ) {
					klbq_render_brands_tab();
				} elseif ( has_action( 'klbq_render_tab_' . $tab ) ) {
					do_action( 'klbq_render_tab_' . $tab );
				} else {
					klbq_render_fields_tab( $tab );
				}
				?>
			</div>
			<?php do_action( 'klbq_settings_sidebar', $tab ); ?>
		</div>
	</div>
	<?php
}

/**
 * Render a tab built from klbq_settings_fields().
 *
 * @param string $tab Tab slug.
 */
function klbq_render_fields_tab( $tab ) {
	$values = klbq_settings();
	?>
	<form method="post" action="options.php">
		<?php settings_fields( 'klbq' ); ?>
		<input type="hidden" name="klbq_tab" value="<?php echo esc_attr( $tab ); ?>">
		<?php do_action( 'klbq_before_fields_' . $tab ); ?>
		<table class="form-table" role="presentation">
			<?php
			foreach ( klbq_settings_fields() as $key => $field ) {
				if ( $field[3] === $tab ) {
					klbq_render_field( $key, $field, $values[ $key ] );
				}
			}
			?>
		</table>
		<?php submit_button(); ?>
	</form>
	<?php
}

/**
 * Render one settings row.
 *
 * @param string $key   Key.
 * @param array  $field Field definition.
 * @param mixed  $value Current value.
 */
function klbq_render_field( $key, $field, $value ) {
	$id   = 'klbq_' . $key;
	$name = 'klbq_settings[' . $key . ']';
	$desc = isset( $field[4] ) ? $field[4] : '';
	?>
	<tr>
		<th scope="row"><?php if ( 'checkbox' !== $field[1] && 'roles' !== $field[1] ) : ?><label for="<?php echo esc_attr( $id ); ?>"><?php echo esc_html( $field[0] ); ?></label><?php else : ?><?php echo esc_html( $field[0] ); ?><?php endif; ?></th>
		<td>
			<?php if ( 'textarea' === $field[1] ) : ?>
				<textarea id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>" rows="4" class="large-text"><?php echo esc_textarea( (string) $value ); ?></textarea>
			<?php elseif ( 'checkbox' === $field[1] ) : ?>
				<label><input type="checkbox" id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>" value="1" <?php checked( ! empty( $value ) ); ?>> <?php esc_html_e( 'Enabled', 'koalab-quote' ); ?></label>
			<?php elseif ( 'number' === $field[1] ) : ?>
				<input type="number" min="0" step="any" id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>" value="<?php echo esc_attr( (string) $value ); ?>" class="small-text">
			<?php elseif ( 'select' === $field[1] ) : ?>
				<select id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>">
					<?php foreach ( (array) $field[5] as $opt => $label ) : ?>
						<option value="<?php echo esc_attr( $opt ); ?>" <?php selected( $value, $opt ); ?>><?php echo esc_html( $label ); ?></option>
					<?php endforeach; ?>
				</select>
			<?php elseif ( 'roles' === $field[1] ) : ?>
				<fieldset>
					<?php foreach ( wp_roles()->get_names() as $role => $label ) : ?>
						<label style="display:inline-block;margin:0 16px 6px 0"><input type="checkbox" name="<?php echo esc_attr( $name ); ?>[]" value="<?php echo esc_attr( $role ); ?>" <?php checked( in_array( $role, (array) $value, true ) ); ?>> <?php echo esc_html( translate_user_role( $label ) ); ?></label>
					<?php endforeach; ?>
				</fieldset>
			<?php else : ?>
				<input type="<?php echo 'email' === $field[1] ? 'email' : 'text'; ?>" id="<?php echo esc_attr( $id ); ?>" name="<?php echo esc_attr( $name ); ?>" value="<?php echo esc_attr( (string) $value ); ?>" class="regular-text">
			<?php endif; ?>
			<?php if ( $desc ) : ?>
				<p class="description"><?php echo esc_html( $desc ); ?></p>
			<?php endif; ?>
		</td>
	</tr>
	<?php
}

/**
 * Company tab. Extensions may replace this form (klbq_render_brands_tab).
 */
function klbq_render_brands_tab() {
	if ( has_action( 'klbq_render_brands_tab' ) ) {
		do_action( 'klbq_render_brands_tab' );
		return;
	}
	?>
	<form method="post" action="options.php">
		<?php settings_fields( 'klbq_company' ); ?>
		<p><?php esc_html_e( 'This data is printed in the header and footer of every quote.', 'koalab-quote' ); ?></p>
		<?php klbq_render_brand_fields( klbq_company(), 'klbq_company' ); ?>
		<?php submit_button(); ?>
	</form>
	<?php
}

/**
 * Fields of one brand (the company form uses it with "klbq_company").
 *
 * @param array  $brand Brand.
 * @param string $field Base name of the posted fields, e.g. klbq_company.
 */
function klbq_render_brand_fields( $brand, $field ) {
	$field     = preg_replace( '/[^A-Za-z0-9_\[\]]/', '', (string) $field );
	$slug      = trim( preg_replace( '/[^A-Za-z0-9_]+/', '_', $field ), '_' );
	$name      = function ( $key ) use ( $field ) {
		return $field . '[' . $key . ']';
	};
	$id        = function ( $key ) use ( $slug ) {
		return $slug . '_' . $key;
	};
	$labels    = klbq_settings();
	$templates = klbq_templates();
	$logo      = klbq_brand_logo( $brand );
	?>
	<input type="hidden" name="<?php echo esc_attr( $name( 'id' ) ); ?>" value="<?php echo esc_attr( $brand['id'] ); ?>">
	<table class="form-table klbq-brand-table" role="presentation">
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'name' ) ); ?>"><?php esc_html_e( 'Company name', 'koalab-quote' ); ?></label></th>
			<td><input type="text" class="regular-text" id="<?php echo esc_attr( $id( 'name' ) ); ?>" name="<?php echo esc_attr( $name( 'name' ) ); ?>" value="<?php echo esc_attr( $brand['name'] ); ?>" required></td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'tax_id' ) ); ?>"><?php echo esc_html( $labels['company_tax_label'] ); ?></label></th>
			<td><input type="text" class="regular-text" id="<?php echo esc_attr( $id( 'tax_id' ) ); ?>" name="<?php echo esc_attr( $name( 'tax_id' ) ); ?>" value="<?php echo esc_attr( $brand['tax_id'] ); ?>"></td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'address' ) ); ?>"><?php esc_html_e( 'Address', 'koalab-quote' ); ?></label></th>
			<td><input type="text" class="large-text" id="<?php echo esc_attr( $id( 'address' ) ); ?>" name="<?php echo esc_attr( $name( 'address' ) ); ?>" value="<?php echo esc_attr( $brand['address'] ); ?>"></td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'phone' ) ); ?>"><?php esc_html_e( 'Phone / WhatsApp', 'koalab-quote' ); ?></label></th>
			<td><input type="text" class="regular-text" id="<?php echo esc_attr( $id( 'phone' ) ); ?>" name="<?php echo esc_attr( $name( 'phone' ) ); ?>" value="<?php echo esc_attr( $brand['phone'] ); ?>">
				<p class="description"><?php esc_html_e( 'Used when the sales advisor has no phone or email of their own.', 'koalab-quote' ); ?></p></td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'email' ) ); ?>"><?php esc_html_e( 'Email', 'koalab-quote' ); ?></label></th>
			<td><input type="email" class="regular-text" id="<?php echo esc_attr( $id( 'email' ) ); ?>" name="<?php echo esc_attr( $name( 'email' ) ); ?>" value="<?php echo esc_attr( $brand['email'] ); ?>"></td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'website' ) ); ?>"><?php esc_html_e( 'Website', 'koalab-quote' ); ?></label></th>
			<td><input type="text" class="regular-text" id="<?php echo esc_attr( $id( 'website' ) ); ?>" name="<?php echo esc_attr( $name( 'website' ) ); ?>" value="<?php echo esc_attr( $brand['website'] ); ?>"></td>
		</tr>
		<tr>
			<th scope="row"><?php esc_html_e( 'Logo', 'koalab-quote' ); ?></th>
			<td class="klbq-logo-field">
				<input type="hidden" class="klbq-logo-id" name="<?php echo esc_attr( $name( 'logo_id' ) ); ?>" value="<?php echo esc_attr( (string) $brand['logo_id'] ); ?>">
				<img class="klbq-logo-preview" src="<?php echo esc_url( $logo ); ?>" alt="" <?php echo $logo ? '' : 'hidden'; ?>>
				<p>
					<button type="button" class="button klbq-logo-pick"><?php esc_html_e( 'Choose logo', 'koalab-quote' ); ?></button>
					<button type="button" class="button-link klbq-logo-clear"><?php esc_html_e( 'Use the site logo', 'koalab-quote' ); ?></button>
				</p>
				<p class="description"><?php esc_html_e( 'PNG or JPG from the media library. Without one, the site logo is used.', 'koalab-quote' ); ?></p>
			</td>
		</tr>
		<tr>
			<th scope="row"><?php esc_html_e( 'Colors', 'koalab-quote' ); ?></th>
			<td>
				<label><input type="color" name="<?php echo esc_attr( $name( 'color' ) ); ?>" value="<?php echo esc_attr( $brand['color'] ); ?>"> <?php esc_html_e( 'Main', 'koalab-quote' ); ?></label>
				&nbsp;&nbsp;
				<label><input type="color" name="<?php echo esc_attr( $name( 'accent' ) ); ?>" value="<?php echo esc_attr( $brand['accent'] ); ?>"> <?php esc_html_e( 'Accent', 'koalab-quote' ); ?></label>
			</td>
		</tr>
		<tr>
			<th scope="row"><label for="<?php echo esc_attr( $id( 'template' ) ); ?>"><?php esc_html_e( 'Template', 'koalab-quote' ); ?></label></th>
			<td>
				<select id="<?php echo esc_attr( $id( 'template' ) ); ?>" name="<?php echo esc_attr( $name( 'template' ) ); ?>">
					<?php foreach ( $templates as $slug => $label ) : ?>
						<option value="<?php echo esc_attr( $slug ); ?>" <?php selected( $brand['template'], $slug ); ?>><?php echo esc_html( $label ); ?></option>
					<?php endforeach; ?>
				</select>
				<?php do_action( 'klbq_brand_template_field', $brand ); ?>
			</td>
		</tr>
		<?php do_action( 'klbq_brand_fields', $brand, $field, $name, $id ); ?>
	</table>
	<?php
}

/**
 * Product name shown in the admin (white label may change it).
 *
 * @return string
 */
function klbq_product_name() {
	return (string) apply_filters( 'klbq_product_name', 'Koalab Quote' );
}