/**
 * Extend the Klarna Checkout plugin settings.
 */
add_filter( 'kco_wc_gateway_settings', 'kcoepm_form_fields' );
function kcoepm_form_fields( $settings ) {
	$settings['epm_bacs_settings_title'] = array(
		'title' => __( 'External Payment Method - Direct Bank Transfer', 'kco-epm-wc' ),
		'type'  => 'title',
	);
	$settings['epm_bacs_name']           = array(
		'title'       => __( 'Payment method name*', 'kco-epm-wc' ),
		'type'        => 'text',
		// https://docs.klarna.com/klarna-checkout/in-depth-knowledge/external-payment-methods/#external-payment-methods-in-klarna-checkout-supported-external-payment-methods-in-kco
		'description' => __( 'The name of the payment method exactly as it appears in the Klarna documentation. <b>This field is mandatory</b>.', 'kco-epm-wc' ),
		'default'     => __( 'Bank Transfer', 'kco-epm-wc' ),
	);
	$settings['epm_bacs_id']             = array(
		'title'       => __( 'Payment method ID*', 'kco-epm-wc' ),
		'type'        => 'text',
		'description' => __( 'The ID of the relevant WooCommerce payment method. For example, for "Direct bank transfer", the ID is "bacs". <b>This field is mandatory</b>.', 'kco-epm-wc' ),
		'default'     => __( 'bacs', 'kco-epm-wc' ),
	);
	$settings['epm_bacs_description']    = array(
		'title'       => __( 'Description', 'kco-epm-wc' ),
		'type'        => 'textarea',
		'description' => __( 'Add a description under the payment method. If omitted, Klarna will use a default description.', 'kco-epm-wc' ),
		'default'     => '',
	);
	$settings['epm_bacs_img_url']        = array(
		'title'       => __( 'Image URL', 'kco-epm-wc' ),
		'type'        => 'text',
		'description' => __( 'A URL to the payment icon (optional).', 'kco-epm-wc' ),
		'default'     => '',
	);
	$settings['epm_bacs_disable_button'] = array(
		'title'       => __( 'Disable other gateway button', 'kco-epm-wc' ),
		'type'        => 'checkbox',
		'description' => __( 'Whether the "Select another Payment method" button on the Klarna Checkout should be disabled.', 'kco-epm-wc' ),
		'default'     => 'no',
	);

	return $settings;
}

/**
 * Add Direct Transfer as payment method to the KCO iframe.
 */
add_filter( 'kco_wc_api_request_args', 'kcoepm_create_order_bacs' );
function kcoepm_create_order_bacs( $request_args ) {
	$kco_settings = get_option( 'woocommerce_kco_settings' );
	$name         = $kco_settings['epm_bacs_name'] ?? '';
	$id           = $kco_settings['epm_bacs_id'] ?? '';
	$image_url    = $kco_settings['epm_bacs_img_url'] ?? '';
	$description  = $kco_settings['epm_bacs_description'] ?? '';

	$klarna_external_payment = array(
		// The name is MANDATORY and must match exactly one of the payment method names as they appear in the Klarna documentation:
		// https://docs.klarna.com/klarna-checkout/in-depth-knowledge/external-payment-methods/#external-payment-methods-in-klarna-checkout-supported-external-payment-methods-in-kco.
		'name'         => $name,
		'image_url'    => $image_url,
		'description'  => $description,
		'redirect_url' => add_query_arg(
			array(
				'kco-external-payment' => $id,
				'order_id'             => isset( $request_args['merchant_reference2'] ) ? $request_args['merchant_reference2'] : '{checkout.order.id}',
			),
			wc_get_checkout_url()
		),
	);

	$klarna_external_payment                  = array( $klarna_external_payment );
	$request_args['external_payment_methods'] = $klarna_external_payment;

	return $request_args;
}


add_action( 'init', 'kcoepm_remove_other_gateway_button' );
function kcoepm_remove_other_gateway_button() {
	$kco_settings   = get_option( 'woocommerce_kco_settings' );
	$disable_button = isset( $kco_settings['epm_bacs_disable_button'] ) ? $kco_settings['epm_bacs_disable_button'] : 'no';
	if ( 'yes' === $disable_button ) {
		remove_action( 'kco_wc_after_order_review', 'kco_wc_show_another_gateway_button', 20 );
	}
}