/**
 * LearnDash Block ld-navigation
 *
 * @since 4.0.0
 * @package LearnDash
 */

/**
 * LearnDash block functions
 */
import {
	ldlms_get_custom_label,
	ldlms_get_post_edit_meta,
	ldlms_get_block_legacy_support_panel,
} from "../ldlms.js";

/**
 * Internal block libraries
 */
import { __, _x, sprintf} from '@wordpress/i18n';
import { registerBlockType } from '@wordpress/blocks';
import { InspectorControls, useBlockProps } from '@wordpress/block-editor';
import { PanelBody, TextControl, ToggleControl, PanelRow, Disabled } from '@wordpress/components';
import ServerSideRender from '@wordpress/server-side-render';
import { useMemo } from "@wordpress/element";

const block_key   = 'learndash/ld-navigation';
const block_title = sprintf(
	// translators: placeholder: Course.
	_x('LearnDash %s Navigation', 'placeholder: Course', 'learndash'), ldlms_get_custom_label('course')
);

registerBlockType(block_key, {
	title: block_title,
	description: sprintf(
		// translators: placeholder: Course.
		_x(
			"This block displays the %s Navigation.",
			"placeholder: Course",
			"learndash"
		),
		ldlms_get_custom_label("course")
	),
	icon: "format-aside",
	category: "learndash-blocks",
	example: {
		attributes: {
			example_show: 1,
		},
	},
	supports: {
		customClassName: false,
	},
	apiVersion: 3,
	attributes: {
		course_id: {
			type: "string",
			default: "",
		},
		post_id: {
			type: "string",
			default: "",
		},
		preview_show: {
			type: "boolean",
			default: 1,
		},
		preview_post_id: {
			type: "string",
			default: "",
		},
		example_show: {
			type: "boolean",
			default: 0,
		},
		editing_post_meta: {
			type: "object",
		},
	},
	edit: (props) => {
		const {
			attributes: {
				course_id,
				post_id,
				preview_show,
				preview_post_id,
				example_show,
			},
			setAttributes,
		} = props;

		const blockProps = useBlockProps();

		const inspectorControls = (
			<InspectorControls key="controls">
				{ldlms_get_block_legacy_support_panel()}
				<PanelBody title={__("Settings", "learndash")}>
					<TextControl
						label={sprintf(
							// translators: placeholder: Course.
							_x("%s ID", "placeholder: Course", "learndash"),
							ldlms_get_custom_label("course")
						)}
						help={sprintf(
							// translators: placeholders: Course, Course.
							_x(
								"Enter single %1$s ID. Leave blank if used within a %2$s.",
								"placeholders: Course, Course",
								"learndash"
							),
							ldlms_get_custom_label("course"),
							ldlms_get_custom_label("course")
						)}
						value={course_id || ""}
						type={"number"}
						onChange={function (new_course_id) {
							if (new_course_id != "" && new_course_id < 0) {
								setAttributes({ course_id: "0" });
							} else {
								setAttributes({ course_id: new_course_id });
							}
						}}
					/>
					<TextControl
						label={__("Step ID", "learndash")}
						help={sprintf(
							// translators: placeholder: Course.
							_x(
								"Enter single Step ID. Leave blank if used within a %s.",
								"placeholder: Course",
								"learndash"
							),
							ldlms_get_custom_label("course")
						)}
						value={post_id || ""}
						type={"number"}
						onChange={function (new_post_id) {
							if (new_post_id != "" && new_post_id < 0) {
								setAttributes({ post_id: "0" });
							} else {
								setAttributes({ post_id: new_post_id });
							}
						}}
					/>
				</PanelBody>
				<PanelBody title={__("Preview", "learndash")} initialOpen={false}>
					<ToggleControl
						label={__("Show Preview", "learndash")}
						checked={!!preview_show}
						onChange={(preview_show) => setAttributes({ preview_show })}
					/>

					<PanelRow className="learndash-block-error-message">
						{__("Preview settings are not saved.", "learndash")}
					</PanelRow>

					<TextControl
						label={__("Step ID", "learndash")}
						help={__("Enter a Step ID to test preview", "learndash")}
						value={preview_post_id || ""}
						type={"number"}
						onChange={function (preview_new_post_id) {
							if (preview_new_post_id != "" && preview_new_post_id < 0) {
								setAttributes({ preview_post_id: "0" });
							} else {
								setAttributes({ preview_post_id: preview_new_post_id });
							}
						}}
					/>
				</PanelBody>
			</InspectorControls>
		);

		function get_default_message() {
			return sprintf(
				// translators: placeholder: block_title.
				_x(
					"%s block output shown here",
					"placeholder: block_title",
					"learndash"
				),
				block_title
			);
		}

		function empty_response_placeholder_function(props) {
			return get_default_message();
		}

		function do_serverside_render(attributes) {
			if (attributes.preview_show == true) {
				// We add the meta so the server knowns what is being edited.
				attributes.editing_post_meta = ldlms_get_post_edit_meta();

				return (
					<ServerSideRender
						block={block_key}
						attributes={attributes}
						key={block_key}
						EmptyResponsePlaceholder={empty_response_placeholder_function}
					/>
				);
			} else {
				return get_default_message();
			}
		}

		return (
			<div { ...blockProps }>
				{ inspectorControls }
				<Disabled>
					{ useMemo(() => do_serverside_render(props.attributes), [props.attributes]) }
				</Disabled>
			</div>
		);
	},

	save: (props) => {
		delete props.attributes.example_show;
		delete props.attributes.editing_post_meta;
	},
});
