import { appendNode, assign, createComment, createElement, createText, detachNode, init, insertNode, noop, proto } from "svelte/shared.js";

function create_main_fragment(state, component) {
	var if_block_anchor;

	var if_block = (state.foo) && create_if_block(state, component);

	return {
		create: function() {
			if (if_block) if_block.create();
			if_block_anchor = createComment();
		},

		mount: function(target, anchor) {
			if (if_block) if_block.mount(target, anchor);
			insertNode(if_block_anchor, target, anchor);
		},

		update: function(changed, state) {
			if (state.foo) {
				if (!if_block) {
					if_block = create_if_block(state, component);
					if_block.create();
					if_block.mount(if_block_anchor.parentNode, if_block_anchor);
				}
			} else if (if_block) {
				if_block.unmount();
				if_block.destroy();
				if_block = null;
			}
		},

		unmount: function() {
			if (if_block) if_block.unmount();
			detachNode(if_block_anchor);
		},

		destroy: function() {
			if (if_block) if_block.destroy();
		}
	};
}

function create_if_block(state, component) {
	var p, text;

	return {
		create: function() {
			p = createElement("p");
			text = createText("foo!");
		},

		mount: function(target, anchor) {
			insertNode(p, target, anchor);
			appendNode(text, p);
		},

		unmount: function() {
			detachNode(p);
		},

		destroy: noop
	};
}

function SvelteComponent(options) {
	init(this, options);
	this._state = options.data || {};

	this._fragment = create_main_fragment(this._state, this);

	if (options.target) {
		this._fragment.create();
		this._fragment.mount(options.target, options.anchor || null);
	}
}

assign(SvelteComponent.prototype, proto);

export default SvelteComponent;