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

function create_main_fragment(state, component) {
	var if_block_anchor;

	var current_block_type = select_block_type(state);
	var if_block = current_block_type(state, component);

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

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

		update: function(changed, state) {
			if (current_block_type !== (current_block_type = select_block_type(state))) {
				if_block.unmount();
				if_block.destroy();
				if_block = current_block_type(state, component);
				if_block.create();
				if_block.mount(if_block_anchor.parentNode, if_block_anchor);
			}
		},

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

		destroy: function() {
			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 create_if_block_1(state, component) {
	var p, text;

	return {
		create: function() {
			p = createElement("p");
			text = createText("not foo!");
		},

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

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

		destroy: noop
	};
}

function select_block_type(state) {
	if (state.foo) return create_if_block;
	return create_if_block_1;
}

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

	this._observers = {
		pre: Object.create(null),
		post: Object.create(null)
	};

	this._handlers = Object.create(null);

	this._root = options._root || this;
	this._yield = options._yield;
	this._bind = options._bind;

	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;