import { addListener, assign, createElement, detachNode, insertNode, proto, removeListener } from "svelte/shared.js";

function create_main_fragment(state, component) {
	var input;

	function input_change_handler() {
		component.set({ foo: input.checked });
	}

	return {
		create: function() {
			input = createElement("input");
			this.hydrate();
		},

		hydrate: function(nodes) {
			input.type = "checkbox";
			addListener(input, "change", input_change_handler);
		},

		mount: function(target, anchor) {
			insertNode(input, target, anchor);

			input.checked = state.foo;
		},

		update: function(changed, state) {
			input.checked = state.foo;
		},

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

		destroy: function() {
			removeListener(input, "change", input_change_handler);
		}
	};
}

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;