/*
 * L.Control is a base class for implementing map controls. Handles positioning.
 * All other controls extend from this class.
 */

L.Control = L.Class.extend({
	options: {
		position: 'topright'
	},

	initialize: function (options) {
		L.setOptions(this, options);
	},

	getPosition: function () {
		return this.options.position;
	},

	setPosition: function (position) {
		var map = this._map;

		if (map) {
			map.removeControl(this);
		}

		this.options.position = position;

		if (map) {
			map.addControl(this);
		}

		return this;
	},

	getContainer: function () {
		return this._container;
	},

	addTo: function (map) {
		this.remove();
		this._map = map;

		var container = this._container = this.onAdd(map),
		    pos = this.getPosition(),
		    corner = map._controlCorners[pos];

		L.DomUtil.addClass(container, 'leaflet-control');

		if (pos.indexOf('bottom') !== -1) {
			corner.insertBefore(container, corner.firstChild);
		} else {
			corner.appendChild(container);
		}

		return this;
	},

	remove: function () {
		if (!this._map) {
			return this;
		}

		L.DomUtil.remove(this._container);

		if (this.onRemove) {
			this.onRemove(this._map);
		}

		this._map = null;

		return this;
	},

	isVisible: function () {
		if (!this._map) {
			return false;
		}
		var corner = this._map._controlCorners[this.options.position];
		return corner.hasChildNodes();
	},

	_refocusOnMap: function () {
		this._map.focus();
	}
});

L.control = function (options) {
	return new L.Control(options);
};


// adds control-related methods to L.Map

L.Map.include({
	addControl: function (control) {
		control._map = this;
		var controlDiv = control.onAdd(this);
		var controlContainer = L.DomUtil.get(this.options.toolbarContainer);
		if (!this._controls) {
			this._controls = [];
		}

		if (controlContainer && controlDiv) {
			controlContainer.appendChild(controlDiv);
			this._controls.push({div: controlDiv});
		}
		return this;
	},

	removeControl: function (control) {
		control.remove();
		return this;
	},

	removeControls: function () {
		if (this._controls) {
			this._controls.forEach(function (control) {
				L.DomUtil.remove(control.div);
			});
		}
	},

	_initControlPos: function () {
		var corners = this._controlCorners = {},
		    l = 'leaflet-',
		    container = this._controlContainer =
		            L.DomUtil.create('div', l + 'control-container', this._container);

		function createCorner(vSide, hSide) {
			var className = l + vSide + ' ' + l + hSide;

			corners[vSide + hSide] = L.DomUtil.create('div', className, container);
		}

		createCorner('top', 'left');
		createCorner('top', 'middle');
		createCorner('top', 'right');
		createCorner('bottom', 'left');
		createCorner('bottom', 'right');
	},

	_clearControlPos: function () {
		L.DomUtil.remove(this._controlContainer);
	}
});
