/* city, county, and state function */
var _stateSelect = null;
var _countySelect = null;
var _citySelect = null;

var _state_id = 1;
var _state = "";

var _states = new Array();
var _counties = new Array();

var State = Class.create();
State.prototype=
{
	initialize: function(id, name)
	{
		this.id = id;
		this.name = name;
		this.counties = new Array();
	},
	
	addCounty: function(county)
	{
		this.counties[this.counties.length] = county;
	},
	
	createOption: function()
	{
		return new Option(this.name, this.id);
	},
		
	createCountyOptions: function()
	{
		if(this.counties.length == 0)
		{
			ajaxEngine.sendRequest('doStateUpdate', "state_id=" + this.id, "object_id=stateUpdater");
		}
		else
		{
			var size = _countySelect.options.length;
			for(var i = 0; i < this.counties.length; i++)
			{
				_countySelect.options[i+1] = this.counties[i].createOption();
			}
			
			//remove any other counties from the previous county listing
			for(var i = this.counties.length; i < size; i++)
			{
				_countySelect.options[this.counties.length+1] = null;
			}
		}
	},
	
	getCountyById: function(county_id)
	{
		for(var i = 0; i < this.counties.length; i++)
		{
			if(this.counties[i].id == county_id)
			{
				return this.counties[i];
			}
		}
		
		return null;
	}
};

var County = Class.create();
County.prototype=
{
	initialize: function(id, name, lat, lng, state_id)
	{
		this.id = id;
		this.name = name;
		this.lat = lat;
		this.lng = lng;
		this.state_id = state_id;
		this.cities = new Array();
	},
	
	addCity: function(city)
	{
		this.cities[this.cities.length] = city;
	},
	
	createOption: function()
	{
		return new Option(this.name, this.id);
	},
	
	createCityOptions: function()
	{
		if(this.cities.length == 0)
		{
			ajaxEngine.sendRequest('doCountyUpdate', "county_id="+this.id, "state_id=" + this.state_id, "object_id=countyUpdater");
		}
		else
		{
			var size = _citySelect.options.length;
			for(var i = 0; i < this.cities.length; i++)
			{
				_citySelect.options[i+1] = this.cities[i].createOption();
			}
			
			//remove any other cities from the previous county listing
			for(var i = this.cities.length; i < size; i++)
			{
				_citySelect.options[this.cities.length+1] = null;
			}
		}
	},
	
	getCityById: function(city_id)
	{
		for(var i = 0; i < this.cities.length; i++)
		{
			if(this.cities[i].id == city_id)
			{
				return this.cities[i];
			}
		}
		
		return null;
	},
	
	getCityByZip: function(zip)
	{
		for(var i = 0; i < this.cities.length; i++)
		{
			if(this.cities[i].zip == zip)
			{
				return this.cities[i];
			}
		}
		
		return null;
	}
};

var City = Class.create();
City.prototype=
{
	initialize: function(id, name, zip, lat, lng)
	{
		this.id = id;
		this.name = name;
		this.zip = zip;
		this.lat = lat;
		this.lng = lng;
	},
	
	createOption: function()
	{
		return new Option(this.zip+" - "+this.name, this.id);
	}
};

		_counties[_counties.length] = new County(2905, 'Beaver', 38.2769, -112.641, _state_id);
		_counties[_counties.length] = new County(2893, 'Box Elder', 41.5005, -112.958, _state_id);
		_counties[_counties.length] = new County(2894, 'Cache', 41.8153, -111.997, _state_id);
		_counties[_counties.length] = new County(2895, 'Carbon', 39.6408, -110.561, _state_id);
		_counties[_counties.length] = new County(2889, 'Daggett', 40.8278, -109.525, _state_id);
		_counties[_counties.length] = new County(2885, 'Davis', 40.9635, -112.116, _state_id);
		_counties[_counties.length] = new County(2881, 'Duchesne', 40.1634, -110.401, _state_id);
		_counties[_counties.length] = new County(2897, 'Emery', 38.9231, -111.252, _state_id);
		_counties[_counties.length] = new County(2904, 'Garfield', 40.7261, -112.163, _state_id);
		_counties[_counties.length] = new County(2898, 'Grand', 38.9999, -109.615, _state_id);
		_counties[_counties.length] = new County(2906, 'Iron', 37.8116, -113.26, _state_id);
		_counties[_counties.length] = new County(2902, 'Juab', 39.6631, -112.816, _state_id);
		_counties[_counties.length] = new County(2903, 'Kane', 37.2719, -111.77, _state_id);
		_counties[_counties.length] = new County(2901, 'Millard', 39.0644, -113.032, _state_id);
		_counties[_counties.length] = new County(2887, 'Morgan', 41.0422, -111.68, _state_id);
		_counties[_counties.length] = new County(2909, 'Piute', 38.3289, -112.143, _state_id);
		_counties[_counties.length] = new County(2890, 'Rich', 41.5713, -111.279, _state_id);
		_counties[_counties.length] = new County(2883, 'Salt Lake', 40.6682, -111.908, _state_id);
		_counties[_counties.length] = new County(2896, 'San Juan', 37.7491, -110.227, _state_id);
		_counties[_counties.length] = new County(2900, 'Sanpete', 39.4225, -111.632, _state_id);
		_counties[_counties.length] = new County(2899, 'Sevier', 38.5894, -112.258, _state_id);
		_counties[_counties.length] = new County(2886, 'Summit', 40.6517, -111.505, _state_id);
		_counties[_counties.length] = new County(2888, 'Tooele', 40.5343, -112.298, _state_id);
		_counties[_counties.length] = new County(2884, 'Uintah', 41.1435, -111.931, _state_id);
		_counties[_counties.length] = new County(2882, 'Utah', 40.177, -111.536, _state_id);
		_counties[_counties.length] = new County(2891, 'Wasatch', 40.2953, -111.256, _state_id);
		_counties[_counties.length] = new County(2908, 'Washington', 37.1304, -113.497, _state_id);
		_counties[_counties.length] = new County(2907, 'Wayne', 38.3301, -110.867, _state_id);
		_counties[_counties.length] = new County(2892, 'Weber', 41.2552, -111.957, _state_id);

var _countyUpdater = null;
var _stateUpdater = null;
function initLocation(countySelect, citySelect, stateSelect)
{
	_countySelect = countySelect;
	_citySelect = citySelect;
	_stateSelect = stateSelect;
	
	for(var i = 0; i < _counties.length; i++)
	{
		_countySelect.options[i+1] = _counties[i].createOption();
	}
	
	if(citySelect != null)
	{
		_countySelect.onchange = function(){ updateCitySelect(); };
	}
	
	if(_stateSelect != null)
	{
		for(var i = 0; i < _states.length; i++)
		{
			_stateSelect.options[i+1] = _states[i].createOption();
		}
		
		_stateSelect.onchange = function(){ updateCountySelect(); };
		_stateUpdater = new StateUpdater();
	}
	
	_countyUpdater = new CountyUpdater();
}


var CountyUpdater = Class.create();
CountyUpdater.prototype=
{
	initialize: function()
	{
		this.cb = null;
		ajaxEngine.registerRequest('doCountyUpdate', '/ajax/city_list.php');
		ajaxEngine.registerAjaxObject("countyUpdater", this);
	},
	getByZip: function(zip)
	{
		ajaxEngine.sendRequest('doCountyUpdate', "zip="+zip, "state_id=" + _state_id, "object_id=countyUpdater");
	},
	ajaxUpdate: function(ajaxResponse)
	{
		var countyId = 0;
		var city = ajaxResponse.childNodes[0];
		var cities = city.childNodes;
		if(cities.length > 0)
		{
			countyId = city.getAttribute("county_id");
			var county = getCountyById(countyId);
			if(county != null)
			{
				for(var i = 0; i < cities.length; i++)
				{
					var city = cities[i];
					county.addCity(new City(city.getAttribute("id"), city.firstChild.nodeValue, city.getAttribute("zip"), city.getAttribute("lat"), city.getAttribute("lng")));
				}
				
				county.createCityOptions();
			}
		}
		
		if(this.cb != null)
		{
			this.cb(countyId);
		}
	}
};

var StateUpdater = Class.create();
StateUpdater.prototype=
{
	initialize: function()
	{
		this.cb = null;
		ajaxEngine.registerRequest('doStateUpdate', '/ajax/county_list.php');
		ajaxEngine.registerAjaxObject("stateUpdater", this);
	},
	
	ajaxUpdate: function(ajaxResponse)
	{
		var countyList = ajaxResponse.childNodes[0];
		var counties = countyList.childNodes;
		if(counties.length > 0)
		{
			var stateId = countyList.getAttribute("state_id");
			var state = getStateById(stateId);
			if(state != null)
			{
				for(var i = 0; i < counties.length; i++)
				{
					var county = counties[i];
					state.addCounty(new County(county.getAttribute("id"), county.firstChild.nodeValue, county.getAttribute("lat"), county.getAttribute("lng"), state.id));
				}
				
				state.createCountyOptions();
			}
		}
		
		if(this.cb != null)
		{
			this.cb();
		}
	}
};

function getCountyById(county_id)
{
	if(_states.length == 0)
	{
		for(var i = 0; i < _counties.length; i++)
		{
			if(_counties[i].id == county_id)
			{
				return _counties[i];
			}
		}
	}
	else
	{
		var state = getSelectedState();
		return state.getCountyById(county_id);
	}
	
	return null;
}

function getStateById(state_id)
{
	for(var i = 0; i < _states.length; i++)
	{
		if(_states[i].id == state_id)
		{
			return _states[i];
		}
	}
	
	return null;
}

function updateCitySelect()
{
	var countyId = _countySelect.options[_countySelect.selectedIndex].value;
	var county = getCountyById(countyId);
	if(county != null)county.createCityOptions();
}

function updateCountySelect()
{
	var stateId = _stateSelect.options[_stateSelect.selectedIndex].value;
	var state = getStateById(stateId);
	if(state != null)state.createCountyOptions();
}

function getSelectedCounty()
{
	var countyId = _countySelect.options[_countySelect.selectedIndex].value;
	if(_states.length == 0)
	{
		return getCountyById(countyId);
	}
	else
	{
		var state = getSelectedState();
		return state.getCountyById(countyId);
	}
}

function getSelectedCity()
{
	var county = getSelectedCounty();
	if(county == null)
	{
		return null;
	}
	
	var cityId = _citySelect.options[_citySelect.selectedIndex].value;
	return county.getCityById(cityId);
}

function getSelectedState()
{
	var stateId = _stateSelect.options[_stateSelect.selectedIndex].value;
	return getStateById(stateId);
}