// Special directions
var special_directions = {
	'Zajezdnia Nowa Huta' : 'NH',
	'Zajezdnia Podgórze' : 'P',
};

/* Check for website updates */
function checkVersion() {
	$.get('version.php');
	setTimeout(checkVersion, 600000);
}

/* Parsing of received JSON parts */
function parseStatus(status) {
	switch(status.status) {
		case 'STOPPING':
			return lang.boarding_sign;
		case 'PREDICTED':
			if(status.actualRelativeTime <= 0)
				return lang.boarding_sign;
			if(status.actualRelativeTime >= 60)
				return lang.time_minutes_prefix + Math.floor(status.actualRelativeTime / 60) + lang.time_minutes_suffix;
			return lang.time_seconds_prefix + status.actualRelativeTime + lang.time_seconds_suffix;
		case 'DEPARTED':
			return lang.time_minutes_ago_prefix + Math.floor(-status.actualRelativeTime / 60) + lang.time_minutes_ago_suffix;
		default:
			return status.mixedTime;
	}
}

function parseTime(date, time) {
	var result = new Date(date.getFullYear(), date.getMonth(), date.getDay());
	var time_split = time.split(':');
	result.setHours(time_split[0]);
	result.setMinutes(time_split[1]);
	
	if(result.getTime() - date.getTime() > 72000000) {
		result.setTime(result.getTime() - 86400000);
	}
	
	if(date.getTime() - result.getTime() > 72000000) {
		result.setTime(result.getTime() + 86400000);
	}
	
	return result;
}

function parseDelay(status) {
	if(!status.actualTime) return lang.unknown_sign;
	if(!status.plannedTime) return lang.unknown_sign;
	
	var now = new Date();
	var actual = parseTime(now, status.actualTime);
	var planned = parseTime(now, status.plannedTime);
	
	return lang.time_minutes_prefix + ((actual.getTime() - planned.getTime()) / 1000 / 60) + lang.time_minutes_suffix;
}

// Webservice-related functions
function parseVehicle(vehicleId) {
	if(!vehicleId) return false;
	if(vehicleId.substr(0, 15) != '635218529567218') {
		console.log('Unknown vehicle, vehicleId=' + vehicleId);
		return false;
	}
	
	var id = parseInt(vehicleId.substr(15)) - 736;
	var prefix;
	var type;
	var low; // low floor: 0 = no, 1 - semi, 2 - full
	
	// Single exception - old id used in one case
	if(id == 831) {
		id = 216;
	}
	
	if(101 <= id && id <= 174) {
		prefix = 'HW';
		type = 'E1';
		low = 0;
		
		if((108 <= id && id <= 113) || id == 127 || id == 131 || id == 132 || id == 134 || (137 <= id && id <= 139) || (148 <= id && id <= 150) || (153 <= id && id <= 155)) {
			prefix = 'RW';
		}
	} else if(201 <= id && id <= 293) {
		prefix = 'RZ';
		type = '105Na';
		low = 0;
		
		if(246 <= id) {
			prefix = 'HZ';
		}
		if(id == 290) {
			type = '105Nb';
		}
	} else if(301 <= id && id <= 328) {
		prefix = 'RF';
		type = 'GT8S';
		low = 0;
		
		if(id == 313) {
			type = 'GT8C'
			low = 1;
		} else if(id == 323) {
			low = 1;
		}
	} else if(401 <= id && id <= 440) {
		prefix = 'HL';
		type = 'EU8N';
		low = 1;
	} else if(451 <= id && id <= 462) {
		prefix = 'HK';
		type = 'N8S-NF';
		low = 1;
		
		if((451 <= id && id <= 456) || id == 462) {
			type = 'N8C-NF';
		}
	} else if(601 <= id && id <= 650) {
		prefix = 'RP';
		type = 'NGT6 (3)';
		low = 2;
		
		if(id <= 613) {
			type = 'NGT6 (1)';
		} else if (id <= 626) {
			type = 'NGT6 (2)';
		}
	} else if(801 <= id && id <= 824) {
		prefix = 'RY';
		type = 'NGT8';
		low = 2;
	} else if(id == 899) {
		prefix = 'RY';
		type = '126N';
		low = 2;
	} else if(901 <= id && id <= 936) {
		prefix = 'RG';
		type = '2014N';
		low = 2;
		
		if(915 <= id) {
			prefix = 'HG';
		}
	} else if(id === 999) {
		prefix = 'HG';
		type = '405N-Kr';
		low = 1;
	} else {
		console.log('Unknown vehicle, vehicleId=' + vehicleId + ', id=' + id);
		return false;
	}
	
	return {
		vehicleId: vehicleId,
		prefix: prefix,
		id: id,
		num: prefix + id,
		type: type,
		low: low
	};
}

function tramIdToVehicleId(tramId) {
	if(0 <= tramId && tramId <= 999) {
		var vehicleId = '0000' + (tramId + 736);
		vehicleId = vehicleId.substr(vehicleId.length - 4)
		return '635218529567218' + vehicleId;
	}
}

function displayVehicle(vehicleInfo) {
	if(!vehicleInfo) return document.createTextNode('');
	
	var span = document.createElement('span');
	span.className = 'vehicleInfo';
	
	var floor_type = '';
	if(vehicleInfo.low == 0) {
		setText(span, lang.high_floor_sign);
		floor_type = lang.high_floor;
	} else if(vehicleInfo.low == 1) {
		setText(span, lang.partially_low_floor_sign);
		floor_type = lang.partially_low_floor;
	} else if(vehicleInfo.low == 2) {
		setText(span, lang.low_floor_sign);
		floor_type = lang.low_floor;
	}
	
	span.title = lang.tram_type_pattern
		.replace('$num', vehicleInfo.num)
		.replace('$type', vehicleInfo.type)
		.replace('$floor', floor_type);
	
	return span;
}

// Element mangling
function deleteChildren(element) {
	while(element.lastChild) element.removeChild(element.lastChild);
}

function addElementWithText(parent, element, text) {
	var elem = document.createElement(element);
	elem.appendChild(document.createTextNode(text));
	parent.appendChild(elem);
	return elem;
}

function addCellWithText(parent, text) {
	return addElementWithText(parent, 'td', text);
}

function addParaWithText(parent, text) {
	return addElementWithText(parent, 'p', text);
}

function setText(element, text) {
	deleteChildren(element);
	element.appendChild(document.createTextNode(text));
}