window.onload = function () {
	$('.dropdown li > a').click(function(e){
		setDropdownButtonText(this.innerHTML, this.parentElement.parentElement.parentElement) //set the display-text to the selected value
		fillDropdownByValue(this.innerHTML, $(".dropdown")["1"])
	});
	
	customizeUploadButton()
}

//function fillDropdownByValue(value, dropdownToFill) {
//	dropdownToFill.getElementsByClassName("text")[0].innerHTML = "Subcategory"
//	var dropdownToFillUl = dropdownToFill.getElementsByClassName("dropdown-menu")[0]
//	dropdownToFillUl.innerHTML = ""
//
//	subCategory = getDescriptorByLocalString("english", value)
//	catList = document.getElementById("subcategory_list")
//	catList.innerHTML = ""
//	categories = global_categories[subCategory].sort()
//	for(var key in categories) {
//		var newEntry = document.createElement("li")
//		var newEntryLink = document.createElement("a")
//		newEntry.setAttribute("role", "presentation")
//		newEntryLink.setAttribute("role", "menuitem")
//		newEntryLink.tabIndex = -1
//		newEntryLink.href = "#"
//		newEntryLink.innerHTML = getLocalString("english", categories[key])
//		newEntryLink.onclick = function(){ setDropdownButtonText(this.innerHTML, this.parentElement.parentElement.parentElement) }
//		newEntry.appendChild(newEntryLink)
//		dropdownToFillUl.appendChild(newEntry)
//	}
//}

function setDropdownButtonText(text, dropdownButton) {
	var dropdownTextSpan = dropdownButton.getElementsByClassName("text")[0]
	dropdownTextSpan.innerHTML = text
}

function sortCategories(categories) {
	var sortedCategories = []
	for(var key in categories) {
		sortedCategories.push(categories[key])
	}
	sortedCategories.sort()
	return sortedCategories
}

// Fill a defined dropdown with values.
// These values will be generated out of the categories.json
function fillDropdownByValue(value, dropdownToFill) {
	dropdownToFill.getElementsByTagName("button")[0].disabled = false
	dropdownToFill.getElementsByClassName("text")[0].innerHTML = "Subcategorie"
	var dropdownToFillUl = dropdownToFill.getElementsByClassName("dropdown-menu")[0]
	dropdownToFillUl.innerHTML = ""
	valueDescriptor = getDescriptorByLocalString("english", value)
	subcategories = global_categories[valueDescriptor]
	subcategories = sortCategories(subcategories)
	for(subcategoryIndex in subcategories) {
		subcategoryLocalString = getLocalString("english", subcategories[subcategoryIndex])
		var newEntry = document.createElement("li")
		var newEntryLink = document.createElement("a")
		newEntry.setAttribute("role", "presentation")
		newEntryLink.setAttribute("role", "menuitem")
		newEntryLink.tabIndex = -1
		newEntryLink.href = "#"
		newEntryLink.innerHTML = subcategoryLocalString
		newEntryLink.onclick = function(){ setDropdownButtonText(this.innerHTML, this.parentElement.parentElement.parentElement) }
		newEntry.appendChild(newEntryLink)
		dropdownToFillUl.appendChild(newEntry)
	}
}

// Hides the default browser-upload-form and replaces it by an button
function customizeUploadButton() {
	$("input.file").before('<button id="button-file" type="button" class="btn btn-default"><span class="text">Upload...</span><span class="glyphicon glyphicon-open-file" aria-hidden="true"></span></button>');
	$("input.file").hide();
	$('body').on('click', '#button-file', function() {
			$("input.file").trigger('click');
	});
}

// This sets the Uploadbutton to the filename of the uploaded file
function setButtonToFilename(event) {
	$("input[name='torrentFile']").each(function() {
		var fileName = $(this).val().split('/').pop().split('\\').pop();
		console.log(event["target"]);
		targetInput = event["target"]
		button = targetInput.previousSibling.getElementsByClassName("text")[0]
		button.innerHTML = chunk(fileName, 40)
	});
}

// Sets the text of a given dropdown-button to a given value
function setDropdownButtonText(text, dropdownButton) {
	var dropdownTextSpan = dropdownButton.getElementsByClassName("text")[0]
	dropdownHiddenValue = dropdownButton.getElementsByTagName("input")[0]
	dropdownHiddenValue.setAttribute("value", getDescriptorByLocalString("english", text))
	dropdownTextSpan.innerHTML = text
}

function validateForm() {
	valid = true
	file = document.querySelectorAll("input.file")[0]
	category = document.querySelectorAll("input.category")[0]
	subcategory = document.querySelectorAll("input.subcategory")[0]
	torrentname = document.querySelectorAll("input.name")[0]
	description = document.querySelectorAll("textarea.description")[0]
	if(file.value.length <= 0) { valid = false }
	if(category.value.length <= 0) { valid = false }
	if(subcategory.value.length <= 0) { valid = false }
	if(torrentname.value.length <= 0) { valid = false }
	if(description.value.length <= 0) { valid = false }

	return false;
}

function chunk(string, n) {
	var ret = "";
	for(var i=0, len=string.length; i < len; i += n) {
		if(i==0) {
			ret = string.substr(i, n)
		} else {
			ret += "<br/>" + string.substr(i, n)
		}
	}
	return ret
};