var globalDb = [];
var globalGroups = [];
var globalCurrentGroup = "";
var globalCurrentSelection = -1;

function Error(message)
{
	alert(message);
}

function SetEnable(id, enabled)
{
	var elem = document.getElementById(id);
	elem.disabled = !enabled;
}

function Copy(id)
{
	var elem = document.getElementById(id);

	elem.select();
	document.execCommand("copy");
}

function AESEncrypt(source, phrase)
{
	var encryptedAES = CryptoJS.AES.encrypt(source, phrase);

	return encryptedAES.toString();
}

function AESDecrypt(source, phrase)
{
	var decryptedBytes = CryptoJS.AES.decrypt(source, phrase);

	return decryptedBytes.toString(CryptoJS.enc.Latin1);
}

function Decrypt(val)
{
	var phrase = document.getElementById("PassPhrase").value;

	return AESDecrypt(val, phrase);
}

function Encrypt(val)
{
	var phrase = document.getElementById("PassPhrase").value;

	return AESEncrypt(val, phrase);
}

function WebRequest(url, func, args)
{
	var f;

	url += "?t=" + Math.random();

	for(f = 0; f < args.length; f += 2)
	{
		url += "&";
		url += args[f] + "=";
		url += encodeURIComponent(args[f+1]);
	}

	var req = new XMLHttpRequest();

	if (func)
	{
		req.addEventListener("load", func);
	}

	req.open("GET", url);
	req.send();
}

function ArrayContains(haystack, needle)
{
	for(var f = 0; f < haystack.length; f++)
	{
		if (haystack[f] === needle)
		{
			return true;
		}
	}

	return false;
}

function IsEmpty(id)
{
	var elem = document.getElementById(id);

	return elem.value == "";
}

function ShowPasswords()
{
	var elem = document.getElementById("ShowPasswords");

	return elem.checked;
}

function SetInputType(id, type)
{
	document.getElementById(id).type = type;
}

function GetGroupRows()
{
	var result = [];

	for(var f = 0; f < globalDb.length; f++)
	{
		if (globalDb[f].group == globalCurrentGroup)
		{
			result.push(globalDb[f]);
		}
	}

	return result;
}

function GetData(id)
{
	for(var f = 0; f < globalDb.length; f++)
	{
		if (globalDb[f].id == id)
		{
			return globalDb[f];
		}
	}

	return null;
}

function SetButtonState()
{
	SetEnable("Add", true);
	SetEnable("Edit", globalCurrentSelection != -1);
	SetEnable("Delete", globalCurrentSelection != -1);
	SetEnable("CopyUsername", globalCurrentSelection != -1);
	SetEnable("CopyPassword", globalCurrentSelection != -1);
}

function LoadGroups(keep_selection)
{
	globalGroups = [];

	for(var f = 0; f < globalDb.length; f++)
	{
		var group = globalDb[f].group;

		if (!ArrayContains(globalGroups, group))
		{
			globalGroups.push(group);
		}
	}

	if (!keep_selection)
	{
		globalCurrentGroup = "";
	}

	if (!ArrayContains(globalGroups, globalCurrentGroup))
	{
		if (globalGroups.length > 0)
		{
			globalCurrentGroup = globalGroups[0];
		}
		else
		{
			globalCurrentGroup = "";
		}
	}

	var elem = document.getElementById("Group");

	while(elem.length > 0)
	{
		elem.remove(0);
	}

	for(var f = 0; f < globalGroups.length; f++)
	{
		var option = document.createElement("option");

		option.text = globalGroups[f];
		option.value = globalGroups[f];

		elem.add(option);
	}

	elem.value = globalCurrentGroup;
}

function LoadDescriptions(keep_selection)
{
	var rows = GetGroupRows();
	var elem = document.getElementById("DescriptionSelect");
	var f;

	if (!keep_selection)
	{
		globalCurrentSelection = -1;
	}

	while(elem.length > 0)
	{
		elem.remove(0);
	}

	var firstid = -1;
	var selected = false;

	for(f = 0; f < rows.length; f++)
	{
		var option = document.createElement("option");

		option.text = rows[f].description;
		option.value = rows[f].id;

		if (firstid == -1)
		{
			firstid = rows[f].id;
		}

		if (globalCurrentSelection == rows[f].id)
		{
			selected = true;
		}

		elem.add(option);
	}

	if (!selected)
	{
		globalCurrentSelection = firstid;
	}

	if (globalCurrentSelection != -1)
	{
		elem.value = globalCurrentSelection;
	}
}

function LoadTable()
{
	var record = GetData(globalCurrentSelection);

	if (record != null)
	{
		var elem;

		elem = document.getElementById("Description");
		elem.value = record.description;

		elem = document.getElementById("Username");
		elem.value = record.username;

		elem = document.getElementById("Password");
		elem.value = Decrypt(record.password);
	}
}

function RefreshDataAsync()
{
	globalDb = JSON.parse(this.responseText);
	LoadGroups(true);
	LoadDescriptions(true);
	LoadTable();
	SetButtonState();
}

function RefreshData()
{
	WebRequest("get.php", RefreshDataAsync, []);
}

function LoadInitialData()
{
	LoadGroups(false);
	LoadDescriptions(false);
	LoadTable();
}

function DoLoadAsync()
{
	globalDb = JSON.parse(this.responseText);

	if (globalDb.error)
	{
		Error(globalDb.error);
		globalDb = [];
	}
	else
	{
		LoadInitialData();
		SetButtonState();
		SetEnable("ChangePassphrase", true);
	}
}

function DoLoad()
{
	if (IsEmpty("PassPhrase"))
	{
		Error("Passphrase empty");
		return;
	}

	WebRequest("get.php", DoLoadAsync, []);
	LoadInitialData();
}

function DoChangePassphraseAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
}

function DoChangePassphrase()
{
	if (IsEmpty("NewPassPhrase"))
	{
		Error("New passphrase empty");
		return;
	}

	var msg = "WARNING: If you have not successfully loaded the passwords\n";
	msg += "then this option will destroy the saved passwords.  Proceed?";

	if (confirm(msg))
	{
		var f;

		var newphrase = document.getElementById("NewPassPhrase").value;

		for(f = 0; f < globalDb.length; f++)
		{
			var password = Decrypt(globalDb[f].password);

			WebRequest("edit.php", DoChangePassphraseAsync,
			[
				"id", globalDb[f].id,
				"description", globalDb[f].description,
				"group", globalDb[f].group,
				"username", globalDb[f].username,
				"password", AESEncrypt(password, newphrase)
			]
			);
		}

		document.getElementById("NewPassPhrase").value = "";
	}
}

function DoSelectGroup()
{
	var elem = document.getElementById("Group");

	globalCurrentGroup = elem.value;
	document.getElementById("NewGroup").value = "";
	LoadDescriptions(false);
	LoadTable();
}

function DoSelectDescription()
{
	var elem = document.getElementById("DescriptionSelect");

	globalCurrentSelection = elem.value;
	LoadTable();
}

function DoAddAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		globalCurrentGroup = response.group;
		globalCurrentSelection = response.id;
		RefreshData();
	}
}

function DoAdd()
{
	if (IsEmpty("PassPhrase"))
	{
		Error("Passphrase empty");
		return;
	}

	if (IsEmpty("Group") && IsEmpty("NewGroup"))
	{
		Error("No groups defined -- please enter a group name");
		return;
	}

	var description = document.getElementById("Description").value;
	var username = document.getElementById("Username").value;
	var password = document.getElementById("Password").value;
	var group;

	if (description == "" || username == "" | password == "")
	{
		Error("Please enter the description, username and password");
		return;
	}

	if (!IsEmpty("NewGroup"))
	{
		group = document.getElementById("NewGroup").value;
		document.getElementById("NewGroup").value = "";
	}
	else
	{
		group = document.getElementById("Group").value;
	}

	WebRequest("add.php", DoAddAsync,
	[
		"description", description,
		"group", group,
		"username", username,
		"password", Encrypt(password)
	]
	);
}

function DoEditAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoEdit()
{
	var description = document.getElementById("Description").value;
	var username = document.getElementById("Username").value;
	var password = document.getElementById("Password").value;
	var group;

	if (description == "" || username == "" | password == "")
	{
		Error("Please enter the description, username and password");
		return;
	}

	if (!IsEmpty("NewGroup"))
	{
		group = document.getElementById("NewGroup").value;
		document.getElementById("NewGroup").value = "";
	}
	else
	{
		group = document.getElementById("Group").value;
	}

	WebRequest("edit.php", DoEditAsync,
	[
		"id", globalCurrentSelection,
		"description", description,
		"group", group,
		"username", username,
		"password", Encrypt(password)
	]
	);
}

function DoDeleteAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoDelete()
{
	WebRequest("delete.php", DoDeleteAsync,
	[
		"id", globalCurrentSelection
	]
	);
}

function DoCopyUsername()
{
	Copy("Username");
}

function DoCopyPassword()
{
	var id = "Password";

	if (!ShowPasswords())
	{
		SetInputType(id, "text");
	}

	Copy(id);

	if (!ShowPasswords())
	{
		SetInputType(id, "password");
	}
}

function DoShow()
{
	if (!ShowPasswords())
	{
		SetInputType("Password" + this.dataset.pmId, "text");
	}
}

function DoHide()
{
	if (!ShowPasswords())
	{
		SetInputType("Password" + this.dataset.pmId, "password");
	}
}

function DoReorderAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoUp()
{
	var id = this.dataset.pmId;
	var prev = this.dataset.pmPrevId;

	WebRequest("reorder.php", DoReorderAsync,
	[
		"from_id", id,
		"to_id", prev
	]
	);
}

function DoDown()
{
	var id = this.dataset.pmId;
	var next = this.dataset.pmNextId;

	WebRequest("reorder.php", DoReorderAsync,
	[
		"from_id", id,
		"to_id", next
	]
	);
}

function DoShowPasswords()
{
	var type;

	if (ShowPasswords())
	{
		type = "text";
	}
	else
	{
		type = "password";
	}

	SetInputType("PassPhrase", type);
	SetInputType("NewPassPhrase", type);
	SetInputType("Password", type);
	SetInputType("NewPassword", type);
}

// vim: sw=4 ts=4