/** convert a Error.stack string to an array*/
export function stackStringToArray(stack: string, keepHeader: boolean= false, keepWhitespace= false): string[] {
	var stackArray = stack.toString().split("\n");
	if (keepWhitespace !== true) {
		stackArray = stackArray.map((value) => value.trim());
	}
	if (keepHeader !== true) {
		stackArray.shift();
	}
	return stackArray;

}


/** obtain a stacktrace.  TODO:  replace with https://github.com/eriwen/javascript-stacktrace  ???  maybe, try at least */
export function getStackTrace(maxStackSize= 50): string[] {

	var callstack = new Array<string>(0);
	var isCallstackPopulated = false;

	//if(__.jsHelper.platformType===PlatformType.PhantomJs){

	//}
	if (typeof (<any>Error) !== "undefined") {
		//console.log("getting error object"); /////////////////////////////////////////////////////////////////////////////
		var errorObj = new (<any>Error)();

		if (errorObj.stack == null) {
			try {
				throw new Error("throwing an error to obtain a .stack variable");
			} catch (ex) {
				errorObj = ex;
			}
		}

		if (errorObj.stack != null) {
			//console.log("getting error object stack"); /////////////////////////////////////////////////////////////////////////////
			var stack = stackStringToArray(errorObj.stack);
			//remove call to this function:
			stack.shift();
			if (stack.length > 0) {

				callstack = stack;
				isCallstackPopulated = true;
			}
		}

	}
	if (!isCallstackPopulated) {
		try {
			var _ii: any;
			_ii.dont.exist += 0; //doesn"t exist- that"s the point
		} catch (e) {
			var lines: string;
			var len: number;

			if (e.stack) { //Firefox
				//console.log("//Firefox"); /////////////////////////////////////////////////////////////////////////////
				lines = e.stack.split("\n");
				//console.log("LINES == " +lines.join("\n"));
				len = lines.length;
				for (var i1 = 0; i1 < len; i1++) {
					if (lines[i1].match(/^\s*[A-Za-z0-9\-_\$]+\(/)) {
						callstack.push(lines[i1]);
					}
				}
				//Remove call to printStackTrace()
				callstack.shift();
				isCallstackPopulated = true;
			} else if (window && (<any>window).opera && e.message) { //Opera
				//console.log("//Opera"); /////////////////////////////////////////////////////////////////////////////
				lines = e.message.split("\n");
				len = lines.length;
				for (var i2 = 0; i2 < len; i2++) {
					if (lines[i2].match(/^\s*[A-Za-z0-9\-_\$]+\(/)) {
						var entry = lines[i2];
						//Append next line also since it has the file info
						if (lines[i2 + 1]) {
							entry += " at " + lines[i2 + 1];
							i2++;
						}
						callstack.push(entry);
					}
				}
				//Remove call to printStackTrace()
				callstack.shift();
				isCallstackPopulated = true;
			}
		}
	}
	if (!isCallstackPopulated) { //IE and Safari
		//console.log("//IE and Safari"); /////////////////////////////////////////////////////////////////////////////
		/* tslint:disable */
		var currentFunction = arguments.callee.caller;
		/* tslint:enable */
		var loopCount = 0;
		while (currentFunction && loopCount <= maxStackSize) {
			loopCount++;
			var fn = currentFunction.toString();

			var fname = fn.substring(0, fn.indexOf("{")) || "unknown";
			callstack.push(fname);
			//callstack.push(fn);
			currentFunction = currentFunction.caller;
		}
	}
	//console.log("//returning callstack"); /////////////////////////////////////////////////////////////////////////////

	//truncate stack if needed
	if (callstack.length > maxStackSize) {
		callstack.length = maxStackSize;
		callstack.push(" STACK TRUNCATED: exceeded frames.  Max= " + maxStackSize);
	}
	return callstack;
	//output(callstack);
}