module classes {

	export class Ranger {

		public getRange(start: number, end: number): Array<number> {

			/*
			There are 6 parameters combination:

			1. (5, 7)
			2. (7, 5)
			3. (7, 7)
			4. (-5, -7)
			5. (-7, -5)
			6. (-7, -7)
			7. (5, -7)
			8. (-7, 5)

			This function will return an ordered range for the parameters, for example:

			(5, 7) or (7, 5) => [5,6,7]
			(-7, 5) or (5, -7) => [-7,-6,-5,-4,-3,-2,-1,0,1,2,4,5]
			(-7, -7) => [-7]
			(5, 5) => [5]
			*/

			var notBothNegativeTmp = null,
					bothNegativeTmp = null,
					bothNegativeFlag: boolean = false,
					retArray: Array<number> = [];

			if(start < 0 && end < 0) {

					start = Math.abs(start);

					end = Math.abs(end);

					bothNegativeFlag = true;

					// For cases like: (-7, -5)
					if(start > end) {

							bothNegativeTmp = end;

							end = start;

							start = bothNegativeTmp;

					} // Else, for cases like: (-5, -7), (-7, -7)

			} else {

				// For cases like: (7, 5), (5, -7)
				if(start > end) {

					notBothNegativeTmp = end;

					end = start;

					start = notBothNegativeTmp;

				} // Else, for cases like: (5, 7), (7, 7), (7, 7), (-7, 5)

			}

			for(let i = start; i <= end; i++) {

				if(bothNegativeFlag) {

					 retArray.push(-i);

				} else {

					 retArray.push(i);

				}

			}

			return retArray;

		}

	}

}

export = classes;