using System;
using System.Collections.Generic;

namespace Collections_Homework
{
	class Program
	{
		static void Main(string[] args)
		{

		  Dictionary<string, Dictionary<string,List<int>>> students = new Dictionary<string,Dictionary<string,List<int>>>();
			string[] input;
			Console.WriteLine("		Menu	");
			Console.WriteLine("add -- Add score to a student's diary");
			Console.WriteLine("print [name] -- Print scores for all students or for a specific student");
			Console.WriteLine("exit -- exits the program");
			do
			{

				input = Console.ReadLine().Split(" ");

				switch (input[0])
				{
					case "add":
						Add(students,input);
						break;
					case "print":
						Print(students,input[1]);
						break;


				}
			} while (!input.Equals("exit"));



		}

		private static void Print(Dictionary<string, Dictionary<string, List<int>>> students, string studentName="somebody")
		{
			if (studentName == null)
			{
				//Print all scores of all students
				foreach (KeyValuePair<string, Dictionary<string, List<int>>> currentStudent in students)
				{
					Console.WriteLine($"Student name: {currentStudent.Key}");

					foreach (KeyValuePair<string, List<int>> subject in currentStudent.Value)
					{
						Console.WriteLine($"Subject: {subject.Key}");
						foreach (var score in subject.Value)
						{
							Console.WriteLine(score + " ");
						}
					}
				}
			}
			else
			{
				//print scores just for the mentioned student
				Console.WriteLine($"Student name: {studentName}");
				foreach(KeyValuePair<string,List<int>> subject in students[studentName]){
					Console.WriteLine($"Subject: {subject.Key}");

					foreach(var score in subject.Value)
					{
						Console.WriteLine(score+" ");
					}
				}
			}
		}

		public static void Add(Dictionary<string, Dictionary<string, List<int>>> students,string[] input)
		{

			string studentName = input[1];
			string subject = input[2];
			int subjectScore = int.Parse(input[3]);

			if (students.ContainsKey(studentName))
			{
				if (students[studentName].ContainsKey(subject))
				{
					students[studentName][subject].Add(subjectScore);
				}
				else
				{
					students[studentName].Add(subject, new List<int> { subjectScore });
				}
			}
			else
			{
				students[studentName] = new Dictionary<string, List<int>>();
				students[studentName].Add(subject, new List<int> { subjectScore });
			}

		}
	}
}