using UnityEngine;
using System.Collections;
using System;

namespace MoreMountains.Tools
{	
	/// <summary>
	/// Time helpers
	/// </summary>

	public class MMTime : MonoBehaviour 
	{
		/// <summary>
		/// Turns a float (expressed in seconds) into a string displaying hours, minutes, seconds and hundredths optionnally
		/// </summary>
		/// <param name="t"></param>
		/// <param name="displayHours"></param>
		/// <param name="displayMinutes"></param>
		/// <param name="displaySeconds"></param>
		/// <param name="displayHundredths"></param>
		/// <returns></returns>
		public static string FloatToTimeString(float t, bool displayHours = false, bool displayMinutes = true, bool displaySeconds = true, bool displayMilliseconds = false)
		{
			int intTime = (int)t;
			int hours = intTime / 3600;
			int minutes = intTime / 60;
			int seconds = intTime % 60;
			int milliseconds = Mathf.FloorToInt((t * 1000)%1000);
            
			if (displayHours && displayMinutes && displaySeconds && displayMilliseconds)
			{
				return string.Format("{0:00}:{1:00}:{2:00}.{3:D3}", hours, minutes, seconds, milliseconds);
			}
			if (!displayHours && displayMinutes && displaySeconds && displayMilliseconds)
			{
				return string.Format("{0:00}:{1:00}.{2:D3}", minutes, seconds, milliseconds);
			}
			if (!displayHours && !displayMinutes && displaySeconds && displayMilliseconds)
			{
				return string.Format("{0:D2}.{1:D3}", seconds, milliseconds);
			}
			if (!displayHours && !displayMinutes && displaySeconds && !displayMilliseconds)
			{
				return string.Format("{0:00}", seconds);
			}
			if (displayHours && displayMinutes && displaySeconds && !displayMilliseconds)
			{
				return string.Format("{0:00}:{1:00}:{2:00}", hours, minutes, seconds);
			}
			if (!displayHours && displayMinutes && displaySeconds && !displayMilliseconds)
			{
				return string.Format("{0:00}:{1:00}", minutes, seconds);
			}
			return null;

		}

		/// <summary>
		/// Takes a hh:mm:ss:SSS string and turns it into a float value expressed in seconds
		/// </summary>
		/// <returns>a number of seconds.</returns>
		/// <param name="timeInStringNotation">Time in string notation to decode.</param>
		public static float TimeStringToFloat(string timeInStringNotation)
		{
			if (timeInStringNotation.Length!=12)
			{
				throw new Exception("The time in the TimeStringToFloat method must be specified using a hh:mm:ss:SSS syntax");
			}

			string[] timeStringArray = timeInStringNotation.Split(new string[] {":","."},StringSplitOptions.None);

			float startTime=0f;
			float result;
			if (float.TryParse(timeStringArray[0], out result))
			{
				startTime += result*3600f;
			}
			if (float.TryParse(timeStringArray[1], out result))
			{
				startTime += result*60f;
			}
			if (float.TryParse(timeStringArray[2], out result))
			{
				startTime += result;
			}
			if (float.TryParse(timeStringArray[3], out result))
			{
				startTime += result/1000f;
			}

			return startTime;
		}
	}
}