using System;
using System.Collections.Generic;

namespace UnityEngine.SocialPlatforms.Impl
{
	public class LocalUser : UserProfile, ILocalUser
	{
		private IUserProfile[] m_Friends;
		private bool m_Authenticated;
		private bool m_Underage;
		
		public LocalUser()
		{
			m_Friends = new UserProfile[0];
			m_Authenticated = false;
			m_Underage = false;
		}
		
		public void Authenticate (Action<bool> callback)
		{
			ActivePlatform.Instance.Authenticate((ILocalUser)this, callback);
		}
		
		public void LoadFriends (Action<bool> callback)
		{
			ActivePlatform.Instance.LoadFriends((ILocalUser)this, callback);
		}
		
		// Setters for implementors
		public void SetFriends(IUserProfile[] friends)
		{
			m_Friends = friends;
		}
		public void SetAuthenticated(bool value)
		{
			m_Authenticated = value;
		}
		public void SetUnderage(bool value)
		{
			m_Underage = value;
		}

		public IUserProfile[] friends { get { return m_Friends; } }
		public bool authenticated { get { return m_Authenticated; } }
		public bool underage { get { return m_Underage; } }
	}
		
	public class UserProfile : IUserProfile
	{
		protected string m_UserName;
		protected string m_ID;
		protected bool m_IsFriend;
		protected UserState m_State;
		protected Texture2D m_Image;

		public UserProfile()
		{
			m_UserName = "Uninitialized";
			m_ID = "0";
			m_IsFriend = false;
			m_State = UserState.Offline;
			m_Image = new Texture2D(32, 32);
		}
		
		public UserProfile(string name, string id, bool friend) : this (name, id, friend, UserState.Offline, new Texture2D(0, 0)) { }

		public UserProfile(string name, string id, bool friend, UserState state, Texture2D image)
		{
			m_UserName = name;
			m_ID = id;
			m_IsFriend = friend;
			m_State = state;
			m_Image = image;
		}
		
		public override string ToString()
		{
			return id + " - " +
				userName + " - " +
				isFriend + " - " +
				state;
		}
		
		public void SetUserName(string name)
		{
			m_UserName = name;
		}
		public void SetUserID(string id)
		{
			m_ID = id;
		}
		public void SetImage(Texture2D image)
		{
			m_Image = image;
		}
		public void SetIsFriend(bool value)
		{
			m_IsFriend = value;
		}
		public void SetState(UserState state)
		{
			m_State = state;
		}
			
		public string userName { get { return m_UserName; } }
		public string id { get { return m_ID; } }
		public bool isFriend { get { return m_IsFriend; } }
		public UserState state { get { return m_State; } }
		public Texture2D image { get { return m_Image; } }
	}
	
	public class Achievement : IAchievement
	{
		private bool m_Completed;
		private bool m_Hidden;
		private DateTime m_LastReportedDate;
		
		public Achievement(string id,
		                   double percentCompleted,
		                   bool completed,
		                   bool hidden,
		                   DateTime lastReportedDate)
		{
			this.id = id;
			this.percentCompleted = percentCompleted;
			m_Completed = completed;
			m_Hidden = hidden;
			m_LastReportedDate = lastReportedDate;
		}
		
		public Achievement(string id, double percent)
		{
			this.id = id;
			percentCompleted = percent;
			m_Hidden = false;
			m_Completed = false;
			m_LastReportedDate = DateTime.MinValue;
		}
		
		public Achievement() : this("unknown", 0.0) { }
		
		public override string ToString()
		{
			return id + " - " +
				percentCompleted + " - " +
				completed + " - " +
				hidden + " - " +
				lastReportedDate;
		}
		
		public void ReportProgress(Action<bool> callback)
		{
			ActivePlatform.Instance.ReportProgress(id, percentCompleted, callback);
		}
		
		// Setters for implementors
		public void SetCompleted(bool value)
		{
			m_Completed = value;
		}
		public void SetHidden(bool value)
		{
			m_Hidden = value;
		}
		public void SetLastReportedDate(DateTime date)
		{
			m_LastReportedDate = date;
		}
				
		public string id { get; set; }		
		public double percentCompleted { get; set; }
		public bool completed { get { return m_Completed; } }
		public bool hidden { get { return m_Hidden; } }
		public DateTime lastReportedDate { get { return m_LastReportedDate; } }
		
		// TODO: How to have a static method for resetting all achivements?
		//public abstract void ResetAllAchievements();
	}
	
	public class AchievementDescription : IAchievementDescription
	{
		private string m_Title;
		private Texture2D m_Image;
		private string m_AchievedDescription;
		private string m_UnachievedDescription;
		private bool m_Hidden;
		private int m_Points;
		
		public AchievementDescription(string id,
										string title,
										Texture2D image,
										string achievedDescription,
										string unachievedDescription,
										bool hidden,
										int points)
		{
			this.id = id;
			m_Title = title;
			m_Image = image;
			m_AchievedDescription = achievedDescription;
			m_UnachievedDescription = unachievedDescription;
			m_Hidden = hidden;
			m_Points = points;
		}
		
		public override string ToString()
		{
			return id + " - " +
				title + " - " +
				achievedDescription + " - " +
				unachievedDescription + " - " +
				points + " - " +
				hidden;
		}
		
		public void SetImage(Texture2D image)
		{
			m_Image = image;
		}
		
		public string id { get; set; }
		public string title { get { return m_Title; } }
		public Texture2D image { get { return m_Image; } }
		public string achievedDescription { get { return m_AchievedDescription; } }
		public string unachievedDescription { get { return m_UnachievedDescription; } }
		public bool hidden { get { return m_Hidden; } }
		public int points { get { return m_Points; } }		
	}
	
	public class Score : IScore
	{
		private DateTime m_Date;
		private string m_FormattedValue;
		private string m_UserID;
		private int m_Rank;

		public Score() : this("unkown", -1) { }

		public Score(string leaderboardID, Int64 value)
			: this(leaderboardID, value, "0", DateTime.Now, "", -1)
		{ }
		
		public Score(string leaderboardID, Int64 value, string userID, DateTime date, string formattedValue, int rank)
		{
			this.leaderboardID = leaderboardID;
			this.value = value;
			m_UserID = userID;
			m_Date = date;
			m_FormattedValue = formattedValue;
			m_Rank = rank;
		}
		
		public override string ToString()
		{
			return "Rank: '" + m_Rank + "' Value: '" + value + "' Category: '" + leaderboardID + "' PlayerID: '" +
				m_UserID + "' Date: '" + m_Date;
		}
		
		public void ReportScore(Action<bool> callback)
		{
			ActivePlatform.Instance.ReportScore(value, leaderboardID, callback);
		}
		
		public void SetDate(DateTime date)
		{
			m_Date = date;
		}
		public void SetFormattedValue(string value)
		{
			m_FormattedValue = value;
		}
		public void SetUserID(string userID)
		{
			m_UserID = userID;
		}
		public void SetRank(int rank)
		{
			m_Rank = rank;
		}
		
		public string leaderboardID { get; set; }
		// TODO: This is just an int64 here, but should be able to represent all supported formats, except for float type scores ...
		public Int64 value { get; set; }
		public DateTime date { get { return m_Date; } }
		public string formattedValue { get { return m_FormattedValue; } }
		public string userID { get { return m_UserID; } }		
		public int rank { get { return m_Rank; } }
	}
	
	public class Leaderboard : ILeaderboard
	{
		private bool m_Loading;
		private IScore m_LocalUserScore;
		private uint m_MaxRange;
		private IScore[] m_Scores;
		private string m_Title;
		private string[] m_UserIDs;

		public Leaderboard()
		{
			id = "Invalid";
			range = new Range(1, 10);
			userScope = UserScope.Global;
			timeScope = TimeScope.AllTime;
			m_Loading = false;
			m_LocalUserScore = new Score("Invalid", 0);
			m_MaxRange = 0;
			m_Scores = new Score[0];
			m_Title = "Invalid";
			m_UserIDs = new string[0];
		}
		
		// TODO: Implement different behaviour when this is populated
		/*public Leaderboard(string[] userIDs): this()
		{
			m_UserIDs = userIDs;
		}*/
		
		public void SetUserFilter(string[] userIDs)
		{
			m_UserIDs = userIDs;
		}
		
		public override string ToString()
		{
			return "ID: '" + id + "' Title: '" + m_Title + "' Loading: '" + m_Loading + "' Range: [" +
			       range.from + "," + range.count + "] MaxRange: '" + m_MaxRange + "' Scores: '" +
			       m_Scores.Length + "' UserScope: '" + userScope + "' TimeScope: '" + timeScope + "' UserFilter: '"
			       + m_UserIDs.Length;
		}
		
		public void LoadScores(Action<bool> callback)
		{
			ActivePlatform.Instance.LoadScores(this, callback);
		}
		
		public bool loading
		{
			get { return ActivePlatform.Instance.GetLoading(this); } 
		}
		
		// Setters for implementors
		public void SetLocalUserScore(IScore score)
		{
			m_LocalUserScore = score;
		}
		public void SetMaxRange(uint maxRange)
		{
			m_MaxRange = maxRange;
		}
		public void SetScores(IScore[] scores)
		{
			m_Scores = scores;
		}
		public void SetTitle(string title)
		{
			m_Title = title;
		}
		public string[] GetUserFilter()
		{
			return m_UserIDs;
		}
		
		public string id { get; set; }
		public UserScope userScope { get; set; }
		public Range range { get; set; }
		public TimeScope timeScope { get; set; }
		public IScore localUserScore { get { return m_LocalUserScore; } }
		public uint maxRange { get { return m_MaxRange; } }
		public IScore[] scores { get { return m_Scores; } }
		public string title { get { return m_Title; } }
	}
}

namespace UnityEngine.SocialPlatforms
{
	using UnityEngine.SocialPlatforms.Impl;
	
	public class Local : ISocialPlatform
	{
		static LocalUser m_LocalUser = null;
		List<UserProfile> m_Friends = new List<UserProfile>();
		List<UserProfile> m_Users = new List<UserProfile>();
		List<AchievementDescription> m_AchievementDescriptions = new List<AchievementDescription>();
		List<Achievement> m_Achievements = new List<Achievement>();
		List<Leaderboard> m_Leaderboards = new List<Leaderboard>();
		Texture2D m_DefaultTexture;
		
		public ILocalUser localUser
		{
			get
			{
				if (m_LocalUser == null)
					m_LocalUser = new LocalUser();
				return m_LocalUser;
			}
		}
		
		void ISocialPlatform.Authenticate(ILocalUser user, System.Action<bool> callback)
		{
			LocalUser thisUser = (LocalUser)user;
			m_DefaultTexture = CreateDummyTexture(32, 32);
			PopulateStaticData();
			thisUser.SetAuthenticated(true);
			thisUser.SetUnderage(false);
			thisUser.SetUserID("1000");
			thisUser.SetUserName("Lerpz");
			thisUser.SetImage(m_DefaultTexture);
			if (callback != null)
				callback(true);
		}
		
		void ISocialPlatform.LoadFriends(ILocalUser user, System.Action<bool> callback)
		{
			if (!VerifyUser()) return;
			((LocalUser)user).SetFriends(m_Friends.ToArray());
			if (callback != null)
				callback(true);
		}
		
		public void LoadUsers(string[] userIDs, Action<IUserProfile[]> callback)
		{
			List<UserProfile> matches = new List<UserProfile>();
			if (!VerifyUser()) return;
			foreach (string userId in userIDs)
			{
				foreach(UserProfile user in m_Users)
					if (user.id == userId)
						matches.Add(user);
				foreach(UserProfile user in m_Friends)
					if (user.id == userId)
						matches.Add(user);
			}
			callback(matches.ToArray());
		}
		
		public void ReportProgress(string id, double progress, System.Action<bool> callback)
		{
			if (!VerifyUser()) return;
			// Update achievement if it's already been reported
			foreach (Achievement achoo in m_Achievements)
			{
				// TODO: Only allow increase in progress, figure out if xbox/gc report errors when lower progress is reported
				if (achoo.id == id && achoo.percentCompleted <= progress)
				{
					if (progress >= 100.0)
						achoo.SetCompleted(true);
					achoo.SetHidden(false);
					achoo.SetLastReportedDate(DateTime.Now);
					achoo.percentCompleted = progress;
					if (callback != null)
						callback(true);
					// No need to process this report any more
					return;
				}
			}
			
			// If it's not been reported already check if it's a valid achievement description ID and add it, else it's an error
			foreach (AchievementDescription achoo in m_AchievementDescriptions)
			{
				// TODO: Only allow increase in progress, figure out if xbox/gc report errors when lower progress is reported
				if (achoo.id == id)
				{
					bool completed = (progress >= 100.0 ? true : false);
					Achievement newAchievement = new Achievement(id, progress, completed, false, DateTime.Now);
					m_Achievements.Add(newAchievement);
					if (callback != null)
						callback(true);
					return;
				}
			}
			
			Debug.LogError("Achievement ID not found");
			if (callback != null)
				callback(false);
		}
		
		public void LoadAchievementDescriptions(System.Action<IAchievementDescription[]> callback)
		{
			if (!VerifyUser()) return;
			if (callback != null)
				callback(m_AchievementDescriptions.ToArray());
		}
				
		public void LoadAchievements(System.Action<IAchievement[]> callback)
		{
			if (!VerifyUser()) return;
			if (callback != null)
				callback(m_Achievements.ToArray());
		}
		
		public void ReportScore(Int64 score, string board, System.Action<bool> callback)
		{
			if (!VerifyUser()) return;
			foreach (Leaderboard current in m_Leaderboards)
			{
				if (current.id == board)
				{
					// TODO: IIRC GameCenter only adds scores if they are higher than the users previous score, maybe mirror this here.
					List<Score> scores = new List<Score>((Score[])current.scores);
					scores.Add(new Score(board, score, localUser.id, DateTime.Now, score + " points", 0));
					current.SetScores(scores.ToArray());
					if (callback != null)
						callback(true);
					return;
				}
			}
			Debug.LogError("Leaderboard not found");
			if (callback != null)
				callback(false);
		}
		
		public void LoadScores(string leaderboardID, Action<IScore[]> callback)
		{
			if (!VerifyUser()) return;
			foreach (Leaderboard current in m_Leaderboards)
			{
				if (current.id == leaderboardID)
				{
					SortScores(current);
					if (callback != null)
						callback(current.scores);
					return;
				}
			}
			Debug.LogError("Leaderboard not found");
			if (callback != null)
				callback(new Score[0]);
		}
		
		void ISocialPlatform.LoadScores(ILeaderboard board, System.Action<bool> callback)
		{
			if (!VerifyUser()) return;
			// Fill in fake server side data on leaderboard
			Leaderboard thisBoard = (Leaderboard)board;
			foreach (Leaderboard lb in m_Leaderboards)
			{
				// TODO: In the real world the board might have thousands of scores but only 100 
				// are returned, for now we can assume they are less than 100 here
				// TODO: Apply the filters which the leaderboard has, right now it always returns everything found
				if (lb.id == thisBoard.id)
				{
					thisBoard.SetTitle(lb.title);
					thisBoard.SetScores(lb.scores);
					thisBoard.SetMaxRange((uint)lb.scores.Length);
				}
			}
			SortScores(thisBoard);
			SetLocalPlayerScore(thisBoard);
			if (callback != null)
				callback(true);
		}
		
		bool ISocialPlatform.GetLoading(ILeaderboard board)
		{
			if (!VerifyUser()) return false;
			return ((Leaderboard)board).loading;
		}
		
		// TODO: Sorting seems to be broken...
		private void SortScores(Leaderboard board)
		{
			List<Score> scores = new List<Score>((Score[])board.scores);
			scores.Sort(delegate(Score s1, Score s2)
            {
            	return s2.value.CompareTo(s1.value);
			});
			for (int i = 0; i < scores.Count; i++)
				scores[i].SetRank(i+1);
		}
		
		private void SetLocalPlayerScore(Leaderboard board)
		{
			foreach (Score score in board.scores)
			{
				if (score.userID == localUser.id)
				{
					board.SetLocalUserScore(score);
					break;
				}
			}
		}

		
		public void ShowAchievementsUI()
		{
			Debug.Log("ShowAchievementsUI not implemented");
		}
		
		public void ShowLeaderboardUI()
		{
			Debug.Log("ShowLeaderboardUI not implemented");
		}
		
		public ILeaderboard CreateLeaderboard()
		{
			Leaderboard lb = new Leaderboard();
			return (ILeaderboard)lb;
		}
		
		public IAchievement CreateAchievement()
		{
			Achievement achoo = new Achievement();
			return (IAchievement)achoo;
		}
		
		private bool VerifyUser()
		{
			if (!localUser.authenticated)
			{
				Debug.LogError("Must authenticate first");
				return false;
			}
			return true;
		}
		
		private void PopulateStaticData()
		{
			m_Friends.Add(new UserProfile("Fred", "1001", true, UserState.Online, m_DefaultTexture));
			m_Friends.Add(new UserProfile("Julia", "1002", true, UserState.Online, m_DefaultTexture));
			m_Friends.Add(new UserProfile("Jeff", "1003", true, UserState.Online, m_DefaultTexture));
			m_Users.Add(new UserProfile("Sam", "1004", false, UserState.Offline, m_DefaultTexture));
			m_Users.Add(new UserProfile("Max", "1005", false, UserState.Offline, m_DefaultTexture));
			m_AchievementDescriptions.Add (new AchievementDescription("Achievement01", "First achievement", m_DefaultTexture, "Get first achievement", "Received first achievement", false, 10));
			m_AchievementDescriptions.Add (new AchievementDescription("Achievement02", "Second achievement", m_DefaultTexture, "Get second achievement", "Received second achievement", false, 20));
			m_AchievementDescriptions.Add (new AchievementDescription("Achievement03", "Third achievement", m_DefaultTexture, "Get third achievement", "Received third achievement", false, 15));
			Leaderboard board = new Leaderboard();
			board.SetTitle("High Scores");
			board.id = "Leaderboard01";
			List<Score> scores = new List<Score>();
			scores.Add(new Score("Leaderboard01", 300, "1001", DateTime.Now.AddDays(-1), "300 points", 1));
			scores.Add(new Score("Leaderboard01", 255, "1002", DateTime.Now.AddDays(-1), "255 points", 2));
			scores.Add(new Score("Leaderboard01", 55, "1003", DateTime.Now.AddDays(-1), "55 points", 3));
			scores.Add(new Score("Leaderboard01", 10, "1004", DateTime.Now.AddDays(-1), "10 points", 4));
			board.SetScores(scores.ToArray());
			m_Leaderboards.Add(board);
		}
		
		private Texture2D CreateDummyTexture(int width, int height)
		{
			Texture2D texture = new Texture2D(width, height);
			for (int y = 0; y < height; ++y)
			{
		        for (int x = 0; x < width; ++x)
				{
					Color color = (x&y) > 0 ? Color.white : Color.gray;
					texture.SetPixel (x, y, color);
				}
			}
			texture.Apply();
			return texture;
		}
	}
}