#region Using Statements
using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Storage;
using System.Xml;
using System.Diagnostics;
#endregion

namespace ElementalGame
{
    public class GameRules
    {
        public Stopwatch survivalRespawnTimer = null;
        private const int SURVIVAL_RESPAWN_TIME = 5000;
        private int currentLevelIndex = 0;
        public static int cutSceneIndex = 0;

        public enum StoryElement { CUTSCENE, LIVEACTION };
        public static StoryElement storyElement = StoryElement.LIVEACTION;

        // CLEAN -- MOVE TO A SEPERATE CLASS
        public void CheckForGameOver(GameFlow gameFlow, ObjectLibrary objectLibrary, MenuSystem menuSystem, GameFlow.GameType gameType)
        {
            int playersAlive = objectLibrary.humans.Count;
            int winningPlayer = -1;
            int winningBot = -1;
            int mostKills = 0;

            if (ElementalGame.gameState == ElementalGame.GameState.GAME_MODE)
            {
                // Story Mode
                if (GameFlow.gameType == GameFlow.GameType.STORY_MODE)
                {                    
                   // int numKeysToAdvance = 10;
                    if (storyElement == StoryElement.CUTSCENE)
                    {
                        // Cutscene finished, Load Next Level
                        if (menuSystem.scene5.IsDone() && currentLevelIndex == 4)
                        {
                            // Scene is over..  reset and go to start screen
                            currentLevelIndex = 0; 
                            ElementalGame.gameState = ElementalGame.GameState.TITLE_SCREEN;
                            ElementalGame.jiggler.Reset();
                            ElementalGame.jiggler.Start();
                            Audio.PlayTitleSong();
                        }
                        else if (menuSystem.scene4.IsDone() && currentLevelIndex == 3) 
                        {
                            // Start New Level
                            objectLibrary.LoadLevel_Stage1(XML.levelInfo[currentLevelIndex].filepath);
                            // Load Level Data
                            XML.LoadPlayerIndex(menuSystem);
                            menuSystem.LevelSetupCommit(gameFlow.objectLibrary);

                            gameFlow.Load();
                            gameFlow.objectLibrary.humans[0].LoadPlayer(XML.playerInfo[0]);
                            currentLevelIndex++;
                            storyElement = StoryElement.LIVEACTION;
                            ElementalGame.CheckForControllers(1, gameFlow);
                        } 
                        else if (menuSystem.scene3.IsDone() && currentLevelIndex == 2)
                        {
                            // Start New Level
                            objectLibrary.LoadLevel_Stage1(XML.levelInfo[currentLevelIndex].filepath);
                            // Load Level Data
                            XML.LoadPlayerIndex(menuSystem);
                            menuSystem.LevelSetupCommit(gameFlow.objectLibrary);

                            gameFlow.Load();
                            gameFlow.objectLibrary.humans[0].LoadPlayer(XML.playerInfo[0]);
                            currentLevelIndex++;
                            storyElement = StoryElement.LIVEACTION;
                            ElementalGame.CheckForControllers(1, gameFlow);
                        } 
                        else if (menuSystem.scene2.IsDone() && currentLevelIndex == 1) 
                        {
                            // Start New Level
                            objectLibrary.LoadLevel_Stage1(XML.levelInfo[currentLevelIndex].filepath);
                            // Load Level Data
                            XML.LoadPlayerIndex(menuSystem);
                            menuSystem.LevelSetupCommit(gameFlow.objectLibrary);

                            gameFlow.Load();
                            gameFlow.objectLibrary.humans[0].LoadPlayer(XML.playerInfo[0]);
                            currentLevelIndex++;
                            storyElement = StoryElement.LIVEACTION;
                            ElementalGame.CheckForControllers(1, gameFlow);
                        }
                        else if (menuSystem.scene1.IsDone() && currentLevelIndex == 0)  
                        {
                            // Start New Level
                            objectLibrary.LoadLevel_Stage1(XML.levelInfo[currentLevelIndex].filepath);
                            // Load Level Data
                            XML.LoadPlayerIndex(menuSystem);
                            menuSystem.LevelSetupCommit(gameFlow.objectLibrary);

                            gameFlow.Load();
                            gameFlow.objectLibrary.humans[0].LoadPlayer(XML.playerInfo[0]);
                            currentLevelIndex++;
                            storyElement = StoryElement.LIVEACTION;
                            ElementalGame.CheckForControllers(1, gameFlow);
                        }
                    }

                    if (storyElement == StoryElement.LIVEACTION)
                    {
                        // Level Complete, run next cutscene
                        //temporary.. needs to be number of keys collected
                        if (objectLibrary.humans[0].numberOfKeysFound >= XML.GameSettings.STORYMODE_NUM_KEYS_TO_COLLECT)
                        {
                            // Load next CutScene
                            storyElement = StoryElement.CUTSCENE;

                            // Clear keys
                            objectLibrary.humans[0].numberOfKeysFound = 0;
                            cutSceneIndex++;

                            // Play appropriate cutscene
                            if (cutSceneIndex == 0)
                            {
                                Audio.PlayLevelSong("Scene1");
                                menuSystem.scene1.StartCutScene();
                            }
                            else if (cutSceneIndex == 1)
                            {
                                Audio.PlayLevelSong("Scene2");
                                menuSystem.scene2.StartCutScene();
                            }
                            else if (cutSceneIndex == 2)
                            {
                                Audio.PlayLevelSong("Scene3");
                                menuSystem.scene3.StartCutScene();
                            }
                            else if (cutSceneIndex == 3)
                            {
                                Audio.PlayLevelSong("Scene4");
                                menuSystem.scene4.StartCutScene();
                            }
                            else if (cutSceneIndex == 4)
                            {
                                Audio.PlayLevelSong("Scene4");
                                menuSystem.scene5.StartCutScene();
                            }

                        }
                    }
                }

                // Last Man Standing
                else if (GameFlow.gameType == GameFlow.GameType.LAST_MAN_STANDING)
                {
                    for (int i = 0; i < objectLibrary.humans.Count; i++)
                    {
                        if (objectLibrary.humans[i].IsAlive() == false)
                        {
                            playersAlive--;
                        }
                        else
                        {
                            winningPlayer = i + 1;
                        }
                    }

                    if (playersAlive < 2)
                    {
                        int botsAlive = GameFlow.numberOfBots;
                        for (int i = 0; i < GameFlow.numberOfBots; i++)
                        {
                            if (objectLibrary.bots[i].IsAlive() == false)
                            {
                                botsAlive--;
                            }
                            else
                            {
                                winningBot = i + 1;
                            }
                        }

                        if (playersAlive == 1)
                        {
                            if (XML.SystemSettings.TOTAL_PLAYERS == 1 && GameFlow.numberOfBots == 0)
                            {
                                return;
                            }
                            else if (botsAlive == 0)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Player " + winningPlayer + " Wins!");
                                for (int i = 0; i < XML.SystemSettings.TOTAL_PLAYERS; i++)
                                {
                                    ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).SetTitle(
                                        "Player " + (i + 1) + " Kills = " + objectLibrary.humans[i].kills
                                        );
                                }
                            }
                            else
                            {
                                return;
                            }
                        }
                        else if (playersAlive == 0)
                        {
                            if (botsAlive == 1)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Bot#" + winningBot + " Wins!");
                            }
                            else if (botsAlive == 0 && objectLibrary.bots.Count > 0)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Everybody dies!");
                            }
                            else if (XML.SystemSettings.TOTAL_PLAYERS == 1)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Congratulations! You Killed Yourself!");
                            }

                            for (int i = 0; i < 4; i++)
                            {
                                if (i < XML.SystemSettings.TOTAL_PLAYERS)
                                {
                                    ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).SetTitle(
                                        "Player " + (i + 1) + " Kills = " + objectLibrary.humans[i].kills
                                        );
                                    ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Show();
                                }
                                else
                                {
                                    ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Hide();
                                }
                            }

                        }

                        ElementalGame.gameState = ElementalGame.GameState.GAME_OVER;
                    }
                }

                // DeathMatch
                else if (GameFlow.gameType == GameFlow.GameType.POINT_DEATHMATCH)
                {

                    for (int i = 0; i < objectLibrary.humans.Count; i++)
                    {
                        if (objectLibrary.humans[i].kills >= GameFlow.maxNumberOfKills)
                        {
                            winningPlayer = i + 1;
                        }
                    }

                    for (int i = 0; i < objectLibrary.bots.Count; i++)
                    {
                        if (objectLibrary.bots[i].kills >= GameFlow.maxNumberOfKills)
                        {
                            winningBot = i + 1;
                        }
                    }

                    if (winningPlayer > 0)
                    {
                        ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Player " + winningPlayer + " Wins!");
                        for (int i = 0; i < 4; i++)
                        {
                            if (i < XML.SystemSettings.TOTAL_PLAYERS)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).SetTitle(
                                    "Player " + (i + 1) + " Kills = " + objectLibrary.humans[i].kills);
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Show();
                            }
                            else
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Hide();
                            }
                        }

                        ElementalGame.gameState = ElementalGame.GameState.GAME_OVER;
                    }
                    else if (winningBot > 0)
                    {
                        ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Bot " + winningBot + " Wins!");
                        for (int i = 0; i < 4; i++)
                        {
                            if (i < XML.SystemSettings.TOTAL_PLAYERS)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).SetTitle(
                                    "Player " + (i + 1) + " Kills = " + objectLibrary.humans[i].kills);
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Show();
                            }
                            else
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Hide();
                            }
                        }

                        ElementalGame.gameState = ElementalGame.GameState.GAME_OVER;
                    }
                }

                // Survival
                else if (gameType == GameFlow.GameType.SURVIVAL)
                {
                    for (int i = 0; i < objectLibrary.humans.Count; i++)
                    {
                        if (objectLibrary.humans[i].IsAlive() == true)
                        {
                            return;
                        }
                        //max kills?
                        if (objectLibrary.humans[i].kills >= mostKills)
                        {
                            winningPlayer = i + 1;
                            mostKills = objectLibrary.humans[i].kills;
                        }
                    }

                    if (mostKills == 0)
                    {
                        //no one killed anyone
                        ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Zero kills? Are you kidding me?!");
                        for (int i = 0; i < 4; i++)
                        {
                            ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Hide();
                        }
                    }
                    else
                    {
                        ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(0).SetTitle("Player " + winningPlayer + " Wins!");
                        for (int i = 0; i < 4; i++)
                        {
                            if (i < XML.SystemSettings.TOTAL_PLAYERS)
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).SetTitle(
                                    "Player " + (i + 1) + " Kills = " + objectLibrary.humans[i].kills
                                    );
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Show();
                            }
                            else
                            {
                                ElementalGame.menuSystem.gameOverScreen.GetMenu().GetMenuElement(i + 2).Hide();
                            }
                        }
                    }
                    ElementalGame.gameState = ElementalGame.GameState.GAME_OVER;
                }
            }
        }

        public void CheckForRespawn(ObjectLibrary objectLibrary, GameFlow.GameType gameType)
        {
            if (gameType == GameFlow.GameType.SURVIVAL)
            {
                // Only respawn after a certain time limit
                if (survivalRespawnTimer.ElapsedMilliseconds > SURVIVAL_RESPAWN_TIME)
                {
                    for (int i = 0; i < objectLibrary.bots.Count; i++)
                    {
                        if (objectLibrary.bots[i].IsAlive() == false && objectLibrary.bots[i].killedBy != -1)
                        {
                            objectLibrary.bots[i].spawnHeight = objectLibrary.terrain.GetTerrainHeight(objectLibrary.bots[i].spawnPosition.X / Terrain.terrainScaleFactor,
                                                                                                       objectLibrary.bots[i].spawnPosition.Z / Terrain.terrainScaleFactor);
                            objectLibrary.bots[i].SpawnPlayer();
                        }
                    }
                    survivalRespawnTimer.Reset();
                    survivalRespawnTimer.Start();
                }
            }
            else if (gameType == GameFlow.GameType.POINT_DEATHMATCH)
            {
                for (int i = 0; i < objectLibrary.humans.Count; i++)
                {
                    if (objectLibrary.humans[i].IsAlive() == false && objectLibrary.humans[i].killedBy != -1)
                    {
                        if (objectLibrary.humans[i].respawnTimer.ElapsedMilliseconds >= XML.PlayerSettings.RESPAWN_DELAY)
                        {
                            if (gameType == GameFlow.GameType.POINT_DEATHMATCH) // || its last man standing and player has lives left
                            {
                                objectLibrary.humans[i].spawnHeight = objectLibrary.terrain.GetTerrainHeight(objectLibrary.humans[i].spawnPosition.X / Terrain.terrainScaleFactor,
                                                                                                             objectLibrary.humans[i].spawnPosition.Z / Terrain.terrainScaleFactor);
                                objectLibrary.humans[i].SpawnPlayer();
                            }
                        }
                    }
                }

                for (int i = 0; i < objectLibrary.bots.Count; i++)
                {
                    if (objectLibrary.bots[i].IsAlive() == false && objectLibrary.bots[i].killedBy != -1)
                    {
                        if (objectLibrary.bots[i].respawnTimer.ElapsedMilliseconds >= XML.PlayerSettings.RESPAWN_DELAY)
                        {
                            if (gameType == GameFlow.GameType.POINT_DEATHMATCH) // || its last man standing and player has lives left
                            {
                                objectLibrary.bots[i].spawnHeight = objectLibrary.terrain.GetTerrainHeight(objectLibrary.bots[i].spawnPosition.X / Terrain.terrainScaleFactor,
                                                                                                           objectLibrary.bots[i].spawnPosition.Z / Terrain.terrainScaleFactor);
                                objectLibrary.bots[i].SpawnPlayer();
                            }
                        }
                    }
                }
            }
            else if (gameType == GameFlow.GameType.STORY_MODE)
            {
                for (int i = 0; i < objectLibrary.humans.Count; i++)
                {
                    if (objectLibrary.humans[i].IsAlive() == false && objectLibrary.humans[i].killedBy != -1)
                    {
                        if (objectLibrary.humans[i].respawnTimer.ElapsedMilliseconds >= XML.PlayerSettings.RESPAWN_DELAY)
                        {
                            objectLibrary.humans[i].spawnHeight = objectLibrary.terrain.GetTerrainHeight(objectLibrary.humans[i].spawnPosition.X / Terrain.terrainScaleFactor,
                                                                                                         objectLibrary.humans[i].spawnPosition.Z / Terrain.terrainScaleFactor);
                            objectLibrary.humans[i].SpawnPlayer();
                        }
                    }
                }
            }
        }
    }
}