package me.hammerle.supersnuvi.gamelogic;

import java.io.File;
import java.util.LinkedList;
import java.util.TreeSet;
import java.util.function.Consumer;
import me.hammerle.snuviscript.code.Script;
import me.hammerle.supersnuvi.Game;
import me.hammerle.supersnuvi.Keys;
import me.hammerle.supersnuvi.entity.Entity;
import me.hammerle.supersnuvi.entity.EntityBuilder;
import me.hammerle.supersnuvi.tiles.Tile;
import me.hammerle.supersnuvi.util.Utils;

public final class FileLevel extends Level
{
    // level data
    private final LevelData data;
    private final String name;
    private final String fileName;
    // level stats
    private int souls = 0;
    private int maxSouls = 0;
    private float time = 0.0f;
    private final LinkedList<String> messages = new LinkedList<>();
    // controlling
    private TreeSet<Point> spawns = new TreeSet<>();
    // scripting
    private Script levelScript = null;

    public FileLevel(File f)
    {
        this.data = new LevelData(f);
        if(!data.load())
        {
            throw new IllegalArgumentException(f + " is not a valid level.");
        }
        
        this.name = data.getString("name", "error");
        data.forEachInteractTile((x, y, tile) -> 
        {
            Tile t = Game.get().getTile(tile);
            if(t != null)
            {
                maxSouls += t.getBottleScore();
            }

            if(tile == 24) // start tile
            {
                spawns.add(new Point(x, y - 1));
            }
        });
        data.forEachEntity((x, y, tile) -> 
        {            
            if(tile == 1)
            {
                maxSouls++;
            }
        }, 0, data.getWidth(), 0, data.getHeight());
        
        fileName = f.getName();
        
        // there must be at least one spawn
        if(spawns.isEmpty())
        {
            spawns.add(new Point(5, 5));
        }

        // make sure hero is spawned before any script starts
        reset();
        
        String scriptName = f.getPath().replace(".map", "");
        // mark current level as active to make currentLevel calls work
        Level l = Game.get().getCurrentLevel();
        Game.get().setCurrentLevel(this);
        levelScript = Game.get().getParser().startScript(false, ".snuvi", scriptName);
        // call level reset here, because levelScript was null in resetLevel()
        callEvent("level_reset");
        // mark previous level as active
        Game.get().setCurrentLevel(l); 
    }
    
    // -------------------------------------------------------------------------
    // level data
    // -------------------------------------------------------------------------

    @Override
    public LevelData getData()
    {
        return data;
    }
    
    @Override
    public String getName() 
    {
        return name;
    }
    
    @Override
    public String getFileName() 
    {
        return fileName;
    }
    
    @Override
    public void addMessage(String message)
    {
        messages.add(message);
    }
    
    @Override
    public String getMessage()
    {
        return messages.isEmpty() ? null : messages.getFirst();
    }
    
    // -------------------------------------------------------------------------
    // level stats
    // -------------------------------------------------------------------------
    
    @Override
    public int getCurrentBottles()
    {
        return souls;
    }
    
    @Override
    public int getMaxBottles()
    {
        return maxSouls;
    }
    
    @Override
    public void addBottles(int score)
    {
        souls += score;
    }
    
    @Override
    public float getTime()
    {
        return time;
    }
    
    // -------------------------------------------------------------------------
    // controlling
    // -------------------------------------------------------------------------
    
    @Override
    public void tick()
    {
        if(!messages.isEmpty() && Keys.ENTER.getTime() == 1)
        {
            messages.removeFirst();
        }

        time += Game.SECS_PER_TICK;
        Game.get().tickTiles();

        tickEntities();
    }  
    
    @Override
    protected void onReset()
    {
        Game.get().resetTiles(this);
        data.activateEntities();
        souls = 0;
        time = 0.0f;
        Entity h = spawnHero(true);
        setHero(h);
        removeEntities();
        spawnEntity(h);
        messages.clear();
        setAmbientLight(1.0f, 1.0f, 1.0f);
        
        getTileUpdater().updateAll();
        
        callEvent("level_reset");
    }
    
    public Entity spawnHero(boolean first)
    {
        Point p;
        if(getHero() == null || getHero().getX() < 0 || first)
        {
            // first spawn or out of map, use first spawn
            p = spawns.first();
        }
        else
        {
            // hero is somewhere in the map, getting last spawn
            p = spawns.floor(new Point(Utils.toBlock(getHero().getX()), Utils.toBlock(getHero().getY())));
            if(p == null)
            {
                p = spawns.first();
            }
        }       
        return EntityBuilder.buildHero(this, Utils.toCoord(p.getX()), Utils.toCoord(p.getY()));
    }
         
    // -------------------------------------------------------------------------
    // scripting
    // -------------------------------------------------------------------------
    
    @Override
    public void callEvent(String name, Consumer<Script> before, Consumer<Script> after)
    {
        if(levelScript != null)
        {
            //Level l = Game.get().getCurrentLevel();
            //Game.get().setCurrentLevel(this);
            Game.get().getParser().callEvent(name, levelScript, before, after);
            //Game.get().setCurrentLevel(l);
        }
    }
}