package sig.objects;

import java.awt.event.KeyEvent;

import sig.RabiClone;
import sig.engine.Action;
import sig.engine.Alpha;
import sig.engine.Font;
import sig.engine.Key;
import sig.engine.MouseScrollValue;
import sig.engine.PaletteColor;
import sig.engine.Panel;
import sig.engine.Sprite;
import sig.engine.Transform;
import sig.engine.objects.AnimatedObject;
import sig.engine.objects.Object;
import sig.engine.String;
import sig.map.Background;
import sig.map.DataTile;
import sig.map.Map;
import sig.map.Tile;
import sig.objects.actor.PhysicsObject;
import sig.objects.actor.RenderedObject;
import sig.objects.actor.State;

public class LevelRenderer extends Object{

    final static double staggerJitterWaitTime=0.03;

    double staggerTimer=0;
    int staggerOffsetX=2;

    public final static byte MAX_RIPPLE_SIZE = (byte)4;
    public final static byte RIPPLE_CHANCE = (byte)3;
    public final static byte RIPPLE_DROP_CHANCE = (byte)6;
    /**
    *Ripples will store bit 8 for the direction the ripple is moving. Bits 1-7 are used as the actual value for ripples up to 64 in size (Half used for movement in each direction).
    */
    byte[] ripples = new byte[RabiClone.BASE_HEIGHT/MAX_RIPPLE_SIZE];
    byte[] extraStorage = new byte[RabiClone.BASE_WIDTH];
    double nextRipple = 0;

    public LevelRenderer(Panel panel) {
        super(panel);
        this.setSprite(Sprite.TILE_SHEET);
    }

   @Override 
    public void update(double updateMult) {
        for (int y=(int)(this.getY()/Tile.TILE_HEIGHT)-RabiClone.EVENT_BOUNDARY_RANGE;y<(int)(RabiClone.BASE_HEIGHT/Tile.TILE_HEIGHT+this.getY()/Tile.TILE_HEIGHT+1+RabiClone.EVENT_BOUNDARY_RANGE);y++) {
            if (y<0||y>Map.MAP_HEIGHT) {
                continue;
            }
            for (int x=(int)(0+this.getX()/Tile.TILE_WIDTH)-RabiClone.EVENT_BOUNDARY_RANGE;x<(int)(RabiClone.BASE_WIDTH/Tile.TILE_WIDTH+this.getX()/Tile.TILE_WIDTH+1+RabiClone.EVENT_BOUNDARY_RANGE);x++) {
                if (x<0||x>Map.MAP_WIDTH) {
                    continue;
                }
                if (RabiClone.CURRENT_MAP.getDataTileRawValue(x,y)<8192&&RabiClone.CURRENT_MAP.getDataTile(x,y)!=DataTile.NULL) {
                    if (!RabiClone.CURRENT_MAP.getDataTile(x,y).getEvent().perform(x*Tile.TILE_WIDTH,y*Tile.TILE_HEIGHT)) {
                        RabiClone.CURRENT_MAP.ModifyDataTile(x, y, DataTile.NULL);
                    }
                }
            }
        }
        if ((staggerTimer-=updateMult)<=0) {
            staggerOffsetX*=-1;
            staggerTimer=staggerJitterWaitTime;
        }
        if (RabiClone.player!=null&&RabiClone.player.isUnderwater()) {
            updateRipples(updateMult);
        }
    }

    private void updateRipples(double updateMult) {
        if ((nextRipple-=updateMult)<0) {
            if (Math.random()*RIPPLE_CHANCE<1) {
                int selectedIndex=(int)(Math.random()*ripples.length);
                if (ripples[selectedIndex]==0) {
                    if (Math.random()<0.5) {
                        ripples[selectedIndex]=(byte)(MAX_RIPPLE_SIZE|0b10000000);
                    } else {
                        ripples[selectedIndex]=(byte)(MAX_RIPPLE_SIZE|0b00000000);
                    }
                }
            }
            for (int i=0;i<ripples.length;i++) {
                if (ripples[i]!=0) {
                    if ((byte)(ripples[i]>>>7)==-1) {
                        //We are moving left.
                        ripples[i]=(byte)(0b10000000|((ripples[i]&0b1111111)-1));
                        if ((ripples[i]&0b1111111)==0) //Flip the sign. 
                        {
                            ripples[i]=(byte)(((ripples[i]&0b1111111)+1));
                        } else 
                        if ((ripples[i]&0b1111111)==MAX_RIPPLE_SIZE&&Math.random()*RIPPLE_DROP_CHANCE<1) {
                            ripples[i]=0;
                        }
                    } else {
                        //We are moving right.
                        ripples[i]=(byte)((ripples[i]&0b1111111)+1);
                        if ((ripples[i]&0b1111111)==MAX_RIPPLE_SIZE*2) //Flip the sign. 
                        {
                            ripples[i]=(byte)(0b10000000|((ripples[i]&0b1111111)-1));
                        } else 
                        if ((ripples[i]&0b1111111)==MAX_RIPPLE_SIZE&&Math.random()*RIPPLE_DROP_CHANCE<1) {
                            ripples[i]=0;
                        }
                    }
                }
            }
            nextRipple=0.2;
        }
    }

    @Override
    public void draw(byte[] p) {
        for (int y=(int)(this.getY()/Tile.TILE_HEIGHT);y<(int)(RabiClone.BASE_HEIGHT/Tile.TILE_HEIGHT+this.getY()/Tile.TILE_HEIGHT+1);y++) {
            if (y<0||y>Map.MAP_HEIGHT) {
                continue;
            }
            for (int x=(int)(0+this.getX()/Tile.TILE_WIDTH);x<(int)(RabiClone.BASE_WIDTH/Tile.TILE_WIDTH+this.getX()/Tile.TILE_WIDTH+1);x++) {
                if (x<0||x>Map.MAP_WIDTH) {
                    continue;
                }
                if (RabiClone.CURRENT_MAP.getTile(x,y)!=Tile.VOID) {
                    DrawTile(x*Tile.TILE_WIDTH-this.getX(),y*Tile.TILE_HEIGHT-this.getY(),RabiClone.CURRENT_MAP.getTile(x,y));
                    //System.out.println((x*Tile.TILE_WIDTH+(this.getX()%Tile.TILE_WIDTH) )+","+(y*Tile.TILE_HEIGHT+(this.getY()%Tile.TILE_HEIGHT)));
                }
            }
        }
        for (int i=0;i<RabiClone.OBJ.size();i++) {
            Object o = RabiClone.OBJ.get(i);
            if (o instanceof RenderedObject) {
                if (o instanceof AnimatedObject) {
                    Draw_Animated_Object((AnimatedObject)o,o.getSpriteTransform());
                } else {
                    Draw_Object(o,o.getSpriteTransform());
                }
            }
        }

        if (RabiClone.player!=null) {

            if (RabiClone.player.isUnderwater()) {
                drawRipples(p);
            }

            Draw_Text(4,4,new String(RabiClone.player.getYVelocity()),Font.PROFONT_12);
            Draw_Text(4,4+Font.PROFONT_12.getGlyphHeight(),new String(RabiClone.scaleTime),Font.PROFONT_12);
        }
    }

    @SuppressWarnings("unused")
    private void RenderCollisionGrid(byte[] p) {
        for (int y=0;y<RabiClone.BASE_HEIGHT;y++) {
            for (int x=0;x<RabiClone.BASE_WIDTH;x++) {
                if (RabiClone.COLLISION[((int)getY()+y)*RabiClone.BASE_WIDTH*Tile.TILE_WIDTH+((int)getX()+x)]) {
                    p[y*RabiClone.BASE_WIDTH+x]=(byte)PaletteColor.CRIMSON.ordinal();
                }
            }
        }
    }

    @Override
    public void drawBackground(byte[] p) {
        int screenX = (int)(getX())/Tile.TILE_WIDTH;
        int screenY = (int)(getY())/Tile.TILE_HEIGHT;
        Background targetBackground = RabiClone.CURRENT_MAP.getBackground(screenX, screenY);
        for (int y=0;y<RabiClone.BASE_HEIGHT;y++) {
            for (int x=0;x<RabiClone.BASE_WIDTH;x++) {
                int index = y*RabiClone.BASE_WIDTH+x;
                p[index] = targetBackground.getPixels()[
                    ((y+(int)(getY()*targetBackground.getScrollSpeed()))%targetBackground.getHeight())*targetBackground.getWidth()+((x+(int)(getX()*targetBackground.getScrollSpeed()))%targetBackground.getWidth())
                ];
            }
        }
    }

    @Override
    public void drawOverlay(byte[] p) {
        if (RabiClone.player!=null&&RabiClone.player.isUnderwater()) {
            for (int y=0;y<RabiClone.BASE_HEIGHT;y++) {
                for (int x=0;x<RabiClone.BASE_WIDTH;x++) {
                    //Draw the water background at double size because it's half the screen's width and height.
                    int index = y*RabiClone.BASE_WIDTH+x;
                    byte col = Sprite.WATER_OVERLAY.getBi_array()[(y/2)*Sprite.WATER_OVERLAY.getCanvasWidth()+(x/2)];
                    if (col!=(byte)32) {
                        p[index] = col;
                    }
                }
            }
        }
    }

    private void drawRipples(byte[] p) {
        for (int i=0;i<ripples.length;i++) {
            if (ripples[i]!=0) {
                for (int y=-MAX_RIPPLE_SIZE/2;y<MAX_RIPPLE_SIZE/2;y++) {
                    if (((i*MAX_RIPPLE_SIZE)+y)>=0&&((i*MAX_RIPPLE_SIZE)+y)<RabiClone.BASE_HEIGHT) {
                        byte displacement = (byte)((ripples[i]&0b1111111) - MAX_RIPPLE_SIZE);
                        int index = ((i*MAX_RIPPLE_SIZE)+y)*RabiClone.BASE_WIDTH;
                        if (displacement>=0) {
                            displacement-=y;
                        } else {
                            displacement+=y;
                        }
                        if (displacement>=0) {
                            for (int x=0;x<displacement;x++) {
                                extraStorage[x]=p[index+x];
                            }
                            for (int x=0;x<RabiClone.BASE_WIDTH-displacement;x++) {
                                p[index+x]=p[index+x+displacement];
                            }
                            for (int x=RabiClone.BASE_WIDTH-displacement;x<RabiClone.BASE_WIDTH;x++) {
                                p[index+x]=extraStorage[x-(RabiClone.BASE_WIDTH-displacement)];
                            }
                        } else {
                            for (int x=0;x<-displacement;x++) {
                                extraStorage[x]=p[index+(RabiClone.BASE_WIDTH-x)];
                            }
                            for (int x=RabiClone.BASE_WIDTH-1;x>=-displacement;x--) {
                                p[index+x]=p[index+x+displacement];
                            }
                            for (int x=0;x<-displacement;x++) {
                                p[index+x]=extraStorage[x];
                            }
                        }
                    }
                }
            }
        }
    }

    @SuppressWarnings("unused")
    private void RenderPlayerCollisionGrid(byte[] p) {
        for (int y=0;y<RabiClone.BASE_HEIGHT;y++) {
            for (int x=0;x<RabiClone.BASE_WIDTH;x++) {
                if (RabiClone.PLAYER_COLLISION[y*RabiClone.BASE_WIDTH+x]) {
                    p[y*RabiClone.BASE_WIDTH+x]=(byte)PaletteColor.MANTIS.ordinal();
                }
            }
        }
    }

    /**
     * Draws an object where its sprite is centered among its position and drawn relative to the camera position.
     * @param object
     */
    protected void Draw_Object(Object object) {
        super.Draw_Sprite(object.getX()-this.getX()-object.getSprite().getWidth()/2, Math.round(object.getY()-this.getY()-object.getSprite().getHeight()/2), object.getSprite());
    }

    protected void Draw_Object(Object object, Transform transform) {
        super.Draw_Sprite(object.getX()-this.getX()-object.getSprite().getWidth()/2, Math.round(object.getY()-this.getY()-object.getSprite().getHeight()/2), object.getSprite(), transform);
    }

    protected void Draw_Animated_Object(AnimatedObject object) {
        Draw_Animated_Object(object,Transform.NONE);
    }

    protected void Draw_Animated_Object(AnimatedObject object, Transform transform){
        if (object instanceof PhysicsObject) {
            PhysicsObject po = (PhysicsObject)object;
            super.Draw_Animated_Sprite(object.getX()-this.getX()-object.getAnimatedSpr().getWidth()/2+(po.state==State.STAGGER?staggerOffsetX:0), Math.round(object.getY()-this.getY()-object.getAnimatedSpr().getHeight()/2), object.getAnimatedSpr(), object.getCurrentFrame(), object.getTransparency(), transform);
        } else {
            super.Draw_Animated_Sprite(object.getX()-this.getX()-object.getAnimatedSpr().getWidth()/2, Math.round(object.getY()-this.getY()-object.getAnimatedSpr().getHeight()/2), object.getAnimatedSpr(), object.getCurrentFrame(), object.getTransparency(), transform);
        }
    }

    private void DrawTile(double x, double y, Tile tile) {
        Draw_Sprite_Partial(x,y, tile.getSpriteSheetX()*tile.getTileWidth(), tile.getSpriteSheetY()*tile.getTileHeight(), tile.getTileWidth(), tile.getTileHeight(), getSprite(), 0, Alpha.ALPHA0, Transform.NONE);
    }

    protected void DrawTransparentTile(double x, double y, Tile tile, Alpha alpha) {
        Draw_Sprite_Partial_Ext(x,y, tile.getSpriteSheetX()*tile.getTileWidth(), tile.getSpriteSheetY()*tile.getTileHeight(), tile.getTileWidth(), tile.getTileHeight(), getSprite(), alpha, Transform.NONE);
    }

    @Override
    @SuppressWarnings("incomplete-switch")
    public void KeyPressed(Action a) {
        switch(a) {
            case LEVEL_EDITOR:{
                RabiClone.OBJ.clear();
                RabiClone.ResetGame();
                Map.LoadMap(RabiClone.CURRENT_MAP);
                RabiClone.OBJ.add(RabiClone.level_renderer = new EditorRenderer(RabiClone.p));
            }break;
        }
        if (Key.isKeyHeld(KeyEvent.VK_F3)) {
            RabiClone.OBJ.clear();
            RabiClone.ResetGame();
            RabiClone.OBJ.add(RabiClone.control_settings_menu = new ConfigureControls(RabiClone.p));
        }
    }
    
    @Override
    public Transform getSpriteTransform() {
        return Transform.NONE;
    }
}