package ru.deadsoftware.cavecraft.game;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector3;
import ru.deadsoftware.cavecraft.GameScreen;
import ru.deadsoftware.cavecraft.game.objects.Player;

public class GameRenderer {

    private GameProc gameProc;

    public Vector3 camTargetPos;
    public OrthographicCamera camera;
    ShapeRenderer shapeRenderer;

    public GameRenderer(GameProc gameProc) {
        Gdx.gl.glClearColor(0f,.6f,.6f,1f);
        this.gameProc = gameProc;
        camera = new OrthographicCamera();
        camera.setToOrtho(true, 320,
                320*((float)GameScreen.getHeight()/GameScreen.getWidth()));
        camera.position.x=0;
        camera.position.y=0;
        camTargetPos = camera.position.cpy();
        shapeRenderer = new ShapeRenderer();
        shapeRenderer.setProjectionMatrix(camera.combined);
        shapeRenderer.setAutoShapeType(true);
    }

    private void setColor(int r, int g, int b) {
        shapeRenderer.setColor(r/255f, g/255f, b/255f, 1f);
    }

    private void fillRect(float x, float y, float w, float h) {
        shapeRenderer.set(ShapeRenderer.ShapeType.Filled);
        shapeRenderer.rect(x,y,w,h);
    }

    private void drawRect(float x, float y, float w, float h) {
        shapeRenderer.set(ShapeRenderer.ShapeType.Line);
        shapeRenderer.rect(x,y,w,h);
    }

    private void drawWorld() {
        int minX = (int) (camera.position.x/16);
        int minY = (int) (camera.position.y/16);
        int maxX = (int) ((camera.position.x+camera.viewportWidth)/16)+1;
        int maxY = (int) ((camera.position.y+camera.viewportHeight)/16)+1;
        if (minX<0) minX=0;
        if (minY<0) minY=0;
        if (maxX>=gameProc.world.getWidth()) maxX = gameProc.world.getWidth()-1;
        if (maxY>=gameProc.world.getHeight()) maxY = gameProc.world.getHeight()-1;
        for (int y=minY; y<maxY; y++) {
            for (int x=minX; x<maxX; x++) {
                if (gameProc.world.getForeMap(x,y)>0) {
                    setColor(128,128,128);
                    fillRect(x*16-camera.position.x,
                            y*16-camera.position.y,16,16);
                    setColor(0,0,0);
                    drawRect(x*16-camera.position.x,
                            y*16-camera.position.y,16,16);
                } else {
                    if (gameProc.world.getBackMap(x,y)>0) {
                        setColor(64,64,64);
                        fillRect(x*16-camera.position.x,
                                y*16-camera.position.y,16,16);
                        setColor(0,0,0);
                        drawRect(x*16-camera.position.x,
                                y*16-camera.position.y,16,16);
                    }
                }

            }
        }
        shapeRenderer.setColor(Color.ORANGE);
        drawRect(gameProc.cursorX*16-camera.position.x,
                gameProc.cursorY*16-camera.position.y,16,16);
    }

    private void drawPlayer(Player pl) {
        setColor(0,128,0);
        fillRect(pl.position.x - camera.position.x,
                pl.position.y - camera.position.y, pl.width, pl.height);
    }

    public void render() {
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        shapeRenderer.begin();
        drawWorld();
        drawPlayer(gameProc.player);
        shapeRenderer.end();
    }

}