package com.ulfben.agp18.platformer;
//Created by Ulf Benjaminsson (ulfben) on 2018-03-10.
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;
import java.util.Locale;

/* Add to Viewport.java:
 @Override
    public String toString(){
        return String.format(Locale.getDefault(),"Viewport [%dpx, %dpx / %.1fm, %.1fm]", mScreenWidth, mScreenHeight, mMetersToShowX, mMetersToShowY);
    }
*/
/*
add to Game.java, in update()
       DebugTextRenderer.CAMERA_INFO = mCamera.toString();
        DebugTextRenderer.PLAYER_POSITION.x = mLevel.mPlayer.x;
        DebugTextRenderer.PLAYER_POSITION.y = mLevel.mPlayer.y;
        DebugTextRenderer.PLAYER_VEL.x = mLevel.mPlayer.mVelocity.x;
        DebugTextRenderer.PLAYER_VEL.y = mLevel.mPlayer.mVelocity.y;
        DebugTextRenderer.TOTAL_OBJECT_COUNT = mLevel.mEntities.size();
        DebugTextRenderer.VISIBLE_OBJECTS = mVisibleEntities.size();
        DebugTextRenderer.FRAMERATE = 0;
*/


class DebugTextRenderer {
    private DebugTextRenderer(){super();}
    //Updated from the GameEngine
    static int VISIBLE_OBJECTS = 0;
    static int TOTAL_OBJECT_COUNT = 0;
    static final PointF PLAYER_POSITION = new PointF(0f,0f);
    static final PointF PLAYER_VEL = new PointF(0f,0f);
    static int FRAMERATE = 0;
    static String CAMERA_INFO = "";

    private final static String[] DBG_STRINGS = new String[4];
    //[0] = CAMERA_INFO
    private final static String DBG_OBJ_RENDER_COUNT =  "Objects rendered: %d / %d"; //[1] rendering stats
    private final static String DBG_PLAYER_INFO =  "Player: [%.2f, %.2f / %.2f, %.2f]"; //[2] player position and velocity
    private final static String DBG_UPS = "FPS: %d"; //[3] frames per second
    private final static Locale LOCALE = Locale.getDefault();

    private static void updateDebugStrings(){
        DBG_STRINGS[0] = CAMERA_INFO;
        DBG_STRINGS[1] = String.format(LOCALE, DBG_OBJ_RENDER_COUNT, VISIBLE_OBJECTS,  TOTAL_OBJECT_COUNT);
        DBG_STRINGS[2] = String.format(LOCALE, DBG_PLAYER_INFO,  PLAYER_POSITION.x,  PLAYER_POSITION.y, PLAYER_VEL.x, PLAYER_VEL.y);
        DBG_STRINGS[3] = String.format(LOCALE, DBG_UPS, FRAMERATE);
    }

    static void render(final Canvas canvas, final Viewport camera, final Paint paint){
        final int textSize = 20;
        final int margin = 10;
        int y = camera.getScreenHeight()-margin;
        paint.setTextSize(textSize);
        paint.setTextAlign(Paint.Align.LEFT);
        paint.setColor(Color.WHITE);
        updateDebugStrings();
        for(final String s : DBG_STRINGS){
            canvas.drawText(s, margin, y, paint);
            y -= textSize;
        }
    }
}