package com.codigoparallevar.minicards;

import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import androidx.annotation.NonNull;

import com.codigoparallevar.minicards.types.functional.Tuple2;

public class ScrolledCanvas {
    private final Canvas canvas;
    private final int xOrig;
    private final int yOrig;

    public ScrolledCanvas(Canvas canvas, Tuple2<Integer, Integer> viewOrigin) {
        this.canvas = canvas;
        this.xOrig = viewOrigin.item1;
        this.yOrig = viewOrigin.item2;
    }

    public void drawLine(float startX, float startY, float stopX, float stopY,
                         @NonNull Paint paint) {
        canvas.drawLine(startX - xOrig, startY - yOrig,
                stopX - xOrig, stopY - yOrig, paint);
    }

    public void drawRect(@NonNull Rect r, @NonNull Paint paint) {
        canvas.drawRect(r.left - xOrig, r.top - yOrig,
                r.right - xOrig, r.bottom - yOrig,
                paint);
    }

    public void drawCircle(float cx, float cy, float radius, @NonNull Paint paint) {
        canvas.drawCircle(cx - xOrig, cy - yOrig,
                radius, paint);
    }

    public void drawPath(@NonNull Path path, @NonNull Paint paint) {
        Path offsetPath = new Path(path);
        offsetPath.offset(-xOrig, -yOrig);
        canvas.drawPath(offsetPath, paint);
    }


    public void drawCenteredText(String text, int x, int y, Paint paint) {
        paint.setTextAlign(Paint.Align.LEFT);
        Rect r = new Rect();

        paint.getTextBounds(text, 0, text.length(), r);
        x = x + (int) (r.width() / 2f - r.left);
        y = y + (int) (r.height() / 2f - r.bottom);
        drawText(text, x, y, paint);
    }

    public void drawText(String text, int x, int y, Paint paint) {
        canvas.drawText(text, x - xOrig, y - yOrig, paint);
    }
}