#include "ImageViewer.h"

ImageViewer::ImageViewer(){

}

void ImageViewer::setup(){
    fbo.allocate(ofGetWindowWidth() / 2, ofGetWindowHeight() / 2, GL_RGBA);
}

void ImageViewer::update(string imagePath){
    currentImage = imagePath;
    if (currentImage != lastImage){
        setImage(currentImage);
        lastImage = currentImage;
    }
}

void ImageViewer::draw(){
    if(displayImage.isAllocated())
        calcImageScalePos();
}

void ImageViewer::setImage(std::string imagePath){
    if(displayImage.isAllocated())
        displayImage.clear();
    displayImage.load("images/rte-archive-football/" + imagePath);
}

void ImageViewer::calcImageScalePos(){
    // Get the window dimensions
    int windowWidth = ofGetWidth();
    int windowHeight = ofGetHeight();

    // Calculate the target width and height for the bottom left quadrant
    int targetWidth = windowWidth / 3;
    int targetHeight = windowHeight / 3;

    // Calculate scaling factors to cover the entire quadrant
    float scaleX = (float)targetWidth / (float)displayImage.getWidth();
    float scaleY = (float)targetHeight / (float)displayImage.getHeight();

    // Choose the larger scale factor to ensure the image covers the quadrant
    float scale = std::max(scaleX, scaleY);

    // Calculate the scaled width and height of the image
    int scaledWidth = displayImage.getWidth() * scale;
    int scaledHeight = displayImage.getHeight() * scale;

    // Calculate the position offsets to center the image in the quadrant
    int offsetX = (scaledWidth - targetWidth) / 2;
    int offsetY = (scaledHeight - targetHeight) / 2;

    // Begin drawing into the FBO
    fbo.begin();
    ofClear(0, 0, 0, 0); // Clear the FBO with a transparent color

    // Draw the image, scaled and centered, into the FBO
    displayImage.draw(-offsetX, -offsetY, scaledWidth, scaledHeight);

    // End drawing into the FBO
    fbo.end();

    // Draw the FBO onto the screen at the bottom-left quadrant
    fbo.draw(0, 2 * windowHeight / 3);
}