#include "../include/ImageReader.h"

using namespace openshot;

ImageReader::ImageReader(string path) throw(InvalidFile) : path(path)
{
	// Init FileInfo struct (clear all values)
	InitFileInfo();

	// Open the file (if possible)
	Open();

	// Get 1st frame
	GetFrame(1);
}

// Open image file
void ImageReader::Open()
{
	// Attempt to open file
	Magick::Image* source = NULL;
	try
	{
		// load image
		source = new Magick::Image(path);
	}
	catch (Magick::Exception e) {
		// raise exception
		throw InvalidFile("File could not be opened.", path);
	}

	// Create or get frame object
	image_frame = new Frame(1, source->size().width(), source->size().height(), "#000000", 0, 2);

	// Add Image data to frame
	image_frame->AddImage(source);


	// Update image properties
	info.has_audio = false;
	info.has_video = true;
	info.file_size = source->fileSize();
	info.vcodec = source->format();
	info.width = source->size().width();
	info.height = source->size().height();
	info.pixel_ratio.num = 1;
	info.pixel_ratio.den = 1;
	info.duration = 60 * 60 * 24; // 24 hour duration
	info.fps.num = 30;
	info.fps.den = 1;
	info.video_timebase.num = 1;
	info.video_timebase.den = 30;
	info.video_length = round(info.duration * info.fps.ToDouble());

	// Calculate the DAR (display aspect ratio)
	Fraction size(info.width * info.pixel_ratio.num, info.height * info.pixel_ratio.den);

	// Reduce size fraction
	size.Reduce();

	// Set the ratio based on the reduced fraction
	info.display_ratio.num = size.num;
	info.display_ratio.den = size.den;
}

// Close image file
void ImageReader::Close()
{
	// Deallocate frame
	delete image_frame;
}

// Get an openshot::Frame object for a specific frame number of this reader.
Frame* ImageReader::GetFrame(int requested_frame) throw(InvalidFile)
{
	if (image_frame)
		// Always return same frame (regardless of which frame number was requested)
		return image_frame;
	else
		// no frame loaded
		throw InvalidFile("No frame could be created from this type of file.", path);
}