#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

#include "transformations.h"

struct bmp_header* read_bmp_header(FILE* stream){

    if(stream == NULL){
        return NULL;
    }

    struct bmp_header* bmpHeader =malloc(sizeof(struct bmp_header));

    int res = fread (bmpHeader, sizeof (struct bmp_header), 1, stream);

    if( !res ) {
        free(bmpHeader);
        return NULL;
    }

    return bmpHeader;

}

struct pixel* read_data(FILE* stream, const struct bmp_header* header){

    if (stream == NULL || header == NULL){
        return NULL;
    }

    uint32_t height = header->height;
    uint32_t width = header->width;
    uint32_t padding = width%4;

    struct pixel* image_data = malloc(sizeof(struct pixel)*height*width);

    fseek (stream, sizeof(struct bmp_header), 0);

    for (uint32_t i = 0; i < height; i++){
        //
        for(uint32_t j = 0;j<width;j++){
            //
            fread (&image_data[(i*width)+j], sizeof (struct pixel), 1, stream);
        }
        //
        fseek (stream, padding, SEEK_CUR);
//
    }

    return image_data;

}

struct bmp_image* read_bmp(FILE* stream){

    struct bmp_image* image = malloc(sizeof(struct bmp_image));

    if(stream == NULL){
        return NULL;
    }

    image->header = read_bmp_header(stream);
    image->data = read_data(stream, image->header);

    for (int i = 0; i < image->header->width*image->header->height; ++i) {
        printf("%d %d %d\n", image->data[i].red, image->data[i].green, image->data[i].blue);
    }

    return image;

}