#include <stdio.h>

#include "roof.h"
#include "roof-read.h"

RoofReadContext *roof_read_context_new(RoofConfig *cfg, RoofReadInterface *rdi, GError **error) {
    guint i;
    GError *gerr = NULL;

    RoofReadContext *rdc = (RoofReadContext*)calloc(1, sizeof(RoofReadContext));
    if (!rdc) roof_new_error(error, "Can't allocate RoofReadContext");

    rdc->cfg = cfg;
    rdc->rdi = rdi;

    return rdc;
}

void roof_read_context_free(RoofReadContext *rdc) {
    if (rdc) {
	free(rdc);
    }
}

void roof_read(RoofReadContext *rdc, RoofBufferInterface *bfi, GError *error) {
    uint8_t *rdbuf = rdc->rdbuf;
    guint n_packets = rdc->n_packets;
    guint packet_id = rdc->packet_id;
    guint fragment_id = rdc->fragment_id;
    GError *gerr = NULL;

    ReadRoofInterface *rdi = rdc->rdi;

    if (rdc->rdbuf) {
	rdbuf = rdc->rdbuf;
	packets
    else {
	guint packets = rdi->read(rdi[stream_id], &rdbuf, &gerr);
	if (gerr) roof_propagate_error(error, gerr, "roof_read: ");
	packet_id = 0; 
	fragment_id  = 0;
    }

    packet = rdbuf + packet_id * (size + padding

    while (packet) {


    while (rdbuf) {
	// 

        for (guint i = 0; i < packets; i++) {
	    guint64 packet_id = 0;

        	    // Otherwise considered consecutive and handled by the buffer
	    if (cfg->header_size >= sizeof(RoofPacketHeader)) {
        	RoofPacketHeader *pheader = ROOF_PACKET_HEADER(fragment); 
        	packet_id = be64toh(pheader->packet_id) + 1;
	    } else {
                // FIXME: consider consecutive
                //fragment_id = ++buffer->stream_fragment[stream_id];
            }

                // FIXME: packet may contain fragments for multiple datasets
            fragment_id = packet_id * fragments_per_packet;
            guint64 dataset_id = (packet_id - 1) / cfg->fragments_per_stream;
            guint64 fragment_id = (packet_id - 1) % cfg->fragments_per_stream;

                // FIXME: verify that packet is consecutive
            // if

                // Drop packets of already skipped datasets
            if (dataset_id < priv->current_id) 
                continue;

                // FIXME: stop processing and return....
            if (dataset_id < priv->current_id)

	    uint8_t *fragment_buffer = dataset_buffer + 
		stream_id * fragment_dims[0] +					// x-coordinate
		(fragment_id * fragment_dims[1]) * dataset_dims[0];	// y-coordinate

	for (guint i = 0; i < buffer->fragment_dims[1]; ++i) {
	    memcpy(fragment_buffer + i * buffer->dataset_dims[0], (uint8_t*)fragment + i * buffer->fragment_dims[0], buffer->fragment_dims[0]);


//    buffer->last_id[stream_id] = dataset_id;

		ready |= roof_buffer_set_fragment(buf, sid, packet_id, fragment, &gerr);
		if (gerr) roof_print_error(gerr);

		fragment += cfg->max_packet_size;
            

        }


    }




    void *buf = roof_buffer_get_dataset(bfi, ?);

	// Computing offsets each time, etc.
    roof_buffer_set_fragment
}