#ifdef WIN32
	#include <winsock.h>
#else
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <netdb.h>
	#include <arpa/inet.h>
#endif
#include <string.h>
#include <stdlib.h>
#include "datum.h"
#include "structs.h"
#include "vis_threading.h"
#include "interp.h"

#ifdef WIN32
	#define VIS_CloseSocket(sock)	closesocket(sock)
#else
	#define VIS_CloseSocket(sock)	close(sock)
#endif

#define NET_SEARCH_BUFFER_SIZE 512

typedef struct netbuffer {
	char buffer[NET_SEARCH_BUFFER_SIZE];
	int index;
	struct netbuffer * next;	
} netbuffer;
/*
typedef struct 
{
	int sockfd;
	netbuffer * buffers;
	VIS_CRITICAL_SECTION(lock)
} net_client_data;*/

int send_all(int sockfd, char * data, int len)
{
	int sent = 0;
	int temp;
	while(sent < len)
	{
		temp = send(sockfd, data+sent, len-sent, 0);
		if(temp < 0)
		{
			DEBUGPUTS("send_all() failed\n");
			return 0-sent;
		}
		sent += temp;
	}
	return sent;
}

int recv_all(int sockfd, char * data, int len)
{
	int temp;
	int received = 0;
	while(received < len)
	{
		temp = recv(sockfd, data, len-received, 0);
		if(temp < 0)
		{
			return 0 - received;
		}
		received += temp;	
	}
	return received;
}

int net_client_new(datum ** params, queue_entry * worker_entry)
{
	int sockfd, i;
	//net_client_data * net;
	struct sockaddr_in dest;
	struct hostent * h;
	char * host = params[0]->c.generic.data;
	int hostlen = params[0]->c.generic.len;
	for(i = 0; i < hostlen; ++i)
		if((host[i] < '0' || host[i] > '0') && host[i] != '.')
		{
			h = gethostbyname(host);
			if(!h)
			{
				release_ref(params[0]);
				release_ref(params[1]);
				params[0] = NULL;
				params[1] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, worker_entry->instance->def->program);
				params[1]->c.integers.num_a = 0;
				return 0;
			}
			host = inet_ntoa(*((struct in_addr *)h->h_addr));
			break;
		}
	sockfd = socket(PF_INET, SOCK_STREAM, 0);
	
	dest.sin_family = AF_INET;
	dest.sin_port = htons(params[1]->c.integers.num_a);
	dest.sin_addr.s_addr = inet_addr(host);
	memset(&(dest.sin_zero), '\0', 8);
	
	release_ref(params[0]);
	release_ref(params[1]);
	params[0] = params[1] = NULL;
	
	if(connect(sockfd, (struct sockaddr *)&dest, sizeof(struct sockaddr)) != 1)
	{
		params[0] = new_datum(BUILTIN_TYPE_NETCLIENT, 2, 0, worker_entry->instance->def->program);//sizeof(net_client_data));
		params[0]->c.integers.num_a = sockfd;
		/*net = params[0]->c.generic.data;
		net->sockfd = sockfd;
		net->buffers = NULL;*/
		
//		VIS_InitializeCriticalSection(net->lock);
		DEBUGPUTS("Connection established\n");
	}
	else
	{
		params[1] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, worker_entry->instance->def->program);
		params[1]->c.integers.num_a = 0;
		DEBUGPUTS("connect() failed\n");
	}
	return 0;
}

int net_client_put_string(datum ** params, queue_entry * worker_entry)
{
	//net_client_data * net = params[0]->c.generic.data;
	//int sockfd = net->sockfd;
	int sockfd = params[0]->c.integers.num_a;
	int to_send = params[1]->c.generic.len-1;
	char * data = params[1]->c.generic.data;
	int sent;
	if(to_send)
	{
		sent = send_all(sockfd, data, to_send);
		
		if(sent != to_send)
		{
			release_ref(params[0]);
			release_ref(params[1]);
			params[0] = NULL;
			params[1] = new_datum(BUILTIN_TYPE_WHOLE, 2, 0, worker_entry->instance->def->program);
			params[1]->c.integers.num_a = 0-sent;
			DEBUGPUTS("send() failed\n");
			return 0;
		}
	}
	DEBUGPRINTF("Sent %s\n", data);
	release_ref(params[1]);
	params[1] = NULL;
	return 0;
}

int net_client_get_fstring(datum ** params, queue_entry * worker_entry)
{
	char * buf;
	//net_client_data * net = params[0]->c.generic.data;
	//int sockfd = net->sockfd;
	int sockfd = params[0]->c.integers.num_a;
	int to_receive = params[1]->c.integers.num_a;
	int temp, received = 0;
	datum * output = new_datum(BUILTIN_TYPE_STRING, 1, params[1]->c.integers.num_a+1, worker_entry->instance->def->program);
	release_ref(params[1]);
	buf = output->c.generic.data;
	while(received < to_receive)
	{
		temp = recv(sockfd, buf+received, to_receive-received, 0);
		if(temp < 0)
		{
			release_ref(params[0]);
			params[0] = params[1] = NULL;
			params[2] = output;
			return 0;
		}
		received += temp;	
	}
	params[1] = output;
	params[2] = NULL;
	return 0;
}

int net_client_get_dstring(datum ** inputlist, queue_entry * worker_entry)
{
	BOOL found = FALSE;
	netbuffer buf;
	netbuffer * current, *first, *temp,*temp2;
	int i,j,k,startk;
	int found_entry;
	int string_offset;
	int search_offset;
	netbuffer * search_start;
	int search_start_offset;
	int *search_offsets;
	netbuffer ** search_starts;
	int *search_start_offsets;
	int read_bytes;
	int buf_pos;
	int sockfd = inputlist[0]->c.integers.num_a;
	//net_client_data * net = inputlist[0]->c.generic.data;
	
	list_data * list;
	if(inputlist[1]->company->type_id == BUILTIN_TYPE_LIST)
	{
		
		list = ((list_data *)inputlist[1]->c.generic.data);
		DEBUGPRINTF("Delimeter input is a list with %d entries.\n", list->num_entries);
		search_offsets = malloc(sizeof(int) * (list->num_entries));
		DEBUGPRINTF("Allocated %d bytes.\n", sizeof(int) * (list->num_entries));
		search_starts = malloc(sizeof(netbuffer *) * (list->num_entries));
		DEBUGPRINTF("Allocated %d bytes.\n", sizeof(netbuffer *) * (list->num_entries));
		search_start_offsets = malloc(sizeof(int) * (list->num_entries));
		DEBUGPRINTF("Allocated %d bytes.\n", sizeof(int) * (list->num_entries));
		for(i = 0; i < list->num_entries; ++i)
		{
			DEBUGPRINTF("Setting search_offsets[%d] = 0.\n", i);
			search_offsets[i] = 0;
		}
	}
	search_offset = 0;
		first = &buf;
		first->next = NULL;
		current = first;
		current->index = 0;
		first = current;
		read_bytes = 1;
		while(!found && read_bytes == 1)
		{
			buf_pos = 0;
			for(i = 0; i < NET_SEARCH_BUFFER_SIZE && !found; ++i)
			{
				if(i >= buf_pos)
				{
					read_bytes = recv(sockfd, current->buffer+i, 1, 0);
					if(read_bytes != 1)
						break;
					++buf_pos;
				}
				DEBUGPRINTF("Checking character #%d (%c)\n", i, current->buffer[i]);
				switch(inputlist[1]->company->type_id)
				{
				case BUILTIN_TYPE_WHOLE:
					if((int)current->buffer[i] == inputlist[1]->c.integers.num_a)
					{
						found = TRUE;
						search_offset = 1;
						search_start = current;
						search_start_offset = i;
					}
					break;
				case BUILTIN_TYPE_STRING:
					DEBUGPRINTF("Comparing with character %d of delim: %c (%X)\n", search_offset, ((char *)inputlist[1]->c.generic.data)[search_offset], ((char *)inputlist[1]->c.generic.data)[search_offset]);
					if(current->buffer[i] == ((char *)inputlist[1]->c.generic.data)[search_offset])
					{
						if(search_offset == 0)
						{
							search_start = current;
							search_start_offset = i;
						}
						++search_offset;
						DEBUGPRINTF("Search offset is: %d, delim len is: %d\n", search_offset, (inputlist[1]->c.generic.len-1));
						if(search_offset == (inputlist[1]->c.generic.len-1))
						{
							found = TRUE;
							DEBUGPUTS("Matched delim\n");
						}
					}
					else
					{
						if(search_offset > 0)
						{
							current = search_start;
							i = search_start_offset;
						}
						search_offset = 0;
					}
					break;
				case BUILTIN_TYPE_LIST:
					for(j = 0; j < list->num_entries; ++j)
					{
						DEBUGPRINTF("Testing list entry %d against character %d in buffer %d\n", j, i, current->index);
						if(list->entries[j]->company->type_id == BUILTIN_TYPE_WHOLE && (int)current->buffer[i] == list->entries[j]->c.integers.num_a)
						{
							DEBUGPUTS("Matched whole number entry.\n");
							found = TRUE;
							found_entry = j;
							search_offset = 1;
							search_start = current;
							search_start_offset = i;
							break;
						}
						else if(list->entries[j]->company->type_id == BUILTIN_TYPE_STRING)
						{
							DEBUGPUTS("String entry.\n");
							if(current->buffer[i] == ((char *)list->entries[j]->c.generic.data)[search_offsets[j]])
							{
								DEBUGPRINTF("%c in buffer matches character #%d in entry.\n", current->buffer[i], search_offsets[j]);
								if(search_offsets[j] == 0)
								{
									search_starts[j] = current;
									search_start_offsets[j] = i;
								}
								++search_offsets[j];
								if(search_offsets[j] == (list->entries[j]->c.generic.len-1))
								{
									DEBUGPUTS("Entire string matched.\n");
									found = TRUE;
									found_entry = j;
									search_offset = search_offsets[j];
									search_start = search_starts[j];
									search_start_offset = search_start_offsets[j];
									break;
								}
							}
							else if(search_offsets[j] > 0)
							{
								DEBUGPRINTF("%c in bufer does not match character #%d in entry.\n", current->buffer[i], search_offsets[j]);
								temp = search_starts[j];
								search_offsets[j] = 0;
								startk = search_start_offsets[j];
								while(temp && !found)
								{
									DEBUGPRINTF("Scanning block %d for possible missed match from %d to %d.\n", temp->index, startk, (temp == current ? i : NET_SEARCH_BUFFER_SIZE)-1);
									for(k = startk; k < (temp == current ? i : NET_SEARCH_BUFFER_SIZE); ++k)
									{
										if(temp->buffer[k] == ((char *)list->entries[j]->c.generic.data)[search_offsets[j]])
										{
											if(!search_offsets[j])
											{
												search_starts[j] = temp;
												search_start_offsets[j] = k;
											}
											++search_offsets[j];
											if(search_offset == (list->entries[j]->c.generic.len-1))
											{
												found = TRUE;
												found_entry = j;
												search_start = search_starts[j];
												search_start_offset = search_start_offsets[j];
											}
										}
										else
										{
											if(search_offsets[j] > 0)
											{
												temp = search_starts[j];
												k = search_start_offsets[j];
											}
											search_offsets[j] = 0;
										}
									}
									startk = 0;
									temp = temp->next;
								}
								
							}
							else
								search_offsets[j] = 0;
							
						}
					}
					break;
				}
			}
			if(!found && read_bytes == 1)
			{
				current->next = malloc(sizeof(netbuffer));
				current->next->index = current->index+1;
				//current->next->offset = current->next->filled = 0;
				current->next->next = NULL;
				current = current->next;
			}
		}
	if(inputlist[1]->company->type_id == BUILTIN_TYPE_LIST)
	{
		VIS_FREE(search_offsets, "Get DString@Net Clinet, search offsets");
		VIS_FREE(search_starts, "Get DString@Net Clinet, search starts");
		VIS_FREE(search_start_offsets, "Get DString@Net Clinet, search start offsets");
	}
	if(found)
	{
		if(inputlist[1]->company->type_id == BUILTIN_TYPE_LIST)
		{
			inputlist[2] = add_ref(list->entries[found_entry]);
			release_ref(inputlist[1]);
		}
		else
			inputlist[2] = inputlist[1];
		inputlist[3] = NULL;
	}
	else
	{
		release_ref(inputlist[1]);
		inputlist[3] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, worker_entry->instance->def->program);
		datum_set_yesno(inputlist[3], 0);
		inputlist[2] = NULL;
		release_ref(inputlist[0]);
		inputlist[0] = NULL;
	}
	//Does this need to be here still or was it just working around another bug?
	if(search_start_offset < 0)
		search_start_offset = 0;
	if(!found) {
		search_start = current;
		search_start_offset = i;
	}
	DEBUGPRINTF("Allocating string of length: %d = %d * %d + %d + 1\n", NET_SEARCH_BUFFER_SIZE * search_start->index + search_start_offset+1, NET_SEARCH_BUFFER_SIZE , search_start->index, search_start_offset);
	inputlist[1] = new_datum(BUILTIN_TYPE_STRING, 1, NET_SEARCH_BUFFER_SIZE * search_start->index + search_start_offset+1, worker_entry->instance->def->program);
	temp = first;
	string_offset = 0;
	while(temp)
	{
		DEBUGPRINTF("Copying from index %d to offset %X\n", temp->index, string_offset);
		if(temp == search_start)
		{
			//if(found)
			//{
				temp->buffer[search_start_offset] = '\0';
				memcpy(((char *)inputlist[1]->c.generic.data)+string_offset, temp->buffer, search_start_offset);
				string_offset += search_start_offset;
			/*}
			else
			{
				memcpy(((char *)inputlist[1]->c.generic.data)+string_offset, temp->buffer, i);
				string_offset += i;
			}*/
			break;
		}
		else
		{
			memcpy(((char *)inputlist[1]->c.generic.data)+string_offset, temp->buffer, NET_SEARCH_BUFFER_SIZE);
			string_offset += NET_SEARCH_BUFFER_SIZE;
		}
		if(temp != first)
		{
			temp2 = temp->next;
			VIS_FREE(temp, "Get DString@Net Client, buffer node");
			temp = temp2;
		}
		else
			temp = temp->next;
	}
	while(temp)
	{
		if(temp != first)
		{
			temp2 = temp->next;
			VIS_FREE(temp, "Get DString@Net Client, buffer node");
			temp = temp2;
		}
		else
			temp = temp->next;
	}
	((char *)inputlist[1]->c.generic.data)[string_offset] = '\0';
	DEBUGPRINTF("Retrieved: %s\ninputlist[0] = %X\n", inputlist[1]->c.generic.data, inputlist[0]);
	return 0;
}

int net_client_put_raw(datum ** params, queue_entry * entry)
{
	int sockfd = params[0]->c.integers.num_a;
	int sent;
	if(params[1]->union_type == 1 && params[1]->c.generic.len)
	{
		sent = send_all(sockfd, params[1]->c.generic.data, params[1]->c.generic.len);
		if(sent <= 0)
		{
			release_ref(params[0]);
			release_ref(params[1]);
			params[0] = NULL;
			params[1] = new_datum(BUILTIN_TYPE_WHOLE, 2, 0, entry->instance->def->program);
			params[1]->c.integers.num_a = 0-sent;
			return 0;
		}
	}
	release_ref(params[1]);
	params[1] = NULL;
	return 0;
}

int net_client_get_raw(datum ** params, queue_entry * entry)
{
	int sockfd = params[0]->c.integers.num_a;
	int got;
	params[1] = copy_datum(params[1], 0);
	if(params[1]->union_type == 1 && params[1]->c.generic.len)
	{
		got = recv_all(sockfd, params[1]->c.generic.data, params[1]->c.generic.len);
		if(got <= 0)
		{
			release_ref(params[0]);
			release_ref(params[1]);
			params[0] = params[1] = NULL;
			params[2] = new_datum(BUILTIN_TYPE_WHOLE, 2, 0, entry->instance->def->program);
			params[2]->c.integers.num_a = 0-got;
			return 0;
		}
	}
	params[2] = NULL;
	return 0;
}

typedef struct
{
	int sockfd;
	datum * callback;
	program * program;
} net_listen_data;

DWORD WINAPI listen_thread(net_listen_data * listen)
{
	worker_datum * work = listen->callback->c.generic.data;
	struct sockaddr_in client_addy;
	int addy_len;
	int newsock;
	int i;
	queue_entry entry;
	datum * params[32];
	BOOL netparam;
	worker_instance inst;
	entry.worker_num = 0;
	entry.instance = &inst;
	inst.def = listen->program->defs->deflist;//Use Main
	inst.caller_instance = NULL;
	inst.trans = NULL;
	inst.num_workers = inst.num_wires = 0;
	VIS_InitializeCriticalSection(inst.counter_lock);

	while(execute_active)
	{
		addy_len = sizeof(client_addy);
		newsock = accept(listen->sockfd, (struct sockaddr *)&client_addy, &addy_len);
		if(newsock != -1)
		{
			netparam = FALSE;
			for(i = 0; i < work->def->num_inputs; ++i)
				if(work->params[i])
					params[i] = add_ref(work->params[i]);
				else if(!netparam)
				{
					params[i] = new_datum(BUILTIN_TYPE_NETCLIENT, 2, 0, listen->program);
					params[i]->c.integers.num_a = newsock;
					netparam = TRUE;
				}
				else
					params[i] = NULL;
			//Make sure that our fake instance is never cleaned up
			inst.in_progress_count = inst.in_queue_count = 1000;
			execute_def(work->def, entry, params, NULL);
		}
	}
	release_ref(listen->callback);
	VIS_CloseSocket(listen->sockfd);
	VIS_FREE(listen, "Net listener object");
	return 0;
}

int vis_net_listenport(datum ** params, queue_entry * entry)
{
	int junk;
	struct sockaddr_in my_address;
	int port = params[0]->c.integers.num_a;
	net_listen_data * listener = malloc(sizeof(net_listen_data));
	release_ref(params[0]);
	
	DEBUGPUTS("calling socket\n");
	listener->callback = params[1];
	listener->sockfd = socket(PF_INET, SOCK_STREAM, 0);
	listener->program = entry->instance->def->program;
	if(listener->sockfd == -1)
	{
		release_ref(params[1]);
		VIS_FREE(listener, "net listener object");
		params[1] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, entry->instance->def->program);
		params[1]->c.integers.num_a = 0;
		params[0] = NULL;
		return 0;
	}
	DEBUGPRINTF("Socket: %X\n", listener->sockfd);
	
	my_address.sin_family = AF_INET;
	my_address.sin_port = htons(port);
	my_address.sin_addr.s_addr = INADDR_ANY;
	memset(&(my_address.sin_zero), '\0', 8);
	
	DEBUGPRINTF("Calling bind on port: %d\n", port);
	junk = bind(listener->sockfd, (struct sockaddr *)&my_address, sizeof(struct sockaddr));
	DEBUGPRINTF("Bind returned: %d\n", junk);
	if(junk == -1)
	{
		perror("bind");
		DEBUGPUTS("bind failed, releasing ref to callback worker\n");
		release_ref(params[1]);
		DEBUGPUTS("Closing socket\n");
		DEBUGPRINTF("Socket: %X\n", listener->sockfd);
		VIS_CloseSocket(listener->sockfd);
		DEBUGPUTS("Freeing listener data\n");
		VIS_FREE(listener, "net listener object");
		DEBUGPUTS("Allocating error output\n");
		params[1] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, entry->instance->def->program);
		params[1]->c.integers.num_a = 0;
		params[0] = NULL;
		return 0;
	}
	
	DEBUGPUTS("Calling listen\n");
	if(listen(listener->sockfd, 10) == -1)
	{
		release_ref(params[1]);
		VIS_CloseSocket(listener->sockfd);
		VIS_FREE(listener, "net listener object");
		params[1] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, entry->instance->def->program);
		params[1]->c.integers.num_a = 0;
		params[0] = NULL;
		return 0;
	}
	DEBUGPUTS("Creating new thread\n");
	VIS_NewThread(listen_thread, listener);
	params[0] = new_datum(BUILTIN_TYPE_YESNO, 2, 0, entry->instance->def->program);
	params[0]->c.integers.num_a = 0;
	params[1] = NULL;
	return 0;
}