/*
   Copyright (C) 2003 Commonwealth Scientific and Industrial Research
   Organisation (CSIRO) Australia

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   - Neither the name of CSIRO Australia nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
 * plugin_cmml.c
 * 
 * Shane Stephens <shane.stephens@annodex.net>
 *
 * oggplay_* functions in this file dodgily copied from oggplay_tcp_reader.c
 * because poor widdle windows can't handle even mildy complicated cases of
 * #include dependencies.  Honestly, I wonder if that child will ever grow
 * up normal.
 */


#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <oggplay/oggplay.h>

#ifdef WIN32

#include <process.h>
#include <io.h>
#include <winsock2.h>

#define snprintf _snprintf

#else
#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/fcntl.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <time.h>
#include <netdb.h>
#include <unistd.h>
#include <pthread.h>
#endif

#include <assert.h>

#include "plugin_cmml.h"

#define PRINT_BUFFER(s,m) \
    printf("%s: in_mem: %d size: %d pos: %d stored: %d\n", \
            s, m->amount_in_memory, m->buffer_size, \
            m->current_position, m->stored_offset);

#ifndef WIN32
typedef int SOCKET;
#define INVALID_SOCKET  -1
#endif

#define START_TIMEOUT(ref) \
  (ref) = oggplay_sys_time_in_ms()

#ifdef WIN32 
#define CHECK_ERROR(error) \
  (WSAGetLastError() == WSA##error)
#else
#define CHECK_ERROR(error) \
  (errno == error)
#endif

#define RETURN_ON_TIMEOUT_OR_CONTINUE(ref)        \
  if (oggplay_sys_time_in_ms() - (ref) > 500) {   \
    return E_OGGPLAY_TIMEOUT;                     \
  } else {                                        \
    oggplay_millisleep(10);                       \
    continue;                                     \
  }

static SOCKET
oggplay_create_socket() {
  SOCKET sock;

#ifdef WIN32	
  WORD                  wVersionRequested;
  WSADATA               wsaData;
#ifdef HAVE_WINSOCK2        
  wVersionRequested = MAKEWORD(2,2);
#else
  wVersionRequested = MAKEWORD(1,1);
#endif    
  if (WSAStartup(wVersionRequested, &wsaData) == -1) {
    printf("Socket open error\n");
    return INVALID_SOCKET;
  }
  if (wsaData.wVersion != wVersionRequested) {
    printf("Incorrect winsock version [%d]\n", wVersionRequested);
    WSACleanup();
    return INVALID_SOCKET;
  }
#endif

  sock = socket(PF_INET, SOCK_STREAM, 0);
  if (sock == INVALID_SOCKET) {
    printf("Could not create socket\n");
#ifdef WIN32
    WSACleanup();
#endif
    return INVALID_SOCKET;
  }

  return sock;
}

/*
 * this function guarantees it will return malloced versions of host and 
 * path
 */
static void
oggplay_hostname_and_path(char *location, char *proxy, int proxy_port,
                                  char **host, int *port, char **path) {


  char  * colon;
  char  * slash;
  char  * end_of_host;

  /* if we have a proxy installed this is all dead simple */
  if (proxy != NULL) {
    *host = strdup(proxy);
    *port = proxy_port;
    *path = strdup(location);
    return;
  }

  /* find start_pos */
  if (strncmp(location, "http://", 7) == 0) {
    location += 7;
  }

  colon = strchr(location, ':');
  slash = strchr(location, '/');

  /*
   * if both are null, then just set the simple defaults and return
   */
  if (colon == NULL && slash == NULL) {
    *host = strdup(location);
    *port = 80;
    *path = strdup("/");
    return;
  }

  /* 
   * if there's a slash and it's before colon, there's no port.  Hence, after
   * this code, the only time that there's a port is when colon is non-NULL
   */
  if (slash != NULL && colon > slash) {
    colon = NULL;
  }

  /*
   * we might as well extract the port now.  We can also work out where
   * the end of the hostname is, as it's either the colon (if there's a port)
   * or the slash (if there's no port)
   */
  if (colon != NULL) {
    *port = (int)strtol(colon+1, NULL, 10);
    end_of_host = colon;
  } else {
    *port = 80;
    end_of_host = slash;
  }

  *host = strdup(location);
  (*host)[end_of_host - location] = '\0';

  if (slash == NULL) {
    *path = strdup("/");
    return;
  }

  *path = strdup(slash);

}

static OggPlayErrorCode
oggplay_connect_to_host(SOCKET socket, struct sockaddr *addr) {

  ogg_int64_t           time_ref;

  START_TIMEOUT(time_ref);

  while (connect(socket, addr, sizeof(struct sockaddr_in)) < 0) {
    if (
        CHECK_ERROR(EINPROGRESS) || CHECK_ERROR(EALREADY)
#ifdef WIN32
          /* see http://msdn2.microsoft.com/en-us/library/ms737625.aspx */
        || CHECK_ERROR(EWOULDBLOCK) || CHECK_ERROR(EINVAL)
#endif      
    ) {
      RETURN_ON_TIMEOUT_OR_CONTINUE(time_ref);
    } 
    else if CHECK_ERROR(EISCONN) 
    {
      break;
    }
    printf("Could not connect to host; error code is %d\n", errno);
    return CHECK_ERROR(ETIMEDOUT) ? E_OGGPLAY_TIMEOUT : 
                                              E_OGGPLAY_SOCKET_ERROR;
  }

  return E_OGGPLAY_OK;

}

static char *
get_all_cmml(char *location, char *proxy, int proxy_port) {

  char              * host;
  char              * path;
  int                 port;
  char                http_request_header[1024];
  SOCKET              socket                = oggplay_create_socket();
  struct sockaddr_in  addr;
  struct hostent    * he;
  int                 r;
  char              * buffer                = NULL;
  int                 n_chunks              = 0;
  int                 bytes_read            = 0;
  
  if (socket == INVALID_SOCKET) return NULL;

  oggplay_hostname_and_path(location, proxy, proxy_port, &host, &port, &path);

  snprintf(http_request_header, 1024,
      "GET %s HTTP/1.0\n"
      "Host: %s\n"
      "User-Agent: AnnodexFirefoxPlugin/0.1\n"
      "Accept: text/x-cmml\n"
      "Connection: Keep-Alive\n\n", path, host);

  he = gethostbyname(host);

  free(host);
  free(path);

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

  memcpy(&addr.sin_addr.s_addr, he->h_addr, he->h_length);
  addr.sin_family = AF_INET;
  addr.sin_port = htons(port);

  r = oggplay_connect_to_host(socket, (struct sockaddr *)&addr);
  if (r != E_OGGPLAY_OK) return NULL;

#ifdef WIN32
  r = send(socket, http_request_header, strlen(http_request_header), 0);
#else
  r = write(socket, http_request_header, strlen(http_request_header));
#endif

  if (r < 0) return NULL;

#define CHUNK_SIZE    16394

  while (1) {

    n_chunks ++;
    buffer = realloc(buffer, CHUNK_SIZE * n_chunks);

#ifdef WIN32
    r = recv(socket, buffer + bytes_read, CHUNK_SIZE, 0);
#else
    r = read(socket, buffer + bytes_read, CHUNK_SIZE);
#endif

    if (r < 0) {
      free(buffer);
#ifdef WIN32
      closesocket(socket);
#else
      close(socket);
#endif
      return NULL;
    }

    if (r == 0) {
      buffer[bytes_read] = '\0';
#ifdef WIN32
      closesocket(socket);
#else
      close(socket);
#endif
      return buffer;
    }

    bytes_read += r;
  }

}

typedef struct {
  char              * file;
  char              * proxy;
  int                 proxyPort;
  nsPluginInstance  * plugin;
} CmmlThreadInfo;

static void *
cmml_thread(void *handle) {

  CmmlThreadInfo  * info = (CmmlThreadInfo *)handle;
  char            * cmml;

  cmml = get_all_cmml(info->file, info->proxy, info->proxyPort);
  if (cmml == NULL) {
    return NULL;
  }

  onCMMLData(info->plugin, &cmml, 1, 1);
  return NULL;

}

void
start_cmml_thread(nsPluginInstance *i, const char *movie, char *proxy, 
                                                            int proxyPort) {

  CmmlThreadInfo  * info;
  //char            * mdot  = strrchr(movie, '.');
  char            * fname;// = malloc(mdot - movie + 6);
#ifdef WIN32
  HANDLE            thread;
  int               tid;
#else   
  pthread_t         thread;
#endif
  
  fname = strdup(movie);

  info = malloc(sizeof(CmmlThreadInfo));
  info->file      = fname;
  info->proxy     = proxy;
  info->proxyPort = proxyPort;
  info->plugin    = i;

#ifdef WIN32
  thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)cmml_thread, 
    (LPVOID)info, 0, &tid);
#else
  pthread_create(&thread, NULL, cmml_thread, (void *)info);
#endif

}