/*
    HTTrack library example
    .c file

    Prerequisites:
      - install winhttrack
      - set the proper path in the project settings (especially for the httrack lib and dll)

    How to build: (callback.so or callback.dll)
      With GNU-GCC:
        gcc -I/usr/include/httrack -O -g3 -Wall -D_REENTRANT -o example example.c -lhttrack2
      With MS-Visual C++:
        cl -nologo -W3 -Zi -Zp4 -DWIN32 -Fe"mycallback.exe" callbacks-example.c wsock32.lib libhttrack.lib
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <windows.h>
#endif

/* Standard httrack module includes */
#include "httrack-library.h"
#include "htsopt.h"
#include "htsdefines.h"

/* Local definitions */
#include "example-main.h"

/*
 * Name:           main
 * Description:    main() function
 * Parameters:     None
 * Should return:  error status
*/
int main(void) {
  /* 
     First, ask for an URL 
     Note: For the test, option r2 (mirror max depth=1) and --testscan (no index, no cache, do not store, no log files)
   */
  char _argv[][256] = { "httrack_test", "<URL>", "-r3", "--testscan", "" };
  char *argv[] = { NULL, NULL, NULL, NULL, NULL };
  int argc = 0;
  httrackp *opt;
  int ret;

  while(strlen(_argv[argc])) {
    argv[argc] = _argv[argc];
    argc++;
  }
  argv[argc] = NULL;
  printf("HTTrackLib test program\n");
  printf("Enter URL (example: www.foobar.com/index.html) :");
  scanf("%s", argv[1]);
  printf("Test: 1 depth\n");

  /* Initialize the library */
#ifdef _WIN32
  {
    WORD wVersionRequested;     // requested version WinSock API
    WSADATA wsadata;            // Windows Sockets API data
    int stat;

    wVersionRequested = 0x0101;
    stat = WSAStartup(wVersionRequested, &wsadata);
    if (stat != 0) {
      printf("Winsock not found!\n");
      return;
    } else if (LOBYTE(wsadata.wVersion) != 1 && HIBYTE(wsadata.wVersion) != 1) {
      printf("WINSOCK.DLL does not support version 1.1\n");
      WSACleanup();
      return;
    }
  }
#endif
  hts_init();

  /* Create option settings and set callbacks (wrappers) */
  opt = hts_create_opt();

  CHAIN_FUNCTION(opt, init, httrack_wrapper_init, NULL);
  CHAIN_FUNCTION(opt, uninit, httrack_wrapper_uninit, NULL);
  CHAIN_FUNCTION(opt, start, httrack_wrapper_start, NULL);
  CHAIN_FUNCTION(opt, end, httrack_wrapper_end, NULL);
  CHAIN_FUNCTION(opt, chopt, httrack_wrapper_chopt, NULL);
  CHAIN_FUNCTION(opt, preprocess, httrack_wrapper_preprocesshtml, NULL);
  CHAIN_FUNCTION(opt, postprocess, httrack_wrapper_postprocesshtml, NULL);
  CHAIN_FUNCTION(opt, check_html, httrack_wrapper_checkhtml, NULL);
  CHAIN_FUNCTION(opt, query, httrack_wrapper_query, NULL);
  CHAIN_FUNCTION(opt, query2, httrack_wrapper_query2, NULL);
  CHAIN_FUNCTION(opt, query3, httrack_wrapper_query3, NULL);
  CHAIN_FUNCTION(opt, loop, httrack_wrapper_loop, NULL);
  CHAIN_FUNCTION(opt, check_link, httrack_wrapper_check, NULL);
  CHAIN_FUNCTION(opt, check_mime, httrack_wrapper_check_mime, NULL);
  CHAIN_FUNCTION(opt, pause, httrack_wrapper_pause, NULL);
  CHAIN_FUNCTION(opt, filesave, httrack_wrapper_filesave, NULL);
  CHAIN_FUNCTION(opt, filesave2, httrack_wrapper_filesave2, NULL);
  CHAIN_FUNCTION(opt, linkdetected, httrack_wrapper_linkdetected, NULL);
  CHAIN_FUNCTION(opt, linkdetected2, httrack_wrapper_linkdetected2, NULL);
  CHAIN_FUNCTION(opt, xfrstatus, httrack_wrapper_xfrstatus, NULL);
  CHAIN_FUNCTION(opt, savename, httrack_wrapper_savename, NULL);
  CHAIN_FUNCTION(opt, sendhead, httrack_wrapper_sendheader, NULL);
  CHAIN_FUNCTION(opt, receivehead, httrack_wrapper_receiveheader, NULL);

  /* Then, launch the mirror */
  ret = hts_main2(argc, argv, opt);

  /* Wait for a key */
  printf("\nPress ENTER key to exit\n");
  scanf("%s", argv[1]);

  /* Clear option state */
  hts_free_opt(opt);
  hts_uninit();
#ifdef _WIN32
  WSACleanup();
#endif

  /* That's all! */
  return 0;
}

/* CALLBACK FUNCTIONS */

/* Initialize the Winsock */
static void CDECL httrack_wrapper_init(t_hts_callbackarg * carg) {
  printf("Engine started\n");
}
static void CDECL httrack_wrapper_uninit(t_hts_callbackarg * carg) {
  printf("Engine exited\n");
}
static int CDECL httrack_wrapper_start(t_hts_callbackarg * carg, httrackp * opt) {
  printf("Start of mirror\n");
  return 1;
}
static int CDECL httrack_wrapper_chopt(t_hts_callbackarg * carg, httrackp * opt) {
  return 1;
}
static int CDECL httrack_wrapper_end(t_hts_callbackarg * carg, httrackp * opt) {
  printf("End of mirror\n");
  return 1;
}
static int CDECL httrack_wrapper_checkhtml(t_hts_callbackarg * carg,
                                           httrackp * opt, char *html, int len,
                                           const char *url_address,
                                           const char *url_file) {
  printf("Parsing html file: http://%s%s\n", url_address, url_file);
  return 1;
}
static int CDECL httrack_wrapper_loop(t_hts_callbackarg * carg, httrackp * opt,
                                      void *_back, int back_max, int back_index,
                                      int lien_n, int lien_tot, int stat_time,
                                      hts_stat_struct * stats) {
  /* printf("..httrack_wrapper_loop called\n"); */
  return 1;
}
static const char *CDECL httrack_wrapper_query(t_hts_callbackarg * carg,
                                               httrackp * opt,
                                               const char *question) {
  /* Answer is No */
  return "N";
}
static const char *CDECL httrack_wrapper_query2(t_hts_callbackarg * carg,
                                                httrackp * opt,
                                                const char *question) {
  /* Answer is No */
  return "N";
}
static const char *CDECL httrack_wrapper_query3(t_hts_callbackarg * carg,
                                                httrackp * opt,
                                                const char *question) {
  /* Answer is "" */
  return "";
}
static int CDECL httrack_wrapper_check(t_hts_callbackarg * carg, httrackp * opt,
                                       const char *adr, const char *fil,
                                       int status) {
  printf("Link status tested: http://%s%s\n", adr, fil);
  return -1;
}
static void CDECL httrack_wrapper_pause(t_hts_callbackarg * carg,
                                        httrackp * opt, const char *lockfile) {
  /* Wait until lockfile is removed.. */
}
static void CDECL httrack_wrapper_filesave(t_hts_callbackarg * carg,
                                           httrackp * opt, const char *file) {
}
static int CDECL httrack_wrapper_linkdetected(t_hts_callbackarg * carg,
                                              httrackp * opt, char *link) {
  printf("Link detected: %s\n", link);
  return 1;
}
static int CDECL httrack_wrapper_xfrstatus(t_hts_callbackarg * carg,
                                           httrackp * opt, void *back) {
  return 1;
}
static int CDECL httrack_wrapper_preprocesshtml(t_hts_callbackarg * carg,
                                                httrackp * opt, char **html,
                                                int *len,
                                                const char *url_address,
                                                const char *url_file) {
  return 1;
}
static int CDECL httrack_wrapper_postprocesshtml(t_hts_callbackarg * carg,
                                                 httrackp * opt, char **html,
                                                 int *len,
                                                 const char *url_address,
                                                 const char *url_file) {
  return 1;
}
static int CDECL httrack_wrapper_check_mime(t_hts_callbackarg * carg,
                                            httrackp * opt, const char *adr,
                                            const char *fil, const char *mime,
                                            int status) {
  return -1;
}
static void CDECL httrack_wrapper_filesave2(t_hts_callbackarg * carg,
                                            httrackp * opt, const char *adr,
                                            const char *fil, const char *save,
                                            int is_new, int is_modified,
                                            int not_updated) {
}
static int CDECL httrack_wrapper_linkdetected2(t_hts_callbackarg * carg,
                                               httrackp * opt, char *link,
                                               const char *start_tag) {
  return 1;
}
static int CDECL httrack_wrapper_savename(t_hts_callbackarg * carg,
                                          httrackp * opt,
                                          const char *adr_complete,
                                          const char *fil_complete,
                                          const char *referer_adr,
                                          const char *referer_fil, char *save) {
  return 1;
}
static int CDECL httrack_wrapper_sendheader(t_hts_callbackarg * carg,
                                            httrackp * opt, char *buff,
                                            const char *adr, const char *fil,
                                            const char *referer_adr,
                                            const char *referer_fil,
                                            htsblk * outgoing) {
  return 1;
}
static int CDECL httrack_wrapper_receiveheader(t_hts_callbackarg * carg,
                                               httrackp * opt, char *buff,
                                               const char *adr, const char *fil,
                                               const char *referer_adr,
                                               const char *referer_fil,
                                               htsblk * incoming) {
  return 1;
}