//
// ZoneMinder File Camera Class Implementation, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>

#include "zm.h"
#include "zm_file_camera.h"

FileCamera::FileCamera(
    int p_id,
    const char *p_path,
    int p_width,
    int p_height,
    int p_colours,
    int p_brightness,
    int p_contrast,
    int p_hue,
    int p_colour,
    bool p_capture,
    bool p_record_audio)
  : Camera(
      p_id,
      FILE_SRC,
      p_width,
      p_height,
      p_colours,
      ZM_SUBPIX_ORDER_DEFAULT_FOR_COLOUR(p_colours),
      p_brightness,
      p_contrast,
      p_hue,
      p_colour,
      p_capture,
      p_record_audio)
{
  strncpy( path, p_path, sizeof(path)-1 );
  if ( capture ) {
    Initialise();
  }
}

FileCamera::~FileCamera() {
  if ( capture ) {
    Terminate();
  }
}

void FileCamera::Initialise() {
  if ( !path[0] ) {
    Fatal("No path specified for file image");
  }
}

void FileCamera::Terminate() {
}

int FileCamera::PreCapture() {
  struct stat statbuf;
  if ( stat(path, &statbuf) < 0 ) {
    Error("Can't stat %s: %s", path, strerror(errno));
    return -1;
  }
  bytes += statbuf.st_size;

  // This waits until 1 second has passed since it was modified. Effectively limiting fps to 60.
  // Which is kinda bogus. If we were writing to this jpg constantly faster than we are monitoring it here
  // we would never break out of this loop
  while ( (time(nullptr) - statbuf.st_mtime) < 1 ) {
    usleep(100000);
  }
  return 0;
}

int FileCamera::Capture(Image &image) {
  return image.ReadJpeg(path, colours, subpixelorder)?1:-1;
}

int FileCamera::PostCapture() {
  return 0;
}