/**
 * @file
 *
 *   Unless noted otherwise, the portions of Isis written by the USGS are public
 *   domain. See individual third-party library and package descriptions for 
 *   intellectual property information,user agreements, and related information.
 *
 *   Although Isis has been used by the USGS, no warranty, expressed or implied,
 *   is made by the USGS as to the accuracy and functioning of such software 
 *   and related material nor shall the fact of distribution constitute any such 
 *   warranty, and no responsibility is assumed by the USGS in connection 
 *   therewith.
 *
 *   For additional information, launch
 *   $ISISROOT/doc//documents/Disclaimers/Disclaimers.html in a browser or see 
 *   the Privacy &amp; Disclaimers page on the Isis website,
 *   http://isis.astrogeology.usgs.gov, and the USGS privacy and disclaimers on
 *   http://www.usgs.gov/privacy.html.
 */
#include <iomanip>
#include <iostream>

#include "Camera.h"
#include "CameraFactory.h"
#include "FileName.h"
#include "IException.h"
#include "Preference.h"
#include "Pvl.h"

using namespace std;
using namespace Isis;

void TestLineSamp(Camera *cam, double samp, double line);


int main(void) {
  Preference::Preferences(true);


  cout << "Unit Test for Chandrayaan1M3Camera..." << endl;
  try {
    // These should be lat/lon at center of image. To obtain these numbers for a new cube/camera,
    // set both the known lat and known lon to zero and copy the unit test output "Latitude off by: "
    // and "Longitude off by: " values directly into these variables. NOTE: These are only used
    // for the center of the image test, not the corners.
    double knownLat = 61.4944183507184832;
    double knownLon = 74.8961675572936798;

    Cube c("$chandrayaan1/testData/M3T20090630T083407_V03_RDN.cub", "r");
    Camera *cam = CameraFactory::Create(c);
    cout << "FileName: " << FileName(c.fileName()).name() << endl;
    cout << "CK Frame: " << cam->instrumentRotation()->Frame() << endl << endl;
    cout.setf(std::ios::fixed);
    cout << setprecision(9);

    // Test kernel IDs
    cout << "Kernel IDs: " << endl;
    cout << "CK Frame ID = " << cam->CkFrameId() << endl;
    cout << "CK Reference ID = " << cam->CkReferenceId() << endl;
    cout << "SPK Target ID = " << cam->SpkTargetId() << endl;
    cout << "SPK Reference ID = " << cam->SpkReferenceId() << endl << endl;
    
    // Test name methods
    cout << "Spacecraft Name Long: " << cam->spacecraftNameLong() << endl;
    cout << "Spacecraft Name Short: " << cam->spacecraftNameShort() << endl;
    cout << "Instrument Name Long: " << cam->instrumentNameLong() << endl;
    cout << "Instrument Name Short: " << cam->instrumentNameShort() << endl << endl;

    // Test all four corners to make sure the conversions are right
    cout << "For upper left corner ..." << endl;
    TestLineSamp(cam, 0.5, 0.5);

    cout << "For upper right corner ..." << endl;
    TestLineSamp(cam, 608.4999, 0.5);

    cout << "For lower left corner ..." << endl;
    TestLineSamp(cam, 0.5, 564.4999);

    cout << "For lower right corner ..." << endl;
    TestLineSamp(cam, 608.4999, 564.4999);

    double samp = 304.0;
    double line = 282.0;
    cout << "For center pixel position ..." << endl;

    if (!cam->SetImage(samp, line)) {
      cout << "ERROR" << endl;
      return 0;
    }

    if (abs(cam->UniversalLatitude() - knownLat) < 1E-10) {
      cout << "Latitude OK" << endl;
    }
    else {
      cout << setprecision(16) << "Latitude off by: " << cam->UniversalLatitude() - knownLat << endl;
    }

    if (abs(cam->UniversalLongitude() - knownLon) < 1E-10) {
      cout << "Longitude OK" << endl;
    }
    else {
      cout << setprecision(16) << "Longitude off by: " << cam->UniversalLongitude() - knownLon << endl;
    }

    cout << "RightAscension = " << cam->RightAscension() << endl;
    cout << "Declination = " << cam->Declination() << endl;     
    
    // Test a Level-2 image
    cout << endl << "Testing a Level-2 CH1 cube: " << endl << endl; 

    Cube c2("$chandrayaan1/testData/CH1_xBandLvl2.cub", "r");
    Camera *cam2 = CameraFactory::Create(c2);

    // Just test the center pixel to make sure the Camera still works on Level-2 
    // images
    
    cout << "For a central pixel position ..." << endl;
    samp = 2000; 
    line = 2500; 

    if (!cam2->SetImage(samp, line)) {
      cout << "ERROR" << endl;
      return 0;
    }
    else {
      cout << "SetImage succeeded." << endl; 
    }
  }
  catch (IException &e) {
    e.print();
  }
}


void TestLineSamp(Camera *cam, double samp, double line) {
  bool success = cam->SetImage(samp, line);

  if (success) {
    success = cam->SetUniversalGround(cam->UniversalLatitude(), cam->UniversalLongitude());
  }

  if (success) {
    double deltaSamp = samp - cam->Sample();
    double deltaLine = line - cam->Line();
    if (fabs(deltaSamp) < 1.0E-4) deltaSamp = 0;
    if (fabs(deltaLine) < 1.0E-4) deltaLine = 0;
    cout << "DeltaSample = " << deltaSamp << endl;
    cout << "DeltaLine = " << deltaLine << endl << endl;
  }
  else {
    cout << "DeltaSample = ERROR" << endl;
    cout << "DeltaLine = ERROR" << endl << endl;
  }
}

