var BOB_mod_gm      = require('gm').subClass({ imageMagick: true });
// var BOB_mod_gphoto2 = require('gphoto2');
// var BOB_var_gphoto  = new BOB_mod_gphoto2.GPhoto2();
var BOB_mod_fs      = require('fs');
var BOB_mod_path    = require('path');
var BOB_mod_mkdirp  = require('mkdirp');

var BOB_mod_exec    = require('child_process').exec;

var BOB_cfg_config  = null;

var BOB_var_camera  = null;

var BOB_module = {};

var BOB_tmpPict = "/home/odroid/bobine-tmp.jpg"

BOB_upCameraReference(function() {});

function BOB_takePicture(pCallback) {
  BOB_mod_exec("gphoto2 --capture-image-and-download --filename="+BOB_tmpPict+" --force-overwrite", function(pErr, pStdout, pStderr) {
    console.log("takePicture", pErr || pStdout || pStderr)
    console.log(pErr, pStdout, pStderr)
    return pCallback(pErr)
  })
}

function BOB_upCameraReference(pCallback) {
  // List cameras / assign list item to variable to use below options 
  //if( BOB_var_camera === null ) {
   // BOB_var_gphoto.list(function (list) {
    //  if (list.length === 0) {
  //      return pCallback();
  //    } else {
  //      console.log(list)
  //      BOB_var_camera = list[0];
  //      console.log(BOB_var_camera.model);
  //     return pCallback();
  //    }
  //  })
  //} else {
    return pCallback();
  //}
}

BOB_module.getConfig = function(pCallback) {
  BOB_var_camera.getConfig(pCallback);
}

BOB_module.takePicture = function(pBoothId, pPictId, pCallback) {
  var destPath = BOB_mod_path.join(BOB_cfg_config.paths.original, pBoothId);
  var pbltPath = BOB_mod_path.join(BOB_cfg_config.paths.prebuilt, pBoothId);
  var pictOrig = BOB_mod_path.join(destPath, BOB_cfg_config.pictNames[pPictId]);
  var pictPblt = BOB_mod_path.join(destPath, BOB_cfg_config.pictNames[pPictId]);

  BOB_mod_mkdirp.sync(BOB_mod_path.join(BOB_cfg_config.paths.prebuilt, pBoothId));

  console.log("new")

  BOB_takePicture(function (pErr) {
    // If error occurs
    if( pErr ) {
      return pCallback(pErr)
    // Else write file on ddisk
    } else {
      BOB_mod_mkdirp(destPath, function() {
        copyFile(BOB_tmpPict, pictOrig, function(pErr) {
          return pCallback(pErr, pictOrig)
        });
      })
    }
  });
}


function copyFile(source, target, cb) {
  var cbCalled = false;

  var rd = BOB_mod_fs.createReadStream(source);
  rd.on("error", function(err) {
    done(err);
  });
  var wr = BOB_mod_fs.createWriteStream(target);
  wr.on("error", function(err) {
    done(err);
  });
  wr.on("close", function(ex) {
    done();
  });
  rd.pipe(wr);

  function done(err) {
    if (!cbCalled) {
      cb(err);
      cbCalled = true;
    }
  }
}

BOB_module.takePictureNpm = function(pBoothId, pPictId, pCallback) {
  var destPath = BOB_mod_path.join(BOB_cfg_config.paths.original, pBoothId);
  var pbltPath = BOB_mod_path.join(BOB_cfg_config.paths.prebuilt, pBoothId);
  var pictOrig = BOB_mod_path.join(destPath, BOB_cfg_config.pictNames[pPictId]);
  var pictPblt = BOB_mod_path.join(destPath, BOB_cfg_config.pictNames[pPictId]);

console.log("1");
  BOB_mod_mkdirp.sync(BOB_mod_path.join(BOB_cfg_config.paths.prebuilt, pBoothId));
console.log("2");

  BOB_upCameraReference(function() {
console.log("3");

    if( BOB_var_camera === null ) {
      return pCallback("No camera found");
    } else {
console.log("4");

      BOB_var_camera.takePicture({download: true}, function (pErr, pData) {
        // If error occurs
        if( pErr ) {
          return pCallback(pErr)
        // Else write file on ddisk
        } else {
console.log("5");

          BOB_mod_mkdirp(destPath, function() {
console.log("6");

            BOB_mod_fs.writeFile(pictOrig, pData, function(pErr) {
console.log("7");

              // BOB_mod_gm(pictOrig)
              //   .autoOrient()
              //   .gravity('Center')
              //   // .resize(BOB_cfg_config.cropSize.width, BOB_cfg_config.cropSize.height, "^")
              //   // .crop(BOB_cfg_config.cropSize.width, BOB_cfg_config.cropSize.height)
              //   // .modulate(100, 0)
              //   // .contrast(+2)
              //   .write(pictOrig, function(pErr) {
              //     return pCallback(pErr, pictPblt)
              //   })
              return pCallback(pErr, pictOrig)
            });
          })
        }
      });
    }
  })
}

module.exports = function(pConfig) {
  BOB_cfg_config = pConfig;
  return  BOB_module;
}