# Parameters can be overwritten on the command line
# for example: cntk configFile=myConfigFile RootDir=../.. 
# For running from Visual Studio add
# currentDirectory=$(SolutionDir)/<path to corresponding data folder> 

command = trainNetwork:testNetwork

precision = "float"; traceLevel = 1 ; deviceId = "auto"

rootDir = ".." ; dataDir = "$rootDir$/DataSets/MNIST" ;
outputDir = "./Output" ;

modelPath = "$outputDir$/Models/05_OneConvRegr"
#stderr = "$outputDir$/05_OneConvRegr_bs_out"

# TRAINING CONFIG
trainNetwork = {
    action = "train"
    
    BrainScriptNetworkBuilder = {
        imageShape = 28:28:1                        # image dimensions, 1 channel only
        labelDim = 10                               # number of distinct labels
        featScale = 1/256
        Scale{f} = x => Constant(f) .* x
        
        model = Sequential (
            Scale {featScale} :
            ConvolutionalLayer {16, (5:5), pad = true} : ReLU : 
            MaxPoolingLayer    {(2:2), stride=(2:2)} :
            DenseLayer {64} : ReLU : 
            LinearLayer {labelDim}
        )
        
        # inputs
        features = Input {imageShape}
        labels = Input {labelDim}

        # apply model to features
        z = model (features)

        # loss and error computation
        diff = labels - z
        sqerr = ReduceSum (diff.*diff, axis=1)
        rmse =  Sqrt (sqerr / labelDim)

        # declare special nodes
        featureNodes    = (features)
        labelNodes      = (labels)
        criterionNodes  = (rmse)
        evaluationNodes = (rmse)
        outputNodes     = (z)
    }

    SGD = {
        epochSize = 0
        minibatchSize = 64
        maxEpochs = 15
        learningRatesPerSample = 0.001*5:0.0005
        momentumAsTimeConstant = 1024
        numMBsToShowResult = 500
    }

    reader = {
        readerType = "CNTKTextFormatReader"
        # See ../README.md for details on getting the data (Train-28x28_cntk_text.txt).
        file = "$DataDir$/Train-28x28_cntk_text.txt"
        input = {
            features   = { dim = 784 ; format = "dense" }
            labels =   { dim = 10  ; format = "dense" }
        }
    }   
}

# TEST CONFIG
testNetwork = {
    action = "test"
    minibatchSize = 1024    # reduce this if you run out of memory

    reader = {
        readerType = "CNTKTextFormatReader"
        file = "$DataDir$/Test-28x28_cntk_text.txt"
        input = {
            features = { dim = 784 ; format = "dense" }
            labels =   { dim = 10  ; format = "dense" }
        }
    }
}