from sklearn.externals import joblib

import numpy as np

from ipfml import processing, utils
from PIL import Image

import sys, os, argparse, json

from keras.models import model_from_json

from modules.utils import config as cfg
from modules.utils import data as dt

path                  = cfg.dataset_path
min_max_ext           = cfg.min_max_filename_extension
metric_choices        = cfg.metric_choices_labels
normalization_choices = cfg.normalization_choices

custom_min_max_folder = cfg.min_max_custom_folder

def main():

    # getting all params
    parser = argparse.ArgumentParser(description="Script which detects if an image is noisy or not using specific model")

    parser.add_argument('--image', type=str, help='Image path')
    parser.add_argument('--interval', type=str, help='Interval value to keep from svd', default='"0, 200"')
    parser.add_argument('--model', type=str, help='.joblib or .json file (sklearn or keras model)')
    parser.add_argument('--mode', type=str, help='Kind of normalization level wished', choices=normalization_choices)
    parser.add_argument('--metric', type=str, help='Metric data choice', choices=metric_choices)
    parser.add_argument('--custom', type=str, help='Name of custom min max file if use of renormalization of data', default=False)

    args = parser.parse_args()

    p_img_file   = args.image
    p_model_file = args.model
    p_interval   = list(map(int, args.interval.split(',')))
    p_mode       = args.mode
    p_metric     = args.metric
    p_custom     = args.custom

    if '.joblib' in p_model_file:
        kind_model = 'sklearn'

    if '.json' in p_model_file:
        kind_model = 'keras'

    if 'corr' in p_model_file:
        corr_model = True

        indices_corr_path = os.path.join(cfg.correlation_indices_folder, p_model_file.split('/')[1].replace('.json', '').replace('.joblib', '') + '.csv')

        with open(indices_corr_path, 'r') as f:
            data_corr_indices = [int(x) for x in f.readline().split(';') if x != '']
    else:
        corr_model = False


    if kind_model == 'sklearn':
        # load of model file
        model = joblib.load(p_model_file)

    if kind_model == 'keras':
        with open(p_model_file, 'r') as f:
            json_model = json.load(f)
            model = model_from_json(json_model)
            model.load_weights(p_model_file.replace('.json', '.h5'))

            model.compile(loss='binary_crossentropy',
                        optimizer='adam',
                        metrics=['accuracy'])

    # load image
    img = Image.open(p_img_file)

    data = dt.get_svd_data(p_metric, img)

    # get interval values
    begin, end = p_interval

    # check if custom min max file is used
    if p_custom:

        if corr_model:
            test_data = data[data_corr_indices]
        else:
            test_data = data[begin:end]

        if p_mode == 'svdne':

            # set min_max_filename if custom use
            min_max_file_path = custom_min_max_folder + '/' +  p_custom

            # need to read min_max_file
            file_path = os.path.join(os.path.dirname(__file__), min_max_file_path)
            with open(file_path, 'r') as f:
                min_val = float(f.readline().replace('\n', ''))
                max_val = float(f.readline().replace('\n', ''))

            test_data = utils.normalize_arr_with_range(test_data, min_val, max_val)

        if p_mode == 'svdn':
            test_data = utils.normalize_arr(test_data)

    else:

        # check mode to normalize data
        if p_mode == 'svdne':

            # set min_max_filename if custom use
            min_max_file_path = path + '/' + p_metric + min_max_ext

            # need to read min_max_file
            file_path = os.path.join(os.path.dirname(__file__), min_max_file_path)
            with open(file_path, 'r') as f:
                min_val = float(f.readline().replace('\n', ''))
                max_val = float(f.readline().replace('\n', ''))

            l_values = utils.normalize_arr_with_range(data, min_val, max_val)

        elif p_mode == 'svdn':
            l_values = utils.normalize_arr(data)
        else:
            l_values = data

        if corr_model:
            test_data = data[data_corr_indices]
        else:
            test_data = data[begin:end]


    # get prediction of model
    if kind_model == 'sklearn':
        prediction = model.predict([test_data])[0]

    if kind_model == 'keras':
        test_data = np.asarray(test_data).reshape(1, len(test_data), 1)
        prediction = model.predict_classes([test_data])[0][0]

    # output expected from others scripts
    print(prediction)

if __name__== "__main__":
    main()