import glob

import yaml

from cerberus import Validator


def validate_schema(params):
    # config_files = glob.glob('**/config.yaml', recursive=True)
    # fname = config_files[0]

    # with open(fname) as stream:
    #     params = yaml.load(stream, Loader=yaml.FullLoader)

    # print(params)

    schema = {
        'daq': {
            'type': 'dict',
            'schema': {
                'n_channels_max': {'required': True, 'type': 'integer', 'min': 1, 'max': 128},
                'daq_sleep': {'required': True, 'type': 'float', 'min': 0, 'max': 1.},
                'fs': {'required': True, 'type': 'float', 'min': 1., 'max': 30000.},
                'smpl_fct': {'required': True, 'type': 'integer', 'min': 1, 'max': 30000},
                        }
                    },
        'speller': {
            'type': 'dict',
            'schema': {
                'type': {'required': True, 'type': 'string', 'allowed': ['question', 'exploration', 'training_color', 'color', 'feedback']}
                      }
                    },
        'recording': {
            'type': 'dict',
            'schema': {
                'timing': {
                    'type': 'dict',
                    'schema': {
                        't_baseline_1': {'required': True, 'type': 'float', 'min': 0., 'max': 600.},
                        't_baseline_all': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        't_baseline_rand': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        't_after_stimulus': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        't_response': {'required': True, 'type': 'float', 'min': 0., 'max': 60.},
                        'decoder_refresh_interval': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        'bci_loop_interval': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        'recording_loop_interval': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                        'recording_loop_interval_data': {'required': True, 'type': 'float', 'min': 0., 'max': 10.},
                              }
                            }
                        }
                    }
            }

    # print(schema)

    v = Validator()
    v.schema = schema
    v.allow_unknown = True

    validation_passed = v.validate(params, schema)
    errors = v.errors

    # print("Validation validation_passed: {}".format(validation_passed))
    # print("Errors: {}".format(errors))

    return validation_passed, errors


if __name__ == '__main__':
    config_files = glob.glob('**/config.yaml', recursive=True)
    fname = config_files[0]
    validation_passed, errors = validate_schema(fname)
    # print(validation_passed)
    if validation_passed is True:
        print("Config file validation success! All values are as expected.")
    else:
        print("Config file validation failed with the following errors:")

        for key, value in errors.items():
            print("\nerror in {}: {}".format(key, errors[key]))