Mini Shell

"""
This module contains validation schema for config file loaded values
"""

from schema import Schema, And, Optional, Use, SchemaError

from ..internal.exceptions import SSAError

cmdline_schema = Schema({
    'command': And(str, lambda c: c in ('set-config', 'get-config',
                                        'get-ssa-status', 'get-report',
                                        'enable-ssa', 'disable-ssa'),
                   error='Invalid command'),
    Optional('domains_number'): And(Use(lambda n: int(n)),
                                    lambda n: n >= 0,
                                    error='number of domains should be a positive integer'),
    Optional('urls_number'): And(Use(lambda n: int(n)),
                                 lambda n: n > 0,
                                 error='number of URLs should be a positive integer'),
    Optional('requests_duration'): And(Use(lambda n: float(n)),
                                       lambda n: n > 0.0,
                                       error='request duration should be positive'),
    Optional('request_number'): And(Use(lambda n: int(n)),
                                    lambda n: n > 0,
                                    error='number of requests should be a positive integer'),
    Optional('time'): And(Use(lambda n: int(n)),
                          lambda n: 0 <= n <= 12,
                          error='time should be a positive integer between 1 and 12, or 0'),
    Optional('correlation'): And(Use(lambda s: s.capitalize()), lambda s: s in ('On', 'Off'),
                                 error='bad correlation value, should be On or Off'),
    Optional('correlation_coefficient'): And(Use(lambda n: float(n)),
                                             lambda n: 0.0 < n <= 1.0,
                                             error='correlation coefficient could not be negative or greater than 1'),
    Optional('ignore_list'): Use(lambda s: str(s)),
    Optional('summary_notification_enabled'): And(
        Use(lambda s: s.capitalize()), lambda s: s in ('On', 'Off'),
        error='bad notification value, should be On or Off'),
})


def validate(data: dict) -> tuple:
    """
    Validate given data.
    Return:  tuple with 2 elements: command string and list of the validated options
    """
    try:
        d = cmdline_schema.validate(data)
        cmd = d['command']
        del d['command']
        return cmd, d
    except SchemaError as e:
        raise SSAError(f'Invalid configuration: {str(e)}')