from datetime import datetime
from datetime import timedelta
from ipaddress import IPv4Address


def is_valid_date(v, **kwargs):
    try:
        date = datetime(int(v[:4]),
                        int(v[5:7]),
                        int(v[8:10]),
                        int(v[11:13]),
                        int(v[14:16]),
                        int(v[17:])
                        )
        zone_offset = kwargs.get('#zone_offset', 8)
        return (date - timedelta(hours=zone_offset)).strftime("%Y-%m-%d %H:%M:%S")
    except:
        return None


def is_valid_int(v, **kwargs):
    try:
        return int(v)
    except:
        return None


def is_valid_srt(v, **kwargs):
    try:
        return str(v)
    except:
        return None


def is_valid_float(v, **kwargs):
    try:
        return float(v)
    except:
        return None


def is_valid_bool(v, **kwargs):
    try:
        return bool(v)
    except:
        return None


def is_valid_array(v, **kwargs):
    try:
        return [str(i) for i in v]
    except:
        return None


def is_valid_ipv4(v, **kwargs):
    try:
        return str(IPv4Address(v))
    except:
        return None


TYPE_CK2PY = {
    "DateTime('UTC')": is_valid_date,
    "Nullable(DateTime('UTC'))": is_valid_date,
    "DateTime()": is_valid_date,

    "Nullable(IPv4)": is_valid_ipv4,
    "IPv4": is_valid_ipv4,

    "String": is_valid_srt,
    "Nullable(String)": is_valid_srt,

    "Nullable(UInt8)": is_valid_int,
    "UInt8": is_valid_srt,

    "Nullable(Int8)": is_valid_int,
    "Int8": is_valid_srt,

    "Nullable(UInt16)": is_valid_int,
    "UInt16": is_valid_srt,

    "Nullable(Int16)": is_valid_int,
    "Int16": is_valid_srt,

    "Nullable(UInt32)": is_valid_int,
    "UInt32": is_valid_srt,

    "Nullable(UInt64)": is_valid_int,
    "UInt64": is_valid_srt,

    "Nullable(Int64)": is_valid_int,
    "Int64": is_valid_srt,

    "Array(String)": is_valid_array,

    "Nullable(Float)": is_valid_float,
    "Float": is_valid_float,

}