# -*- coding: utf-8 -*-

from logging import Logger, LoggerAdapter
from typing import Any, Dict, MutableMapping, Optional, Tuple  # pylint: disable=W0611

from primordial.log.extra import LogExtra
from primordial.log.envelopedata import EnvelopeVersion, EnvelopeRole, EnvelopeDataSchema
from primordial.log.envelope import Envelope


class AnalyticsLogger(LoggerAdapter):
    """A LoggerAdapter which specifies an interface for log calls and adds default/initial log data into the record."""

    def __init__(
            self,
            logger: Logger,
            envelope_version: Optional[str] = None,
            data_schema: Optional[str] = None) -> None:
        self.extra = {}  # type: Dict[str, Any]
        super().__init__(logger, self.extra)

        #  Set up any defaults
        if envelope_version is None:
            self._envelope_version = EnvelopeVersion()
        else:
            self._envelope_version = EnvelopeVersion.fromString(envelope_version)

        if data_schema is None:
            self._data_schema = EnvelopeDataSchema()
        else:
            self._data_schema = EnvelopeDataSchema.fromString(data_schema)
        self.setExtraAttr(Envelope.ENVELOPE_VERSION_FIELD, str(self._envelope_version))
        self.setExtraAttr(Envelope.DATA_SCHEMA_FIELD, str(self._data_schema))
        self.role = EnvelopeRole()
        self.setExtraAttr(EnvelopeRole.ROLE_FIELD, str(self.role))
        self.validate_data_schema = False

    @property
    def performance(self) -> 'AnalyticsLogger':
        self._role(EnvelopeRole.ROLE_PERFORMANCE)
        return self

    @property
    def development(self) -> 'AnalyticsLogger':
        self._role(EnvelopeRole.ROLE_DEVELOPMENT)
        return self

    @property
    def business_analytics(self) -> 'AnalyticsLogger':
        self._role(EnvelopeRole.ROLE_BUSINESS_ANALYTICS)
        return self

    @property
    def validate(self) -> 'AnalyticsLogger':
        self.validate_data_schema = True
        return self

    def setExtraAttr(self, field: str, value: Any) -> None:
        self.extra[field] = value

    #  Calls to info() etc will call this method by default
    def process(self, msg: str, kwargs: MutableMapping[str, Any]) -> Tuple[str, MutableMapping[str, Any]]:
        if 'envelope_version' in kwargs:
            self.v(kwargs['envelope_version'])
        if 'data_schema' in kwargs:
            self.s(kwargs['data_schema'])
        if 'role' in kwargs:
            self._role(kwargs['role'])

        self._validate_schema()

        logextra = LogExtra.getLogExtra(**self.extra)
        logextra.set(**kwargs)
        new_kwargs = {}
        new_kwargs['extra'] = logextra.get()

        self._reset()

        return msg, new_kwargs

    def envelope_version(self, envelope_version: str) -> 'AnalyticsLogger':
        """Permanently set envelope_version for the lifetime of this logger."""
        self._envelope_version = EnvelopeVersion.fromString(envelope_version)
        self.setExtraAttr(Envelope.ENVELOPE_VERSION_FIELD, str(self._envelope_version))
        return self

    def data_schema(self, data_schema: str) -> 'AnalyticsLogger':
        """Permanently set data_schema for the lifetime of this logger."""
        self._data_schema = EnvelopeDataSchema.fromString(data_schema)
        self.setExtraAttr(Envelope.DATA_SCHEMA_FIELD, str(self._data_schema))
        return self

    def v(self, envelope_version: str) -> 'AnalyticsLogger':
        """Temporary override envelope_version for one logging call."""
        self.setExtraAttr(Envelope.ENVELOPE_VERSION_FIELD, envelope_version)
        return self

    def s(self, data_schema: str) -> 'AnalyticsLogger':
        """Temporary override data_schema for one logging call."""
        self.setExtraAttr(Envelope.DATA_SCHEMA_FIELD, data_schema)
        return self

    def _role(self, role: str) -> None:
        self.role = EnvelopeRole().set(EnvelopeRole.ROLE_FIELD, role)
        self.setExtraAttr(EnvelopeRole.ROLE_FIELD, str(self.role))

    # Implementers will need to override this class and function for data_schema validation
    def _validate_schema(self) -> bool:
        if self.validate_data_schema:  # pylint: disable=no-else-return
            data_schema = self.extra['data_schema']  # pylint: disable=unused-variable
            #  TODO - implement for envelope v2
            return True
        else:
            return True

    def _reset(self) -> None:
        self.role = EnvelopeRole()
        self.validate_data_schema = False
        self.extra = {}
        self.setExtraAttr(EnvelopeRole.ROLE_FIELD, str(self.role))
        self.setExtraAttr(Envelope.ENVELOPE_VERSION_FIELD, str(self._envelope_version))
        self.setExtraAttr(Envelope.DATA_SCHEMA_FIELD, str(self._data_schema))