# -*- coding: utf-8 -*-
import typing
from http import HTTPStatus

import bottle
import functools

# CHANGE
import marshmallow

from hapic.buffer import DecorationBuffer
from hapic.context import ContextInterface, BottleContext
from hapic.decorator import DecoratedController
from hapic.decorator import InputBodyControllerWrapper
from hapic.decorator import InputHeadersControllerWrapper
from hapic.decorator import InputPathControllerWrapper
from hapic.decorator import InputQueryControllerWrapper
from hapic.decorator import OutputBodyControllerWrapper
from hapic.decorator import OutputHeadersControllerWrapper
from hapic.description import InputBodyDescription
from hapic.description import InputFormsDescription
from hapic.description import InputHeadersDescription
from hapic.description import InputPathDescription
from hapic.description import InputQueryDescription
from hapic.description import OutputBodyDescription
from hapic.description import OutputHeadersDescription
from hapic.processor import ProcessorInterface, MarshmallowInputProcessor

flatten = lambda l: [item for sublist in l for item in sublist]

# TODO: Gérer les erreurs de schema
# TODO: Gérer les cas ou c'est une liste la réponse (items, item_nb)
# TODO: Confusion nommage body/json/forms

# _waiting = {}
# _endpoints = {}
# TODO NOW: C'est un gros gros fake !
class ErrorResponseSchema(marshmallow.Schema):
    error_message = marshmallow.fields.String(required=True)
    error_details = marshmallow.fields.Dict(required=True)

_default_global_context = BottleContext()
_default_global_error_schema = ErrorResponseSchema()


class Hapic(object):
    def __init__(self):
        self._buffer = DecorationBuffer()
        self._controllers = []

    def with_api_doc(self):
        def decorator(func):

            @functools.wraps(func)
            def wrapper(*args, **kwargs):
                return func(*args, **kwargs)

            description = self._buffer.get_description()
            decorated_controller = DecoratedController(
                reference=wrapper,
                description=description,
            )
            self._buffer.clear()
            self._controllers.append(decorated_controller)
            return wrapper

        return decorator

    def output_body(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = OutputBodyControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.output_body = OutputBodyDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def output_headers(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = OutputHeadersControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.output_headers = OutputHeadersDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def input_headers(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = InputHeadersControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.input_headers = InputHeadersDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def input_path(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = InputPathControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.input_path = InputPathDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def input_query(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = InputQueryControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.input_query = InputQueryDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def input_body(
        self,
        schema: typing.Any,
        processor: ProcessorInterface = None,
        context: ContextInterface = None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = InputBodyControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.input_body = InputBodyDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def input_forms(
        self,
        schema: typing.Any,
        processor: ProcessorInterface=None,
        context: ContextInterface=None,
        error_http_code: HTTPStatus = HTTPStatus.BAD_REQUEST,
        default_http_code: HTTPStatus = HTTPStatus.OK,
    ) -> typing.Callable[[typing.Callable[..., typing.Any]], typing.Any]:
        processor = processor or MarshmallowInputProcessor()
        processor.schema = schema
        context = context or _default_global_context

        decoration = InputBodyControllerWrapper(
            context=context,
            processor=processor,
            error_http_code=error_http_code,
            default_http_code=default_http_code,
        )

        def decorator(func):
            self._buffer.input_forms = InputFormsDescription(decoration)
            return decoration.get_wrapper(func)
        return decorator

    def generate_doc(self, app=None):
        # TODO @Damien bottle specific code !
        app = app or bottle.default_app()

        route_by_callbacks = []
        routes = flatten(app.router.dyna_routes.values())
        for path, path_regex, route, func_ in routes:
            route_by_callbacks.append(route.callback)

        for description in self._controllers:
            for path, path_regex, route, func_ in routes:
                if route.callback == description.reference:
                    # TODO: use description to feed apispec
                    print(route.method, path, description)
                    continue