import asyncio
import logging
import socket
import sys
from argparse import ArgumentParser
from collections.abc import Iterable
from importlib import import_module
from typing import Any, Awaitable, Callable, List, Optional, Type, Union, cast

from .abc import AbstractAccessLogger
from .helpers import all_tasks
from .log import access_logger
from .web_app import Application, CleanupError
from .web_exceptions import (
    HTTPAccepted,
    HTTPBadGateway,
    HTTPBadRequest,
    HTTPClientError,
    HTTPConflict,
    HTTPCreated,
    HTTPError,
    HTTPException,
    HTTPExpectationFailed,
    HTTPFailedDependency,
    HTTPForbidden,
    HTTPFound,
    HTTPGatewayTimeout,
    HTTPGone,
    HTTPInsufficientStorage,
    HTTPInternalServerError,
    HTTPLengthRequired,
    HTTPMethodNotAllowed,
    HTTPMisdirectedRequest,
    HTTPMovedPermanently,
    HTTPMultipleChoices,
    HTTPNetworkAuthenticationRequired,
    HTTPNoContent,
    HTTPNonAuthoritativeInformation,
    HTTPNotAcceptable,
    HTTPNotExtended,
    HTTPNotFound,
    HTTPNotImplemented,
    HTTPNotModified,
    HTTPOk,
    HTTPPartialContent,
    HTTPPaymentRequired,
    HTTPPermanentRedirect,
    HTTPPreconditionFailed,
    HTTPPreconditionRequired,
    HTTPProxyAuthenticationRequired,
    HTTPRedirection,
    HTTPRequestEntityTooLarge,
    HTTPRequestHeaderFieldsTooLarge,
    HTTPRequestRangeNotSatisfiable,
    HTTPRequestTimeout,
    HTTPRequestURITooLong,
    HTTPResetContent,
    HTTPSeeOther,
    HTTPServerError,
    HTTPServiceUnavailable,
    HTTPSuccessful,
    HTTPTemporaryRedirect,
    HTTPTooManyRequests,
    HTTPUnauthorized,
    HTTPUnavailableForLegalReasons,
    HTTPUnprocessableEntity,
    HTTPUnsupportedMediaType,
    HTTPUpgradeRequired,
    HTTPUseProxy,
    HTTPVariantAlsoNegotiates,
    HTTPVersionNotSupported,
)
from .web_fileresponse import FileResponse
from .web_log import AccessLogger
from .web_middlewares import middleware, normalize_path_middleware
from .web_protocol import (
    PayloadAccessError,
    RequestHandler,
    RequestPayloadError,
)
from .web_request import BaseRequest, FileField, Request
from .web_response import (
    ContentCoding,
    Response,
    StreamResponse,
    json_response,
)
from .web_routedef import (
    AbstractRouteDef,
    RouteDef,
    RouteTableDef,
    StaticDef,
    delete,
    get,
    head,
    options,
    patch,
    post,
    put,
    route,
    static,
    view,
)
from .web_runner import (
    AppRunner,
    BaseRunner,
    BaseSite,
    GracefulExit,
    ServerRunner,
    SockSite,
    TCPSite,
    UnixSite,
)
from .web_server import Server
from .web_urldispatcher import (
    AbstractResource,
    AbstractRoute,
    DynamicResource,
    PlainResource,
    Resource,
    ResourceRoute,
    StaticResource,
    UrlDispatcher,
    UrlMappingMatchInfo,
    View,
)
from .web_ws import WebSocketReady, WebSocketResponse, WSMsgType

__all__ = (
    # web_app
    'Application',
    'CleanupError',
    # web_exceptions
    'HTTPAccepted',
    'HTTPBadGateway',
    'HTTPBadRequest',
    'HTTPClientError',
    'HTTPConflict',
    'HTTPCreated',
    'HTTPError',
    'HTTPException',
    'HTTPExpectationFailed',
    'HTTPFailedDependency',
    'HTTPForbidden',
    'HTTPFound',
    'HTTPGatewayTimeout',
    'HTTPGone',
    'HTTPInsufficientStorage',
    'HTTPInternalServerError',
    'HTTPLengthRequired',
    'HTTPMethodNotAllowed',
    'HTTPMisdirectedRequest',
    'HTTPMovedPermanently',
    'HTTPMultipleChoices',
    'HTTPNetworkAuthenticationRequired',
    'HTTPNoContent',
    'HTTPNonAuthoritativeInformation',
    'HTTPNotAcceptable',
    'HTTPNotExtended',
    'HTTPNotFound',
    'HTTPNotImplemented',
    'HTTPNotModified',
    'HTTPOk',
    'HTTPPartialContent',
    'HTTPPaymentRequired',
    'HTTPPermanentRedirect',
    'HTTPPreconditionFailed',
    'HTTPPreconditionRequired',
    'HTTPProxyAuthenticationRequired',
    'HTTPRedirection',
    'HTTPRequestEntityTooLarge',
    'HTTPRequestHeaderFieldsTooLarge',
    'HTTPRequestRangeNotSatisfiable',
    'HTTPRequestTimeout',
    'HTTPRequestURITooLong',
    'HTTPResetContent',
    'HTTPSeeOther',
    'HTTPServerError',
    'HTTPServiceUnavailable',
    'HTTPSuccessful',
    'HTTPTemporaryRedirect',
    'HTTPTooManyRequests',
    'HTTPUnauthorized',
    'HTTPUnavailableForLegalReasons',
    'HTTPUnprocessableEntity',
    'HTTPUnsupportedMediaType',
    'HTTPUpgradeRequired',
    'HTTPUseProxy',
    'HTTPVariantAlsoNegotiates',
    'HTTPVersionNotSupported',
    # web_fileresponse
    'FileResponse',
    # web_middlewares
    'middleware',
    'normalize_path_middleware',
    # web_protocol
    'PayloadAccessError',
    'RequestHandler',
    'RequestPayloadError',
    # web_request
    'BaseRequest',
    'FileField',
    'Request',
    # web_response
    'ContentCoding',
    'Response',
    'StreamResponse',
    'json_response',
    # web_routedef
    'AbstractRouteDef',
    'RouteDef',
    'RouteTableDef',
    'StaticDef',
    'delete',
    'get',
    'head',
    'options',
    'patch',
    'post',
    'put',
    'route',
    'static',
    'view',
    # web_runner
    'AppRunner',
    'BaseRunner',
    'BaseSite',
    'GracefulExit',
    'ServerRunner',
    'SockSite',
    'TCPSite',
    'UnixSite',
    # web_server
    'Server',
    # web_urldispatcher
    'AbstractResource',
    'AbstractRoute',
    'DynamicResource',
    'PlainResource',
    'Resource',
    'ResourceRoute',
    'StaticResource',
    'UrlDispatcher',
    'UrlMappingMatchInfo',
    'View',
    # web_ws
    'WebSocketReady',
    'WebSocketResponse',
    'WSMsgType',
    # web
    'run_app',
)


try:
    from ssl import SSLContext
except ImportError:  # pragma: no cover
    SSLContext = Any  # type: ignore


async def _run_app(app: Union[Application, Awaitable[Application]], *,
                   host: Optional[str]=None,
                   port: Optional[int]=None,
                   path: Optional[str]=None,
                   sock: Optional[socket.socket]=None,
                   shutdown_timeout: float=60.0,
                   ssl_context: Optional[SSLContext]=None,
                   print: Callable[..., None]=print,
                   backlog: int=128,
                   access_log_class: Type[AbstractAccessLogger]=AccessLogger,
                   access_log_format: str=AccessLogger.LOG_FORMAT,
                   access_log: Optional[logging.Logger]=access_logger,
                   handle_signals: bool=True,
                   reuse_address: Optional[bool]=None,
                   reuse_port: Optional[bool]=None) -> None:
    # A internal functio to actually do all dirty job for application running
    if asyncio.iscoroutine(app):
        app = await app  # type: ignore

    app = cast(Application, app)

    runner = AppRunner(app, handle_signals=handle_signals,
                       access_log_class=access_log_class,
                       access_log_format=access_log_format,
                       access_log=access_log)

    await runner.setup()

    sites = []  # type: List[BaseSite]

    try:
        if host is not None:
            if isinstance(host, (str, bytes, bytearray, memoryview)):
                sites.append(TCPSite(runner, host, port,
                                     shutdown_timeout=shutdown_timeout,
                                     ssl_context=ssl_context,
                                     backlog=backlog,
                                     reuse_address=reuse_address,
                                     reuse_port=reuse_port))
            else:
                for h in host:
                    sites.append(TCPSite(runner, h, port,
                                         shutdown_timeout=shutdown_timeout,
                                         ssl_context=ssl_context,
                                         backlog=backlog,
                                         reuse_address=reuse_address,
                                         reuse_port=reuse_port))
        elif path is None and sock is None or port is not None:
            sites.append(TCPSite(runner, port=port,
                                 shutdown_timeout=shutdown_timeout,
                                 ssl_context=ssl_context, backlog=backlog,
                                 reuse_address=reuse_address,
                                 reuse_port=reuse_port))

        if path is not None:
            if isinstance(path, (str, bytes, bytearray, memoryview)):
                sites.append(UnixSite(runner, path,
                                      shutdown_timeout=shutdown_timeout,
                                      ssl_context=ssl_context,
                                      backlog=backlog))
            else:
                for p in path:
                    sites.append(UnixSite(runner, p,
                                          shutdown_timeout=shutdown_timeout,
                                          ssl_context=ssl_context,
                                          backlog=backlog))

        if sock is not None:
            if not isinstance(sock, Iterable):
                sites.append(SockSite(runner, sock,
                                      shutdown_timeout=shutdown_timeout,
                                      ssl_context=ssl_context,
                                      backlog=backlog))
            else:
                for s in sock:
                    sites.append(SockSite(runner, s,
                                          shutdown_timeout=shutdown_timeout,
                                          ssl_context=ssl_context,
                                          backlog=backlog))
        for site in sites:
            await site.start()

        if print:  # pragma: no branch
            names = sorted(str(s.name) for s in runner.sites)
            print("======== Running on {} ========\n"