#!/usr/bin/env python3
import contextlib
import inspect
import textwrap
from pathlib import Path

from mitmproxy import addonmanager
from mitmproxy import hooks
from mitmproxy import log
from mitmproxy.proxy import layer
from mitmproxy.proxy import server_hooks
from mitmproxy.proxy.layers import dns
from mitmproxy.proxy.layers.http import _hooks as http
from mitmproxy.proxy.layers import modes
from mitmproxy.proxy.layers import quic
from mitmproxy.proxy.layers import tcp
from mitmproxy.proxy.layers import tls
from mitmproxy.proxy.layers import udp
from mitmproxy.proxy.layers import websocket

known = set()


def category(name: str, desc: str, hooks: list[type[hooks.Hook]]) -> None:
    all_params = [
        list(inspect.signature(hook.__init__, eval_str=True).parameters.values())[1:] for hook in hooks
    ]

    # slightly overengineered, but this was fun to write.  ¯\_(ツ)_/¯
    imports = set()
    types = set()
    for params in all_params:
        for param in params:
            try:
                mod = inspect.getmodule(param.annotation).__name__
                if mod == "typing":
                    # this is ugly, but can be removed once we are on Python 3.9+ only
                    imports.add(
                        inspect.getmodule(param.annotation.__args__[0]).__name__
                    )
                    types.add(param.annotation._name)
                else:
                    imports.add(mod)
            except AttributeError:
                raise ValueError(f"Missing type annotation: {params}")
    imports.discard("builtins")
    if types:
        print(f"from typing import {', '.join(sorted(types))}")
    print("import logging")
    for imp in sorted(imports):
        print(f"import {imp}")
    print()

    print(f"class {name}Events:")
    print(f'    """{desc}"""')

    first = True
    for hook, params in zip(hooks, all_params):
        if first:
            first = False
        else:
            print()
        if hook.name in known:
            raise RuntimeError(f"Already documented: {hook}")
        known.add(hook.name)
        doc = inspect.getdoc(hook)
        print(f"    def {hook.name}({', '.join(str(p) for p in ['self'] + params)}):")
        print(textwrap.indent(f'"""\n{doc}\n"""', "        "))
        if params:
            print(
                f'        logging.info(f"{hook.name}: {" ".join("{" + p.name + "=}" for p in params)}")'
            )
        else:
            print(f'        logging.info("{hook.name}")')
    print("")


outfile = Path(__file__).parent.parent / "src" / "generated" / "events.py"

with outfile.open("w") as f, contextlib.redirect_stdout(f):
    print("# This file is autogenerated, do not edit manually.")

    category(
        "Lifecycle",
        "",
        [
            addonmanager.LoadHook,
            hooks.RunningHook,
            hooks.ConfigureHook,
            hooks.DoneHook,
        ],
    )

    category(
        "Connection",
        "",
        [
            server_hooks.ClientConnectedHook,
            server_hooks.ClientDisconnectedHook,
            server_hooks.ServerConnectHook,
            server_hooks.ServerConnectedHook,
            server_hooks.ServerDisconnectedHook,
        ],
    )

    category(
        "HTTP",
        "",
        [
            http.HttpRequestHeadersHook,
            http.HttpRequestHook,
            http.HttpResponseHeadersHook,
            http.HttpResponseHook,
            http.HttpErrorHook,
            http.HttpConnectHook,
            http.HttpConnectUpstreamHook,
        ],
    )

    category(
        "DNS",
        "",
        [
            dns.DnsRequestHook,
            dns.DnsResponseHook,
            dns.DnsErrorHook,
        ],
    )

    category(
        "TCP",
        "",
        [
            tcp.TcpStartHook,
            tcp.TcpMessageHook,
            tcp.TcpEndHook,
            tcp.TcpErrorHook,
        ],
    )

    category(
        "UDP",
        "",
        [
            udp.UdpStartHook,
            udp.UdpMessageHook,
            udp.UdpEndHook,
            udp.UdpErrorHook,
        ],
    )

    category(
        "QUIC",
        "",
        [
            quic.QuicStartClientHook,
            quic.QuicStartServerHook,
        ],
    )

    category(
        "TLS",
        "",
        [
            tls.TlsClienthelloHook,
            tls.TlsStartClientHook,
            tls.TlsStartServerHook,
            tls.TlsEstablishedClientHook,
            tls.TlsEstablishedServerHook,
            tls.TlsFailedClientHook,
            tls.TlsFailedServerHook,
        ],
    )

    category(
        "WebSocket",
        "",
        [
            websocket.WebsocketStartHook,
            websocket.WebsocketMessageHook,
            websocket.WebsocketEndHook,
        ],
    )

    category(
        "SOCKSv5",
        "",
        [
            modes.Socks5AuthHook,
        ],
    )

    category(
        "AdvancedLifecycle",
        "",
        [
            layer.NextLayerHook,
            hooks.UpdateHook,
            log.AddLogHook,
        ],
    )

not_documented = set(hooks.all_hooks.keys()) - known
if not_documented:
    raise RuntimeError(f"Not documented: {not_documented}")