"""Shared fixtures for gateway e2e tests (Telegram, Discord).

These tests exercise the full async message flow:
    adapter.handle_message(event)
        → background task
        → GatewayRunner._handle_message (command dispatch)
        → adapter.send() (captured by mock)

No LLM, no real platform connections.
"""

import asyncio
import sys
import uuid
from datetime import datetime, timezone
from types import SimpleNamespace
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from gateway.config import GatewayConfig, Platform, PlatformConfig
from gateway.platforms.base import MessageEvent, SendResult
from gateway.session import SessionEntry, SessionSource, build_session_key

E2E_MESSAGE_SETTLE_DELAY = 0.3

# Platform library mocks

# Ensure telegram module is available (mock it if not installed)
def _ensure_telegram_mock():
    """Install mock telegram modules so TelegramAdapter can be imported."""
    if "telegram" in sys.modules and hasattr(sys.modules["telegram"], "__file__"):
        return # Real library installed

    telegram_mod = MagicMock()
    telegram_mod.Update = MagicMock()
    telegram_mod.Update.ALL_TYPES = []
    telegram_mod.Bot = MagicMock
    telegram_mod.constants.ParseMode.MARKDOWN_V2 = "MarkdownV2"
    telegram_mod.ext.Application = MagicMock()
    telegram_mod.ext.Application.builder = MagicMock
    telegram_mod.ext.ContextTypes.DEFAULT_TYPE = type(None)
    telegram_mod.ext.MessageHandler = MagicMock
    telegram_mod.ext.CommandHandler = MagicMock
    telegram_mod.ext.filters = MagicMock()
    telegram_mod.request.HTTPXRequest = MagicMock

    for name in (
        "telegram",
        "telegram.constants",
        "telegram.ext",
        "telegram.ext.filters",
        "telegram.request",
    ):
        sys.modules.setdefault(name, telegram_mod)


# Ensure discord module is available (mock it if not installed)
def _ensure_discord_mock():
    """Install mock discord modules so DiscordAdapter can be imported."""
    if "discord" in sys.modules and hasattr(sys.modules["discord"], "__file__"):
        return # Real library installed

    discord_mod = MagicMock()
    discord_mod.Intents.default.return_value = MagicMock()
    discord_mod.DMChannel = type("DMChannel", (), {})
    discord_mod.Thread = type("Thread", (), {})
    discord_mod.ForumChannel = type("ForumChannel", (), {})
    discord_mod.Forbidden = type("Forbidden", (Exception,), {})
    discord_mod.MessageType = SimpleNamespace(default=0, reply=19)
    discord_mod.Object = lambda *, id: SimpleNamespace(id=id)
    discord_mod.Interaction = object
    discord_mod.app_commands = SimpleNamespace(
        describe=lambda **kwargs: (lambda fn: fn),
        choices=lambda **kwargs: (lambda fn: fn),
        Choice=lambda **kwargs: SimpleNamespace(**kwargs),
    )
    discord_mod.opus.is_loaded.return_value = True

    ext_mod = MagicMock()
    commands_mod = MagicMock()
    commands_mod.Bot = MagicMock
    ext_mod.commands = commands_mod

    sys.modules.setdefault("discord", discord_mod)
    sys.modules.setdefault("discord.ext", ext_mod)
    sys.modules.setdefault("discord.ext.commands", commands_mod)
    sys.modules.setdefault("discord.opus", discord_mod.opus)


def _ensure_slack_mock():
    """Install mock slack modules so SlackAdapter can be imported."""
    if "slack_bolt" in sys.modules and hasattr(sys.modules["slack_bolt"], "__file__"):
        return  # Real library installed

    slack_bolt = MagicMock()
    slack_bolt.async_app.AsyncApp = MagicMock
    slack_bolt.adapter.socket_mode.async_handler.AsyncSocketModeHandler = MagicMock

    slack_sdk = MagicMock()
    slack_sdk.web.async_client.AsyncWebClient = MagicMock

    for name, mod in [
        ("slack_bolt", slack_bolt),
        ("slack_bolt.async_app", slack_bolt.async_app),
        ("slack_bolt.adapter", slack_bolt.adapter),
        ("slack_bolt.adapter.socket_mode", slack_bolt.adapter.socket_mode),
        ("slack_bolt.adapter.socket_mode.async_handler", slack_bolt.adapter.socket_mode.async_handler),
        ("slack_sdk", slack_sdk),
        ("slack_sdk.web", slack_sdk.web),
        ("slack_sdk.web.async_client", slack_sdk.web.async_client),
    ]:
        sys.modules.setdefault(name, mod)


_ensure_telegram_mock()
_ensure_discord_mock()
_ensure_slack_mock()

import discord  # noqa: E402 — mocked above
from gateway.platforms.telegram import TelegramAdapter  # noqa: E402
from plugins.platforms.discord.adapter import DiscordAdapter  # noqa: E402

import gateway.platforms.slack as _slack_mod  # noqa: E402
_slack_mod.SLACK_AVAILABLE = True
from gateway.platforms.slack import SlackAdapter  # noqa: E402


# Platform-generic factories

def make_source(platform: Platform, chat_id: str = "e2e-chat-1", user_id: str = "e2e-user-1", chat_type: str = "dm") -> SessionSource:
    return SessionSource(
        platform=platform,
        chat_id=chat_id,
        user_id=user_id,
        user_name="e2e_tester",
        chat_type=chat_type,
    )


def make_session_entry(platform: Platform, source: SessionSource = None) -> SessionEntry:
    source = source or make_source(platform)
    return SessionEntry(
        session_key=build_session_key(source),
        session_id=f"sess-{uuid.uuid4().hex[:8]}",
        created_at=datetime.now(),
        updated_at=datetime.now(),
        platform=platform,
        chat_type="dm",
    )


def make_event(
    platform: Platform,
    text: str = "/help",
    chat_id: str = "e2e-chat-1",
    user_id: str = "e2e-user-1",
    chat_type: str = "dm",
) -> MessageEvent:
    return MessageEvent(
        text=text,
        source=make_source(platform, chat_id, user_id, chat_type),
        message_id=f"msg-{uuid.uuid4().hex[:8]}",
    )


def make_runner(platform: Platform, session_entry: SessionEntry = None) -> "GatewayRunner":
    """Create a GatewayRunner with mocked internals for e2e testing.

    Skips __init__ to avoid filesystem/network side effects.
    """
    from gateway.run import GatewayRunner

    if session_entry is None:
        session_entry = make_session_entry(platform)

    runner = object.__new__(GatewayRunner)
    runner.config = GatewayConfig(
        platforms={platform: PlatformConfig(enabled=True, token="e2e-test-token")}
    )
    runner.adapters = {}
    runner._voice_mode = {}
    runner.hooks = SimpleNamespace(emit=AsyncMock(), loaded_hooks=False)

    runner.session_store = MagicMock()
    runner.session_store.get_or_create_session.return_value = session_entry
    runner.session_store.load_transcript.return_value = []
    runner.session_store.has_any_sessions.return_value = True
    runner.session_store.append_to_transcript = MagicMock()
    runner.session_store.rewrite_transcript = MagicMock()
    runner.session_store.update_session = MagicMock()
    runner.session_store.reset_session = MagicMock()

    runner._running_agents = {}
    runner._pending_messages = {}
    runner._pending_approvals = {}
    runner._shutdown_event = asyncio.Event()
    runner._exit_reason = None
    runner._exit_code = None
    runner._background_tasks = set()
    runner._draining = False
    runner._restart_requested = False
    runner._restart_task_started = False
    runner._restart_detached = False
    runner._restart_via_service = False
    from gateway.restart import DEFAULT_GATEWAY_RESTART_DRAIN_TIMEOUT
    runner._restart_drain_timeout = DEFAULT_GATEWAY_RESTART_DRAIN_TIMEOUT
    runner._stop_task = None
    runner._busy_input_mode = "interrupt"
    runner._running_agents_ts = {}
    runner._pending_model_notes = {}
    runner._update_prompt_pending = {}
    runner._voice_mode = {}
    runner._session_db = None
    runner._reasoning_config = None
    runner._provider_routing = {}
    runner._fallback_model = None
    runner._show_reasoning = False

    runner._is_user_authorized = lambda _source: True
    runner._set_session_env = lambda _context: None
    runner._handle_message_with_agent = AsyncMock(return_value="agent-handled-default")
    runner._should_send_voice_reply = lambda *_a, **_kw: False
    runner._send_voice_reply = AsyncMock()
    runner._capture_gateway_honcho_if_configured = lambda *a, **kw: None
    runner._emit_gateway_run_progress = AsyncMock()

    # Disable destructive slash confirm gate so /new executes immediately
    runner._read_user_config = lambda: {"approvals": {"destructive_slash_confirm": False}}

    runner.pairing_store = MagicMock()
    runner.pairing_store._is_rate_limited = MagicMock(return_value=False)
    runner.pairing_store.generate_code = MagicMock(return_value="ABC123")

    return runner


def make_adapter(platform: Platform, runner=None):
    """Create a platform adapter wired to *runner*, with send methods mocked."""
    if runner is None:
        runner = make_runner(platform)

    config = PlatformConfig(enabled=True, token="e2e-test-token")

    if platform == Platform.DISCORD:
        from gateway.platforms.helpers import ThreadParticipationTracker
        with patch.object(ThreadParticipationTracker, "_load", return_value=set()):
            adapter = DiscordAdapter(config)
        platform_key = Platform.DISCORD
    elif platform == Platform.SLACK:
        adapter = SlackAdapter(config)
        platform_key = Platform.SLACK
    else:
        adapter = TelegramAdapter(config)
        platform_key = Platform.TELEGRAM

    adapter.send = AsyncMock(return_value=SendResult(success=True, message_id="e2e-resp-1"))
    adapter.send_typing = AsyncMock()

    adapter.set_message_handler(runner._handle_message)
    runner.adapters[platform_key] = adapter

    return adapter


async def send_and_capture(adapter, text: str, platform: Platform, **event_kwargs) -> AsyncMock:
    """Send a message through the full e2e flow and return the send mock."""
    event = make_event(platform, text, **event_kwargs)
    adapter.send.reset_mock()
    await adapter.handle_message(event)
    await asyncio.sleep(0.3)
    return adapter.send


# Parametrized fixtures for platform-generic tests
@pytest.fixture(params=[Platform.TELEGRAM, Platform.DISCORD, Platform.SLACK], ids=["telegram", "discord", "slack"])
def platform(request):
    return request.param


@pytest.fixture()
def source(platform):
    return make_source(platform)


@pytest.fixture()
def session_entry(platform, source):
    return make_session_entry(platform, source)


@pytest.fixture()
def runner(platform, session_entry):
    return make_runner(platform, session_entry)


@pytest.fixture()
def adapter(platform, runner):
    return make_adapter(platform, runner)


# ═══════════════════════════════════════════════════════════════════════════
# Discord helpers and fixtures
# ═══════════════════════════════════════════════════════════════════════════

BOT_USER_ID = 99999
BOT_USER_NAME = "HermesBot"
CHANNEL_ID = 22222
GUILD_ID = 44444
THREAD_ID = 33333
MESSAGE_ID_COUNTER = 0


def _next_message_id() -> int:
    global MESSAGE_ID_COUNTER
    MESSAGE_ID_COUNTER += 1
    return 70000 + MESSAGE_ID_COUNTER


def make_fake_bot_user():
    return SimpleNamespace(
        id=BOT_USER_ID, name=BOT_USER_NAME,
        display_name=BOT_USER_NAME, bot=True,
    )


def make_fake_guild(guild_id: int = GUILD_ID, name: str = "Test Server"):
    return SimpleNamespace(id=guild_id, name=name)


def make_fake_text_channel(channel_id: int = CHANNEL_ID, name: str = "general", guild=None):
    return SimpleNamespace(
        id=channel_id, name=name,
        guild=guild or make_fake_guild(),
        topic=None, type=0,
    )


def make_fake_dm_channel(channel_id: int = 55555):
    ch = MagicMock(spec=[])
    ch.id = channel_id
    ch.name = "DM"
    ch.topic = None
    ch.__class__ = discord.DMChannel
    return ch


def make_fake_thread(thread_id: int = THREAD_ID, name: str = "test-thread", parent=None):
    th = MagicMock(spec=[])
    th.id = thread_id
    th.name = name
    th.parent = parent or make_fake_text_channel()
    th.parent_id = th.parent.id
    th.guild = th.parent.guild
    th.topic = None
    th.type = 11
    th.__class__ = discord.Thread
    return th


def make_discord_message(
    *, content: str = "hello", author=None, channel=None, mentions=None,
    attachments=None, message_id: int = None,
):
    if message_id is None:
        message_id = _next_message_id()
    if author is None:
        author = SimpleNamespace(
            id=11111, name="testuser", display_name="testuser", bot=False,
        )
    if channel is None:
        channel = make_fake_text_channel()
    if mentions is None:
        mentions = []
    if attachments is None:
        attachments = []

    return SimpleNamespace(
        id=message_id, content=content, author=author, channel=channel,
        guild=getattr(channel, "guild", None),
        mentions=mentions, attachments=attachments,
        type=getattr(discord, "MessageType", SimpleNamespace()).default,
        reference=None, created_at=datetime.now(timezone.utc),
        create_thread=AsyncMock(),
    )


def get_response_text(adapter) -> str | None:
    """Extract the response text from adapter.send() call args, or None if not called."""
    if not adapter.send.called:
        return None
    return adapter.send.call_args[1].get("content") or adapter.send.call_args[0][1]


def _make_discord_adapter_wired(runner=None):
    """Create a DiscordAdapter wired to a GatewayRunner for e2e tests."""
    if runner is None:
        runner = make_runner(Platform.DISCORD)

    config = PlatformConfig(enabled=True, token="e2e-test-token")
    from gateway.platforms.helpers import ThreadParticipationTracker
    with patch.object(ThreadParticipationTracker, "_load", return_value=set()):
        adapter = DiscordAdapter(config)

    bot_user = make_fake_bot_user()
    adapter._client = SimpleNamespace(
        user=bot_user,
        get_channel=lambda _id: None,
        fetch_channel=AsyncMock(),
    )

    adapter.send = AsyncMock(return_value=SendResult(success=True, message_id="e2e-resp-1"))
    adapter.send_typing = AsyncMock()
    adapter.set_message_handler(runner._handle_message)
    runner.adapters[Platform.DISCORD] = adapter

    return adapter, runner


@pytest.fixture()
def discord_setup():
    return _make_discord_adapter_wired()


@pytest.fixture()
def discord_adapter(discord_setup):
    return discord_setup[0]


@pytest.fixture()
def discord_runner(discord_setup):
    return discord_setup[1]


@pytest.fixture()
def bot_user():
    return make_fake_bot_user()
