"""Command line interface for python-roborock.

The CLI supports both one-off commands and an interactive session mode. In session
mode, an asyncio event loop is created in a separate thread, allowing users to
interactively run commands that require async operations.

Typical CLI usage:
```
$ roborock login --email <email> [--password <password>]
$ roborock discover
$ roborock list-devices
$ roborock status --device_id <device_id>
```
...

Session mode usage:
```
$ roborock session
roborock> list-devices
...
roborock> status --device_id <device_id>
```
"""
import asyncio
import datetime
import functools
import json
import logging
import threading
from collections.abc import Callable
from dataclasses import asdict, dataclass
from pathlib import Path
from typing import Any, cast

import click
import click_shell
import yaml
from pyshark import FileCapture  # type: ignore
from pyshark.capture.live_capture import LiveCapture, UnknownInterfaceException  # type: ignore
from pyshark.packet.packet import Packet  # type: ignore

from roborock import SHORT_MODEL_TO_ENUM, DeviceFeatures, RoborockCommand, RoborockException
from roborock.containers import DeviceData, HomeData, NetworkInfo, RoborockBase, UserData
from roborock.devices.cache import Cache, CacheData
from roborock.devices.device import RoborockDevice
from roborock.devices.device_manager import DeviceManager, create_device_manager, create_home_data_api
from roborock.devices.traits import Trait
from roborock.devices.traits.v1 import V1TraitMixin
from roborock.protocol import MessageParser
from roborock.version_1_apis.roborock_mqtt_client_v1 import RoborockMqttClientV1
from roborock.web_api import RoborockApiClient

_LOGGER = logging.getLogger(__name__)


def dump_json(obj: Any) -> Any:
    """Dump an object as JSON."""

    def custom_json_serializer(obj):
        if isinstance(obj, datetime.time):
            return obj.isoformat()
        raise TypeError(f"Object of type {obj.__class__.__name__} is not JSON serializable")

    return json.dumps(obj, default=custom_json_serializer)


def async_command(func):
    """Decorator for async commands that work in both CLI and session modes.

    The CLI supports two execution modes:
    1. CLI mode: One-off commands that create their own event loop
    2. Session mode: Interactive shell with a persistent background event loop

    This decorator ensures async commands work correctly in both modes:
    - CLI mode: Uses asyncio.run() to create a new event loop
    - Session mode: Uses the existing session event loop via run_in_session()
    """

    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        ctx = args[0]
        context: RoborockContext = ctx.obj

        async def run():
            return await func(*args, **kwargs)

        if context.is_session_mode():
            # Session mode - run in the persistent loop
            return context.run_in_session(run())
        else:
            # CLI mode - just run normally (asyncio.run handles loop creation)
            return asyncio.run(run())

    return wrapper


@dataclass
class ConnectionCache(RoborockBase):
    """Cache for Roborock data.

    This is used to store data retrieved from the Roborock API, such as user
    data and home data to avoid repeated API calls.

    This cache is superset of `LoginData` since we used to directly store that
    dataclass, but now we also store additional data.
    """

    user_data: UserData
    email: str
    home_data: HomeData | None = None
    network_info: dict[str, NetworkInfo] | None = None


class DeviceConnectionManager:
    """Manages device connections for both CLI and session modes."""

    def __init__(self, context: "RoborockContext", loop: asyncio.AbstractEventLoop | None = None):
        self.context = context
        self.loop = loop
        self.device_manager: DeviceManager | None = None
        self._devices: dict[str, RoborockDevice] = {}

    async def ensure_device_manager(self) -> DeviceManager:
        """Ensure device manager is initialized."""
        if self.device_manager is None:
            cache_data = self.context.cache_data()
            home_data_api = create_home_data_api(cache_data.email, cache_data.user_data)
            self.device_manager = await create_device_manager(cache_data.user_data, home_data_api, self.context)
            # Cache devices for quick lookup
            devices = await self.device_manager.get_devices()
            self._devices = {device.duid: device for device in devices}
        return self.device_manager

    async def get_device(self, device_id: str) -> RoborockDevice:
        """Get a device by ID, creating connections if needed."""
        await self.ensure_device_manager()
        if device_id not in self._devices:
            raise RoborockException(f"Device {device_id} not found")
        return self._devices[device_id]

    async def close(self):
        """Close device manager connections."""
        if self.device_manager:
            await self.device_manager.close()
            self.device_manager = None
            self._devices = {}


class RoborockContext(Cache):
    """Context that handles both CLI and session modes internally."""

    roborock_file = Path("~/.roborock").expanduser()
    _cache_data: ConnectionCache | None = None

    def __init__(self):
        self.reload()
        self._session_loop: asyncio.AbstractEventLoop | None = None
        self._session_thread: threading.Thread | None = None
        self._device_manager: DeviceConnectionManager | None = None

    def reload(self):
        if self.roborock_file.is_file():
            with open(self.roborock_file) as f:
                data = json.load(f)
                if data:
                    self._cache_data = ConnectionCache.from_dict(data)

    def update(self, cache_data: ConnectionCache):
        data = json.dumps(cache_data.as_dict(), default=vars, indent=4)
        with open(self.roborock_file, "w") as f:
            f.write(data)
        self.reload()

    def validate(self):
        if self._cache_data is None:
            raise RoborockException("You must login first")

    def cache_data(self) -> ConnectionCache:
        """Get the cache data."""
        self.validate()
        return cast(ConnectionCache, self._cache_data)

    def start_session_mode(self):
        """Start session mode with a background event loop."""
        if self._session_loop is not None:
            return  # Already started

        self._session_loop = asyncio.new_event_loop()
        self._session_thread = threading.Thread(target=self._run_session_loop)
        self._session_thread.daemon = True
        self._session_thread.start()

    def _run_session_loop(self):
        """Run the session event loop in a background thread."""
        assert self._session_loop is not None  # guaranteed by start_session_mode
        asyncio.set_event_loop(self._session_loop)
        self._session_loop.run_forever()

    def is_session_mode(self) -> bool:
        return self._session_loop is not None

    def run_in_session(self, coro):
        """Run a coroutine in the session loop (session mode only)."""
        if not self._session_loop:
            raise RoborockException("Not in session mode")
        future = asyncio.run_coroutine_threadsafe(coro, self._session_loop)
        return future.result()

    async def get_device_manager(self) -> DeviceConnectionManager:
        """Get device manager, creating if needed."""
        await self.get_devices()
        if self._device_manager is None:
            self._device_manager = DeviceConnectionManager(self, self._session_loop)
        return self._device_manager

    async def refresh_devices(self) -> ConnectionCache:
        """Refresh device data from server (always fetches fresh data)."""
        cache_data = self.cache_data()
        client = RoborockApiClient(cache_data.email)
        home_data = await client.get_home_data_v3(cache_data.user_data)
        cache_data.home_data = home_data
        self.update(cache_data)
        return cache_data

    async def get_devices(self) -> ConnectionCache:
        """Get device data (uses cache if available, fetches if needed)."""
        cache_data = self.cache_data()
        if not cache_data.home_data:
            cache_data = await self.refresh_devices()
        return cache_data

    async def cleanup(self):
        """Clean up resources (mainly for session mode)."""
        if self._device_manager:
            await self._device_manager.close()
            self._device_manager = None

        # Stop session loop if running
        if self._session_loop:
            self._session_loop.call_soon_threadsafe(self._session_loop.stop)
            if self._session_thread:
                self._session_thread.join(timeout=5.0)
            self._session_loop = None
            self._session_thread = None

    def finish_session(self) -> None:
        """Finish the session and clean up resources."""
        if self._session_loop:
            future = asyncio.run_coroutine_threadsafe(self.cleanup(), self._session_loop)
            future.result(timeout=5.0)

    async def get(self) -> CacheData:
        """Get cached value."""
        connection_cache = self.cache_data()
        return CacheData(home_data=connection_cache.home_data, network_info=connection_cache.network_info or {})

    async def set(self, value: CacheData) -> None:
        """Set value in the cache."""
        connection_cache = self.cache_data()
        connection_cache.home_data = value.home_data
        connection_cache.network_info = value.network_info
        self.update(connection_cache)


@click.option("-d", "--debug", default=False, count=True)
@click.version_option(package_name="python-roborock")
@click.group()
@click.pass_context
def cli(ctx, debug: int):
    logging_config: dict[str, Any] = {"level": logging.DEBUG if debug > 0 else logging.INFO}
    logging.basicConfig(**logging_config)  # type: ignore
    ctx.obj = RoborockContext()


@click.command()
@click.option("--email", required=True)
@click.option(
    "--password",
    required=False,
    help="Password for the Roborock account. If not provided, an email code will be requested.",
)
@click.pass_context
@async_command
async def login(ctx, email, password):
    """Login to Roborock account."""
    context: RoborockContext = ctx.obj
    try:
        context.validate()
        _LOGGER.info("Already logged in")
        return
    except RoborockException:
        pass
    client = RoborockApiClient(email)
    if password is not None:
        user_data = await client.pass_login(password)
    else:
        print(f"Requesting code for {email}")
        await client.request_code()
        code = click.prompt("A code has been sent to your email, please enter the code", type=str)
        user_data = await client.code_login(code)
        print("Login successful")
    context.update(ConnectionCache(user_data=user_data, email=email))


def _shell_session_finished(ctx):
    """Callback for when shell session finishes."""
    context: RoborockContext = ctx.obj
    try:
        context.finish_session()
    except Exception as e:
        click.echo(f"Error during cleanup: {e}", err=True)
    click.echo("Session finished")


@click_shell.shell(
    prompt="roborock> ",
    on_finished=_shell_session_finished,
)
@click.pass_context
def session(ctx):
    """Start an interactive session."""
    context: RoborockContext = ctx.obj
    # Start session mode with background loop
    context.start_session_mode()
    context.run_in_session(context.get_device_manager())
    click.echo("OK")


@session.command()
@click.pass_context
@async_command
async def discover(ctx):
    """Discover devices."""
    context: RoborockContext = ctx.obj
    # Use the explicit refresh method for the discover command
    cache_data = await context.refresh_devices()

    home_data = cache_data.home_data
    click.echo(f"Discovered devices {', '.join([device.name for device in home_data.get_all_devices()])}")


@session.command()
@click.pass_context
@async_command
async def list_devices(ctx):
    context: RoborockContext = ctx.obj
    cache_data = await context.get_devices()

    home_data = cache_data.home_data

    device_name_id = {device.name: device.duid for device in home_data.get_all_devices()}
    click.echo(json.dumps(device_name_id, indent=4))


@click.command()
@click.option("--device_id", required=True)
@click.pass_context
@async_command
async def list_scenes(ctx, device_id):
    context: RoborockContext = ctx.obj
    cache_data = await context.get_devices()

    client = RoborockApiClient(cache_data.email)
    scenes = await client.get_scenes(cache_data.user_data, device_id)
    output_list = []
    for scene in scenes:
        output_list.append(scene.as_dict())
    click.echo(json.dumps(output_list, indent=4))


@click.command()
@click.option("--scene_id", required=True)
@click.pass_context
@async_command
async def execute_scene(ctx, scene_id):
    context: RoborockContext = ctx.obj
    cache_data = await context.get_devices()

    client = RoborockApiClient(cache_data.email)
    await client.execute_scene(cache_data.user_data, scene_id)


async def _v1_trait(context: RoborockContext, device_id: str, display_func: Callable[[], V1TraitMixin]) -> Trait:
    device_manager = await context.get_device_manager()
    device = await device_manager.get_device(device_id)
    if device.v1_properties is None:
        raise RoborockException(f"Device {device.name} does not support V1 protocol")

    trait = display_func(device.v1_properties)
    await trait.refresh()
    return trait


async def _display_v1_trait(context: RoborockContext, device_id: str, display_func: Callable[[], Trait]) -> None:
    trait = await _v1_trait(context, device_id, display_func)
    click.echo(dump_json(trait.as_dict()))


@session.command()
@click.option("--device_id", required=True)
@click.pass_context
@async_command
async def status(ctx, device_id: str):
    """Get device status."""
    context: RoborockContext = ctx.obj
    await _display_v1_trait(context, device_id, lambda v1: v1.status)


@session.command()
@click.option("--device_id", required=True)
@click.pass_context
@async_command
async def clean_summary(ctx, device_id: str):
    """Get device clean summary."""
    context: RoborockContext = ctx.obj
    await _display_v1_trait(context, device_id, lambda v1: v1.clean_summary)


@session.command()
@click.option("--device_id", required=True)
@click.pass_context
@async_command
async def volume(ctx, device_id: str):
    """Get device volume."""
    context: RoborockContext = ctx.obj
    await _display_v1_trait(context, device_id, lambda v1: v1.sound_volume)


@session.command()
@click.option("--device_id", required=True)
@click.option("--volume", required=True, type=int)
@click.pass_context
@async_command
async def set_volume(ctx, device_id: str, volume: int):
    """Set the devicevolume."""
    context: RoborockContext = ctx.obj
    volume_trait = await _v1_trait(context, device_id, lambda v1: v1.sound_volume)
    await volume_trait.set_volume(volume)
    click.echo(f"Set Device {device_id} volume to {volume}")


@click.command()
@click.option("--device_id", required=True)
@click.option("--cmd", required=True)
@click.option("--params", required=False)
@click.pass_context
@async_command
async def command(ctx, cmd, device_id, params):
    context: RoborockContext = ctx.obj
    cache_data = await context.get_devices()

    home_data = cache_data.home_data
    devices = home_data.get_all_devices()
    device = next(device for device in devices if device.duid == device_id)
    model = next(
        (product.model for product in home_data.products if device is not None and product.id == device.product_id),
        None,
    )
    if model is None:
        raise RoborockException(f"Could not find model for device {device.name}")
    device_info = DeviceData(device=device, model=model)
    mqtt_client = RoborockMqttClientV1(cache_data.user_data, device_info)
    await mqtt_client.send_command(cmd, json.loads(params) if params is not None else None)
    await mqtt_client.async_release()


@click.command()
@click.option("--local_key", required=True)
@click.option("--device_ip", required=True)
@click.option("--file", required=False)
@click.pass_context
@async_command
async def parser(_, local_key, device_ip, file):
    file_provided = file is not None
    if file_provided:
        capture = FileCapture(file)
    else:
        _LOGGER.info("Listen for interface rvi0 since no file was provided")
        capture = LiveCapture(interface="rvi0")
    buffer = {"data": b""}

    def on_package(packet: Packet):
        if hasattr(packet, "ip"):
            if packet.transport_layer == "TCP" and (packet.ip.dst == device_ip or packet.ip.src == device_ip):
                if hasattr(packet, "DATA"):
                    if hasattr(packet.DATA, "data"):
                        if packet.ip.dst == device_ip:
                            try:
                                f, buffer["data"] = MessageParser.parse(
                                    buffer["data"] + bytes.fromhex(packet.DATA.data),
                                    local_key,
                                )
                                print(f"Received request: {f}")
                            except BaseException as e:
                                print(e)
                                pass
                        elif packet.ip.src == device_ip:
                            try:
                                f, buffer["data"] = MessageParser.parse(
                                    buffer["data"] + bytes.fromhex(packet.DATA.data),
                                    local_key,
                                )
                                print(f"Received response: {f}")
                            except BaseException as e:
                                print(e)
                                pass

    try:
        await capture.packets_from_tshark(on_package, close_tshark=not file_provided)
    except UnknownInterfaceException:
        raise RoborockException(
            "You need to run 'rvictl -s XXXXXXXX-XXXXXXXXXXXXXXXX' first, with an iPhone connected to usb port"
        )


@click.command()
@click.pass_context
@async_command
async def get_device_info(ctx: click.Context):
    """
    Connects to devices and prints their feature information in YAML format.
    """
    click.echo("Discovering devices...")
    context: RoborockContext = ctx.obj
    cache_data = await context.get_devices()

    home_data = cache_data.home_data

    all_devices = home_data.get_all_devices()
    if not all_devices:
        click.echo("No devices found.")
        return

    click.echo(f"Found {len(all_devices)} devices. Fetching data...")

    all_products_data = {}

    for device in all_devices:
        click.echo(f"  - Processing {device.name} ({device.duid})")
        product_info = home_data.product_map[device.product_id]
        device_data = DeviceData(device, product_info.model)
        mqtt_client = RoborockMqttClientV1(cache_data.user_data, device_data)

        try:
            init_status_result = await mqtt_client.send_command(
                RoborockCommand.APP_GET_INIT_STATUS,
            )
            product_nickname = SHORT_MODEL_TO_ENUM.get(product_info.model.split(".")[-1]).name
            current_product_data = {
                "Protocol Version": device.pv,
                "Product Nickname": product_nickname,
                "New Feature Info": init_status_result.get("new_feature_info"),
                "New Feature Info Str": init_status_result.get("new_feature_info_str"),
                "Feature Info": init_status_result.get("feature_info"),
            }

            all_products_data[product_info.model] = current_product_data

        except Exception as e:
            click.echo(f"    - Error processing device {device.name}: {e}", err=True)
        finally:
            await mqtt_client.async_release()

    if all_products_data:
        click.echo("\n--- Device Information (copy to your YAML file) ---\n")
        # Use yaml.dump to print in a clean, copy-paste friendly format
        click.echo(yaml.dump(all_products_data, sort_keys=False))


@click.command()
@click.option("--data-file", default="../device_info.yaml", help="Path to the YAML file with device feature data.")
@click.option("--output-file", default="../SUPPORTED_FEATURES.md", help="Path to the output markdown file.")
def update_docs(data_file: str, output_file: str):
    """
    Generates a markdown file by processing raw feature data from a YAML file.
    """
    data_path = Path(data_file)
    output_path = Path(output_file)

    if not data_path.exists():
        click.echo(f"Error: Data file not found at '{data_path}'", err=True)
        return

    click.echo(f"Loading data from {data_path}...")
    with open(data_path, encoding="utf-8") as f:
        product_data_from_yaml = yaml.safe_load(f)

    if not product_data_from_yaml:
        click.echo("No data found in YAML file. Exiting.", err=True)
        return

    product_features_map = {}
    all_feature_names = set()

    # Process the raw data from YAML to build the feature map
    for model, data in product_data_from_yaml.items():
        # Reconstruct the DeviceFeatures object from the raw data in the YAML file
        device_features = DeviceFeatures.from_feature_flags(
            new_feature_info=data.get("New Feature Info"),
            new_feature_info_str=data.get("New Feature Info Str"),
            feature_info=data.get("Feature Info"),
            product_nickname=data.get("Product Nickname"),
        )
        features_dict = asdict(device_features)

        # This dictionary will hold the final data for the markdown table row
        current_product_data = {
            "Product Nickname": data.get("Product Nickname", ""),
            "Protocol Version": data.get("Protocol Version", ""),
            "New Feature Info": data.get("New Feature Info", ""),
            "New Feature Info Str": data.get("New Feature Info Str", ""),
        }

        # Populate features from the calculated DeviceFeatures object
        for feature, is_supported in features_dict.items():
            all_feature_names.add(feature)
            if is_supported:
                current_product_data[feature] = "X"

        supported_codes = data.get("Feature Info", [])
        if isinstance(supported_codes, list):
            for code in supported_codes:
                feature_name = str(code)
                all_feature_names.add(feature_name)
                current_product_data[feature_name] = "X"

        product_features_map[model] = current_product_data

    # --- Helper function to write the markdown table ---
    def write_markdown_table(product_features: dict[str, dict[str, any]], all_features: set[str]):
        """Writes the data into a markdown table (products as columns)."""
        sorted_products = sorted(product_features.keys())
        special_rows = [
            "Product Nickname",
            "Protocol Version",
            "New Feature Info",
            "New Feature Info Str",
        ]
        # Regular features are the remaining keys, sorted alphabetically
        # We filter out the special rows to avoid duplicating them.
        sorted_features = sorted(list(all_features - set(special_rows)))

        header = ["Feature"] + sorted_products

        click.echo(f"Writing documentation to {output_path}...")
        with open(output_path, "w", encoding="utf-8") as f:
            f.write("| " + " | ".join(header) + " |\n")
            f.write("|" + "---|" * len(header) + "\n")

            # Write the special metadata rows first
            for row_name in special_rows:
                row_values = [str(product_features[p].get(row_name, "")) for p in sorted_products]
                f.write("| " + " | ".join([row_name] + row_values) + " |\n")

            # Write the feature rows
            for feature in sorted_features:
                # Use backticks for feature names that are just numbers (from the list)
                display_feature = f"`{feature}`"
                feature_row = [display_feature]
                for product in sorted_products:
                    # Use .get() to place an 'X' or an empty string
                    feature_row.append(product_features[product].get(feature, ""))
                f.write("| " + " | ".join(feature_row) + " |\n")

    write_markdown_table(product_features_map, all_feature_names)
    click.echo("Done.")


cli.add_command(login)
cli.add_command(discover)
cli.add_command(list_devices)
cli.add_command(list_scenes)
cli.add_command(execute_scene)
cli.add_command(status)
cli.add_command(command)
cli.add_command(parser)
cli.add_command(session)
cli.add_command(get_device_info)
cli.add_command(update_docs)
cli.add_command(clean_summary)
cli.add_command(volume)
cli.add_command(set_volume)


def main():
    return cli()


if __name__ == "__main__":
    main()