"""This script generates devinfo files for the test suite.

If you have new, yet unsupported device or a device with no devinfo file under
 kasa/tests/fixtures, feel free to run this script and create a PR to add the file
 to the repository.

Executing this script will several modules and methods one by one,
and finally execute a query to query all of them at once.
"""
import base64
import collections.abc
import json
import logging
import re
from collections import defaultdict, namedtuple
from pathlib import Path
from pprint import pprint
from typing import Dict, List, Union

import asyncclick as click

from devtools.helpers.smartrequests import COMPONENT_REQUESTS, SmartRequest
from kasa import (
    AuthenticationException,
    Credentials,
    Discover,
    SmartDevice,
    SmartDeviceException,
    TimeoutException,
)
from kasa.discover import DiscoveryResult
from kasa.exceptions import SmartErrorCode
from kasa.tapo.tapodevice import TapoDevice

Call = namedtuple("Call", "module method")
SmartCall = namedtuple("SmartCall", "module request should_succeed")


def scrub(res):
    """Remove identifiers from the given dict."""
    keys_to_scrub = [
        "deviceId",
        "fwId",
        "hwId",
        "oemId",
        "mac",
        "mic_mac",
        "latitude_i",
        "longitude_i",
        "latitude",
        "longitude",
        "owner",
        "device_id",
        "ip",
        "ssid",
        "hw_id",
        "fw_id",
        "oem_id",
        "nickname",
        "alias",
        "bssid",
        "channel",
    ]

    for k, v in res.items():
        if isinstance(v, collections.abc.Mapping):
            res[k] = scrub(res.get(k))
        elif (
            isinstance(v, list)
            and len(v) > 0
            and isinstance(v[0], collections.abc.Mapping)
        ):
            res[k] = [scrub(vi) for vi in v]
        else:
            if k in keys_to_scrub:
                if k in ["mac", "mic_mac"]:
                    # Some macs have : or - as a separator and others do not
                    if len(v) == 12:
                        v = f"{v[:6]}000000"
                    else:
                        delim = ":" if ":" in v else "-"
                        rest = delim.join(
                            format(s, "02x") for s in bytes.fromhex("000000")
                        )
                        v = f"{v[:8]}{delim}{rest}"
                elif k in ["latitude", "latitude_i", "longitude", "longitude_i"]:
                    v = 0
                elif k in ["ip"]:
                    v = "127.0.0.123"
                elif k in ["ssid"]:
                    # Need a valid base64 value here
                    v = base64.b64encode(b"#MASKED_SSID#").decode()
                elif k in ["nickname"]:
                    v = base64.b64encode(b"#MASKED_NAME#").decode()
                elif k in ["alias"]:
                    v = "#MASKED_NAME#"
                elif isinstance(res[k], int):
                    v = 0
                else:
                    v = re.sub(r"\w", "0", v)

            res[k] = v
    return res


def default_to_regular(d):
    """Convert nested defaultdicts to regular ones.

    From https://stackoverflow.com/a/26496899
    """
    if isinstance(d, defaultdict):
        d = {k: default_to_regular(v) for k, v in d.items()}
    return d


async def handle_device(basedir, autosave, device: SmartDevice, batch_size: int):
    """Create a fixture for a single device instance."""
    if isinstance(device, TapoDevice):
        filename, copy_folder, final = await get_smart_fixture(device, batch_size)
    else:
        filename, copy_folder, final = await get_legacy_fixture(device)

    save_filename = Path(basedir) / copy_folder / filename

    pprint(scrub(final))
    if autosave:
        save = "y"
    else:
        save = click.prompt(
            f"Do you want to save the above content to {save_filename} (y/n)"
        )
    if save == "y":
        click.echo(f"Saving info to {save_filename}")

        with open(save_filename, "w") as f:
            json.dump(final, f, sort_keys=True, indent=4)
            f.write("\n")
    else:
        click.echo("Not saving.")


@click.command()
@click.option("--host", required=False, help="Target host.")
@click.option(
    "--target",
    required=False,
    default="255.255.255.255",
    help="Target network for discovery.",
)
@click.option(
    "--username",
    default="",
    required=False,
    envvar="KASA_USERNAME",
    help="Username/email address to authenticate to device.",
)
@click.option(
    "--password",
    default="",
    required=False,
    envvar="KASA_PASSWORD",
    help="Password to use to authenticate to device.",
)
@click.option("--basedir", help="Base directory for the git repository", default=".")
@click.option("--autosave", is_flag=True, default=False, help="Save without prompting")
@click.option(
    "--batch-size", default=5, help="Number of batched requests to send at once"
)
@click.option("-d", "--debug", is_flag=True)
async def cli(host, target, basedir, autosave, debug, username, password, batch_size):
    """Generate devinfo files for devices.

    Use --host (for a single device) or --target (for a complete network).
    """
    if debug:
        logging.basicConfig(level=logging.DEBUG)

    credentials = Credentials(username=username, password=password)
    if host is not None:
        click.echo("Host given, performing discovery on %s." % host)
        device = await Discover.discover_single(host, credentials=credentials)
        await handle_device(basedir, autosave, device, batch_size)
    else:
        click.echo(
            "No --host given, performing discovery on %s. Use --target to override."
            % target
        )
        devices = await Discover.discover(target=target, credentials=credentials)
        click.echo("Detected %s devices" % len(devices))
        for dev in devices.values():
            await handle_device(basedir, autosave, dev, batch_size)


async def get_legacy_fixture(device):
    """Get fixture for legacy IOT style protocol."""
    items = [
        Call(module="system", method="get_sysinfo"),
        Call(module="emeter", method="get_realtime"),
        Call(module="smartlife.iot.dimmer", method="get_dimmer_parameters"),
        Call(module="smartlife.iot.common.emeter", method="get_realtime"),
        Call(
            module="smartlife.iot.smartbulb.lightingservice", method="get_light_state"
        ),
        Call(module="smartlife.iot.LAS", method="get_config"),
        Call(module="smartlife.iot.PIR", method="get_config"),
    ]

    successes = []

    for test_call in items:
        try:
            click.echo(f"Testing {test_call}..", nl=False)
            info = await device.protocol.query(
                {test_call.module: {test_call.method: None}}
            )
            resp = info[test_call.module]
        except Exception as ex:
            click.echo(click.style(f"FAIL {ex}", fg="red"))
        else:
            if "err_msg" in resp:
                click.echo(click.style(f"FAIL {resp['err_msg']}", fg="red"))
            else:
                click.echo(click.style("OK", fg="green"))
                successes.append((test_call, info))

    final_query = defaultdict(defaultdict)
    final = defaultdict(defaultdict)
    for succ, resp in successes:
        final_query[succ.module][succ.method] = None
        final[succ.module][succ.method] = resp

    final = default_to_regular(final)

    try:
        final = await device.protocol.query(final_query)
    except Exception as ex:
        _echo_error(f"Unable to query all successes at once: {ex}", bold=True, fg="red")

    if device._discovery_info and not device._discovery_info.get("system"):
        # Need to recreate a DiscoverResult here because we don't want the aliases
        # in the fixture, we want the actual field names as returned by the device.
        dr = DiscoveryResult(**device._discovery_info)
        final["discovery_result"] = dr.dict(
            by_alias=False, exclude_unset=True, exclude_none=True, exclude_defaults=True
        )

    click.echo("Got %s successes" % len(successes))
    click.echo(click.style("## device info file ##", bold=True))

    sysinfo = final["system"]["get_sysinfo"]
    model = sysinfo["model"]
    hw_version = sysinfo["hw_ver"]
    sw_version = sysinfo["sw_ver"]
    sw_version = sw_version.split(" ", maxsplit=1)[0]
    save_filename = f"{model}_{hw_version}_{sw_version}.json"
    copy_folder = "kasa/tests/fixtures/"
    return save_filename, copy_folder, final


def _echo_error(msg: str):
    click.echo(
        click.style(
            msg,
            bold=True,
            fg="red",
        )
    )


async def _make_requests_or_exit(
    device: SmartDevice,
    requests: List[SmartRequest],
    name: str,
    batch_size: int,
) -> Dict[str, Dict]:
    final = {}
    try:
        end = len(requests)
        step = batch_size  # Break the requests down as there seems to be a size limit
        for i in range(0, end, step):
            x = i
            requests_step = requests[x : x + step]
            request: Union[List[SmartRequest], SmartRequest] = (
                requests_step[0] if len(requests_step) == 1 else requests_step
            )
            responses = await device.protocol.query(
                SmartRequest._create_request_dict(request)
            )
            for method, result in responses.items():
                final[method] = result
        return final
    except AuthenticationException as ex:
        _echo_error(
            f"Unable to query the device due to an authentication error: {ex}",
        )
        exit(1)
    except SmartDeviceException as ex:
        _echo_error(
            f"Unable to query {name} at once: {ex}",
        )
        if (
            isinstance(ex, TimeoutException)
            or ex.error_code == SmartErrorCode.SESSION_TIMEOUT_ERROR
        ):
            _echo_error(
                "Timeout, try reducing the batch size via --batch-size option.",
            )
        exit(1)
    except Exception as ex:
        _echo_error(
            f"Unexpected exception querying {name} at once: {ex}",
        )
        exit(1)


async def get_smart_fixture(device: TapoDevice, batch_size: int):
    """Get fixture for new TAPO style protocol."""
    extra_test_calls = [
        SmartCall(
            module="temp_humidity_records",
            request=SmartRequest.get_raw_request("get_temp_humidity_records"),
            should_succeed=False,
        ),
        SmartCall(
            module="child_device_list",
            request=SmartRequest.get_raw_request("get_child_device_list"),
            should_succeed=False,
        ),
        SmartCall(
            module="child_device_component_list",
            request=SmartRequest.get_raw_request("get_child_device_component_list"),
            should_succeed=False,
        ),
        SmartCall(
            module="trigger_logs",
            request=SmartRequest.get_raw_request(
                "get_trigger_logs", SmartRequest.GetTriggerLogsParams(5, 0)
            ),
            should_succeed=False,
        ),
    ]

    successes = []

    click.echo("Testing component_nego call ..", nl=False)
    responses = await _make_requests_or_exit(
        device, [SmartRequest.component_nego()], "component_nego call", batch_size
    )
    component_info_response = responses["component_nego"]
    click.echo(click.style("OK", fg="green"))
    successes.append(
        SmartCall(
            module="component_nego",
            request=SmartRequest("component_nego"),
            should_succeed=True,
        )
    )

    test_calls = []
    should_succeed = []

    for item in component_info_response["component_list"]:
        component_id = item["id"]
        if requests := COMPONENT_REQUESTS.get(component_id):
            component_test_calls = [
                SmartCall(module=component_id, request=request, should_succeed=True)
                for request in requests
            ]
            test_calls.extend(component_test_calls)
            should_succeed.extend(component_test_calls)
        elif component_id not in COMPONENT_REQUESTS:
            click.echo(f"Skipping {component_id}..", nl=False)
            click.echo(click.style("UNSUPPORTED", fg="yellow"))

    test_calls.extend(extra_test_calls)

    for test_call in test_calls:
        click.echo(f"Testing  {test_call.module}..", nl=False)
        try:
            click.echo(f"Testing {test_call}..", nl=False)
            response = await device.protocol.query(
                SmartRequest._create_request_dict(test_call.request)
            )
        except AuthenticationException as ex:
            _echo_error(
                f"Unable to query the device due to an authentication error: {ex}",
            )
            exit(1)
        except Exception as ex:
            if (
                not test_call.should_succeed
                and hasattr(ex, "error_code")
                and ex.error_code == SmartErrorCode.UNKNOWN_METHOD_ERROR
            ):
                click.echo(click.style("FAIL - EXPECTED", fg="green"))
            else:
                click.echo(click.style(f"FAIL {ex}", fg="red"))
        else:
            if not response:
                click.echo(click.style("FAIL no response", fg="red"))
            else:
                if not test_call.should_succeed:
                    click.echo(click.style("OK - EXPECTED FAIL", fg="red"))
                else:
                    click.echo(click.style("OK", fg="green"))
                successes.append(test_call)

    requests = []
    for succ in successes:
        requests.append(succ.request)

    final = await _make_requests_or_exit(
        device, requests, "all successes at once", batch_size
    )

    # Need to recreate a DiscoverResult here because we don't want the aliases
    # in the fixture, we want the actual field names as returned by the device.
    dr = DiscoveryResult(**device._discovery_info)  # type: ignore
    final["discovery_result"] = dr.dict(
        by_alias=False, exclude_unset=True, exclude_none=True, exclude_defaults=True
    )

    click.echo("Got %s successes" % len(successes))
    click.echo(click.style("## device info file ##", bold=True))

    hw_version = final["get_device_info"]["hw_ver"]
    sw_version = final["get_device_info"]["fw_ver"]
    model = final["discovery_result"]["device_model"]
    sw_version = sw_version.split(" ", maxsplit=1)[0]

    save_filename = f"{model}_{hw_version}_{sw_version}.json"
    copy_folder = "kasa/tests/fixtures/smart/"
    return save_filename, copy_folder, final


if __name__ == "__main__":
    cli()