// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Host-side types

use crate::wrapper::transport::{Sink, Source};
use pyo3::{intern, prelude::PyModule, types::PyDict, PyObject, PyResult, Python};

/// Host HCI commands
pub struct Host {
    pub(crate) obj: PyObject,
}

impl Host {
    /// Create a Host that wraps the provided obj
    pub(crate) fn from(obj: PyObject) -> Self {
        Self { obj }
    }

    /// Create a new Host
    pub fn new(source: Source, sink: Sink) -> PyResult<Self> {
        Python::with_gil(|py| {
            PyModule::import(py, intern!(py, "bumble.host"))?
                .getattr(intern!(py, "Host"))?
                .call((source.0, sink.0), None)
                .map(|any| Self { obj: any.into() })
        })
    }

    /// Send a reset command and perform other reset tasks.
    pub async fn reset(&mut self, driver_factory: DriverFactory) -> PyResult<()> {
        Python::with_gil(|py| {
            let kwargs = match driver_factory {
                DriverFactory::None => {
                    let kw = PyDict::new(py);
                    kw.set_item("driver_factory", py.None())?;
                    Some(kw)
                }
                DriverFactory::Auto => {
                    // leave the default in place
                    None
                }
            };
            self.obj
                .call_method(py, intern!(py, "reset"), (), kwargs)
                .and_then(|coroutine| pyo3_asyncio::tokio::into_future(coroutine.as_ref(py)))
        })?
        .await
        .map(|_| ())
    }
}

/// Driver factory to use when initializing a host
#[derive(Debug, Clone)]
pub enum DriverFactory {
    /// Do not load drivers
    None,
    /// Load appropriate driver, if any is found
    Auto,
}