// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use crate::input_report::facade::InputReportFacade;
use crate::input_report::types::{
    InputDeviceMatchArgs, InputReportMethod, SerializableFeatureReport,
};
use crate::server::Facade;
use anyhow::Error;
use async_trait::async_trait;
use serde::de::Deserialize;
use serde_json::{to_value, Value};
use std::convert::TryInto;
use std::str::FromStr;

#[async_trait(?Send)]
impl Facade for InputReportFacade {
    async fn handle_request(&self, method: String, args: Value) -> Result<Value, Error> {
        let match_args = InputDeviceMatchArgs::from(&args);
        match InputReportMethod::from_str(&method).unwrap() {
            InputReportMethod::GetReports => Ok(to_value(self.get_reports(match_args).await?)?),
            InputReportMethod::GetDescriptor => {
                Ok(to_value(self.get_descriptor(match_args).await?)?)
            }
            InputReportMethod::GetFeatureReport => {
                Ok(to_value(self.get_feature_report(match_args).await?)?)
            }
            InputReportMethod::SetFeatureReport => Ok(to_value({
                let report_value =
                    args.get("feature_report").ok_or(anyhow!("No FeatureReport provided"))?;
                let report = SerializableFeatureReport::deserialize(report_value)?.try_into()?;
                self.set_feature_report(match_args, report).await?
            })?),
            // TODO(bradenkell): Add SendOutputReport if it ends up being needed.
            _ => bail!("Invalid InputReport FIDL method: {:?}", method),
        }
    }
}