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//
// Copyright (C) 2018 Kubos Corporation
//
// 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.
//
// Contributed by: William Greer (wgreer184@gmail.com) and Sam Justice (sam.justice1@gmail.com)
//

use crate::errors::*;
use std::sync::{Arc, Mutex};

/// Generic telemetry collected by the communication service.
#[derive(Default, GraphQLObject)]
pub struct CommsTelemetry {
    /// Errors that have occured within the communication service.
    pub errors: Vec<String>,
    /// Number of bad uplink packets.
    pub failed_packets_up: i32,
    /// Number of bad downlink packets.
    pub failed_packets_down: i32,
    /// Number of packets successfully uplinked.
    pub packets_up: i32,
    /// Number of packets successfully downlinked.
    pub packets_down: i32,
}

/// Enum used to differentiate types of telemetry collected by the communication service.
pub enum TelemType {
    /// Packets down
    Down,
    /// Packets down that failed
    DownFailed,
    /// Packets up
    Up,
    /// Packets up that failed
    UpFailed,
}

// Function used to obtain a mutex lock and update communication service errors.
pub fn log_error(data: &Arc<Mutex<CommsTelemetry>>, error: String) -> CommsResult<()> {
    match data.lock() {
        Ok(mut telem) => {
            telem.errors.push(error);
            Ok(())
        }
        Err(_) => Err(CommsServiceError::MutexPoisoned.into()),
    }
}

// Function used to obtain a mutex lock and update communcation service telemetry.
pub fn log_telemetry(data: &Arc<Mutex<CommsTelemetry>>, telem_type: &TelemType) -> CommsResult<()> {
    match data.lock() {
        Ok(mut telem) => {
            match telem_type {
                TelemType::Down => telem.packets_down += 1,
                TelemType::DownFailed => telem.failed_packets_down += 1,
                TelemType::Up => telem.packets_up += 1,
                TelemType::UpFailed => telem.failed_packets_up += 1,
            };
            Ok(())
        }
        Err(_) => Err(CommsServiceError::MutexPoisoned.into()),
    }
}