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// Copyright 2018 MaidSafe.net limited.
//
// This SAFE Network Software is licensed to you under The General Public License (GPL), version 3.
// Unless required by applicable law or agreed to in writing, the SAFE Network Software distributed
// under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. Please review the Licences for the specific language governing
// permissions and limitations relating to use of the SAFE Network Software.

use errors::CoreError;
use futures::sync::mpsc;
use routing::{AccountInfo, ImmutableData, MutableData, PermissionSet, User, Value};
use rust_sodium::crypto::sign;
use std::collections::{BTreeMap, BTreeSet};

/// Network Events will be translated into values starting from this number for
/// propagating them beyond the FFI boudaries when required
pub const NETWORK_EVENT_START_RANGE: i32 = 0;

/// Wraps responses from routing
#[cfg_attr(feature = "cargo-clippy", allow(large_enum_variant))]
#[derive(Debug)]
pub enum CoreEvent {
    /// Result of getting account info
    GetAccountInfo(Result<AccountInfo, CoreError>),
    /// Result of data mutation request
    Mutation(Result<(), CoreError>),
    /// Result of getting `ImmutableData`
    GetIData(Result<ImmutableData, CoreError>),
    /// Result of getting a version of `MutableData`
    GetMDataVersion(Result<u64, CoreError>),
    /// Result of getting a list of `MutableData` entries
    ListMDataEntries(Result<BTreeMap<Vec<u8>, Value>, CoreError>),
    /// Result of getting a list of `MutableData` keys
    ListMDataKeys(Result<BTreeSet<Vec<u8>>, CoreError>),
    /// Result of getting a list of `MutableData` keys
    ListMDataValues(Result<Vec<Value>, CoreError>),
    /// Result of getting a single value from `MutableData`
    GetMDataValue(Result<Value, CoreError>),
    /// Result of getting a list of all `MutableData` permissions
    ListMDataPermissions(Result<BTreeMap<User, PermissionSet>, CoreError>),
    /// Result of getting a list of permissions in `MutableData` for a single user
    ListMDataUserPermissions(Result<PermissionSet, CoreError>),
    /// Result of getting a list of authorised keys
    ListAuthKeysAndVersion(Result<(BTreeSet<sign::PublicKey>, u64), CoreError>),
    /// Result of getting a mutable data shell
    GetMDataShell(Result<MutableData, CoreError>),
    /// Result of getting entire mutable data
    GetMData(Result<MutableData, CoreError>),
    /// Rate limit exeeded
    RateLimitExceeded,
}

/// Network Events that Client Modules need to deal with.
#[derive(Debug)]
pub enum NetworkEvent {
    /// The core engine is connected to atleast one peer
    Connected,
    /// The core engine is disconnected from the network (under usual
    /// circumstances this would indicate that client connection to proxy node
    /// has been lost)
    Disconnected,
}

impl Into<i32> for NetworkEvent {
    fn into(self) -> i32 {
        match self {
            NetworkEvent::Connected => NETWORK_EVENT_START_RANGE,
            NetworkEvent::Disconnected => NETWORK_EVENT_START_RANGE - 1,
        }
    }
}

/// `NetworkEvent` receiver stream.
pub type NetworkRx = mpsc::UnboundedReceiver<NetworkEvent>;
/// `NetworkEvent` transmitter.
pub type NetworkTx = mpsc::UnboundedSender<NetworkEvent>;