// Copyright 2019 The Tari Project
//
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
// following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
// disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
// following disclaimer in the documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
// products derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use std::{fmt, fmt::Formatter};

use tari_common_types::types::HashOutput;
use tari_transaction_components::rpc::models::FeePerGramStat;

use crate::{
    common::RequestKey,
    mempool::{StateResponse, StatsResponse, TxStorageResponse},
};

/// API Response enum for Mempool responses.
#[derive(Clone, Debug)]
pub enum MempoolResponse {
    Stats(StatsResponse),
    State(StateResponse),
    TxStorage(TxStorageResponse),
    FeePerGramStats { response: Vec<FeePerGramStat> },
    FilteredOutputs(Vec<HashOutput>),
}

impl fmt::Display for MempoolResponse {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        use MempoolResponse::{FeePerGramStats, FilteredOutputs, State, Stats, TxStorage};
        match &self {
            Stats(_) => write!(f, "Stats"),
            State(_) => write!(f, "State"),
            TxStorage(_) => write!(f, "TxStorage"),
            FeePerGramStats { response } => write!(f, "FeePerGramStats({} item(s))", response.len()),
            FilteredOutputs(outputs) => write!(f, "FilteredOutputs({} item(s))", outputs.len()),
        }
    }
}

/// Response type for a received MempoolService requests
#[derive(Clone, Debug)]
pub struct MempoolServiceResponse {
    pub request_key: RequestKey,
    pub response: MempoolResponse,
}
