// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.

// Parity Ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity Ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.

use cli::Args;
use std::fmt;

#[derive(Debug, PartialEq)]
pub enum Deprecated {
    DoesNothing(&'static str),
    Replaced(&'static str, &'static str),
    Removed(&'static str),
}

impl fmt::Display for Deprecated {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        match *self {
            Deprecated::DoesNothing(s) => {
                write!(f, "Option '{}' does nothing. It's on by default.", s)
            }
            Deprecated::Replaced(old, new) => write!(
                f,
                "Option '{}' is deprecated. Please use '{}' instead.",
                old, new
            ),
            Deprecated::Removed(s) => write!(
                f,
                "Option '{}' has been removed and is no longer supported.",
                s
            ),
        }
    }
}

pub fn find_deprecated(args: &Args) -> Vec<Deprecated> {
    let mut result = vec![];

    // Removed in 1.6 or before.

    if args.flag_warp {
        result.push(Deprecated::DoesNothing("--warp"));
    }

    if args.flag_jsonrpc {
        result.push(Deprecated::DoesNothing("--jsonrpc"));
    }

    if args.flag_rpc {
        result.push(Deprecated::DoesNothing("--rpc"));
    }

    if args.flag_jsonrpc_off {
        result.push(Deprecated::Replaced("--jsonrpc-off", "--no-jsonrpc"));
    }

    if args.flag_webapp {
        result.push(Deprecated::DoesNothing("--webapp"));
    }

    if args.flag_dapps_off {
        result.push(Deprecated::Replaced("--dapps-off", "--no-dapps"));
    }

    if args.flag_ipcdisable {
        result.push(Deprecated::Replaced("--ipcdisable", "--no-ipc"));
    }

    if args.flag_ipc_off {
        result.push(Deprecated::Replaced("--ipc-off", "--no-ipc"));
    }

    if args.arg_etherbase.is_some() {
        result.push(Deprecated::Replaced("--etherbase", "--author"));
    }

    if args.arg_extradata.is_some() {
        result.push(Deprecated::Replaced("--extradata", "--extra-data"));
    }

    if args.flag_testnet {
        result.push(Deprecated::Replaced("--testnet", "--chain testnet"));
    }

    if args.flag_nodiscover {
        result.push(Deprecated::Replaced("--nodiscover", "--no-discovery"));
    }

    if args.arg_datadir.is_some() {
        result.push(Deprecated::Replaced("--datadir", "--base-path"));
    }

    if args.arg_networkid.is_some() {
        result.push(Deprecated::Replaced("--networkid", "--network-id"));
    }

    if args.arg_peers.is_some() {
        result.push(Deprecated::Replaced("--peers", "--min-peers"));
    }

    if args.arg_nodekey.is_some() {
        result.push(Deprecated::Replaced("--nodekey", "--node-key"));
    }

    if args.arg_rpcaddr.is_some() {
        result.push(Deprecated::Replaced("--rpcaddr", "--jsonrpc-interface"));
    }

    if args.arg_rpcport.is_some() {
        result.push(Deprecated::Replaced("--rpcport", "--jsonrpc-port"));
    }

    if args.arg_rpcapi.is_some() {
        result.push(Deprecated::Replaced("--rpcapi", "--jsonrpc-api"));
    }

    if args.arg_rpccorsdomain.is_some() {
        result.push(Deprecated::Replaced("--rpccorsdomain", "--jsonrpc-cors"));
    }

    if args.arg_ipcapi.is_some() {
        result.push(Deprecated::Replaced("--ipcapi", "--ipc-apis"));
    }

    if args.arg_ipcpath.is_some() {
        result.push(Deprecated::Replaced("--ipcpath", "--ipc-path"));
    }

    if args.arg_gasprice.is_some() {
        result.push(Deprecated::Replaced("--gasprice", "--min-gas-price"));
    }

    if args.arg_cache.is_some() {
        result.push(Deprecated::Replaced("--cache", "--cache-size"));
    }

    // Removed in 1.7.

    if args.arg_dapps_port.is_some() {
        result.push(Deprecated::Removed("--dapps-port"));
    }

    if args.arg_dapps_interface.is_some() {
        result.push(Deprecated::Removed("--dapps-interface"));
    }

    if args.arg_dapps_hosts.is_some() {
        result.push(Deprecated::Removed("--dapps-hosts"));
    }

    if args.arg_dapps_cors.is_some() {
        result.push(Deprecated::Removed("--dapps-cors"));
    }

    if args.arg_dapps_user.is_some() {
        result.push(Deprecated::Removed("--dapps-user"));
    }

    if args.arg_dapps_pass.is_some() {
        result.push(Deprecated::Removed("--dapps-pass"));
    }

    if args.flag_dapps_apis_all {
        result.push(Deprecated::Replaced("--dapps-apis-all", "--jsonrpc-apis"));
    }

    // Removed in 1.11.

    if args.flag_public_node {
        result.push(Deprecated::Removed("--public-node"));
    }

    if args.flag_force_ui {
        result.push(Deprecated::Removed("--force-ui"));
    }

    if args.flag_no_ui {
        result.push(Deprecated::Removed("--no-ui"));
    }

    if args.flag_ui_no_validation {
        result.push(Deprecated::Removed("--ui-no-validation"));
    }

    if args.arg_ui_interface.is_some() {
        result.push(Deprecated::Removed("--ui-interface"));
    }

    if args.arg_ui_hosts.is_some() {
        result.push(Deprecated::Removed("--ui-hosts"));
    }

    if args.arg_ui_port.is_some() {
        result.push(Deprecated::Removed("--ui-port"));
    }

    if args.arg_tx_queue_ban_count.is_some() {
        result.push(Deprecated::Removed("--tx-queue-ban-count"));
    }

    if args.arg_tx_queue_ban_time.is_some() {
        result.push(Deprecated::Removed("--tx-queue-ban-time"));
    }

    // Removed in 2.0.

    if args.flag_fast_and_loose {
        result.push(Deprecated::Removed("--fast-and-loose"));
    }

    if args.cmd_dapp {
        result.push(Deprecated::Removed("parity dapp"));
    }

    if args.arg_dapp_path.is_some() {
        result.push(Deprecated::Removed("--dapp-path"));
    }

    if args.flag_no_dapps {
        result.push(Deprecated::Removed("--no-dapps"));
    }

    if args.arg_dapps_path.is_some() {
        result.push(Deprecated::Removed("--dapps-path"));
    }

    if args.arg_ntp_servers.is_some() {
        result.push(Deprecated::Removed("--ntp-servers"));
    }

    result
}

#[cfg(test)]
mod tests {
    use super::{find_deprecated, Deprecated};
    use cli::Args;

    #[test]
    fn test_find_deprecated() {
        assert_eq!(find_deprecated(&Args::default()), vec![]);
        assert_eq!(
            find_deprecated(&{
                let mut args = Args::default();
                args.flag_warp = true;
                args.flag_jsonrpc = true;
                args.flag_rpc = true;
                args.flag_jsonrpc_off = true;
                args.flag_webapp = true;
                args.flag_dapps_off = true;
                args.flag_ipcdisable = true;
                args.flag_ipc_off = true;
                args.arg_etherbase = Some(Default::default());
                args.arg_extradata = Some(Default::default());
                args.arg_dapps_port = Some(Default::default());
                args.arg_dapps_interface = Some(Default::default());
                args.arg_dapps_hosts = Some(Default::default());
                args.arg_dapps_cors = Some(Default::default());
                args.arg_dapps_user = Some(Default::default());
                args.arg_dapps_pass = Some(Default::default());
                args.flag_dapps_apis_all = true;
                args.flag_fast_and_loose = true;
                args.arg_ntp_servers = Some(Default::default());
                args
            }),
            vec![
                Deprecated::DoesNothing("--warp"),
                Deprecated::DoesNothing("--jsonrpc"),
                Deprecated::DoesNothing("--rpc"),
                Deprecated::Replaced("--jsonrpc-off", "--no-jsonrpc"),
                Deprecated::DoesNothing("--webapp"),
                Deprecated::Replaced("--dapps-off", "--no-dapps"),
                Deprecated::Replaced("--ipcdisable", "--no-ipc"),
                Deprecated::Replaced("--ipc-off", "--no-ipc"),
                Deprecated::Replaced("--etherbase", "--author"),
                Deprecated::Replaced("--extradata", "--extra-data"),
                Deprecated::Removed("--dapps-port"),
                Deprecated::Removed("--dapps-interface"),
                Deprecated::Removed("--dapps-hosts"),
                Deprecated::Removed("--dapps-cors"),
                Deprecated::Removed("--dapps-user"),
                Deprecated::Removed("--dapps-pass"),
                Deprecated::Replaced("--dapps-apis-all", "--jsonrpc-apis"),
                Deprecated::Removed("--fast-and-loose"),
                Deprecated::Removed("--ntp-servers"),
            ]
        );
    }
}