// Copyright 2016 The Grin Developers
//
// 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.

extern crate grin_p2p as p2p;
extern crate term;

use api;
use grin::ServerConfig;

pub fn show_status(config: &ServerConfig) {
    println!();
    let title=format!("Grin Server Status ");
    let mut t = term::stdout().unwrap();
    let mut e = term::stdout().unwrap();
    t.fg(term::color::MAGENTA).unwrap();
    writeln!(t, "{}", title).unwrap();
    writeln!(t, "--------------------------").unwrap();
    t.reset().unwrap();
    writeln!(e, "Protocol version: {}", p2p::msg::PROTOCOL_VERSION).unwrap();
    writeln!(e, "User agent: {}", p2p::msg::USER_AGENT).unwrap();
    match get_tip_from_node(config) {
        Ok(tip) => {
            writeln!(e, "Chain height: {}", tip.height).unwrap();
            writeln!(e, "Total difficulty: {}", tip.total_difficulty).unwrap();
            writeln!(e, "Last block pushed: {}", tip.last_block_pushed).unwrap()
        }
        Err(_) => writeln!(e, "WARNING: Client failed to get data. Is your `grin server` offline or broken?").unwrap()
    };
    e.reset().unwrap();
    println!();
}

fn get_tip_from_node(config: &ServerConfig) -> Result<api::Tip, Error> {
	let url = format!("http://{}/v1/chain", config.api_http_addr);
	api::client::get::<api::Tip>(url.as_str()).map_err(|e| Error::API(e))
}

/// Error type wrapping underlying module errors.
#[derive(Debug)]
enum Error {
	/// Error originating from HTTP API calls.
	API(api::Error)
}