use std::time::Duration;
use clap::{ArgMatches, SubCommand, App, Arg};
use crates_io_api::{SyncClient, CrateResponse};
use crate::cmd::{Command, CommandError};

pub struct CommandImpl;

impl Command for CommandImpl {

    fn name(&self) -> &str { "crate" }

    fn subcommand<'a>(&self) -> App<'a, 'a> {
        SubCommand::with_name(self.name()).about("Crate subcommand")
        .arg(Arg::with_name("add").short("A").long("add").multiple(true).takes_value(true).help("Add crates to project"))
    }

    fn run(&self, _arg_matches: &ArgMatches, sub_arg_matches: &ArgMatches) -> CommandError {
        let crate_io_client = SyncClient::new(
            "cargotool (https://hatter.me/)", Duration::from_millis(1000)
        )?;

        if let Some(add_crates) = sub_arg_matches.values_of("add") {
            for c in add_crates {
                find_create(&crate_io_client, c);
            }
        }

        Ok(())
    }
}

fn find_create(crate_io_client: &SyncClient, crate_name: &str) -> Option<CrateResponse> {
    let c = match crate_io_client.get_crate(crate_name) {
        Ok(c) => c, Err(e) => {
            failure!("Crate not found or network error: {}", e);
            return None;
        },
    };
    let crate_data = &c.crate_data;
    if crate_data.id != crate_name {
        failure!("Crate not found: {}", crate_name);
        return None;
    }
    if crate_data.downloads < 1000 {
        failure!("Crate: {}, downloaded less then 1,000, is: {}, max version: {}", crate_name, crate_data.downloads, crate_data.max_version);
    } else if crate_data.downloads < 10000 {
        warning!("Crate: {}, downloaded less then 10,000, is: {}, max version: {}", crate_name, crate_data.downloads, crate_data.max_version);
    } else {
        success!("Crate: {}, downloaded more then 10,000, is: {}, max version: {}", crate_name, crate_data.downloads, crate_data.max_version);
    }
    Some(c)
}