use crate::mapping::*;
use crate::remapper::*;
use anyhow::*;
use std::path::PathBuf;
use std::time::Duration;
use structopt::StructOpt;

mod deviceinfo;
mod mapping;
mod remapper;

#[derive(Debug, StructOpt)]
#[structopt(
    name = "evremap",
    about = "Remap libinput evdev keyboard inputs",
    author = "Wez Furlong"
)]
enum Opt {
    /// Rather than running the remapper, list currently available devices.
    /// This is helpful to check their names when setting up the initial
    /// configuration
    ListDevices,

    /// Show a list of possible KEY_XXX values
    ListKeys,

    /// Load a remapper config and run the remapper.
    /// This usually requires running as root to obtain exclusive access
    /// to the input devices.
    Remap {
        /// Specify the configuration file to be loaded
        #[structopt(name = "CONFIG-FILE")]
        config_file: PathBuf,
    },
}

pub fn list_keys() -> Result<()> {
    let mut keys: Vec<String> = EventCode::EV_KEY(KeyCode::KEY_RESERVED)
        .iter()
        .filter_map(|code| match code {
            EventCode::EV_KEY(_) => Some(format!("{}", code)),
            _ => None,
        })
        .collect();
    keys.sort();
    for key in keys {
        println!("{}", key);
    }
    Ok(())
}

fn main() -> Result<()> {
    pretty_env_logger::init();
    let opt = Opt::from_args();

    match opt {
        Opt::ListDevices => deviceinfo::list_devices(),
        Opt::ListKeys => list_keys(),
        Opt::Remap { config_file } => {
            let mapping_config = MappingConfig::from_file(&config_file).context(format!(
                "loading MappingConfig from {}",
                config_file.display()
            ))?;

            log::error!("Short delay: release any keys now!");
            std::thread::sleep(Duration::new(2, 0));

            let device_info = deviceinfo::DeviceInfo::with_name(&mapping_config.device_name)?;

            let mut mapper = InputMapper::create_mapper(device_info.path, mapping_config.mappings)?;
            mapper.run_mapper()
        }
    }
}