#[macro_use]
extern crate log;

use std::collections::HashMap;
use std::sync::Arc;

use clappconfig::{AppConfig, clap};
use clappconfig::clap::ArgMatches;
use serde::{Deserialize, Serialize};

use crsn::asm::data::literal::Addr;
use crsn::runtime::run_thread::{RunThread, ThreadToken};
use crsn_arith::ArithOps;
use crsn_screen::ScreenOps;
use crsn_stacks::StackOps;

mod read_file;

#[derive(Debug, Clone, Serialize, Deserialize)]
struct LogConfig {
    level: String,
    modules: HashMap<String, String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
struct Config {
    log: LogConfig,
    #[serde(skip)]
    program_file: String,
}

impl Default for Config {
    fn default() -> Self {
        Self {
            log: LogConfig {
                level: "info".to_string(),
                modules: Default::default(),
            },
            program_file: "".to_string(),
        }
    }
}

impl AppConfig for Config {
    type Init = Self;

    fn logging(&self) -> &str {
        &self.log.level
    }

    fn logging_mod_levels(&self) -> Option<&HashMap<String, String>> {
        Some(&self.log.modules)
    }

    /// Add args to later use in the `configure` method.
    fn add_args<'a: 'b, 'b>(clap: clap::App<'a, 'b>) -> clap::App<'a, 'b> {
        // Default impl
        clap.arg(
            clap::Arg::with_name("input")
                .value_name("FILE")
                .help("Program to run")
                .required_unless("default-config")
                .takes_value(true),
        )
    }

    fn configure(mut self, clap: &ArgMatches) -> anyhow::Result<Self> {
        self.program_file = clap.value_of("input").unwrap().to_string();
        Ok(self)
    }
}


fn main() -> anyhow::Result<()> {
    let config = Config::init("crsn", "crsn.json5", env!("CARGO_PKG_VERSION"))?;

    info!("Loading {}", config.program_file);

    let source = read_file::read_file(&config.program_file)?;

    let parsers = Arc::new(vec![
        ArithOps::new(),
        StackOps::new(),
        ScreenOps::new(),
    ]);

    let parsed = crsn::asm::assemble(&source, parsers)?;

    info!("Start runtime");

    let thread = RunThread::new(
        ThreadToken(0),
        None,
        parsed.clone(),
        Addr(0), // TODO find "main"?
        &[], // TODO from CLI?
    );

    let a = thread.start();
    // ...
    let _ = a.join();

    info!("Runtime shut down.");

    Ok(())
}