#[macro_use]
extern crate clap;
extern crate indicatif;
extern crate console;

use clap::{App, SubCommand};
use indicatif::{ProgressBar};
use console::{style, Emoji};
use std::process::Command;
use std::fs::remove_file;

fn main() {
  let matches = App::new("r2")
      .version(crate_version!())
      .author("Olivia Hugger")
      .about("Test")
      .subcommand(SubCommand::with_name("verify").alias("v"))
      .get_matches();

  println!(r#"                 _   _ _                  "#);
  println!(r#"  _ __ _   _ ___| |_| (_)_ __   __ _ ___  "#);
  println!(r#" | '__| | | / __| __| | | '_ \ / _` / __| "#);
  println!(r#" | |  | |_| \__ \ |_| | | | | | (_| \__ \ "#);
  println!(r#" |_|   \__,_|___/\__|_|_|_| |_|\__, |___/ "#);
  println!(r#"                               |___/      "#);
  println!("");
  
  if let Some(_) = matches.subcommand_matches("verify") {
    compile_only("exercises/ex1.rs");
    compile_only("exercises/ex2.rs");
    compile_only("exercises/ex3.rs");
    compile_only("exercises/ex4.rs");
    compile_only("exercises/ex5.rs");

    compile_only("exercises/variables/variables1.rs");
    compile_only("exercises/variables/variables2.rs");
    compile_only("exercises/variables/variables3.rs");
    compile_only("exercises/variables/variables4.rs");

    compile_only("exercises/functions/functions1.rs");
    compile_only("exercises/functions/functions2.rs");
    compile_only("exercises/functions/functions3.rs");
    compile_only("exercises/functions/functions4.rs");
    compile_only("exercises/functions/functions5.rs");

    compile_only("exercises/primitive_types/primitive_types1.rs");
    compile_only("exercises/primitive_types/primitive_types2.rs");
    compile_only("exercises/primitive_types/primitive_types3.rs");
    compile_only("exercises/primitive_types/primitive_types4.rs");
    compile_only("exercises/primitive_types/primitive_types5.rs");
    compile_only("exercises/primitive_types/primitive_types6.rs");

    test("exercises/tests/tests1.rs");
    test("exercises/tests/tests2.rs");
    test("exercises/tests/tests3.rs");
    test("exercises/tests/tests4.rs");

    test("exercises/if/if1.rs");

    compile_only("exercises/strings/strings1.rs");
    compile_only("exercises/strings/strings2.rs");
    compile_only("exercises/strings/strings3.rs");

    compile_only("exercises/move_semantics/move_semantics1.rs");
    compile_only("exercises/move_semantics/move_semantics2.rs");
    compile_only("exercises/move_semantics/move_semantics3.rs");
    compile_only("exercises/move_semantics/move_semantics4.rs");

    compile_only("exercises/modules/modules1.rs");
    compile_only("exercises/modules/modules2.rs");

    compile_only("exercises/macros/macros1.rs");
    compile_only("exercises/macros/macros2.rs");
    compile_only("exercises/macros/macros3.rs");
    compile_only("exercises/macros/macros4.rs");

    test("exercises/error_handling/errors1.rs");
    test("exercises/error_handling/errors2.rs");
    test("exercises/error_handling/errors3.rs");
    test("exercises/error_handling/errorsn.rs");
    compile_only("exercises/error_handling/option1.rs");
    test("exercises/error_handling/result1.rs");
  }
}

fn compile_only(filename: &str) {
  let bar = ProgressBar::new_spinner();
  bar.set_message(format!("Compiling {}...", filename).as_str());
  bar.enable_steady_tick(100);
  let compilecmd = Command::new("rustc")
                           .args(&[filename, "-o", "temp"])
                           .output()
                           .expect("fail");
  bar.finish_and_clear();
  if compilecmd.status.success() {
    let formatstr = format!("{} Successfully compiled {}!", Emoji("✅", "✓"), filename);
    println!("{}", style(formatstr).green());
    clean().unwrap();
  } else {
    let formatstr = format!("{} Compilation of {} failed! Compiler error message:\n", Emoji("⚠️ ", "!"), filename);
    println!("{}", style(formatstr).red());
    println!("{}", String::from_utf8_lossy(&compilecmd.stderr));
    clean().unwrap();
    std::process::exit(1);
  }
}

fn test(filename: &str) {
  let bar = ProgressBar::new_spinner();
  bar.set_message(format!("Testing {}...", filename).as_str());
  bar.enable_steady_tick(100);
  let testcmd = Command::new("rustc")
                        .args(&["--test", filename, "-o", "temp"])
                        .output()
                        .expect("fail");
  bar.finish_and_clear();
  if testcmd.status.success() {
    let formatstr = format!("{} Successfully tested {}!", Emoji("✅", "✓"), filename);
    println!("{}", style(formatstr).green());
    clean().unwrap();
  } else {
    let formatstr = format!("{} Testing of {} failed! Please try again.", Emoji("⚠️ ", "!"), filename);
    println!("{}", style(formatstr).red());
    clean().unwrap();
    std::process::exit(1);
  }
}

fn clean() -> Result<(), std::io::Error> {
    remove_file("temp")?;
    Ok(())
}