/******************************************************************************
 * This program simply writes characters from the alphabet to a file.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#![allow(dead_code)]
#![allow(non_snake_case)]
#![allow(non_upper_case_globals)]
#[macro_use]
mod utils;
use std::env;
use std::fs::{File};
use std::io::{BufWriter, Write};
use std::process::{self};

fn write_text_file(filespec:&str) -> Result<(), utils::CustomError> {
	let mut ofh:BufWriter<File> = BufWriter::new(File::create(filespec)?);
// Latin alphabet
	{
		let mut c:u32 = 0x41;
		while c <= 0x5A {
			utils::put_codepoint(&mut ofh, c);
			c += 1;
		}
	}
	write!(ofh, "{}", '\n')?;
// Greek alphabet
	{
		let mut c:u32 = 0x391;
		while c <= 0x3A9 {
			utils::put_codepoint(&mut ofh, c);
			c += 1;
		}
	}
	write!(ofh, "{}", '\n')?;
// Cyrillic alphabet
	{
		let mut c:u32 = 0x410;
		while c <= 0x42F {
			utils::put_codepoint(&mut ofh, c);
			c += 1;
		}
	}
	write!(ofh, "{}", '\n')?;
// Katakana alphabet
	{
		let mut c:u32 = 0x30A0;
		while c <= 0x30FF {
			utils::put_codepoint(&mut ofh, c);
			c += 1;
		}
	}
	write!(ofh, "{}", '\n')?;
	ofh.flush()?;
	return Ok(());
}

fn main() {
	let args: Vec<String> = env::args().collect();
	if args.len() != 2 {
		println!("Syntax: FileIO4 {{filename}}");
		process::exit(1);
	}
	let filespec:String = args[1].to_string();
	match (|| -> Result<(), utils::CustomError>{
		write_text_file(&filespec)?;
		return Ok(());
	})() {
		Ok(()) => {},
		Err(ex) => {
			match ex {
				utils::CustomError::IOError(ex) => {
					println!("Error: {}", format!("{}", ex));
				}
				_ => {
					println!("Unexpected File Read Error");
				}
			}
		}
	};
}