extern crate argparse;
extern crate rust_util;

use argparse::{ArgumentParser, StoreTrue, Store};
use rust_util::*;

const VERSION: &str = "0.1";

fn print_version() {
    print!(r#"finding {}
Copyright (C) 2019 Hatter Jiang.
License MIT <https://opensource.org/licenses/MIT>

Written by Hatter Jiang
"#, VERSION);
}

// ---------------------------------------------------------------------------------------------------------

fn main() {
    let mut version = false;
    let mut target = String::from("text");
    let mut huge_file_size = String::from("100M");
    let mut dir = String::from(".");
    {
        let mut ap = ArgumentParser::new();
        ap.set_description("finding - command line find tool.");
        ap.refer(&mut target).add_option(&["-t", "--target"], Store, "Target, text, huge[file], default text");
        ap.refer(&mut huge_file_size).add_option(&["--huge-file"], Store, "Huge file size, default 100M");
        ap.refer(&mut version).add_option(&["-v", "--version"], StoreTrue, "Print version");
        ap.refer(&mut dir).add_argument("DIR", Store, "Dir name, default current dir(.)");
        ap.parse_args_or_exit();
    }
    
    if version {
        print_version();
        return;
    }

    let dir_path = match get_absolute_path(&dir) {
        None => {
            print_message(MessageType::ERROR, &format!("Cannot find dir: {}", dir));
            return;
        },
        Some(path) => path,
    };
    match target.as_str() {
        "huge" | "hugefile" => {
            let huge_file_size_bytes = match parse_size(&huge_file_size) {
                Err(err) => {
                    print_message(MessageType::ERROR, &format!("Parse size failed: {}", err));
                    return;
                },
                Ok(bytes) => bytes as u64,
            };
            walk_dir(&dir_path, &|_, _| () /* do not process error */, &|p| {
                match p.metadata() {
                    Err(_) => (),
                    Ok(metadata) => {
                        let len = metadata.len();
                        if len >= huge_file_size_bytes {
                            match p.to_str() {
                                None => (),
                                Some(p_str) => {
                                    print_lastline("");
                                    print_message(MessageType::OK, &format!("{} [{}]", p_str, get_display_size(len as i64)));
                                },
                            }
                        }
                    },
                }
            }, &|p| {
                match p.to_str() {
                    None => (),
                    Some(p_str) => print_lastline(&format!("Scanning: {}", p_str)),
                }
                true
            }).unwrap_or(());
            print_lastline("");
            return;
        },
        _ => (),
    }

    // --------------------------------------------------------------------------------------------------------
    println!("{:?}", get_home_path());
    println!("{:?}", get_absolute_path("."));
    println!("{:?}", get_absolute_path("../"));
    println!("{:?}", get_absolute_path("~"));
    println!("{:?}", get_absolute_path("~/.jssp"));
    println!("{:?}", get_absolute_path("~/.jsspx"));


    walk_dir(get_home_path().unwrap().as_path(), &|_, _| (), &|p| println!("{:?}",p), &|_| false).unwrap();

    println!("Hello, world!");
}