use ferris_gc::{Gc, Trace, Finalize, GcCell, ferris_gc_main, ApplicationCleanup, GcOpt};
use ferris_gc::sync::Gc as GlobalGc;
use ferris_gc::sync::GcCell as GlobalGcCell;
use core::time;
use std::thread;
use std::time::Duration;
use std::path::Path;
use std::fs::File;
use std::error::Error;
use std::io::Write;

#[derive(Trace)]
struct MyStruct {
    jh: u32,
}

impl Drop for MyStruct {
    fn drop(&mut self) {
        println!("MyStruct in drop !!");
    }
}

impl Finalize for MyStruct {
    fn finalize(&self) {
        println!("MyStruct in finalize !!");
        let mut file = File::create("foo.txt");
        match file {
            Ok(mut f) => { f.write_all(b"Hello, world!") },
            Err(e) => { Err(e) },
        };
    }
}

struct MyStruct3 {
    jh: u32,
}

#[derive(Trace, Finalize)]
struct MyStruct39(#[unsafe_ignore_trace] MyStruct3, u16);

#[derive(Trace)]
struct MyStruct2 {
    jh: Gc<u32>,
}

#[derive(Trace, Finalize)]
struct MyStructStd {
    jh: GcOpt<u32>, // The same as Option<Gc<u32>>
    jh2: Box<&'static str>,
    jh3: Option<Box<&'static str>>,
    jh4: GcOpt<Box<&'static str>>, // The same as Option<Gc<Box<&'static str>>>
    jh5: Gc<Option<Box<&'static str>>>,
}

impl Drop for MyStruct2 {
    fn drop(&mut self) {
        println!("MyStruct in drop !!");
    }
}

impl Finalize for MyStruct2 {
    fn finalize(&self) {
        let mut file = File::create("foo2.txt");
        match file {
            Ok(mut f) => { f.write_all(b"Hello, world!") },
            Err(e) => { Err(e) },
        };
    }
}

#[ferris_gc_main]
fn main() {
    {
        let gc = Gc::new(2);
        let gc1 = Gc::new(MyStruct { jh: 3 });
        let gc2 = GcCell::new(MyStruct { jh: 3 });
        gc2.borrow_mut().jh = 2;
        let gc3 = Gc::new(MyStruct2 { jh: gc.clone() });
    }
    {
        let gc1 = Gc::new(MyStruct { jh: 3 });
        let gc2 = GlobalGc::new(MyStruct { jh: 3 });
        thread::spawn(move || {
            println!("gc2.jh is {}", gc2.jh);
        });
    }
    let gc3 = Gc::new(MyStruct { jh: 3 });
    let ten_secs = time::Duration::from_secs(5);
    thread::sleep(ten_secs);
    println!("Hello, GC World !!");
}