use hbvm::vm::{
    mem::{Memory, PageSize},
    trap::HandleTrap,
    value::Value,
};

use {
    hbvm::{validate::validate, vm::Vm},
    std::io::{stdin, Read},
};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut prog = vec![];
    stdin().read_to_end(&mut prog)?;

    if let Err(e) = validate(&prog) {
        eprintln!("Program validation error: {e:?}");
        return Ok(());
    } else {
        unsafe {
            let mut vm = Vm::new_unchecked(&prog, TestTrapHandler);
            vm.memory.insert_test_page();
            println!("Program interrupt: {:?}", vm.run());
            println!("{:?}", vm.registers);
        }
    }
    Ok(())
}

pub fn time() -> u32 {
    9
}

struct TestTrapHandler;
impl HandleTrap for TestTrapHandler {
    fn page_fault(&mut self, _: &mut Memory, _: u64, _: PageSize, _: *mut u8) -> bool {
        false
    }

    fn invalid_op(&mut self, _: &mut [Value; 256], _: &mut usize, _: &mut Memory, _: u8) -> bool
    where
        Self: Sized,
    {
        false
    }

    fn ecall(&mut self, _: &mut [Value; 256], _: &mut usize, _: &mut Memory)
    where
        Self: Sized,
    {
    }
}