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//! binks is an interpreted dynamically typed embededd scripting language
//! trying to be as simple as python and as clean looking as possible, written 100% in rust
//! 
//! ```no_run
//! # use std::boxed::Box;
//! # use std::error::Error;
//! use binks::preload::*;
//!
//! fn main() -> Result<(), Box<dyn Error>> {
//!     let x = binks::run(r#"
//!         let x = 10
//!         x = x + 1
//!     "#)?.vars["x"].clone();
//!
//!     assert_eq!(x, Int(11));
//!     println!("{:?}", x);
//!    
//!     Ok(())
//! }
//! ```
//! 
//! note that to use binks stdlib when you use it as a crate you will need the [binks github repo](https://github.com/omrihhh/binks) cloned and in your path (hopefuly this wont be the case soon)

/// function struct and its behavier
pub mod functions;
/// imports of binks files and dynamic librarys
pub mod import;
/// the interpreter the Program struct and the Data enum
pub mod interpreter;
/// the tokenizer and Token enum
pub mod lexer;
/// oop items
pub mod oop;
/// Token form expresion to data for every one of the primitives and a whoel expretion 
pub mod vars;

mod utils;

use crossbeam_channel::unbounded;
use std::thread;

/// run the code T where T: Into\<String\> and reurtns the Program that results in it
pub fn run<T>(code: T) -> anyhow::Result<interpreter::line_handeler::Program>
where
    T: Into<String>,
    T: Send,
{
    // initalize the main program
    let mut program = interpreter::line_handeler::Program::new();

    // initalize an unbounded chanle to send the expretions token represenation to the interpreter multythreaddedly 
    let (s, r) = unbounded();

    let code = code.into();

    let tokenizer = thread::spawn(move || {
        lexer::tokenizer::make_tokens(code.replace("\r", "").trim(), s);
    });

    // crate the thread the main program will run in
    let builder = thread::Builder::new()
        .name("binks main".into())
        .stack_size((2.0 * 1024.0 * 1024.0) as usize);

    // build the handeler from the builder above
    let handler = builder
        .spawn(move || {
            for line in r.iter() {
                let line = line;
                match program.handel_line(line.clone()) {
                    Ok(_) => {}
                    Err(err) => {
                        eprintln!("\nerror at line {}:\n{}", program.line, err);
                        break;
                    }
                }
                program.line += line
                    .iter()
                    .filter(|tok| **tok == lexer::token::Token::Semicolon)
                    .count() as i64
                    + 1
                    - line
                        .iter()
                        .filter(|tok| **tok == lexer::token::Token::MinusLineMark)
                        .count() as i64;
            }
            program
        })
        .unwrap();

    // join the program to the main thread and save te program the returned from the handeler thread
    let program = handler.join().unwrap();
    tokenizer.join().unwrap();

    Ok(program)
}

/// contain the mod usful features of the crate for you to not have to import them manualy 
pub mod preload {
    pub use super::interpreter::line_handeler::{Data::*, Program};
    pub use super::oop::oop_items;
}

#[cfg(test)]
mod test {
    use super::run;
    use super::preload::*;
    #[test]
    pub fn simple_math() -> anyhow::Result<()> {
        let p = run("let x = 10 + 2")?;
        assert_eq!(p.vars["x"], Int(12));
        Ok(())
    }

    #[test]
    pub fn objects() -> anyhow::Result<()> {
        let p = run(r#"
            use "binks:IO.binks" as Io

            class Object {
                fn Object(self) {
                    self.data = "Hello World!" 
                }

                fn print_data(self) {
                    Io.print(self.data)
                }
            }

            let o = new Object()
            o.print_data()
        "#)?;

        let mut o = oop_items::Object::new("Object");
        o.fields
            .insert(String::from("data"), Str(String::from("Hello World!")));
        assert_eq!(p.vars["o"], Object(o));
        Ok(())
    }
}