pub mod errors;

use errors::{Result, ExecutionError};

use albireo::{Expression, Type, Identifier, Module, Declaration};

// TODO: accepting a module map not a module
pub fn run_program(module: Module) -> Result<()> {
    let main = module.declaration.get(&Identifier { name: "main".into() })
        .ok_or(ExecutionError::MainNotFound)?;

    // expecting main to be function receiving no parameter
    if let Declaration::Variable(_, Type::Function(input, _), _) = main {
        if input.len() != 0 {
            return Err(ExecutionError::MainSignatureIncorrect)
        }
    } else {
        return Err(ExecutionError::MainSignatureIncorrect)
    };

    println!("main {:?}", main);
    Ok(())
}