use crate::ir::ir_expression::IrExpression;
use crate::ir::ir_variable::IrVariable;
use std::collections::HashSet;
use std::fmt::{Display, Formatter};
use std::rc::Rc;

pub struct IrCall {
    function_name: Rc<str>,
    arguments: Vec<IrExpression>,
}

impl IrCall {
    pub fn new(function_name: Rc<str>, arguments: Vec<IrExpression>) -> Self {
        Self {
            function_name,
            arguments,
        }
    }

    pub fn uses(&self) -> HashSet<Rc<IrVariable>> {
        let mut set = HashSet::new();
        for argument in &self.arguments {
            set.extend(argument.uses());
        }
        set
    }
}

impl Display for IrCall {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}(", self.function_name)?;
        for (i, argument) in self.arguments.iter().enumerate() {
            write!(f, "{}", argument)?;
            if i < self.arguments.len() - 1 {
                write!(f, ", ")?;
            }
        }
        write!(f, ")")?;
        Ok(())
    }
}