use crate::token::Literal;

/// Binary Operator Types. For operations that have two operands
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum BinOpType {
    Add,
    Sub,

    Mul,
    Div,
    Mod
}

/// Unary Operator Types. For operations that have one operand
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum UnOpType {
    Neg
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct FnCall {
    pub fn_name: String,
    pub args: Vec<Expr>,
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Expr {
    Literal(Literal),
    // contains variable name
    Variable(String),
    FnCall(FnCall),
    BinOp(BinOpType, Box<Expr>, Box<Expr>),
    UnOp(UnOpType, Box<Expr>),
}

#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Statement {
    Expr(Expr),
    LetBinding(String, Expr),
    Assignment(String, Expr),
}