use crate::ir::ir_expression::IrExpression;
use crate::symbol::class_symbol::ClassSymbol;
use crate::symbol::field_symbol::FieldSymbol;
use crate::symbol::function_symbol::FunctionSymbol;
use crate::symbol::parameter_symbol::ParameterSymbol;
use crate::symbol::variable_symbol::VariableSymbol;
use crate::type_info::TypeInfo;
use std::cell::RefCell;
use std::rc::Rc;

pub enum ExpressibleSymbol {
    Class(Rc<RefCell<ClassSymbol>>),
    Field(Rc<RefCell<FieldSymbol>>),
    Function(Rc<RefCell<FunctionSymbol>>),
    Parameter(Rc<RefCell<ParameterSymbol>>),
    Variable(Rc<RefCell<VariableSymbol>>),
}

impl ExpressibleSymbol {
    pub fn type_info(&self) -> TypeInfo {
        match self {
            ExpressibleSymbol::Class(class_symbol) => {
                todo!()
            }
            ExpressibleSymbol::Field(field_symbol) => {
                todo!()
            }
            ExpressibleSymbol::Function(function_symbol) => {
                TypeInfo::Function(function_symbol.clone()) // n.b. not the return type!
            }
            ExpressibleSymbol::Parameter(parameter_symbol) => {
                parameter_symbol.borrow().type_info().clone()
            }
            ExpressibleSymbol::Variable(variable_symbol) => {
                variable_symbol.borrow().type_info().clone()
            }
        }
    }

    pub fn ir_expression(&self) -> IrExpression {
        match self {
            ExpressibleSymbol::Class(class_symbol) => {
                todo!()
            }
            ExpressibleSymbol::Field(field_symbol) => {
                todo!()
            }
            ExpressibleSymbol::Function(_) => {
                panic!("Cannot get ir_variable for FunctionSymbol");
            }
            ExpressibleSymbol::Parameter(parameter_symbol) => {
                IrExpression::Parameter(parameter_symbol.borrow().ir_parameter().clone())
            }
            ExpressibleSymbol::Variable(variable_symbol) => {
                IrExpression::Variable(variable_symbol.borrow().vr_variable().clone())
            }
        }
    }
}