use std::collections::HashMap;

use inkwell::{builder::Builder, context::Context, module::Module, values::{FunctionValue, PointerValue}};

use crate::code_generation::Function;

pub struct Compiler<'a, 'ctx> {
    pub context: &'ctx Context,
    pub builder: &'a Builder<'ctx>,
    pub module: &'a Module<'ctx>,
    pub function: &'a Function,

    variables: HashMap<String, PointerValue<'ctx>>,
    fn_value_opt: Option<FunctionValue<'ctx>>
}

impl<'a, 'ctx> Compiler<'a, 'ctx> {
    /// Gets a defined function given its name.
    #[inline]
    fn get_function(&self, name: &str) -> Option<FunctionValue<'ctx>> {
        self.module.get_function(name)
    }
    
    /// Returns the `FunctionValue` representing the function being compiled.
    #[inline]
    fn fn_value(&self) -> FunctionValue<'ctx> {
        self.fn_value_opt.unwrap()
    }
}