#ifndef FORSPLL_AST_HPP
#define FORSPLL_AST_HPP

#include "llvm.hpp"
#include "var.hpp"

#include <list>
#include <memory>
#include <string>

struct BaseAST
{
    std::string name;

    BaseAST(const std::string& n): name(n) {}

    virtual ~BaseAST() = default;
    virtual llvm::Value *codegen(LLVMState&) const = 0;
};

struct NumberAST : public BaseAST
{
    // push number onto stack
    explicit NumberAST(const std::string& n);
    llvm::Value *codegen(LLVMState& llvmState) const override;
};

struct PushAST : public BaseAST
{
    // push named value to stack
    explicit PushAST(const std::string& n);
    llvm::Value *codegen(LLVMState& llvmState) const override;
};

struct PopAST : public BaseAST
{
    // pop value on stack to named var
    explicit PopAST(const std::string& n);
    llvm::Value *codegen(LLVMState& llvmState) const override;
};

struct CallAST : public BaseAST
{
    // invoke named invocable
    explicit CallAST(const std::string& n);
    llvm::Value *codegen(LLVMState& llvmState) const override;
};

struct ThunkAST : public BaseAST
{
    static int tcount;

    std::list<std::unique_ptr<BaseAST>> body;
    llvm::IRBuilderBase::InsertPoint parent;
    llvm::Function *func;

    explicit ThunkAST(LLVMState& llvmState);
    explicit ThunkAST(LLVMState& llvmState, std::string n);
    llvm::Value *codegen(LLVMState& llvmState) const override;
};

#endif // FORSPLL_AST_HPP