#pragma once
#include <llvm/IR/DerivedTypes.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/LLVMContext.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Value.h>
#include <map>

class llvm_context {
    public:
        struct custom_function {
            llvm::Function* function;
            int32_t arity;
        };

        using custom_function_ptr = std::unique_ptr<custom_function>;

    private:
        llvm::LLVMContext ctx;
        llvm::IRBuilder<> builder;
        llvm::Module module;

        std::map<std::string, custom_function_ptr> custom_functions;
        std::map<std::string, llvm::Function*> functions;
        std::map<std::string, llvm::StructType*> struct_types;

        llvm::StructType* stack_type;
        llvm::StructType* gmachine_type;
        llvm::PointerType* stack_ptr_type;
        llvm::PointerType* gmachine_ptr_type;
        llvm::PointerType* node_ptr_type;
        llvm::IntegerType* tag_type;
        llvm::FunctionType* function_type;

        void create_types();
        void create_functions();

    public:
        llvm_context()
            : builder(ctx), module("bloglang", ctx) {
                create_types();
                create_functions();
            }

        llvm::IRBuilder<>& get_builder();
        llvm::Module& get_module();

        llvm::BasicBlock* create_basic_block(const std::string& name, llvm::Function* f);

        llvm::ConstantInt* create_i8(int8_t);
        llvm::ConstantInt* create_i32(int32_t);
        llvm::ConstantInt* create_size(size_t);

        llvm::Value* create_pop(llvm::Function*);
        llvm::Value* create_peek(llvm::Function*, llvm::Value*);
        void create_push(llvm::Function*, llvm::Value*);
        void create_popn(llvm::Function*, llvm::Value*);
        void create_update(llvm::Function*, llvm::Value*);
        void create_pack(llvm::Function*, llvm::Value*, llvm::Value*);
        void create_split(llvm::Function*, llvm::Value*);
        void create_slide(llvm::Function*, llvm::Value*);
        void create_alloc(llvm::Function*, llvm::Value*);
        llvm::Value* create_track(llvm::Function*, llvm::Value*);

        void create_unwind(llvm::Function*);

        llvm::Value* unwrap_gmachine_stack_ptr(llvm::Value*);

        llvm::Value* unwrap_num(llvm::Value*);
        llvm::Value* create_num(llvm::Function*, llvm::Value*);

        llvm::Value* unwrap_data_tag(llvm::Value*);

        llvm::Value* create_global(llvm::Function*, llvm::Value*, llvm::Value*);

        llvm::Value* create_app(llvm::Function*, llvm::Value*, llvm::Value*);

        llvm::Function* create_custom_function(const std::string& name, int32_t arity);
        custom_function& get_custom_function(const std::string& name);
};