/// AUTOGENERATED COPYRIGHT HEADER START
// Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
// AUTOGENERATED COPYRIGHT HEADER END
#pragma once
#include <list>
#include <memory>
#include <optional>
#include <string>
#include "../lexer.hpp"

// BlitzBasic Built-Ins
// - Include: Followed by a String, which is the file to include at this location.
// - Const: Defines one or more constants, which can not be modified.
// - Local: Defines one or more local variables, which can be modified.
// - Global: Defines one or more global variables, which can be modified from anywhere.
// - Dim: Defines a dynamically resizable array, globally accessible and modifyable.
// - If, Then, ElseIf, EndIf: Your classic If.
// - Select, Case, Default, End Select: Your classic Select.
// - For, To, Step, Next: Your classic For loop.
// - While, Wend: Your classic While loop.
// - Repeat, Until, Forever: Similar to While/Wend, but the condition is at the end and will only loop if the condition is false.
// - Exit: Exit from any currently active loops. I guess this allows leaving Repeat/Forever combinations.
// - True, False: True and False. What, did you expect something else?
// - Stop: Pause the program for the debugger, if there happens to be one.
// - End: Terminate the program.
// - Goto: Jump to a specific label, without setting the return address.
// - Gosub, Return: Jump to a specific label (subroutine), setting the return address appropriately, and Return from it eventually.
// - Function, Return, End Function: Defines a function, and allows returning values. Yes, I know, End itself terminates the program, this is a special case. Thanks younger Sibly.
// - And, Or, Not: Logical operator, self-explanatory really.

namespace blitz {
	namespace ast {
		class expression {
			public:
			virtual ~expression() = default;
		};

		// Values
		class value_expression : public expression {
			protected:
			blitz::token _token;

			public:
			virtual ~value_expression() = default;
			value_expression(blitz::token token);
		};

		class integer_expression : public value_expression {
			protected:
			int32_t _value;

			public:
			virtual ~integer_expression() = default;
			integer_expression(blitz::token token);
		};

		class real_expression : public value_expression {
			protected:
			float _value;

			public:
			virtual ~real_expression() = default;
			real_expression(blitz::token token);
		};

		class string_expression : public value_expression {
			std::string _value;

			public:
			virtual ~string_expression() = default;
			string_expression(blitz::token token);
		};

		/** One or more constant values
		 *
		 * Const var = Value, var2 = value
		 */
		class const_expression : public expression {
			std::list<std::shared_ptr<variable_expression>> _values;

		};

		/** One or more local variables
		 *
		 * Local var, var2 = value, var3
		 */
		class local_expression : public expression {
			std::list<std::shared_ptr<variable_expression>> _values;
		};

		/** One or more global variables
		 *
		 * Local var, var2 = value, var3
		 */
		class global_expression : public expression {
			std::list<std::shared_ptr<variable_expression>> _values;
		};

		/** A variable definition
		 *
		 * 
		 */
		class variable_expression : public expression {
			blitz::token                      _assign;
			std::string                       _name;
			std::shared_ptr<value_expression> _value;

			public:
			virtual ~variable_expression() = default;
			variable_expression(blitz::token token);
		};

	} // namespace ast
} // namespace blitz