#ifndef _LANGUAGE_HPP
#define _LANGUAGE_HPP

#include <array>
#include <string_view>
#include <algorithm>
#include <string>

namespace Dlang::Language
{
	// --- Single Character Tokens (char) ---
	inline constexpr char op_endl = ';';
	inline constexpr char op_exprstart = '(';
	inline constexpr char op_exprend = ')';
	inline constexpr char op_arraystart = '{';
	inline constexpr char op_arrayend = '}';
	inline constexpr char op_liststart = '[';
	inline constexpr char op_listend = ']';
	inline constexpr char op_equals = '=';
	inline constexpr char op_multi = '*';
	inline constexpr char op_add = '+';
	inline constexpr char op_sub = '-';
	inline constexpr char op_div = '/';
	inline constexpr char op_separator = ',';
	inline constexpr char op_above = '>';
	inline constexpr char op_below = '<';
	inline constexpr char op_colon = ':';
	inline constexpr char op_dot = '.';
	inline constexpr char op_not = '!';
	inline constexpr char op_size = '#';

	inline constexpr std::array single_char_tokens = {
		op_endl, op_exprstart, op_exprend, op_arraystart, op_arrayend,
		op_liststart, op_listend, op_equals, op_multi, op_add, op_sub,
		op_div, op_separator, op_above, op_below, op_colon, op_dot, op_not,
		op_size
	};

	// --- Multi-Character Operators (const char*) ---
	inline constexpr const char* op_eq = "==";
	inline constexpr const char* op_neq = "!=";
	inline constexpr const char* op_gte = ">=";
	inline constexpr const char* op_lte = "<=";
	inline constexpr const char* op_add_assign = "+=";
	inline constexpr const char* op_sub_assign = "-=";
	inline constexpr const char* op_mul_assign = "*=";
	inline constexpr const char* op_div_assign = "/=";
	inline constexpr const char* op_and = "&&";
	inline constexpr const char* op_or = "||";

	// --- Keywords (const char*) ---
	inline constexpr const char* kw_var = "var";
	inline constexpr const char* kw_while = "while";
	inline constexpr const char* kw_do = "do";
	inline constexpr const char* kw_end = "end";
	inline constexpr const char* kw_for = "for";
	inline constexpr const char* kw_foreach = "foreach";
	inline constexpr const char* kw_in = "in";
	inline constexpr const char* kw_if = "if";
	inline constexpr const char* kw_then = "then";
	inline constexpr const char* kw_else = "else";
	inline constexpr const char* kw_func = "func";
	inline constexpr const char* kw_return = "return";
	inline constexpr const char* kw_include = "include";

	inline constexpr std::array<std::string_view, 13> keywords = {
		kw_var, kw_while, kw_do, kw_end, kw_for, kw_foreach,
		kw_in, kw_if, kw_then, kw_else, kw_func, kw_return, kw_include
	};

	// --- Booleans ---
	inline constexpr const char* kw_true = "true";
	inline constexpr const char* kw_false = "false";

	constexpr bool IsSingleCharToken(char c)
	{
		return std::find(single_char_tokens.begin(), single_char_tokens.end(), c) != single_char_tokens.end();
	}

	constexpr bool IsKeyword(std::string_view token)
	{
		return std::find(keywords.begin(), keywords.end(), token) != keywords.end();
	}

	constexpr bool IsBoolean(std::string_view token)
	{
		return token == kw_true || token == kw_false;
	}
}

#endif // _LANGUAGE_HPP