/*
 *  <Short Description>
 *  Copyright (C) 2024  Brett Terpstra
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef GP_IMAGE_TEST_FUNCTIONS_H
#define GP_IMAGE_TEST_FUNCTIONS_H

// FUNC_DEFINE(NAME, REQUIRED_ARGS, FUNC, ALLOWED_FUNCS)
// FUNC_ALLOW_ANY

#include <initializer_list>
#include <vector>

template<typename T>
using allowed_funcs = std::vector<T>;

class empty {};

#define FUNC_ALLOW_ANY std::vector<empty>();
#define FUNC_ALLOW_NONE std::vector<empty>();

#define FUNC_FUNCTIONS \
    FUNC_DEFINE(RANDOM, 0, void(), allowed_funcs(FUNC_ALLOW_NONE)) \
    FUNC_DEFINE(NOISE, 0, void(), allowed_funcs(FUNC_ALLOW_NONE)) \
    FUNC_DEFINE(COLOR, 0, void(), allowed_funcs(FUNC_ALLOW_NONE)) \
    FUNC_DEFINE(SCALAR, 0, void(), allowed_funcs(FUNC_ALLOW_NONE)) \
    FUNC_DEFINE(ADD, 2, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(SUB, 2, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(MUL, 2, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(DIV, 2, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(EXP, 2, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(LOG, 1, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \
    FUNC_DEFINE(SQRT, 1, void(), allowed_funcs(FUNC_ALLOW_ANY, FUNC_ALLOW_ANY)) \

#undef FUNC_ALLOW_ANY

#define FUNC_DEFINE(NAME, REQUIRED_ARGS, FUNC, ALLOWED) NAME,
enum class function_t
{
    FUNC_FUNCTIONS
};
#undef FUNC_DEFINE

#define FUNC_DEFINE(NAME, REQUIRED_ARGS, FUNC, ALLOWED) function_t::NAME,
static inline allowed_funcs<function_t> FUNC_ALLOW_ANY_LIST{FUNC_FUNCTIONS};
#define FUNC_ALLOW_ANY FUNC_ALLOW_ANY_LIST
#undef FUNC_DEFINE

//enum class function_t
//{
//    // FUNC     // inputs
//    ADD,        // 2
//    SUB,        // 2
//    MUL,        // 2
//    DIV,        // 2
//    EXP,        // 2
//
//    LOG,        // 1
//    SQRT,       // 1
//    QUAD,       // 1
//
//    RANDOM,     // 0
//    NOISE,      // 0
//    COLOR,      // 0
//    SCALAR      // 0
//};

static constexpr int OPERATOR_COUNT = static_cast<int>(function_t::SCALAR) + 1;

#endif //GP_IMAGE_TEST_FUNCTIONS_H