/*************************************************************************/
/*  texture_merger.cpp                                                   */
/*************************************************************************/
/*                         This file is part of:                         */
/*                          PANDEMONIUM ENGINE                           */
/*             https://github.com/Relintai/pandemonium_engine            */
/*************************************************************************/
/* Copyright (c) 2022-present Péter Magyar.                              */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "texture_merger.h"

bool TextureMerger::get_dirty() const {
	return _dirty;
}
void TextureMerger::set_dirty(const bool value) {
	_dirty = value;

	if (!_automatic_merge || Engine::get_singleton()->is_editor_hint())
		return;

	if (_dirty)
		set_process(true);
}

int TextureMerger::get_texture_flags() const {
	return _packer->get_texture_flags();
}
void TextureMerger::set_texture_flags(const int flags) {
	_packer->set_texture_flags(flags);
}

int TextureMerger::get_max_atlas_size() const {
	return _packer->get_max_atlas_size();
}
void TextureMerger::set_max_atlas_size(const int size) {
	_packer->set_max_atlas_size(size);
}

bool TextureMerger::get_keep_original_atlases() const {
	return _packer->get_keep_original_atlases();
}
void TextureMerger::set_keep_original_atlases(const bool value) {
	_packer->set_keep_original_atlases(value);
}

Color TextureMerger::get_background_color() const {
	return _packer->get_background_color();
}
void TextureMerger::set_background_color(const Color &color) {
	_packer->set_background_color(color);
}

int TextureMerger::get_margin() const {
	return _packer->get_margin();
}
void TextureMerger::set_margin(const int margin) {
	_packer->set_margin(margin);
}

bool TextureMerger::get_automatic_merge() const {
	return _automatic_merge;
}
void TextureMerger::set_automatic_merge(const bool value) {
	_automatic_merge = value;
}

Ref<TexturePacker> TextureMerger::get_packer() const {
	return _packer;
}
void TextureMerger::set_packer(const Ref<TexturePacker> &packer) {
	_packer = packer;
}

Vector<Variant> TextureMerger::get_textures() {
	Vector<Variant> r;
	for (int i = 0; i < _textures.size(); i++) {
		r.push_back(_textures[i].get_ref_ptr());
	}
	return r;
}
void TextureMerger::set_textures(const Vector<Variant> &textures) {
	bool texture_removed = false;
	for (int i = 0; i < _textures.size(); ++i) {
		if (_packer->unref_texture(_textures.get(i))) {
			texture_removed = true;
		}
	}

	_textures.clear();
	_textures.resize(textures.size());

	for (int i = 0; i < textures.size(); i++) {
		Ref<Texture> texture = Ref<Texture>(textures.get(i));

		_textures.set(i, texture);
	}

	if (Engine::get_singleton()->is_editor_hint())
		return;

	bool texture_added = false;
	for (int i = 0; i < _textures.size(); ++i) {
		Ref<Texture> texture = _textures.get(i);

		if (texture.is_valid() && !_packer->contains_texture(texture)) {
			Ref<AtlasTexture> tex = _packer->add_texture(texture);

			texture_added = true;
		}
	}

	if ((texture_added || texture_removed) && _automatic_merge)
		set_dirty(true);
}

Ref<AtlasTexture> TextureMerger::add_texture(const Ref<Texture> &texture) {
	ERR_FAIL_COND_V(!texture.is_valid(), Ref<AtlasTexture>());

	_textures.push_back(texture);

	bool contains = _packer->contains_texture(texture);

	Ref<AtlasTexture> tex = _packer->add_texture(texture);

	if (!contains) {
		if (has_method("_texture_added")) {
			call("_texture_added", tex);
		}

		emit_signal("texture_added", tex);

		set_dirty(true);
	}

	return tex;
}

Ref<Texture> TextureMerger::get_original_texture(const int index) {
	return _packer->get_original_texture(index);
}

bool TextureMerger::contains_texture(const Ref<Texture> &texture) {
	return _packer->contains_texture(texture);
}

Ref<AtlasTexture> TextureMerger::get_texture(const Ref<Texture> &texture) {
	return _packer->get_texture(texture);
}

Ref<AtlasTexture> TextureMerger::get_texture_index(const int index) {
	return _packer->get_texture_index(index);
}

bool TextureMerger::unref_texture_index(const int index) {
	if (_packer->unref_texture_index(index)) {
		if (has_method("_texture_removed")) {
			call("_texture_removed");
		}

		emit_signal("texture_removed");

		set_dirty(true);

		return true;
	}

	return false;
}

bool TextureMerger::unref_texture(const Ref<Texture> &texture) {
	if (_packer->unref_texture(texture)) {
		if (has_method("_texture_removed")) {
			call("_texture_removed");
		}

		emit_signal("texture_removed");

		set_dirty(true);

		return true;
	}

	return false;
}

void TextureMerger::remove_texture_index(const int index) {
	_packer->remove_texture_index(index);

	if (has_method("_texture_removed")) {
		call("_texture_removed");
	}

	emit_signal("texture_removed");

	set_dirty(true);
}

void TextureMerger::remove_texture(const Ref<Texture> &texture) {
	_packer->remove_texture(texture);

	if (has_method("_texture_removed")) {
		call("_texture_removed");
	}

	emit_signal("texture_removed");

	set_dirty(true);
}

int TextureMerger::get_texture_count() {
	return _packer->get_texture_count();
}

void TextureMerger::clear() {
	_packer->clear();
}

Ref<ImageTexture> TextureMerger::get_generated_texture(const int index) {
	return _packer->get_generated_texture(index);
}
int TextureMerger::get_generated_texture_count() {
	return _packer->get_generated_texture_count();
}

void TextureMerger::merge() {
	_packer->merge();

	if (has_method("_texture_merged")) {
		call("_texture_merged");
	}

	emit_signal("texture_merged");
}

TextureMerger::TextureMerger() {
	_automatic_merge = false;

	_packer.instance();

	_packer->set_keep_original_atlases(false);
}

TextureMerger::~TextureMerger() {
	_packer.unref();
}

void TextureMerger::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_PROCESS: {
			if (!_automatic_merge || Engine::get_singleton()->is_editor_hint())
				return;

			set_process(false);

			if (!_dirty)
				return;

			_dirty = false;

			merge();

		} break;
	}
}

void TextureMerger::_bind_methods() {
	ADD_SIGNAL(MethodInfo("texture_merged"));
	ADD_SIGNAL(MethodInfo("texture_added", PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "AtlasTexture")));
	ADD_SIGNAL(MethodInfo("texture_removed"));

	BIND_VMETHOD(MethodInfo("_texture_merged"));
	BIND_VMETHOD(MethodInfo("_texture_added", PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "AtlasTexture")));
	BIND_VMETHOD(MethodInfo("_texture_removed"));

	ClassDB::bind_method(D_METHOD("get_dirty"), &TextureMerger::get_dirty);
	ClassDB::bind_method(D_METHOD("set_dirty", "value"), &TextureMerger::set_dirty);

	ClassDB::bind_method(D_METHOD("get_texture_flags"), &TextureMerger::get_texture_flags);
	ClassDB::bind_method(D_METHOD("set_texture_flags", "flags"), &TextureMerger::set_texture_flags);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_flags", PROPERTY_HINT_FLAGS, "Mipmaps,Repeat,Filter,Anisotropic Linear,Convert to Linear,Mirrored Repeat,Video Surface"), "set_texture_flags", "get_texture_flags");

	ClassDB::bind_method(D_METHOD("get_max_atlas_size"), &TextureMerger::get_max_atlas_size);
	ClassDB::bind_method(D_METHOD("set_max_atlas_size", "size"), &TextureMerger::set_max_atlas_size);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "max_atlas_size"), "set_max_atlas_size", "get_max_atlas_size");

	ClassDB::bind_method(D_METHOD("get_keep_original_atlases"), &TextureMerger::get_keep_original_atlases);
	ClassDB::bind_method(D_METHOD("set_keep_original_atlases", "value"), &TextureMerger::set_keep_original_atlases);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "keep_original_atlases"), "set_keep_original_atlases", "get_keep_original_atlases");

	ClassDB::bind_method(D_METHOD("get_background_color"), &TextureMerger::get_background_color);
	ClassDB::bind_method(D_METHOD("set_background_color", "color"), &TextureMerger::set_background_color);
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "background_color"), "set_background_color", "get_background_color");

	ClassDB::bind_method(D_METHOD("get_margin"), &TextureMerger::get_margin);
	ClassDB::bind_method(D_METHOD("set_margin", "size"), &TextureMerger::set_margin);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "margin"), "set_margin", "get_margin");

	ClassDB::bind_method(D_METHOD("get_automatic_merge"), &TextureMerger::get_automatic_merge);
	ClassDB::bind_method(D_METHOD("set_automatic_merge", "value"), &TextureMerger::set_automatic_merge);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "automatic_merge"), "set_automatic_merge", "get_automatic_merge");

	ClassDB::bind_method(D_METHOD("get_textures"), &TextureMerger::get_textures);
	ClassDB::bind_method(D_METHOD("set_textures", "textures"), &TextureMerger::set_textures);
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "textures", PROPERTY_HINT_NONE, "23/20:Texture", PROPERTY_USAGE_DEFAULT, "Texture"), "set_textures", "get_textures");

	ClassDB::bind_method(D_METHOD("get_packer"), &TextureMerger::get_packer);
	ClassDB::bind_method(D_METHOD("set_packer", "packer"), &TextureMerger::set_packer);

	ClassDB::bind_method(D_METHOD("add_texture", "texture"), &TextureMerger::add_texture);
	ClassDB::bind_method(D_METHOD("get_texture", "texture"), &TextureMerger::get_texture);
	ClassDB::bind_method(D_METHOD("get_texture_index", "index"), &TextureMerger::get_texture_index);
	ClassDB::bind_method(D_METHOD("get_original_texture", "index"), &TextureMerger::get_original_texture);

	ClassDB::bind_method(D_METHOD("unref_texture_index", "index"), &TextureMerger::unref_texture_index);
	ClassDB::bind_method(D_METHOD("unref_texture", "texture"), &TextureMerger::unref_texture);
	ClassDB::bind_method(D_METHOD("remove_texture_index", "index"), &TextureMerger::remove_texture_index);
	ClassDB::bind_method(D_METHOD("remove_texture", "texture"), &TextureMerger::remove_texture);

	ClassDB::bind_method(D_METHOD("get_texture_count"), &TextureMerger::get_texture_count);
	ClassDB::bind_method(D_METHOD("clear"), &TextureMerger::clear);

	ClassDB::bind_method(D_METHOD("get_generated_texture", "index"), &TextureMerger::get_generated_texture);
	ClassDB::bind_method(D_METHOD("get_generated_texture_count"), &TextureMerger::get_generated_texture_count);

	ClassDB::bind_method(D_METHOD("merge"), &TextureMerger::merge);
}