/**************************************************************************/
/*  gltf_accessor.cpp                                                     */
/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "gltf_accessor.h"
#include "gltf_accessor.compat.inc"

#include "../gltf_state.h"

void GLTFAccessor::_bind_methods() {
	BIND_ENUM_CONSTANT(TYPE_SCALAR);
	BIND_ENUM_CONSTANT(TYPE_VEC2);
	BIND_ENUM_CONSTANT(TYPE_VEC3);
	BIND_ENUM_CONSTANT(TYPE_VEC4);
	BIND_ENUM_CONSTANT(TYPE_MAT2);
	BIND_ENUM_CONSTANT(TYPE_MAT3);
	BIND_ENUM_CONSTANT(TYPE_MAT4);

	BIND_ENUM_CONSTANT(COMPONENT_TYPE_NONE);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_BYTE);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_BYTE);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_SHORT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_SHORT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_INT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_INT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_SINGLE_FLOAT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_DOUBLE_FLOAT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_HALF_FLOAT);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_LONG);
	BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_LONG);

	ClassDB::bind_static_method("GLTFAccessor", D_METHOD("from_dictionary", "dictionary"), &GLTFAccessor::from_dictionary);
	ClassDB::bind_method(D_METHOD("to_dictionary"), &GLTFAccessor::to_dictionary);

	ClassDB::bind_method(D_METHOD("get_buffer_view"), &GLTFAccessor::get_buffer_view);
	ClassDB::bind_method(D_METHOD("set_buffer_view", "buffer_view"), &GLTFAccessor::set_buffer_view);
	ClassDB::bind_method(D_METHOD("get_byte_offset"), &GLTFAccessor::get_byte_offset);
	ClassDB::bind_method(D_METHOD("set_byte_offset", "byte_offset"), &GLTFAccessor::set_byte_offset);
	ClassDB::bind_method(D_METHOD("get_component_type"), &GLTFAccessor::get_component_type);
	ClassDB::bind_method(D_METHOD("set_component_type", "component_type"), &GLTFAccessor::set_component_type);
	ClassDB::bind_method(D_METHOD("get_normalized"), &GLTFAccessor::get_normalized);
	ClassDB::bind_method(D_METHOD("set_normalized", "normalized"), &GLTFAccessor::set_normalized);
	ClassDB::bind_method(D_METHOD("get_count"), &GLTFAccessor::get_count);
	ClassDB::bind_method(D_METHOD("set_count", "count"), &GLTFAccessor::set_count);
	ClassDB::bind_method(D_METHOD("get_accessor_type"), &GLTFAccessor::get_accessor_type);
	ClassDB::bind_method(D_METHOD("set_accessor_type", "accessor_type"), &GLTFAccessor::set_accessor_type);
	ClassDB::bind_method(D_METHOD("get_type"), &GLTFAccessor::get_type);
	ClassDB::bind_method(D_METHOD("set_type", "type"), &GLTFAccessor::set_type);
	ClassDB::bind_method(D_METHOD("get_min"), &GLTFAccessor::get_min);
	ClassDB::bind_method(D_METHOD("set_min", "min"), &GLTFAccessor::set_min);
	ClassDB::bind_method(D_METHOD("get_max"), &GLTFAccessor::get_max);
	ClassDB::bind_method(D_METHOD("set_max", "max"), &GLTFAccessor::set_max);
	ClassDB::bind_method(D_METHOD("get_sparse_count"), &GLTFAccessor::get_sparse_count);
	ClassDB::bind_method(D_METHOD("set_sparse_count", "sparse_count"), &GLTFAccessor::set_sparse_count);
	ClassDB::bind_method(D_METHOD("get_sparse_indices_buffer_view"), &GLTFAccessor::get_sparse_indices_buffer_view);
	ClassDB::bind_method(D_METHOD("set_sparse_indices_buffer_view", "sparse_indices_buffer_view"), &GLTFAccessor::set_sparse_indices_buffer_view);
	ClassDB::bind_method(D_METHOD("get_sparse_indices_byte_offset"), &GLTFAccessor::get_sparse_indices_byte_offset);
	ClassDB::bind_method(D_METHOD("set_sparse_indices_byte_offset", "sparse_indices_byte_offset"), &GLTFAccessor::set_sparse_indices_byte_offset);
	ClassDB::bind_method(D_METHOD("get_sparse_indices_component_type"), &GLTFAccessor::get_sparse_indices_component_type);
	ClassDB::bind_method(D_METHOD("set_sparse_indices_component_type", "sparse_indices_component_type"), &GLTFAccessor::set_sparse_indices_component_type);
	ClassDB::bind_method(D_METHOD("get_sparse_values_buffer_view"), &GLTFAccessor::get_sparse_values_buffer_view);
	ClassDB::bind_method(D_METHOD("set_sparse_values_buffer_view", "sparse_values_buffer_view"), &GLTFAccessor::set_sparse_values_buffer_view);
	ClassDB::bind_method(D_METHOD("get_sparse_values_byte_offset"), &GLTFAccessor::get_sparse_values_byte_offset);
	ClassDB::bind_method(D_METHOD("set_sparse_values_byte_offset", "sparse_values_byte_offset"), &GLTFAccessor::set_sparse_values_byte_offset);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "buffer_view"), "set_buffer_view", "get_buffer_view"); // GLTFBufferViewIndex
	ADD_PROPERTY(PropertyInfo(Variant::INT, "byte_offset"), "set_byte_offset", "get_byte_offset"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "component_type"), "set_component_type", "get_component_type"); // int
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "normalized"), "set_normalized", "get_normalized"); // bool
	ADD_PROPERTY(PropertyInfo(Variant::INT, "count"), "set_count", "get_count"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "accessor_type"), "set_accessor_type", "get_accessor_type"); // GLTFAccessor::GLTFAccessorType
	ADD_PROPERTY(PropertyInfo(Variant::INT, "type", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NONE), "set_type", "get_type"); // Deprecated, int for GLTFAccessor::GLTFAccessorType
	ADD_PROPERTY(PropertyInfo(Variant::PACKED_FLOAT64_ARRAY, "min"), "set_min", "get_min"); // Vector<real_t>
	ADD_PROPERTY(PropertyInfo(Variant::PACKED_FLOAT64_ARRAY, "max"), "set_max", "get_max"); // Vector<real_t>
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_count"), "set_sparse_count", "get_sparse_count"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_indices_buffer_view"), "set_sparse_indices_buffer_view", "get_sparse_indices_buffer_view"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_indices_byte_offset"), "set_sparse_indices_byte_offset", "get_sparse_indices_byte_offset"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_indices_component_type"), "set_sparse_indices_component_type", "get_sparse_indices_component_type"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_values_buffer_view"), "set_sparse_values_buffer_view", "get_sparse_values_buffer_view"); // int
	ADD_PROPERTY(PropertyInfo(Variant::INT, "sparse_values_byte_offset"), "set_sparse_values_byte_offset", "get_sparse_values_byte_offset"); // int
}

// Property getters and setters.

GLTFBufferViewIndex GLTFAccessor::get_buffer_view() const {
	return buffer_view;
}

void GLTFAccessor::set_buffer_view(GLTFBufferViewIndex p_buffer_view) {
	buffer_view = p_buffer_view;
}

int64_t GLTFAccessor::get_byte_offset() const {
	return byte_offset;
}

void GLTFAccessor::set_byte_offset(int64_t p_byte_offset) {
	byte_offset = p_byte_offset;
}

GLTFAccessor::GLTFComponentType GLTFAccessor::get_component_type() const {
	return component_type;
}

void GLTFAccessor::set_component_type(GLTFComponentType p_component_type) {
	component_type = (GLTFComponentType)p_component_type;
}

bool GLTFAccessor::get_normalized() const {
	return normalized;
}

void GLTFAccessor::set_normalized(bool p_normalized) {
	normalized = p_normalized;
}

int64_t GLTFAccessor::get_count() const {
	return count;
}

void GLTFAccessor::set_count(int64_t p_count) {
	count = p_count;
}

GLTFAccessor::GLTFAccessorType GLTFAccessor::get_accessor_type() const {
	return accessor_type;
}

void GLTFAccessor::set_accessor_type(GLTFAccessorType p_accessor_type) {
	accessor_type = p_accessor_type;
}

int GLTFAccessor::get_type() const {
	return (int)accessor_type;
}

void GLTFAccessor::set_type(int p_accessor_type) {
	accessor_type = (GLTFAccessorType)p_accessor_type; // TODO: Register enum
}

Vector<double> GLTFAccessor::get_min() const {
	return min;
}

void GLTFAccessor::set_min(Vector<double> p_min) {
	min = p_min;
}

Vector<double> GLTFAccessor::get_max() const {
	return max;
}

void GLTFAccessor::set_max(Vector<double> p_max) {
	max = p_max;
}

int64_t GLTFAccessor::get_sparse_count() const {
	return sparse_count;
}

void GLTFAccessor::set_sparse_count(int64_t p_sparse_count) {
	sparse_count = p_sparse_count;
}

GLTFBufferViewIndex GLTFAccessor::get_sparse_indices_buffer_view() const {
	return sparse_indices_buffer_view;
}

void GLTFAccessor::set_sparse_indices_buffer_view(GLTFBufferViewIndex p_sparse_indices_buffer_view) {
	sparse_indices_buffer_view = p_sparse_indices_buffer_view;
}

int64_t GLTFAccessor::get_sparse_indices_byte_offset() const {
	return sparse_indices_byte_offset;
}

void GLTFAccessor::set_sparse_indices_byte_offset(int64_t p_sparse_indices_byte_offset) {
	sparse_indices_byte_offset = p_sparse_indices_byte_offset;
}

GLTFAccessor::GLTFComponentType GLTFAccessor::get_sparse_indices_component_type() const {
	return sparse_indices_component_type;
}

void GLTFAccessor::set_sparse_indices_component_type(GLTFComponentType p_sparse_indices_component_type) {
	sparse_indices_component_type = (GLTFComponentType)p_sparse_indices_component_type;
}

GLTFBufferViewIndex GLTFAccessor::get_sparse_values_buffer_view() const {
	return sparse_values_buffer_view;
}

void GLTFAccessor::set_sparse_values_buffer_view(GLTFBufferViewIndex p_sparse_values_buffer_view) {
	sparse_values_buffer_view = p_sparse_values_buffer_view;
}

int64_t GLTFAccessor::get_sparse_values_byte_offset() const {
	return sparse_values_byte_offset;
}

void GLTFAccessor::set_sparse_values_byte_offset(int64_t p_sparse_values_byte_offset) {
	sparse_values_byte_offset = p_sparse_values_byte_offset;
}

// Trivial helper functions.

GLTFAccessor::GLTFAccessorType GLTFAccessor::_get_accessor_type_from_str(const String &p_string) {
	if (p_string == "SCALAR") {
		return GLTFAccessor::TYPE_SCALAR;
	}
	if (p_string == "VEC2") {
		return GLTFAccessor::TYPE_VEC2;
	}
	if (p_string == "VEC3") {
		return GLTFAccessor::TYPE_VEC3;
	}
	if (p_string == "VEC4") {
		return GLTFAccessor::TYPE_VEC4;
	}
	if (p_string == "MAT2") {
		return GLTFAccessor::TYPE_MAT2;
	}
	if (p_string == "MAT3") {
		return GLTFAccessor::TYPE_MAT3;
	}
	if (p_string == "MAT4") {
		return GLTFAccessor::TYPE_MAT4;
	}
	ERR_FAIL_V(GLTFAccessor::TYPE_SCALAR);
}

String GLTFAccessor::_get_accessor_type_name() const {
	switch (accessor_type) {
		case GLTFAccessor::TYPE_SCALAR:
			return "SCALAR";
		case GLTFAccessor::TYPE_VEC2:
			return "VEC2";
		case GLTFAccessor::TYPE_VEC3:
			return "VEC3";
		case GLTFAccessor::TYPE_VEC4:
			return "VEC4";
		case GLTFAccessor::TYPE_MAT2:
			return "MAT2";
		case GLTFAccessor::TYPE_MAT3:
			return "MAT3";
		case GLTFAccessor::TYPE_MAT4:
			return "MAT4";
		default:
			break;
	}
	ERR_FAIL_V("SCALAR");
}

// Dictionary conversion.

Ref<GLTFAccessor> GLTFAccessor::from_dictionary(const Dictionary &p_dict) {
	// See https://github.com/KhronosGroup/glTF/blob/main/specification/2.0/schema/accessor.schema.json
	Ref<GLTFAccessor> accessor;
	accessor.instantiate();
	if (p_dict.has("bufferView")) {
		// bufferView is optional. If not present, the accessor is considered to be zero-initialized.
		accessor->buffer_view = p_dict["bufferView"];
	}
	if (p_dict.has("byteOffset")) {
		accessor->byte_offset = p_dict["byteOffset"];
	}
	if (p_dict.has("componentType")) {
		accessor->component_type = (GLTFAccessor::GLTFComponentType)(int32_t)p_dict["componentType"];
	}
	if (p_dict.has("count")) {
		accessor->count = p_dict["count"];
	}
	if (accessor->count <= 0) {
		ERR_PRINT("glTF import: Invalid accessor count " + itos(accessor->count) + " for accessor. Accessor count must be greater than 0.");
	}
	if (p_dict.has("max")) {
		accessor->max = p_dict["max"];
	}
	if (p_dict.has("min")) {
		accessor->min = p_dict["min"];
	}
	if (p_dict.has("normalized")) {
		accessor->normalized = p_dict["normalized"];
	}
	if (p_dict.has("sparse")) {
		// See https://github.com/KhronosGroup/glTF/blob/main/specification/2.0/schema/accessor.sparse.schema.json
		const Dictionary &sparse_dict = p_dict["sparse"];
		ERR_FAIL_COND_V(!sparse_dict.has("count"), accessor);
		accessor->sparse_count = sparse_dict["count"];
		ERR_FAIL_COND_V(!sparse_dict.has("indices"), accessor);
		const Dictionary &sparse_indices_dict = sparse_dict["indices"];
		ERR_FAIL_COND_V(!sparse_indices_dict.has("bufferView"), accessor);
		accessor->sparse_indices_buffer_view = sparse_indices_dict["bufferView"];
		ERR_FAIL_COND_V(!sparse_indices_dict.has("componentType"), accessor);
		accessor->sparse_indices_component_type = (GLTFAccessor::GLTFComponentType)(int32_t)sparse_indices_dict["componentType"];
		if (sparse_indices_dict.has("byteOffset")) {
			accessor->sparse_indices_byte_offset = sparse_indices_dict["byteOffset"];
		}
		ERR_FAIL_COND_V(!sparse_dict.has("values"), accessor);
		const Dictionary &sparse_values_dict = sparse_dict["values"];
		ERR_FAIL_COND_V(!sparse_values_dict.has("bufferView"), accessor);
		accessor->sparse_values_buffer_view = sparse_values_dict["bufferView"];
		if (sparse_values_dict.has("byteOffset")) {
			accessor->sparse_values_byte_offset = sparse_values_dict["byteOffset"];
		}
	}
	accessor->accessor_type = _get_accessor_type_from_str(p_dict["type"]);
	return accessor;
}

Dictionary GLTFAccessor::to_dictionary() const {
	Dictionary dict;
	if (buffer_view != -1) {
		// bufferView may be omitted to zero-initialize the buffer. When this happens, byteOffset MUST also be omitted.
		if (byte_offset > 0) {
			dict["byteOffset"] = byte_offset;
		}
		dict["bufferView"] = buffer_view;
	}
	dict["componentType"] = component_type;
	dict["count"] = count;
	dict["max"] = max;
	dict["min"] = min;
	dict["normalized"] = normalized;
	dict["type"] = _get_accessor_type_name();

	if (sparse_count > 0) {
		Dictionary sparse_indices_dict;
		sparse_indices_dict["bufferView"] = sparse_indices_buffer_view;
		sparse_indices_dict["componentType"] = sparse_indices_component_type;
		if (sparse_indices_byte_offset > 0) {
			sparse_indices_dict["byteOffset"] = sparse_indices_byte_offset;
		}
		Dictionary sparse_values_dict;
		sparse_values_dict["bufferView"] = sparse_values_buffer_view;
		if (sparse_values_byte_offset > 0) {
			sparse_values_dict["byteOffset"] = sparse_values_byte_offset;
		}
		Dictionary sparse_dict;
		sparse_dict["count"] = sparse_count;
		sparse_dict["indices"] = sparse_indices_dict;
		sparse_dict["values"] = sparse_values_dict;
		dict["sparse"] = sparse_dict;
	}
	return dict;
}