#pragma once

#include <string>
#include <variant>
#include <vector>

#include <nlohmann/json.hpp>

#include <cppbase/pointer.hpp>
#include <cppbase/result.hpp>

#include <ikarus/values/errors.hpp>
#include <ikarus/values/schema.h>

struct IkarusValue;
struct IkarusValueData;
struct IkarusValueSchema;

struct IkarusValueSchemaPrimitive {
	IkarusValuePrimitiveType type;
};

struct IkarusValueSchemaList {
	cppbase::owning_ptr<IkarusValueSchema> sub_schema;
};

struct IkarusValueSchemaMap {
	cppbase::owning_ptr<IkarusValueSchema> key_schema;
	cppbase::owning_ptr<IkarusValueSchema> value_schema;
};

struct IkarusValueSchemaTuple {
	std::vector<cppbase::owning_ptr<IkarusValueSchema>> sub_schemas;
};

struct IkarusValueSchema {
	using IkarusValueSchemaVariant = std::variant<
		IkarusValueSchemaPrimitive,
		IkarusValueSchemaList,
		IkarusValueSchemaMap,
		IkarusValueSchemaTuple>;

	static auto from_json(nlohmann::json const & json)
		-> cppbase::Result<IkarusValueSchema, IkarusValueSchemaParseError>;
	static auto to_json(nlohmann::json & json, IkarusValueSchema const & value)
		-> void;

	auto validate(IkarusValueData const & data) const -> bool;

	IkarusValueSchemaVariant variant;
};