#pragma once

#include <map>
#include <string>
#include <vector>

class JsonValue
{
public:
	enum class Type
	{
		Null,
		Boolean,
		Number,
		String,
		Array,
		Object
	};

	JsonValue();
	explicit JsonValue(bool value);
	explicit JsonValue(double value);
	explicit JsonValue(const char* value);
	explicit JsonValue(const std::string& value);

	static JsonValue MakeArray();
	static JsonValue MakeObject();

	Type type() const { return mType; }

	bool isNull() const { return mType == Type::Null; }
	bool isBoolean() const { return mType == Type::Boolean; }
	bool isNumber() const { return mType == Type::Number; }
	bool isString() const { return mType == Type::String; }
	bool isArray() const { return mType == Type::Array; }
	bool isObject() const { return mType == Type::Object; }

	bool asBoolean(bool fallback = false) const;
	double asNumber(double fallback = 0.0) const;
	const std::string& asString() const;
	const std::vector<JsonValue>& asArray() const;
	const std::map<std::string, JsonValue>& asObject() const;

	std::vector<JsonValue>& array();
	std::map<std::string, JsonValue>& object();

	void pushBack(const JsonValue& value);
	void set(const std::string& key, const JsonValue& value);

	const JsonValue* find(const std::string& key) const;

private:
	void reset(Type type);

	Type mType;
	bool mBooleanValue;
	double mNumberValue;
	std::string mStringValue;
	std::vector<JsonValue> mArrayValue;
	std::map<std::string, JsonValue> mObjectValue;
};

bool ParseJson(const std::string& text, JsonValue& value, std::string& error);
std::string SerializeJson(const JsonValue& value, bool pretty = false);
std::vector<double> JsonArrayToNumbers(const JsonValue& value);
