/**
 *  @file
 *  @author     2012-2014 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
 *  @copyright  Simplified BSD
 *
 *  @cond
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the FreeBSD license as published by the FreeBSD
 *  project.
 *
 *  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.
 *
 *  You should have received a copy of the FreeBSD license along with this
 *  program. If not, see <http://www.opensource.org/licenses/bsd-license>.
 *  @endcond
 */

#ifndef DATA_H_09E4D8E5
#define DATA_H_09E4D8E5

#include <list>
#include <map>

#include <boost/shared_ptr.hpp>

#include "uscxml/Common.h"
#include "uscxml/Convenience.h"
#include "uscxml/messages/Blob.h"
#include <DOM/Document.hpp>

namespace uscxml {

static int _dataIndentation = 1;

class USCXML_API Data {
public:
	enum Type {
		VERBATIM,
		INTERPRETED,
	};

	Data() : type(INTERPRETED) {}

	// TODO: default INTERPRETED is unfortunate
	Data(const std::string& atom, Type type) : atom(atom), type(type) {}
	Data(const char* data, size_t size, const std::string& mimeType, bool adopt = false);

	// convenience constructors
	Data(short atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(int atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(unsigned int atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(long atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(unsigned long atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(long long int atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(float atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(double atom) : atom(toStr(atom)), type(INTERPRETED) {}
	Data(bool atom) : type(INTERPRETED) {
		if (atom) {
			this->atom = "true";
		} else {
			this->atom = "false";
		}
	}

	template <typename T> Data(T value, Type type) : atom(toStr(value)), type(type) {}

#if 0
	// constructor for arbitrary types, skip if type is subclass though (C++11)
	// we will have to drop this constructor as it interferes with operator Data() and requires C++11
	template <typename T>
	Data(T value, typename std::enable_if<! std::is_base_of<Data, T>::value>::type* = nullptr)
		: atom(toStr(value)), type(INTERPRETED) {}
#endif


	explicit Data(const Arabica::DOM::Node<std::string>& dom);
	~Data() {}

	bool empty() const {
		bool hasContent = (atom.length() > 0 || !compound.empty() || !array.empty() || binary || node);
		return !hasContent;
	}

	bool operator<(const Data& other) const {
		std::string thisJSON = Data::toJSON(*this);
		std::string otherJSON = Data::toJSON(other);
		return (thisJSON < otherJSON);
	}

	void merge(const Data& other);

	bool hasKey(const std::string& key) const {
		return (!compound.empty() && compound.find(key) != compound.end());
	}

	Data& operator[](const std::string& key) {
		return operator[](key.c_str());
	}

	const Data& operator[](const std::string& key) const {
		return operator[](key.c_str());
	}

	Data& operator[](const char* key) {
		return compound[key];
	}

	const Data& operator[](const char* key) const {
		return compound.at(key);
	}

	Data& operator[](const size_t index) {
		while(array.size() < index) {
			array.push_back(Data("", Data::VERBATIM));
		}
		std::list<Data>::iterator arrayIter = array.begin();
		for (size_t i = 0; i < index; i++, arrayIter++) {}
		return *arrayIter;
	}

	const Data at(const std::string& key) const {
		return at(key.c_str());
	}

	const Data at(const char* key) const {
		if (hasKey(key))
			return compound.at(key);
		Data data;
		return data;
	}

	const Data item(const size_t index) const {
		if (array.size() > index) {
			std::list<Data>::const_iterator arrayIter = array.begin();
			for (size_t i = 0; i < index; i++, arrayIter++) {}
			return *arrayIter;
		}
		Data data;
		return data;
	}

	void put(std::string key, const Data& data) {
		compound[key] = data;
	}

	void put(size_t index, const Data& data) {
		this[index] = data;
	}

	bool operator==(const Data &other) const {
		if (other.atom.size() != atom.size())
			return false;
		if (other.type != type)
			return false;
		if (other.binary != binary)
			return false;
		if (other.array.size() != array.size())
			return false;
		if (other.compound.size() != compound.size())
			return false;

		if (other.atom != atom)
			return false;
		if (other.array != array)
			return false;
		if (other.compound != compound)
			return false;
		if (other.node != node)
			return false;

		return true;
	}

	bool operator!=(const Data &other) const {
		return !(*this == other);
	}

	operator std::string() const {
		return atom;
	}

	operator std::map<std::string, Data>() {
		return compound;
	}

	operator std::list<Data>() {
		return array;
	}

	static Data fromJSON(const std::string& jsonString);
	static std::string toJSON(const Data& data);
	static Data fromXML(const std::string& xmlString);
	Arabica::DOM::Document<std::string> toDocument();
	std::string toXMLString() {
		std::stringstream ss;
		ss << toDocument();
		return ss.str();
	}

	std::map<std::string, Data> getCompound() {
		return compound;
	}
	void setCompound(const std::map<std::string, Data>& compound) {
		this->compound = compound;
	}

	std::list<Data> getArray() {
		return array;
	}
	void setArray(const std::list<Data>& array) {
		this->array = array;
	}

	std::string getAtom() const {
		return atom;
	}
	void setAtom(const std::string& atom) {
		this->atom = atom;
	}

	Blob getBinary() {
		return this->binary;
	}
	void setBinary(const Blob& binary) {
		this->binary = binary;
	}

	Type getType() {
		return type;
	}
	void setType(const Type type) {
		this->type = type;
	}

#ifdef SWIGIMPORTED
protected:
#endif

	Arabica::DOM::Node<std::string> node;
	std::map<std::string, Data> compound;
	std::list<Data> array;
	std::string atom;
	Blob binary;
	Type type;

protected:
	Arabica::DOM::Document<std::string> toNode(const Arabica::DOM::Document<std::string>& factory, const Data& data);
	friend USCXML_API std::ostream& operator<< (std::ostream& os, const Data& data);
};

USCXML_API std::ostream& operator<< (std::ostream& os, const Data& data);

}

#endif /* end of include guard: DATA_H_09E4D8E5 */