#ifndef CONTEXT_H_
#define CONTEXT_H_

#include <string>
#include <vector>
#include <boost/unordered_map.hpp>
#include "value.h"

class Context
{
public:
	Context(const Context *parent = NULL);
	virtual ~Context();

	virtual Value evaluate_function(const std::string &name, const class EvalContext *evalctx) const;
	virtual class AbstractNode *evaluate_module(const class ModuleInstantiation &inst, const EvalContext *evalctx) const;

	void setVariables(const std::vector<std::string> &argnames, 
										const std::vector<class Expression*> &argexpr, 
										const class EvalContext *evalctx = NULL);

	void set_variable(const std::string &name, const Value &value);
	void set_constant(const std::string &name, const Value &value);

	Value lookup_variable(const std::string &name, bool silent = false) const;

	void setDocumentPath(const std::string &path) { this->document_path = path; }
	const std::string &documentPath() const { return this->document_path; }
	std::string getAbsolutePath(const std::string &filename) const;

public:
	const Context *parent;

	static std::vector<const Context*> ctx_stack;

	mutable boost::unordered_map<std::string, int> recursioncount;

protected:
	typedef boost::unordered_map<std::string, Value> ValueMap;
	ValueMap constants;
	ValueMap variables;
	ValueMap config_variables;

	std::string document_path;

#ifdef DEBUG
public:
	virtual void dump(const class AbstractModule *mod, const ModuleInstantiation *inst);
#endif
};

#endif