#ifndef MESSAGES_H
#define MESSAGES_H

#include "types.h"
#include "Symbol.h"
#include <string>

/* Keeps track of and shows, warning and error messages */
class Messages {
public:
    /* ctor */
    Messages();

    /* Show warnings messages */
    void EnableWarnings();
    /* Do not show warning message */
    void DisableWarnings();

    /* Give warning on line number lineno in source file */
    void Warning(int lineno, const char *msg, ...);
    /* Give error on line number lineno in source file */
    void Error(int lineno, const char *msg, ...);

    /* Give warning for a coercion */
    void CoercionWarning(int lineno, ReturnType to, ReturnType from);

    /* Give error for using a function as a procedure */
    void ReturnValueError(int lineno, const string& id, ReturnType type);

    /* Give error for a type mismatch */
    void TypeError(int lineno, ReturnType expected, ReturnType received);

    /* Give error for undeclared identifier */
    void UndeclaredIdError(int lineno, const std::string& id);

    /* Give error for an identifier that is declared multiple times */
    void DeclaredIdError(int lineno, const std::string& id, int prev_lineno);

    /* Give error for identifier that is not a lvalue */
    void LValueError(int lineno, const std::string& id);

    /* Give error for using an identifier that is not a rvalue */
    void RValueError(int lineno, const std::string& id, SymbolType symbol_type);

    /* Give error for using id as function/procedure when it's not */
    void CallError(int lineno, const std::string& id, SymbolType symbol_type);

    /* Give error for incorrect number of parameters in function/procedure call */
    void ParamCountError(int lineno, int paramcount, Symbol *symbol);

    /* Show how many warnings and errors there were */
    void ShowNumbers() const;

    /* Returns the number of errors */
    int GetErrors() const;

    /* Returns the number of warnings */
    int GetWarnings() const;
private:
    std::string SignatureString(Symbol *symbol);
    bool show_warnings;
    int warnings;
    int suppressed;
    int errors;
};

#endif /* MESSAGES_H */