// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.

#ifndef tools_valop
#define tools_valop

#include "ival_func"

namespace tools {

class valop {
  static const std::string& s_class() {
    static const std::string s_v("tools::valop");
    return s_v;
  }
public:
  enum e_type {
    CMP_GT = 1,
    CMP_GE = 2,
    CMP_LT = 3,
    CMP_LE = 4,
    CMP_EQ = 5,
    CMP_NE = 6,
    CMP_AND = 7,
    CMP_OR = 8,

    ADD = 9,
    MUL = 10,
    SUB = 11,
    DIV = 12,

    ASSIGN = 13,
    MINUS = 14,
    UNSIGNED_INTEGER = 15,
    REAL = 16,
    NAME = 17,
    STRING = 18,
    //PI = 19,
    FUNC = 20,
    BOOL_TRUE = 21,
    BOOL_FALSE = 22,
    NOT = 23,
    // math edition :
    SYMBOL = 100,
    ASIDE = 101,
    NVMUL = 102, //not visible mul
    EQUAL = 103,
    SUPS = 104,  //super script
    SUBS = 105   //sub script
  };

public:
  valop(e_type a_type)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
  }

  valop(e_type a_type,valop* a_A)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
  }

  valop(e_type a_type,valop* a_A,valop* a_B)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
  }

  valop(e_type a_type,ival_func* a_function,valop* a_A)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,ival_func* a_function,valop* a_A,valop* a_B)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,ival_func* a_function,valop* a_A,valop* a_B,valop* a_C)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(a_C),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,ival_func* a_function,valop* a_A,valop* a_B,valop* a_C,valop* a_D)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(a_C),m_D(a_D),m_E(0),m_F(0),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,ival_func* a_function,valop* a_A,valop* a_B,valop* a_C,valop* a_D,valop* a_E)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(a_C),m_D(a_D),m_E(a_E),m_F(0),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,ival_func* a_function,
             valop* a_A,valop* a_B,valop* a_C,
             valop* a_D,valop* a_E,valop* a_F)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(a_A),m_B(a_B),m_C(a_C),m_D(a_D),m_E(a_E),m_F(a_F),m_tag(0){
    m_function = a_function?a_function->copy():0;
  }

  valop(e_type a_type,bool a_v)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_variable.set(a_v);
  }

  valop(e_type a_type,unsigned int a_number)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_variable.set(a_number);
  }

  valop(e_type a_type,double a_number)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_variable.set(a_number);
  }

  valop(e_type a_type,const std::string& a_string)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_variable.set(a_string);
  }

  //NOTE : the below is needed so that valop("t") not put on valop(bool).
  valop(e_type a_type,const char* a_cstr)
  :m_type(a_type),m_function(0),m_index(not_found())
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    m_variable.set(a_cstr);
  }

  valop(e_type a_type,const std::string& a_name,int a_index)
  :m_type(a_type),m_function(0),m_name(a_name),m_index(a_index)
  ,m_A(0),m_B(0),m_C(0),m_D(0),m_E(0),m_F(0),m_tag(0){
    // a_name needed to not confuse with the constructor (e_type,unsigned int).
  }

  virtual ~valop() {
    delete m_function;
    delete m_A;
    delete m_B;
    delete m_C;
    delete m_D;
    delete m_E;
    delete m_F;
  }
public:
  valop(const valop& a_from)
  :m_type(a_from.m_type)
  ,m_function(a_from.m_function?a_from.m_function->copy():0)
  ,m_variable(a_from.m_variable)
  ,m_name(a_from.m_name)
  ,m_index(a_from.m_index)

  ,m_A(a_from.m_A?new valop(*a_from.m_A):0)
  ,m_B(a_from.m_B?new valop(*a_from.m_B):0)
  ,m_C(a_from.m_C?new valop(*a_from.m_C):0)
  ,m_D(a_from.m_D?new valop(*a_from.m_D):0)
  ,m_E(a_from.m_E?new valop(*a_from.m_E):0)
  ,m_F(a_from.m_F?new valop(*a_from.m_F):0)

  ,m_tag(a_from.m_tag)
  {
  }
  valop& operator=(const valop& a_from) {
    if(&a_from==this) return *this;

    m_type = a_from.m_type;

    delete m_function;
    m_function = a_from.m_function?a_from.m_function->copy():0;

    m_variable = a_from.m_variable;
    m_name = a_from.m_name;
    m_index = a_from.m_index;

    delete m_A;
    delete m_B;
    delete m_C;
    delete m_D;
    delete m_E;
    delete m_F;
    m_A = a_from.m_A?new valop(*a_from.m_A):0;
    m_B = a_from.m_B?new valop(*a_from.m_B):0;
    m_C = a_from.m_C?new valop(*a_from.m_C):0;
    m_D = a_from.m_D?new valop(*a_from.m_D):0;
    m_E = a_from.m_E?new valop(*a_from.m_E):0;
    m_F = a_from.m_F?new valop(*a_from.m_F):0;

    m_tag = a_from.m_tag;
    return *this;
  }

protected:
  static int not_found() {return -1;}
public:
  e_type m_type;
  ival_func* m_function; //owner
  value m_variable;
  std::string m_name;
  int m_index;
  valop* m_A;
  valop* m_B;
  valop* m_C;
  valop* m_D;
  valop* m_E;
  valop* m_F;
public:
  int m_tag;
};

class valop_visitor {
public:
  virtual ~valop_visitor() {}
public:
  virtual bool binary(unsigned int,const valop&,const valop&) = 0;
  virtual bool unary(unsigned int,const valop&) = 0;
  virtual bool variable(unsigned int,const value&) = 0;
  virtual bool option(const valop&) = 0;
  virtual bool func_1(const valop&,const valop&) = 0;
  virtual bool func_2(const valop&,const valop&,const valop&) = 0;
  virtual bool func_3(const valop&,const valop&,const valop&,const valop&) = 0;
  virtual bool func_4(const valop&,const valop&,const valop&,
                                   const valop&,const valop&) = 0;
  virtual bool func_5(const valop&,const valop&,const valop&,
                                   const valop&,const valop&,const valop&) = 0;
  virtual bool func_6(const valop&,const valop&,const valop&,
                                   const valop&,const valop&,
                                   const valop&,const valop&) = 0;
public:
  bool visit(const valop& a_valop) {
    switch(a_valop.m_type) {
    case valop::CMP_GT:
    case valop::CMP_GE:
    case valop::CMP_LT:
    case valop::CMP_LE:
    case valop::CMP_EQ:
    case valop::CMP_NE:
    case valop::CMP_AND:
    case valop::CMP_OR:

    case valop::ADD:
    case valop::MUL:
    case valop::SUB:
    case valop::DIV:

    case valop::ASIDE:
    case valop::NVMUL:
    case valop::EQUAL:
    case valop::SUPS:
    case valop::SUBS:
      if(!a_valop.m_A || !a_valop.m_B) break;
      return binary(a_valop.m_type,*a_valop.m_A,*a_valop.m_B);

    case valop::BOOL_TRUE:
    case valop::BOOL_FALSE:
    case valop::UNSIGNED_INTEGER:
    case valop::REAL:
    case valop::STRING:
    case valop::SYMBOL:
      return variable(a_valop.m_type,a_valop.m_variable);
    case valop::NAME:
      return option(a_valop);
    case valop::MINUS:
    case valop::NOT:
    case valop::ASSIGN:
      if(!a_valop.m_A) break;
      return unary(a_valop.m_type,*a_valop.m_A);
    case valop::FUNC:{
      if(!a_valop.m_A) break;
      if(!a_valop.m_function) {
        return false;
      }
      size_t argn = a_valop.m_function->number_of_arguments();
      if(argn==1) {
        return func_1(a_valop,*a_valop.m_A);
      } else if(argn==2) {
        if(!a_valop.m_B) break;
        return func_2(a_valop,*a_valop.m_A,*a_valop.m_B);
      } else if(argn==3) {
        if(!a_valop.m_B || !a_valop.m_C) break;
        return func_3(a_valop,*a_valop.m_A,*a_valop.m_B,*a_valop.m_C);
      } else if(argn==4) {
        if(!a_valop.m_B || !a_valop.m_C || !a_valop.m_D) break;
        return func_4(a_valop,*a_valop.m_A,*a_valop.m_B,*a_valop.m_C,*a_valop.m_D);
      } else if(argn==5) {
        if(!a_valop.m_B || !a_valop.m_C || !a_valop.m_D || !a_valop.m_E) break;
        return func_5(a_valop,*a_valop.m_A,*a_valop.m_B,*a_valop.m_C,*a_valop.m_D,*a_valop.m_E);
      } else if(argn==6) {
        if(!a_valop.m_B || !a_valop.m_C || !a_valop.m_D || !a_valop.m_E || !a_valop.m_F) break;
        return func_6(a_valop,*a_valop.m_A,*a_valop.m_B,*a_valop.m_C,*a_valop.m_D,*a_valop.m_E,*a_valop.m_F);
      } else {
        return false;
      }}
    default:
      break;
    }
    return false;
  }
};

}

#endif