//=================================================================
#include <stdio.h>
#include <string.h>
#include <iostream>
#include <math.h>
#include <signal.h>
#include <unistd.h>
//=================================================================
//=================================================================
//               CLASS NODES
//=================================================================

using namespace std;

class Alist {
    int cname;
    int debug;
    //------------------------------------------------
public:
    Alist *prev, *next, *first, *curr, *last; 
    
    ~Alist() { if(first->debug) cout << " Destructor !!! name="<<cname<<"\n"; }
    
    void SetDebug(int level) { 
	cout <<" Set Debug Level ="<<level<<"\n";
	first->debug=level;
    }
    
    void insert(Alist* p)
	{ p->first=first;
	    p->next = next;
	    p->prev = this;
	    if(first->debug) cout <<" insert: "<<p->cname<<" after "<<cname<<'\n';
	    if(first->debug) printf(" ins: p=%p \n",p);
	    if (next) next->prev = p;
	    else {
		if(first->debug) cout<< "*** Error  Insert, Append !!! \n"; 
		first->last=p;
	    }
	    next = p;
	}
    
    void append(Alist* p)
	{ p->first=first;
	    p->next = last->next;
	    p->prev = last;
	    if(first->debug) cout <<" append: "<<p->cname<<" after "<<last->cname<<'\n';
	    if (last->next)  {  
		if(first->debug) cout << "*** Error Append, Insert !!! \n";  
		last->next->prev = p;
	    }
	    last->next = p;
	    last=p;
	}
    
    Alist* GoHome() { first->curr=first;  return first;  }
    
    Alist* GetNext() {
	if (first->curr) first->curr=curr->next;
	else             first->curr=first->next;        // else go home
	return first->curr; 
    }
    
    void remove() {  
	if(first->debug) cout <<"*** Remove node="<<cname<<'\n';
	if (this==first) { cout << "*** Error: remove HEAD of LIST !\n"; exit(1);}
	if (next) next->prev=prev; else first->last=prev; //  last ?
	prev->next=next; 
	if (first->curr==this) first->curr=prev;
	delete this;  //    prev=0;    next=0;    first=this;    last=this;
    }
    
    void print() { cout << " print: Alist Name="<<cname<<"  "; 
	//    cout <<" prev="<<prev<<" this="<<this<<" next="<<next<<"\n";
	cout <<"        prog="<<prog<<", socket="<<a_socket<<", status="<<status<< 
	    ", host="<< host << ", data_host="<<branch<<"\n";
    }
    
    // ...------------ public var  ---------------------------------------------
    int  a_socket;
    char prog[64];
    char status[64];
    char branch[64]; 
    char onl[64];
    char host[64];
    
    //  Alist(int c,int sock_in, char *prog_in, char *status_in, char *branch_in, char *onl_in, char *host_in) {  
    Alist(int c,int sock_in, const char *host_name) {  
	cname=c;  prev=0; next=0;  first=this; last=this; curr=this;
	a_socket=sock_in; 
	
	strncpy(status,"UNDEF",64); 
	
	strncpy(prog,"UNDEF",64); 
	strncpy(branch,"UNDEF",64); 
	strncpy(onl,"UNDEF",64); 
	strncpy(host,host_name,64); 
	
	if(first->debug) { 
	    cout <<"Create new Alist: "<<cname
		 <<", prev="<<prev<<" next="<<next<<" this="<<this<<'\n'; 
	    cout <<"        prog="<<prog<<", socket="<<a_socket<<", status="<<status<<", branch="<<branch<<", host="<<host<<"\n";
	}
    }
};

// AC STS IDLE ONLINE z305f.desy.de    
// first=new Alist(-1,0,"status");