#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

struct data
{
    int date;
    int month;
    int year;
};

struct gsm
{
    int nomer;
	char vid[20];
    char marka[20];
    data DataNaPoluchavane;
    char cvqt[20];
    int broi;
    double cena;
}a;

fstream f;
int is;

void Input()
{
    cout<<"Nomer na artikul: "; cin>>a.nomer;
    is=getchar();
    cout<<"Vid: "; cin.getline(a.vid,20);
    cout<<"Marka: "; cin.getline(a.marka,20);
    cout<<"Data na poluchavane: "; cin>>a.DataNaPoluchavane.date>>a.DataNaPoluchavane.month>>a.DataNaPoluchavane.year;
    is=getchar();
    cout<<"Cvqt: "; cin.getline(a.cvqt,20);
    cout<<"Broi: "; cin>>a.broi;
    cout<<"Cena: "; cin>>a.cena;
}

void Print()
{
	cout<<"Nomer na artikul: "; cout<<a.nomer<<endl;
    is=getchar();
    cout<<"Vid: "; cout<<a.vid<<endl;
    cout<<"Marka: "; cout<<a.marka<<endl;
    cout<<"Data na poluchavane: "; cout<<a.DataNaPoluchavane.date<<"."<<a.DataNaPoluchavane.month<<"."<<a.DataNaPoluchavane.year<<endl;
    cout<<"Cvqt: "; cout<<a.cvqt<<endl;
    cout<<"Broi: "; cout<<a.broi<<endl;
    cout<<"Cena: "; cout<<a.cena<<endl<<endl;
}

void Create ()
{
    f.open("gsm.dat",ios::out);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    int n=1;
    while (n==1)
    {
        Input();
        f.write((const char*)&a,sizeof(struct gsm));
        cout<<"Za da produljite da zapisvate natisnete 1, a za da sprete drug buton"<<endl;
        cin>>n;
    }
    f.close();
}

void Append()
{
    f.open("gsm.dat",ios::app);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    int n=1;
    while (n==1)
    {
        Input();
        f.write((const char*)&a,sizeof(struct gsm));
        cout<<"Za da produljite da zapisvate natisnete 1, a za da sprete drug buton"<<endl;
        cin>>n;
    }
    f.close();
}

void Update ()
{
    f.open("curier.dat",ios::in|ios::out);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    unsigned long pos;
    int nomer;
    cout<<"Vuvedi turseniq nomer na artikul za promqna: ";
    cin>>nomer;
    f.seekg(0);
    while (f.read((char*)&a,sizeof(struct gsm)))
    {
        if (a.nomer==nomer)
        {
            cout<<"Vuvedi novi danni:"<<endl;
            Input();
            pos=f.tellg();
            pos=pos-sizeof(struct gsm);
            f.seekg(pos);
            f.write((const char*)&a,sizeof(struct gsm));
        }
    }
    f.close();
}

void DeleteNomer()
{
    f.open("gsm.dat",ios::in);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    fstream f1;
    f1.open("gsm1.dat",ios::out);
    if (!f1)
    {
        cout<<"Error!"<<endl;
        return;
    }
    int nomer;
    cout<<"Vuvedi turseniq nomer za iztrivane na artikul:";
    cin>>nomer;
    f.seekg(0);
    while(f.read((char*)&a,sizeof(gsm)))
    {
        if (a.nomer!=nomer)
        {
            f1.write((const char*)&a,sizeof(struct gsm));
            cout<<endl;
        }
    }
    f.close();
    f1.close();
    f.open("gsm.dat",ios::out);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    f1.open("gsm1.dat",ios::in);
    if (!f1)
    {
        cout<<"Error!"<<endl;
        return;
    }
    while (f1.read((char*)&a,sizeof(gsm)))
    {
        f.write((const char*)&a,sizeof(struct gsm));
    }
    f.close();
    f1.close();
}

void DeleteMarka()
{
    f.open("gsm.dat",ios::in);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    fstream f1;
    f1.open("gsm1.dat",ios::out);
    if (!f1)
    {
        cout<<"Error!"<<endl;
        return;
    }
    char marka[20];
    is=getchar();
    cout<<"Vuvedi turseniq nomer za iztrivane na pratka:";
    cin.getline(marka,20);
    f.seekg(0);
    while(f.read((char*)&a,sizeof(gsm)))
    {
        if (strcmp(marka,a.marka))
        {
            f1.write((const char*)&a,sizeof(struct gsm));
            cout<<endl;
        }
    }
    f.close();
    f1.close();
    f.open("curier.dat",ios::out);
    if (!f)
    {
        cout<<"Error!"<<endl;
        return;
    }
    f1.open("currier1.dat",ios::in);
    if (!f1)
    {
        cout<<"Error!"<<endl;
        return;
    }
    while (f1.read((char*)&a,sizeof(gsm)))
    {
        f.write((const char*)&a,sizeof(struct gsm));
    }
    f.close();
    f1.close();
}

void MaxCena()
{
	float max;
	max=a.cena;
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	while (f.read((char*)&a,sizeof(struct gsm)))
	if(a.cena>=max) max=a.cena;
	f.close();
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	while (f.read((char*)&a,sizeof(struct gsm)))
	if(a.cena==max)
	{
		cout<<"Nomer: "<<a.nomer<<endl;
		cout<<"Data na poluchavane: "; cout<<a.DataNaPoluchavane.date<<"."<<a.DataNaPoluchavane.month<<"."<<a.DataNaPoluchavane.year<<endl;
		cout<<"Vid: "<<a.cvqt<<endl;
		cout<<"Cvqt: "<<a.cvqt<<endl<<endl;
	}
	f.close();
}

void PrintVid()
{
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	char vid[20];
	is=getchar();
	cout<<"Vuvedi tursen vid: "; cin>>vid;
	while (f.read((char*)&a,sizeof(struct gsm)))
	{

		if(!strcmp(a.vid,vid))
		{
			Print();
		}
	}
	f.close();
}

void PrintObshtaSuma()
{
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	double suma=0;
	while (f.read((char*)&a,sizeof(struct gsm)))
	{
		suma+=a.cena*a.broi;
	}
	cout<<"Obshta suma na vsichki artikuli: "<<suma<<endl;
	f.close();
}

void PrintData()
{
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	data data;
	cout<<"Vuvedi data: "; cin>>data.date>>data.month>>data.year;
	while (f.read((char*)&a,sizeof(struct gsm)))
	{
		if(a.DataNaPoluchavane.date==data.date&&a.DataNaPoluchavane.month==data.month&&a.DataNaPoluchavane.year==data.year)
		{
			Print();
		}
	}
	f.close();
}

void PrintIntervalDati()
{
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	data data1,data2;
	cout<<"Vuvedi purva data: ";cin>>data1.date>>data1.month>>data1.year;
	cout<<"Vuvedi vtora data: ";cin>>data2.date>>data2.month>>data2.year;
	while(f.read((char*)&a,sizeof(gsm)))
    {
        if (data1.year<a.DataNaPoluchavane.year&&data2.year>a.DataNaPoluchavane.year)
        {
            Print();
        }
        else if (data1.year<=a.DataNaPoluchavane.year&&data2.year>=a.DataNaPoluchavane.year&&data1.month<a.DataNaPoluchavane.month&&data2.month>a.DataNaPoluchavane.month)
        {
            Print();
        }
        else if (data1.year<=a.DataNaPoluchavane.year&&data2.year>=a.DataNaPoluchavane.year&&data1.month<=a.DataNaPoluchavane.month&&data2.month>=a.DataNaPoluchavane.month&&data1.date<=a.DataNaPoluchavane.date&&data2.date>=a.DataNaPoluchavane.date)
        {
            Print();
        }
    }
    f.close();
}

void PrintAll()
{
	f.open("gsm.dat",ios::in);
	if (!f) {cout<<"Error"<<"\n"; return ;}
	while (f.read((char*)&a,sizeof(struct gsm)))
	{
		 Print();
	}
	f.close();
}

void DeleteAll()
{
	f.open("gsm.dat",ios::out);
	f.close();
}

int main()
{
	int command = 1 ;
	while (command!=0)
	{
		cout<<"INFORMACIONNA SISTEMA - KURIERI"<<endl;
		cout<<"******************************************************************************************\n";
		cout<<"\n izberete chislo ot 1 do 12 spored funkciqta:\n"<<endl;
		cout<<"\t 1 -> create \t /sazdavane na fail/\n"<<endl;
		cout<<"\t 2 -> append \t /dobavqne na pratki/\n"<<endl;
		cout<<"\t 3 -> update \t /promqna na danni na pratka po nomer/\n"<<endl;
		cout<<"\t 4 -> delete nomer \t /iztrivane na artikul po nomer/\n"<<endl;
		cout<<"\t 5 -> delete marka \t /iztrivane na artikuli po marka/\n"<<endl;
		cout<<"\t 6 -> print max cena \t /izvejda nai-skupite artikuli/\n"<<endl;
		cout<<"\t 7 -> print vid\t /izvejdane na artikuli po vid/\n"<<endl;
		cout<<"\t 8 -> obshta suma \t /obshtata suma na vsichki artiklu/\n"<<endl;
		cout<<"\t 9 -> print data \t /izvejda artikuli, dostaveni na dadena data/\n"<<endl;
		cout<<"\t 10 -> print mejdu 2 dati \t /izvejda artikuli, polucheni v interval mejdu 2 dadeni dati/\n"<<endl;
		cout<<"\t 11 -> print all \t /izvejda vsichki pratki/\n"<<endl;
		cout<<"\t 12 -> delete all \t /iztriva vsichki danni/\n"<<endl;
		cout<<"  drug simvol -> izhod\n"<<endl;
		cout<<"******************************************************************************************\n";
		cin>>command;
		switch (command)
		{
			case 1: Create(); break;
			case 2: Append(); break;
			case 3: Update(); break;
			case 4: DeleteNomer(); break;
			case 5: DeleteMarka(); break;
			case 6: MaxCena(); break;
			case 7: PrintVid(); break;
			case 8: PrintObshtaSuma(); break;
			case 9: PrintData(); break;
			case 10: PrintIntervalDati(); break;
			case 11: PrintAll(); break;
			case 12: DeleteAll(); break;
			default: command=0; break;
		}
	}
}