#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <stdlib.h>
#include <windows.h>

struct student
{
    char ID[15];
    char name[20];
    char add[50];
    char parname[50];
    char semister[10];
    long unsigned int phone_no;
};

struct student stu;

///This will set the forground color for printing in a console window.
void SetColor(int ForgC)
{
    WORD wColor;
    ///We will need this handle to get the current background attribute
    HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    CONSOLE_SCREEN_BUFFER_INFO csbi;

    ///We use csbi for the wAttributes word.
    if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
    {
        ///Mask out all but the background attribute, and add in the forgournd color
        wColor = (csbi.wAttributes & 0xF0) + (ForgC & 0x0F);
        SetConsoleTextAttribute(hStdOut, wColor);
    }
    return;
}

void ClearConsoleToColors(int ForgC, int BackC)
{
    WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);
    ///Get the handle to the current output buffer...
    HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    ///This is used to reset the carat/cursor to the top left.
    COORD coord = {0, 0};
    ///A return value... indicating how many chars were written
    ///   not used but we need to capture this since it will be
    ///   written anyway (passing NULL causes an access violation).
    DWORD count;
    ///This is a structure containing all of the console info
    /// it is used here to find the size of the console.
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    ///Here we will set the current color
    SetConsoleTextAttribute(hStdOut, wColor);
    if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
    {
        ///This fills the buffer with a given character (in this case 32=space).
        FillConsoleOutputCharacter(hStdOut, (TCHAR) 32, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
        FillConsoleOutputAttribute(hStdOut, csbi.wAttributes, csbi.dwSize.X * csbi.dwSize.Y, coord, &count );
        ///This will set our cursor position for the next print statement.
        SetConsoleCursorPosition(hStdOut, coord);
    }
    return;
}

void SetColorAndBackground(int ForgC, int BackC)
{
    WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);;
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), wColor);
    return;
}

COORD coord = {0,0}; ///set the cordinate to 0, 0 (top-left corner of window);
void gotoxy(int x, int y)
{
    coord.X = x;
    coord.Y = y; /// X and Y coordinates
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

void drawRectangle()
{
    int i, j;
    gotoxy(0,0);
    printf("%c",201);
    for(i = 1; i < 78; i++)
    {
        gotoxy(i, 0);
        printf("%c",205);
    }
    gotoxy(78,0);
    printf("%c",187);
    for(i = 1; i < 25; i++)
    {
        gotoxy(78, i);
        if(i == 6)
        {
            printf("%c",185);
        }
        else
        {
            printf("%c",186);
        }
    }
    gotoxy(78, 25);
    printf("%c",188);
    for(i = 77; i > 0; i--)
    {
        gotoxy(i,25);
        if(i == 35)
        {
            printf("%c",202);
        }
        else
        {
            printf("%c",205);
        }
    }
    gotoxy(0,25);
    printf("%c",200);
    for(i = 24; i > 0; i--)
    {
        gotoxy(0,i);
        if(i == 6)
        {
            printf("%c",204);
        }
        else
        {
            printf("%c",186);
        }
    }

    for(i = 1; i < 78; i++)
    {
        gotoxy(i,6);
        if(i == 35)
        {
            printf("%c",203);
        }
        else
        {
            printf("%c",205);
        }
    }

    for(i = 7; i < 25; i++)
    {
        gotoxy(35,i);
        printf("%c",186);
    }

}

void clearWindow()
{
    int i,j;
    for(i = 37; i < 78; i++)
    {
        for(j = 7; j < 25; j++)
        {
            gotoxy(i,j);
            printf(" ");
        }
    }
    return;
}

void window()
{
    drawRectangle();
    gotoxy(28,2);
    SetColor(35);
    printf("STUDENT RECORD SYSTEM");
    gotoxy(20,3);
    printf("ENTER University Of Science & Technology ,Bangladesh");
    gotoxy(31,4);
    printf("Depertment of CSE.");
    gotoxy(25,24);
    SetColor(17);

}



void print_heading(const char st[])
{
    SetColorAndBackground(31,28);
    gotoxy(45,8);
    printf("SRS : %s",st);
    SetColorAndBackground(17,15);
}



void add_student()
{
    clearWindow();
    print_heading("Add Record");
    int print = 37;
    FILE *fp;
    fp = fopen("record.txt","ab+");
    SetColor(45);
    if(fp == NULL)
    {
        MessageBox(0,"Error in Opening file\nMake sure your file is not write protected","Warning",0);

    }
    else
    {
        fflush(stdin);
        gotoxy(print,10);
        printf("ID: ");
        gets(stu.ID);
        //here you can confirms the ID
        gotoxy(print,12);
        printf("Name: ");
        gets(stu.name);
        gotoxy(print,14);
        printf("Address: ");
        gets(stu.add);
        gotoxy(print,16);
        printf("Parent's name: ");
        gets(stu.parname);
        gotoxy(print,18);
        printf("Semister: ");
        gets(stu.semister);
        gotoxy(print,20);
        printf("Phone Number: ");
        scanf("%ld",&stu.phone_no);
        fwrite(&stu, sizeof(stu), 1, fp);
        gotoxy(40,22);
        printf("The record is sucessfully added");
    }
    SetColor(28);
    fclose(fp);
    return;
}

void search_student()
{
    clearWindow();
    print_heading("Search Record");
    SetColor(45);
    char s_id[15];
    int isFound = 0;
    gotoxy(37,10);
    printf("Enter ID to Search: ");
    fflush(stdin);
    gets(s_id);
    FILE *fp;
    fp = fopen("record.txt","rb");
    while(fread(&stu,sizeof(stu),1,fp) == 1)
    {
        if(strcmp(s_id,stu.ID) == 0)
        {
            isFound = 1;
            break;
        }
    }
    if(isFound == 1)
    {
        gotoxy(37,12);
        printf("The record is Found");
        gotoxy(37,14);
        printf("ID: %s",stu.ID);
        gotoxy(37,15);
        printf("Name: %s",stu.name);
        gotoxy(37,16);
        printf("Address: %s",stu.add);
        gotoxy(37,17);
        printf("Parent's Name: %s",stu.parname);
        gotoxy(37,18);
        printf("Semister: %s",stu.semister);
        gotoxy(37,19);
        printf("Phone No: %ld",stu.phone_no);
    }
    else
    {
        gotoxy(37,12);
        printf("Sory, No record found in the database");
    }
    SetColor(28);
    fclose(fp);
    return;
}

void mod_student()
{
    clearWindow();
    print_heading("Modify Record");
    SetColor(45);
    char s_id[15];
    int isFound = 0, print = 37;
    gotoxy(37,10);
    printf("Enter ID to Modify: ");
    fflush(stdin);
    gets(s_id);
    FILE *fp;
    fp = fopen("record.txt","rb+");
    while(fread(&stu, sizeof(stu),1,fp) == 1)
    {
        if(strcmp(s_id, stu.ID) == 0)
        {
            fflush(stdin);
            gotoxy(print,12);
            printf("ID: ");
            gets(stu.ID);
            gotoxy(print,13);
            printf("Name: ");
            gets(stu.name);
            gotoxy(print,14);
            printf("Address: ");
            gets(stu.add);
            gotoxy(print,15);
            printf("Parent's name: ");
            gets(stu.parname);
            gotoxy(print,16);
            printf("Semister ");
            gets(stu.semister);
            gotoxy(print,17);
            printf("Phone Number: ");
            scanf("%ld",&stu.phone_no);
            fseek(fp,-sizeof(stu), SEEK_CUR);
            fwrite(&stu,sizeof(stu), 1, fp);
            isFound = 1;
            break;
        }
    }
    if(!isFound)
    {
        gotoxy(print, 12);
        printf("No Record Found");
    }
    fclose(fp);
    SetColor(28);
    return;
}



void delete_student()
{
    clearWindow();
    print_heading("Delete Record");
    SetColor(45);
    char s_id[15];
    int isFound = 0, print = 37;
    gotoxy(37,10);
    printf("Enter ID to Modify: ");
    fflush(stdin);
    gets(s_id);
    FILE *fp, *temp;
    fp = fopen("record.txt","rb");
    temp = fopen("temp.txt", "wb");
    while(fread(&stu, sizeof(stu),1,fp) == 1)
    {
        if(strcmp(s_id, stu.ID) == 0)
        {
            fwrite(&stu,sizeof(stu),1,temp);
        }
    }
    fclose(fp);
    fclose(temp);
    remove("record.txt");
    rename("temp.txt","record.txt");
    gotoxy(37,12);
    printf("The record is sucessfully deleted");
    SetColor(28);
    return;
}

void main_window()
{
    int choice;
    SetColor(28);
    int x = 2;
    while(1)
    {
        gotoxy(x,8);
        printf("1. Add Student");
        gotoxy(x,10);
        printf("2. Search Student");
        gotoxy(x,12);
        printf("3. Modify Student Record");
        gotoxy(x,14);
        printf("4. Delete Student Record");
        gotoxy(x,16);
        printf("5. Exit");
        gotoxy(x,18);
        printf("Enter your choice: ");
        scanf("%d",&choice);
        switch(choice)
        {
        case 1:
            add_student();
            break;
        case 2:
            search_student();
            break;
        case 3:
            mod_student();
            break;

        case 4:
            delete_student();
            break;

        case 5:
            exit(0);
            break;
        default:
            break;
        }

    }

}

int main()
{
    ClearConsoleToColors(17,15);
    SetConsoleTitle("Student Record sysytem using  C programming");
    window();
    //use_pass_field();
    main_window();
    return 0;
}