.MODEL SMALL
.DATA
    MSG1 DB 13,10, "--------------------------------------------", 13,10
         DB "--  WELCOME TO LIBRARY MANAGEMENT SYSTEM  --", 13,10
         DB "--------------------------------------------", 13,10,13,10
         DB "1-> Register a Member", 13,10
         DB "2-> View Members", 13,10
         DB "3-> View Members From  File", 13,10
         DB "4-> Add Book", 13,10
         DB "5-> View Books", 13,10
         DB "6-> View Books From Files", 13,10
         DB "7-> Exit Program", 13,10
         DB "Choose Your Option : $"

    REG_MSG DB 13,10, "Enter Member's Name to register: $"
    VIEW_MEMBERS_MSG DB 10,13, "Viewing Registered Members: $"
    ADD_MSG DB 13,10, "Enter Book Name & Author Name to Add (Separated By Comma): $"
    VIEW_BOOKS_MSG DB 10,13, "Viewing Books in Library: $"
    EXIT_MSG DB 10,13, "----------------- ", 13,10
             DB "Exiting Program...", 13,10
             DB "See you again  :')", 13,10
             DB "------------------$"

    MEMBERS_FILE DB "MEMBERS.txt", 0
    BOOKS_FILE DB "BOOKS.txt", 0
    BUFFER_SIZE EQU 5000
    BUFFER_MEM DB BUFFER_SIZE DUP(?)
    BUFFER_BOOK DB BUFFER_SIZE DUP(?)
    bytesRead DW ?
    REGISTER DW 1
    VIEW_MEMBERS DW 2
    VIEW_MF DW 3
    ADD_BOOK DW 4
    VIEW_BOOKS DW 5
    VIEW_BF DW 6
    EXITP DW 7
    MEMBER_SIZE EQU 20
    MEMBERS DB MEMBER_SIZE DUP(?)
    NUM_MEMBERS DW ?

    BOOK_SIZE EQU 30
    BOOKS DB BOOK_SIZE DUP(?)
    NUM_BOOKS DW ?

.CODE
MAIN PROC
    MOV AX, @DATA
    MOV DS, AX

START:
    MOV AH, 9
    LEA DX, MSG1
    INT 21h
    
    MOV AH, 1
    INT 21h
    SUB AL, 30h  ; Convert ASCII to integer

    ; Handle user input
    CMP AL, '1'  ; Check if the user selected option 1
    JE REG_M
    CMP AL, '2'  ; Check if the user selected option 2
    JE VIEW_M
    CMP AL, '7'  ; Check if the user selected option 7
    JE EXIT_MENU

    JMP START

REG_M:
    ; Register a member
    MOV AH, 9
    LEA DX, REG_MSG
    INT 21h
    
    ; Set up registers for reading input
    MOV AH, 0Ah      ; Function to read string
    MOV DX, OFFSET MEMBERS  ; Offset of buffer to store input
    INT 21h
    
    ; Increment NUM_MEMBERS
    INC NUM_MEMBERS

    JMP START

VIEW_M:
    ; View registered members
    MOV AH, 9
    LEA DX, VIEW_MEMBERS_MSG
    INT 21h

    ; Display registered members
    MOV CX, NUM_MEMBERS    ; Counter for the number of registered members
    MOV SI, OFFSET MEMBERS    ; Point SI to the start of the MEMBERS buffer

PRINT_MEMBER:
    MOV AH, 2    ; Print character function
    MOV DL, [SI]    ; Load character to print from MEMBERS buffer
    INT 21h

    INC SI    ; Move to the next character in MEMBERS buffer
    DEC CX    ; Decrement the counter
    LOOP PRINT_MEMBER  ; Repeat until all members are printed

    JMP START

EXIT_MENU:
    ; Exit program
    MOV AH, 9
    LEA DX, EXIT_MSG
    INT 21h

    MOV AH, 4Ch
    INT 21h

MAIN ENDP

READINT PROC
    MOV AH, 01h
    INT 21h
    SUB AL, 30h  ; Convert ASCII to integer
    RET
READINT ENDP
END MAIN