"""
A Program that storess book information
"""
from tkinter import *
from backend import Database

database = Database("books.db")



def get_selected_row(event):
    try:
        global selected_tuple
        index=list1.curselection()[0]
        selected_tuple=list1.get(index)
        e1.delete(0,END)
        e1.insert(END,selected_tuple[1])
        e2.delete(0,END)
        e2.insert(END,selected_tuple[2])
        e3.delete(0,END)
        e3.insert(END,selected_tuple[3])
        e4.delete(0,END)
        e4.insert(END,selected_tuple[4])
    except IndexError:
        pass
def view_command():
    list1.delete(0, END)
    for row in database.view():
        list1.insert(END,row)        

def search_command():
    list1.delete(0,END)
    for row in database.search(title_text.get(),author_text.get(),year_text.get(),isbn_text.get()):
        list1.insert(END,row)

def add_command():
    database.insert(title_text.get(),author_text.get(),year_text.get(),isbn_text.get())
    list1.delete(0,END)
    list1.insert(END,(title_text.get(),author_text.get(),year_text.get(),isbn_text.get()))

def delete_command():
    database.delete(selected_tuple[0])

def update_command():
    database.update(selected_tuple[0],title_text.get(),author_text.get(),year_text.get(),isbn_text.get())


window =Tk()

l1 = Label(window, text="Title")
l1.grid(row = 0, column = 0)

l1 = Label(window, text="Author")
l1.grid(row = 0, column = 2)

l1 = Label(window, text="Year")
l1.grid(row = 1, column = 0)

l1 = Label(window, text="ISBN")
l1.grid(row = 1, column = 2)


title_text = StringVar()
e1 = Entry(window, textvariable = title_text )
e1.grid(row=0,column=1)

year_text = StringVar()
e2 = Entry(window, textvariable = year_text )
e2.grid(row=0,column=3)

author_text = StringVar()
e3 = Entry(window, textvariable = author_text )
e3.grid(row=1,column=1)

isbn_text = StringVar()
e4 = Entry(window, textvariable = isbn_text )
e4.grid(row=1,column=3)

window.wm_title("BookStore")

list1 = Listbox(window, height=6, width=35)
list1.grid(row=2,column=0, rowspan=6, columnspan =2)

sb1 =Scrollbar(window)
sb1.grid(row=2,column=2,  rowspan=6)

list1.configure(yscrollcommand=sb1.set)
sb1.configure(command=list1.yview)

list1.bind('<<ListboxSelect>>',get_selected_row)


b1 = Button(window,text="View All" , width=12,command=view_command)
b1.grid(row=2,column=3)

b2 = Button(window,text="Search Entry" , width=12, command = search_command)
b2.grid(row=3,column=3)

b3 = Button(window,text="Add Entry" , width=12 ,command=add_command)
b3.grid(row=4,column=3)

b4 = Button(window,text="Update Selected" , width=12 ,command=update_command)
b4.grid(row=5,column=3)

b5 = Button(window,text="Delete Selected" , width=12, command=delete_command)
b5.grid(row=6,column=3)

b6 = Button(window,text="Close" , width=12,command=window.destroy)
b6.grid(row=7,column=3)


window.mainloop()