"""This is the main function"""

from copy import deepcopy
import PySimpleGUI as sg
from tinydb import TinyDB, Query

TABLE=None
WINDOW=None

# Define the window's contents
colum_lut = ["Serial Number","Brand","Grade","Name"]
layout = [[sg.Menu([['File', ['Open', 'Save', 'Add Computer','Remove Computer']]])],
        [sg.Text("search"), sg.Input(s=(35,))],
        [sg.Input(s=(19,),enable_events=True,key="filter Serial Number"),
        sg.Input(s=(6,),enable_events=True,key="filter Brand"),
        sg.Input(s=(6,),enable_events=True,key="filter Grade"),
        sg.Input(s=(4,),enable_events=True,key="filter Name")],
        [sg.Table([["word","Yes"]],colum_lut,key = "table", enable_events=True)],
          [sg.Text("Serial Number")],
          [sg.Input(key='Serial Number')],
          [sg.Text("Brand")],
          [sg.Input(key='Brand')],
          [sg.Text("Grade")],
          [sg.Input(key='Grade')],
          [sg.Text("Name")],
          [sg.Input(key='Name')],
          [sg.Text(size=(40,1), key='OUTPUT')],
          [sg.Button('Check In'), sg.Button('Check Out')]]

add_computer_layout = [[sg.Text("Serial Number")],
          [sg.Input(key='Serial Number')],
          [sg.Text("Brand")],
          [sg.Input(key='Brand')],
          [sg.Text("Grade")],
          [sg.Input(key='Grade')],
          [sg.Text("Name")],
          [sg.Input(key='Name')],
          [sg.Button('Add Computer'),]]

def double_click(event):
    """
    Additional event for double-click on header
    event: class event
    """
    region = TABLE.identify("region", event.x, event.y)
    if region == 'heading':                                 # Only care double-clock on headings
        cid = int(TABLE.identify_column(event.x)[1:])-1     # check which column clicked
        WINDOW.write_event_value("-TABLE-DOUBLE-CLICK-", cid)

def add_computer():
    window = sg.Window('Add Computer', deepcopy(add_computer_layout))
    while True:
        event, values = window.read()
        if event == sg.WINDOW_CLOSED or event == 'Add Computer':
            break
    # Finish up by removing from the screen
    window.close()
    return values

def main():
    """Core of ComputerKeeper - The Main Application."""
    global TABLE,WINDOW
    db= TinyDB("./db.json")
    Computer = []
    for item in db.all():
        The_Device = []
        for colum in colum_lut:
            The_Device.append(item[colum])
        Computer.append(The_Device)
    # Create the window
    window = sg.Window('Window Title', layout, finalize=True)
    WINDOW=window
    window["table"].update(Computer)
    table = window['table'].Widget
    table.bind('<Double-1>', double_click, add='+')
    TABLE=table


    # Display and interact with the Window using an Event Loop
    while True:
        event, values = window.read()
        # See if user wants to quit or window was closed
        if event == sg.WINDOW_CLOSED or event == 'Quit':
            break
        if event == 'Add Computer':
            new_computer = add_computer()
            existing_table = window["table"].get()
            existing_table.append( list(new_computer.values()))
            window["table"].update(existing_table)
            db.insert(new_computer)
        elif event == 'Remove Computer':
            if values["table"]:
                existing_table = window["table"].get()
                serial = existing_table.pop(values["table"][0])[0]
                query = Query()
                db.remove(query["Serial Number"] == serial)
                window["table"].update(existing_table)
        elif event == '-TABLE-DOUBLE-CLICK-':
            column = values[event]
            print(f'Click on column {column}')
            # Sort data on the table by the value of column
            # then update window['-TABLE-'].update(values=new_data)
        else:
            print(event, values[event])
            Computers=Query()
            print(db.search(Computers[event[7:]].find(values[event])!=-1))


    # Finish up by removing from the screen
    window.close()

if __name__ == "__main__":
    main()