"""This is the main function"""

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

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,), enable_events=True,key="search")],
        [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, expand_x = True, expand_y =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 format_table(table_list):
    Computer = []
    for item in table_list:
        The_Device = []
        for colum in colum_lut:
            The_Device.append(item[colum])
        Computer.append(The_Device)
    return Computer

def main():
    """Core of ComputerKeeper - The Main Application."""
    global TABLE,WINDOW
    db= TinyDB("./db.json")
    computer = format_table(db.all())
    # Create the window
    window = sg.Window('Computer Keeper', layout, finalize=True, icon=COMPUTER_KEEPER_LOGO, resizable = 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)
        elif event.find("filter") != -1:
            filter_database = lambda s: s.lower().find(values[event].lower()) != -1
            Computers=Query()
            result=db.search(Computers[event[7:]].test(filter_database))
            window["table"].update(format_table(result))

        elif event == "search":
            filter_database = lambda s: s.lower().find(values[event].lower()) != -1
            Computers=Query()
            result=db.search(
                Computers["Serial Number"].test(filter_database)|
                Computers["Brand"].test(filter_database)|
                Computers["Grade"].test(filter_database)|
                Computers["Name"].test(filter_database)
            )
            window["table"].update(format_table(result))

        elif event == "table" and values["table"]:
            row=window["table"].get()[values["table"][0]]
            window["Serial Number"].update(row[0])
            window["Brand"].update(row[1])
            window["Grade"].update(row[2])
            window["Name"].update(row[3])

        elif event == "Check Out":
            SN = window["Serial Number"].get()
            G = window["Grade"].get()
            N = window["Name"].get()
            Table = window["table"].get()
            print(Table)
            for row in Table:
                if SN == row[0]:
                    row[2] = G
                    row[3] = N
            window["table"].update(Table)
            query=Query()
            db.update({"Grade": G, "Name": N}, query["Serial Number"] == SN)
 

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

if __name__ == "__main__":
    main()