import sqlite3
from datetime import datetime
import time
import tkinter as tk

con = sqlite3.connect("todo.db")
cur = con.cursor()


def add_item():
    item = entry.get()
    if item:
        listbox.insert(tk.END, item)
        entry.delete(0, tk.END)  # deletes input


def remove_item():
    selected_index = listbox.curselection()
    if selected_index:
        listbox.delete(selected_index)


def update_list():
    listbox.delete(0,listbox.size()) # clear listbox
    cur_time = (datetime.now() - datetime(1970, 1, 1)).total_seconds() + time.timezone

    total_time = []
    remaining_time = []
    importance = []

    res = cur.execute("SELECT * FROM todo").fetchall()
    for i, tmp1 in enumerate(res):
        total_time.append(res[i][3] - res[i][2])
        remaining_time.append(res[i][3] - cur_time)
        importance.append(total_time[i] / remaining_time[i] * res[i][4])
        if int(importance[i]) == 0:
            importance[i] = 1
        print("UPDATE todo SET IMP = %s WHERE ID = %s" % (int(importance[i]), i + 1))
        cur.execute("UPDATE todo SET IMP = %s WHERE ID = %s" % (int(importance[i]), i + 1))
        print(i)
        listbox.insert(tk.END, res[i][1])
    con.commit()


# Create the main window
root = tk.Tk()
root.title("Ion-Todo-Planner")

# Create a listbox to display the items
listbox = tk.Listbox(root, width=100)
listbox.pack(padx=5, pady=5)


# Create an entry for adding items
entry = tk.Entry(root, width=50)
entry.pack(padx=10, pady=5)

# Create buttons to add and remove items
add_button = tk.Button(root, text="Add", command=add_item)
add_button.pack(side=tk.LEFT, padx=5, pady=5)

remove_button = tk.Button(root, text="Remove", command=remove_item)
remove_button.pack(side=tk.LEFT, padx=5, pady=5)

update_button = tk.Button(root, text="Update", command=update_list)
update_button.pack(side=tk.LEFT, padx=5, pady=5)

# Run the Tkinter event loop
root.mainloop()