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

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


def get_time():
    return (datetime.now() - datetime(1970, 1, 1)).total_seconds() + time.timezone  # timezone so we get utc time!


def add_item_dialog():
    input_field = tk.Tk()
    input_field.title("Add Item")

    input_window_width = 640
    input_window_height = 320

    # find the center point
    input_center_x = int(screen_width / 2 - input_window_width / 2)
    input_center_y = int(screen_height / 2 - input_window_height / 2)

    input_field.geometry(f'{input_window_width}x{input_window_height}+{input_center_x}+{input_center_y}')

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

    input_confirm = tk.Button(input_field, text="Confirm", command=lambda: add_item(entry, input_field))
    input_confirm.pack(side=tk.BOTTOM, padx=5, pady=5)
    input_field.mainloop()


def add_item(entry, input_field):
    item = entry.get()
    print("a")
    if item:
        listbox.insert(tk.END, item)
        cur.execute("INSERT INTO todo(\"ID\",\"TODO\",\"CREATION_DATE\",\"DUE_DATE\",\"PRIO\",\"IMP\") VALUES (NULL, "
                    "'%s', '%s','%s', '%s', '%s' )" % (item, get_time(), get_time(), 100, 0))
        con.commit()
        input_field.destroy()


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 = get_time()

    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")

# get the screen dimension
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()

window_width = 1280
window_height = 720

# find the center point
center_x = int(screen_width / 2 - window_width / 2)
center_y = int(screen_height / 2 - window_height / 2)

# set the position of the window to the center of the screen
root.geometry(f'{window_width}x{window_height}+{center_x}+{center_y}')

root.minsize(window_width, window_height)  # prevent making it smaller than min size

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

# Create buttons to add and remove items
add_button = tk.Button(root, text="Add", command=add_item_dialog)
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()