import time
from threading import Thread

import PySimpleGUI
from sqlalchemy.orm import sessionmaker

from time_recoder.time_recoder_gui.time_recorder_gui_config import PAUSE_BUTTON_TEXT, START_BUTTON_TEXT, \
    STOP_BUTTON_TEXT, \
    STOP_BUTTON_INTRODUCTION_TEXT, PAUSE_BUTTON_INTRODUCTION_TEXT, WINDOW_SIZE, SELECT_TASK_INTRODUCTION_TEXT, \
    ADD_TASK_INTRODUCTION_TEXT, ADD_TASK_BUTTON_TEXT, NEW_TASK_TEXT_KEY, TASK_TREE_COMBO_NAME, TIMER_KEY
from time_recoder import save_recorded_time_in_table
from time_recoder.time_recoder_gui.time_recorder_task_handler import TaskHandler
from time_recoder.time_recoder_gui.time_recorder_timer import Timer
from time_recoder.time_recorder_database.create_db import ENGINE

Session = sessionmaker(bind=ENGINE)
taskHandler = TaskHandler()
timer = Timer()


def create_layout():
    return [
        [PySimpleGUI.Text(PAUSE_BUTTON_INTRODUCTION_TEXT)],
        [PySimpleGUI.Text(STOP_BUTTON_INTRODUCTION_TEXT)],
        [PySimpleGUI.Button(START_BUTTON_TEXT),
         PySimpleGUI.Button(PAUSE_BUTTON_TEXT),
         PySimpleGUI.Button(STOP_BUTTON_TEXT)],
        [PySimpleGUI.Text('', size=(8, 1), font=('Helvetica', 20), justification='center', key=TIMER_KEY)],
        [PySimpleGUI.Text(SELECT_TASK_INTRODUCTION_TEXT),
         PySimpleGUI.Combo(taskHandler.get_task_tree_name_strings(taskHandler.root_task),
                           size=(30, 1),
                           default_value='root',
                           key=TASK_TREE_COMBO_NAME)],
        [PySimpleGUI.Text(ADD_TASK_INTRODUCTION_TEXT),
         PySimpleGUI.InputText(size=(15, 1), key=NEW_TASK_TEXT_KEY),
         PySimpleGUI.Button(ADD_TASK_BUTTON_TEXT)]
    ]


def create_window(layout):
    return PySimpleGUI.Window('END_TR300 Arbeitserfassungstool ', layout=layout, size=WINDOW_SIZE)


def window_is_closed(event):
    return event == PySimpleGUI.WIN_CLOSED


def stop_button_is_pushed(event):
    return event == STOP_BUTTON_TEXT


def start_button_is_pushed(event):
    return event == START_BUTTON_TEXT


def pause_button_is_pushed(event):
    return event == PAUSE_BUTTON_TEXT


def add_sub_task_button_is_pushed(event):
    return event == ADD_TASK_BUTTON_TEXT


def event_loop(window):
    while True:
        event, values = window.read(timeout=10)
        window[TIMER_KEY].update(timer.get_value_string())
        if window_is_closed(event):
            break
        if start_button_is_pushed(event):
            print('Start Time')
            timer.start()

        if pause_button_is_pushed(event):
            print('Pause Timer Activated')
            timer.pause()

        if stop_button_is_pushed(event):
            worked_time_in_minutes = timer.get_passed_time() / 60
            selected_task_name = window.Element(TASK_TREE_COMBO_NAME).get()
            if selected_task_name:
                current_task = taskHandler.get_task_by_id(taskHandler.get_task_id(selected_task_name))
                current_branch = taskHandler.get_task_branch_as_string(current_task)
                try:
                    save_recorded_time_in_table.save_recorded_time_in_table(worked_time_in_minutes, current_branch)
                    timer.stop()
                    print('Timer stopped recording for task: ' + selected_task_name.strip())
                except PermissionError:
                    print("Error: couldn't write into table file. Please close any program that uses the table" +
                          " and press 'Stop Timer' again")
            else:
                print('Please select a Task before stopping the timer')

        if add_sub_task_button_is_pushed(event):
            sub_task_name = window.Element(NEW_TASK_TEXT_KEY).get()
            sub_task_name_already_in_use = sub_task_name in taskHandler.get_task_tree_name_strings(
                taskHandler.root_task)
            if sub_task_name_already_in_use:
                print('Error: Task name ' + sub_task_name + ' already used, please enter another one')
            elif sub_task_name:
                parent_task_name = window.Element(TASK_TREE_COMBO_NAME).get()
                parent_task_id = taskHandler.get_task_id(parent_task_name)
                print('Adding new Sub-Task: ' + sub_task_name + ' to ' + parent_task_name.strip())
                taskHandler.add_task(parent_task_id, sub_task_name)
                window.Element(TASK_TREE_COMBO_NAME).update(
                    values=taskHandler.get_task_tree_name_strings(taskHandler.root_task))


def gui_main():
    layout = create_layout()
    window = create_window(layout)
    event_loop(window)
    window.close()


if __name__ == '__main__':
    gui_main()
    taskHandler.close_session()