from PyQt5 import QtCore, QtWidgets
from typing import List

from model.tag import Tag
from model.task import Task, ValidTaskForm
import database
import db.task_tags
import db.tasks
import gui.tasks.form.widget
import service.tasks

def add(parent_widget, add_task_signal):

    def on_add(task_form: ValidTaskForm):
        task = service.tasks.create(database.cursor(), task_form)
        add_task_signal.emit(task, task_form.tags)

    return widget(parent_widget, 'Add a task', 'add', None, [], on_add)

def update(parent_widget, update_task_signal, row: int, task: Task, tags: List[int]):

    def on_update(task_form: ValidTaskForm):
        updated_task = service.tasks.update(database.cursor(), task, task_form)
        update_task_signal.emit(row, updated_task, task_form.tags)

    return widget(parent_widget, 'Modify a task', 'modify', task, tags, on_update)

def show_delete(parent, rows: List[int], on_delete):
    confirm = QtWidgets.QMessageBox.question(
        parent,
        'Task deletion',
        'Do you really want to delete the selected tasks ?',
        QtWidgets.QMessageBox.No | QtWidgets.QMessageBox.Yes,
        QtWidgets.QMessageBox.Yes)

    if confirm == QtWidgets.QMessageBox.Yes:
        on_delete()

def widget(
        parent: QtWidgets.QWidget,
        title: str,
        action_title: str,
        task: Task,
        tags: List[int],
        on_validated):

    dialog = QtWidgets.QDialog(parent)
    dialog.setWindowTitle(title)
    dialog.setMinimumSize(QtCore.QSize(320, 240))

    layout = QtWidgets.QVBoxLayout(dialog)
    dialog.setLayout(layout)

    def on_dialog_validated(form):
        dialog.accept()
        on_validated(form)

    layout.addWidget(gui.tasks.form.widget.widget(
        parent = dialog,
        action_title = action_title,
        task = task,
        tags = tags,
        on_validated = on_dialog_validated,
        on_cancel = lambda: dialog.reject()))

    return dialog