from PyQt5 import QtWidgets, QtCore

from todo.model.tag import Tag, ValidTagForm
import todo.database
import todo.db.task_tags
import todo.gui.tags.panel.dialog

def open(table, update_tag_signal, position):
    rows = set([index.row() for index in table.selectedIndexes()])

    menu = QtWidgets.QMenu(table)

    actions = 0

    if len(rows) == 1:
        modify_action = menu.addAction(todo.gui.icon.dialog_open(menu.style()), "modify")
        actions += 1
    else:
        modify_action = QtWidgets.QAction(menu)

    tags = table.model().row_ids(rows)
    if not todo.db.task_tags.one_is_used(todo.database.cursor(), tags):
        delete_action = menu.addAction(todo.gui.icon.trash(menu.style()), "delete")
        actions += 1
    else:
        delete_action = QtWidgets.QAction(menu)

    if actions > 0:
        action = menu.exec_(table.mapToGlobal(position + QtCore.QPoint(15, 20)))
        if action == modify_action and len(rows) == 1:
            row = list(rows)[0]
            tag = table.model().get_at(row)
            todo.gui.tags.panel.dialog.update(table, update_tag_signal, row, tag).exec_()
        elif action == delete_action:
            todo.gui.tags.panel.dialog.show_delete(table, rows)