from _ast import Global

import sqlite3
from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import QLineEdit, QMessageBox

from database import IntegrityError
from globals import Global
from model.member import Member
from utils.editable_title_widget import EditableTitle
from utils.members_table import MembersTable
from utils.qtmodels.distributions_tree_model import DistributionTreeModel
from windows import groupedit
from PyQt5 import QtWidgets as Qt


class GroupEdit(Qt.QWidget, groupedit.Ui_Form):
    def __init__(self, main_window, group, parent=None):
        """
        Cotnroller of group edit window
        :param main_window: main application window
        :param group: (Group) group to be displayed  
        :param parent: 
        """
        super(GroupEdit, self).__init__(parent)
        self.setupUi(self)
        self.main_window = main_window

        self.group = group
        self.membersTable = MembersTable(num_of_buttons=2, button_titles=("View", "-",), data=group.members)
        self.updateMemberCount()
        self.layoutMembers.addWidget(self.membersTable)
        self.treeDistributions.setModel(DistributionTreeModel(group.distributions))

        title = EditableTitle(group.name, self)
        self.layoutName.replaceWidget(self.widgetTitle, title)
        self.widgetTitle = title

        # signals
        self.btnDelete.clicked.connect(self.deleteGroup)
        self.btnAddNew.clicked.connect(self.addNewMember)
        self.editNewMemberName.returnPressed.connect(self.addNewMember)
        self.btnDistribute.clicked.connect(self.distribute)
        self.membersTable.btnClicked.connect(self.onTableMembersBtnClicked)
        self.membersTable.itemDoubleClicked.connect(self.goToMemberOverview)
        self.widgetTitle.textConfirmed.connect(self.changeGroupName)

    def reloadData(self):
        self.group = Global.db.getGroupById(self.group.id_)
        self.membersTable.changeData(self.group.members)
        self.updateMemberCount()
        self.treeDistributions.setModel(DistributionTreeModel(self.group.distributions))

    @pyqtSlot(str)
    def changeGroupName(self, name):
        try:
            self.group.rename(name)
        except IntegrityError as e:
            msg = QMessageBox(self)
            msg.setIcon(QMessageBox.Critical)
            msg.setText("Skupina s tímto jménem již existuje")
            msg.setWindowTitle(self.tr("Nelze přejmenovat skupinu"))
            msg.setStandardButtons(QMessageBox.Ok)
            msg.exec()
            self.widgetTitle.editMode()

    @pyqtSlot()
    def deleteGroup(self):
        """
        Show confirmation prompt and delete group + go back after 
        """
        msg = Qt.QMessageBox(self)
        msg.setIcon(Qt.QMessageBox.Question)
        msg.setWindowTitle(self.tr("Opravdu?"))
        msg.setText(self.tr("Opravdu chcete smazat skupinu " + self.group.name + "?"))
        msg.setStandardButtons(Qt.QMessageBox.Ok | Qt.QMessageBox.Cancel)
        if msg.exec() == Qt.QMessageBox.Ok:
            self.group.delete()
            self.main_window.dataChanged()
            self.main_window.goBack()

    @pyqtSlot()
    def addNewMember(self):
        """
        Add member specified in self.editNewMemberName and self.editNewMemberSurname
        """
        name = self.editNewMemberName.text()
        try:
            self.group.addMember(name)
        except IntegrityError as e:
            msg = QMessageBox(self)
            msg.setIcon(QMessageBox.Critical)
            msg.setText(self.tr("Tento člen již v této skupině existuje."))
            msg.setWindowTitle(self.tr("Nelze přidat člena"))
            msg.setStandardButtons(QMessageBox.Ok)
            msg.exec()
        finally:
            # prepare for inserting another one
            self.editNewMemberName.clear()
            self.editNewMemberName.setFocus()

        self.membersTable.changeData(self.group.members)
        self.updateMemberCount()

    def updateMemberCount(self):
        """
        Updates member count label 
        """
        self.lblMemberCount.setText(str(self.group.member_count))

    @pyqtSlot()
    def distribute(self):
        """
        go to distribution setup for this group
        """
        self.main_window.goToDistributionSetup(self.group)

    @pyqtSlot(Member, int)
    def onTableMembersBtnClicked(self, member, btn_nr):
        """
        Slot for buttons from tableMembers
        :param member: 
        :param btn_nr: 
        """
        if btn_nr == 0:
            self.goToMemberOverview(member)
        elif btn_nr == 1:
            self.deleteMember(member)

    def goToMemberOverview(self, member):
        """
        go to member overview
        :param member: 
        """
        self.main_window.goToMemberOverview(member)

    def deleteMember(self, member):
        """
        delete member
        :param member:
        """
        # TODO: full/partial delete?
        member.delete()
        self.main_window.dataChanged()
        self.reloadData()