import os
import shutil

from flask import render_template
from sqlalchemy.exc import (DatabaseError, DataError, InterfaceError,
                            InvalidRequestError)

from app import db
from distribusisinfo import DistribusisInfo
from forms.admindistribusiform import AdminDistribusiForm
from forms.adminuserform import AdminUserForm
from models.distribusimodel import Distribusis
from models.usermodel import User


def AdminPage():
    adminuserform = AddUsersToForm(AdminUserForm())
    admindistribusiform = AddDistribusisToForm(AdminDistribusiForm())
    if admindistribusiform.validate_on_submit():
        DeleteDistribusis(admindistribusiform)

    if adminuserform.validate_on_submit():
        if adminuserform.delete.data:
            DeleteUsers(adminuserform)
        if adminuserform.tutors.data:
            ToggleUsersAsTutors(adminuserform, True)
        if adminuserform.nottutors.data:
            ToggleUsersAsTutors(adminuserform, False)

    template = render_template(
        "admin.html",
        adminuserform=adminuserform,
        admindistribusiform=admindistribusiform,
    )
    return template


def DeleteUsers(adminuserform):
    for userform in adminuserform:
        if "user" in userform.id:
            if userform.data:
                useremail = userform.label.text
                user = User.query.filter_by(email=useremail).first()
                DeleteUserDistribusis(user)
                DeleteUserFromDb(user)
                userform.errors.append(f"User {useremail} deleted!")


def ToggleUsersAsTutors(adminuserform, is_tutor):
    for userform in adminuserform:
        if "user" in userform.id:
            if userform.data:
                useremail = userform.label.text
                user = User.query.filter_by(email=useremail).first()
                ToggleUserTutorinDb(user, is_tutor)
                userform.errors.append(f"Is User {useremail} tutor {is_tutor}")


def ToggleUserTutorinDb(user, is_tutor):
    try:
        user.tutor = is_tutor
        db.session.commit()
    except (InvalidRequestError, DataError, InterfaceError, DatabaseError):
        db.session.rollback()


def DeleteUserFromDb(user):
    try:
        db.session.delete(user)
        db.session.commit()
    except (InvalidRequestError, DataError, InterfaceError, DatabaseError):
        db.session.rollback()


def DeleteUserDistribusis(user):
    distribusis = DistribusisInfo.getuserdistribusis(user.email)
    for distribusi in distribusis:
        DeleteDistribusiFiles(distribusi.distribusiname)
        DeleteDistribusiFromDb(distribusi)


def DeleteDistribusis(admindistribusiform):
    for distribusiform in admindistribusiform:
        if "distribusi" in distribusiform.id:
            if distribusiform.data:
                distribusiname = distribusiform.label.text
                distribusi = Distribusis.query.filter_by(
                    distribusiname=distribusiname
                ).first()
                DeleteDistribusiFromDb(distribusi)
                DeleteDistribusiFiles(distribusiname)
                distribusiform.errors.append("Deleted distribusi")


def DeleteDistribusiFromDb(distribusi):
    try:
        db.session.delete(distribusi)
        db.session.commit()
    except (InvalidRequestError, DataError, InterfaceError, DatabaseError):
        db.session.rollback()


def DeleteDistribusiFiles(distribusiname):
    userfolder = os.path.join("stash", distribusiname)
    if os.path.exists(userfolder):
        shutil.rmtree(userfolder)
    cssfolder = os.path.join("themes/userthemes", distribusiname)
    if os.path.exists(cssfolder):
        shutil.rmtree(cssfolder)


def AddDistribusisToForm(admindistribusiform):
    distribusis = DistribusisInfo.visibledistribusis()
    admindistribusiform = AdminDistribusiForm.distribusi_list_form_builder(
        distribusis
    )
    return admindistribusiform


def AddUsersToForm(adminuserform):
    users = User.query.all()
    adminuserform = AdminUserForm.user_list_form_builder(users)
    return adminuserform