from flask import flash
from flask_admin import expose
from flask_admin.contrib.sqla.fields import QuerySelectField, QuerySelectMultipleField
from flask_security import admin_change_password, current_user
from sqlalchemy import and_
from wtforms import BooleanField, Form, RadioField, SelectField, StringField
from wtforms.fields import DateField
from wtforms.validators import NumberRange, Optional

from . import assistantSpace, db
from .advlabdb_independent_funs import flashRandomPassword, randomPassword
from .customClasses import SecureAssistantBaseView, SecureAssistantModelView
from .exceptions import DataBaseException, ModelViewException
from .model_dependent_funs import initActiveSemesterMenuLinks
from .models import (
    MAX_MARK,
    MIN_MARK,
    Appointment,
    Assistant,
    Experiment,
    ExperimentMark,
    Group,
    GroupExperiment,
    Part,
    PartStudent,
    Program,
    Role,
    Semester,
    SemesterExperiment,
    Student,
    User,
)


class AssistantAppointmentView(SecureAssistantModelView):
    can_edit = True

    column_list = [
        "date",
        "special",
        "group_experiment.semester_experiment.experiment",
        "group_experiment.group",
        "group_experiment.group.part_students",
    ]
    column_labels = {
        "group_experiment.semester_experiment.experiment": "Experiment",
        "group_experiment.group": "Group",
        "group_experiment.group.part_students": "Students",
    }

    column_editable_list = [
        "date",
    ]
    form_columns = column_editable_list

    def query_modifier(self, query):
        return (
            query.join(GroupExperiment)
            .join(SemesterExperiment)
            .where(
                SemesterExperiment.semester == current_user.active_semester,
                Appointment.assistant == current_user.assistant,
            )
        )


class AssistantExperimentMarkView(SecureAssistantModelView):
    can_edit = True

    column_list = [
        "oral_mark",
        "protocol_mark",
        "final_experiment_mark",
        "group_experiment.semester_experiment.experiment",
        "part_student.student.first_name",
        "part_student.student.last_name",
        "part_student.group",
        "part_student.student.uni_email",
        "part_student.student.contact_email",
        "part_student.part",
        "assistant",
        "admin",
    ]
    column_labels = {
        "group_experiment.semester_experiment.experiment": "Experiment",
        "part_student.student.first_name": "First Name",
        "part_student.student.last_name": "Last Name",
        "part_student.group": "Group",
        "part_student.student.uni_email": "Uni Email",
        "part_student.student.contact_email": "Contact Email",
        "part_student.part": "Part",
    }
    column_descriptions = {
        "oral_mark": f"Between {MIN_MARK} and {MAX_MARK}",
        "protocol_mark": f"Between {MIN_MARK} and {MAX_MARK}",
        "final_experiment_mark": "Calculated automatically with oral and protocol marks and weightings",
        "part_student.student.contact_email": "The preferred contact email address if entered by the student",
        "assistant": "The last assistant who edited the mark",
        "admin": "The last admin who edited the mark",
    }

    column_editable_list = [
        "oral_mark",
        "protocol_mark",
    ]
    form_columns = column_editable_list

    form_args = {
        "oral_mark": {"validators": [NumberRange(MIN_MARK, MAX_MARK)]},
        "protocol_mark": {"validators": [NumberRange(MIN_MARK, MAX_MARK)]},
    }

    column_default_sort = [("oral_mark", False), ("protocol_mark", False)]

    def query_modifier(self, query):
        return (
            query.join(GroupExperiment)
            .join(SemesterExperiment)
            .where(SemesterExperiment.semester == current_user.active_semester)
            .join(SemesterExperiment.assistants)
            .where(Assistant.user == current_user)
        )

    def update_model(self, form, model):
        if (form.oral_mark is not None and form.oral_mark.data != model.oral_mark) or (
            form.protocol_mark is not None and form.protocol_mark.data != model.protocol_mark
        ):
            model.assistant = current_user.assistant

            updateSuccessful = super().update_model(form, model)

            model.part_student.checkThenSetFinalPartMark()

            return updateSuccessful
        else:
            # Nothing changed
            return True


class AssistantUserView(SecureAssistantModelView):
    class EditForm(Form):
        phone_number = StringField(
            "Phone Number",
            validators=[Optional()],
        )
        mobile_phone_number = StringField(
            "Mobile Phone Number",
            validators=[Optional()],
        )

        building = StringField(
            "Building",
            validators=[Optional()],
        )
        room = StringField(
            "Room",
            validators=[Optional()],
        )

        generate_new_password = BooleanField(
            "Generate new random password. For security reasons, it is not possible to manually enter a password. Please use a password manager like Bitwarden or KeepassXC to save the randomly generated password.",
            default=False,
        )

    can_edit = True
    column_display_actions = True

    column_sortable_list = []

    column_list = [
        "email",
        "phone_number",
        "mobile_phone_number",
        "building",
        "room",
        "assistant.semester_experiments",
    ]
    column_labels = {
        "assistant.semester_experiments": "Semester Experiments",
    }

    def query_modifier(self, query):
        return query.where(User.id == current_user.id)

    def on_model_change(self, form, model, is_created):
        if form.generate_new_password.data:
            password = randomPassword()
            flashRandomPassword(password)

            admin_change_password(model, password, notify=False)  # Password is automatically hashed with this function


class AssistantDocsView(SecureAssistantBaseView):
    @expose("/")
    def index(self):
        return self.render("docs/assistant.html")


assistantSpace.add_view(
    AssistantAppointmentView(Appointment, db.session, endpoint="assistant_appointment", url="appointment")
)
assistantSpace.add_view(
    AssistantExperimentMarkView(ExperimentMark, db.session, endpoint="assistant_experimentmark", url="experimentmark")
)
assistantSpace.add_view(AssistantUserView(User, db.session, endpoint="assistant_user", url="user"))
assistantSpace.add_view(AssistantDocsView(name="Docs", endpoint="assistant_docs", url="docs"))

initActiveSemesterMenuLinks(assistantSpace)