from datetime import datetime

from django.core.mail import send_mail
from django import forms
from django.db import transaction
from django.contrib.auth.forms import (
    UserCreationForm,
    UserChangeForm,
)
from django.contrib.auth.forms import PasswordResetForm
from course.models import Program
from .models import User, Student, Parent, RELATION_SHIP, LEVEL


class StaffAddForm(UserCreationForm):
    username = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Username",
        required=False
    )

    first_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="First Name",
    )

    last_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Last Name",
    )

    address = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Address",
    )

    phone = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Mobile No.",
    )

    email = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Email",
    )

    password1 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password",
        required=False
    )

    password2 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password Confirmation",
        required=False
    )

    class Meta(UserCreationForm.Meta):
        model = User

    @transaction.atomic()
    def save(self, commit=True):
        user = super().save(commit=False)
        user.is_lecturer = True
        user.first_name = self.cleaned_data.get("first_name")
        user.last_name = self.cleaned_data.get("last_name")
        user.phone = self.cleaned_data.get("phone")
        user.address = self.cleaned_data.get("address")
        user.email = self.cleaned_data.get("email")

        # Generate a username based on first and last name and registration date
        registration_date = datetime.now().strftime('%Y%m%d%H%M')
        generated_username = f"{user.first_name.lower()}{user.last_name.lower()}{registration_date}"

        # Check if the generated username already exists, and regenerate if needed
        while User.objects.filter(username=generated_username).exists():
            registration_date = datetime.now().strftime('%Y%m%d%H%M')
            generated_username = f"{user.first_name.lower()}{user.last_name.lower()}{registration_date}".replace(" ", "")

        user.username = generated_username

        generated_password = User.objects.make_random_password()
        user.set_password(generated_password)

        if commit:
            user.save()

            # Send email with the generated credentials
            send_mail(
                'Your account credentials',
                f'Your username: {generated_username}\nYour password: {generated_password}',
                'from@example.com',
                [user.email],
                fail_silently=False,
            )

        return user


class StudentAddForm(UserCreationForm):
    username = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={"type": "text", "class": "form-control", "id": "username_id"}
        ),
        label="Username",
        required=False

    )
    address = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Address",
    )

    phone = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Mobile No.",
    )

    first_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="First name",
    )

    last_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Last name",
    )

    level = forms.CharField(
        widget=forms.Select(
            choices=LEVEL,
            attrs={
                "class": "browser-default custom-select form-control",
            },
        ),
    )

    program = forms.ModelChoiceField(
        queryset=Program.objects.all(),
        widget=forms.Select(
            attrs={"class": "browser-default custom-select form-control"}
        ),
        label="Program",
    )

    email = forms.EmailField(
        widget=forms.TextInput(
            attrs={
                "type": "email",
                "class": "form-control",
            }
        ),
        label="Email Address",
    )

    password1 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password",
        required=False

    )

    password2 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password Confirmation",
        required=False
    )

    # def validate_email(self):
    #     email = self.cleaned_data['email']
    #     if User.objects.filter(email__iexact=email, is_active=True).exists():
    #         raise forms.ValidationError("Email has taken, try another email address. ")

    class Meta(UserCreationForm.Meta):
        model = User

    @transaction.atomic()
    def save(self, commit=True):
        user = super().save(commit=False)
        user.is_lecturer = True
        user.first_name = self.cleaned_data.get("first_name")
        user.last_name = self.cleaned_data.get("last_name")
        user.phone = self.cleaned_data.get("phone")
        user.address = self.cleaned_data.get("address")
        user.email = self.cleaned_data.get("email")

        # Generate a username based on first and last name and registration date
        registration_date = datetime.now().strftime('%Y%m%d%H%M')
        generated_username = f"{user.first_name.lower()}{user.last_name.lower()}{registration_date}"

        # Check if the generated username already exists, and regenerate if needed
        while User.objects.filter(username=generated_username).exists():
            registration_date = datetime.now().strftime('%Y%m%d%H%M')
            generated_username = f"{user.first_name.lower()}{user.last_name.lower()}{registration_date}".replace(" ", "")

        user.username = generated_username

        generated_password = User.objects.make_random_password()
        user.set_password(generated_password)

        if commit:
            user.save()

            # Send email with the generated credentials
            send_mail(
                'Your account credentials',
                f'Your username: {generated_username}\nYour password: {generated_password}',
                'from@example.com',
                [user.email],
                fail_silently=False,
            )

        return user


class ProfileUpdateForm(UserChangeForm):
    email = forms.EmailField(
        widget=forms.TextInput(
            attrs={
                "type": "email",
                "class": "form-control",
            }
        ),
        label="Email Address",
    )

    first_name = forms.CharField(
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="First Name",
    )

    last_name = forms.CharField(
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Last Name",
    )

    phone = forms.CharField(
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Phone No.",
    )

    address = forms.CharField(
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Address / city",
    )

    class Meta:
        model = User
        fields = ["email", "phone", "address", "picture", "first_name", "last_name"]


class EmailValidationOnForgotPassword(PasswordResetForm):
    def clean_email(self):
        email = self.cleaned_data["email"]
        if not User.objects.filter(email__iexact=email, is_active=True).exists():
            msg = "There is no user registered with the specified E-mail address. "
            self.add_error("email", msg)
            return email


class ParentAddForm(UserCreationForm):
    username = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Username",
    )
    address = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Address",
    )

    phone = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Mobile No.",
    )

    first_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="First name",
    )

    last_name = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "text",
                "class": "form-control",
            }
        ),
        label="Last name",
    )

    email = forms.EmailField(
        widget=forms.TextInput(
            attrs={
                "type": "email",
                "class": "form-control",
            }
        ),
        label="Email Address",
    )

    student = forms.ModelChoiceField(
        queryset=Student.objects.all(),
        widget=forms.Select(
            attrs={"class": "browser-default custom-select form-control"}
        ),
        label="Student",
    )

    relation_ship = forms.CharField(
        widget=forms.Select(
            choices=RELATION_SHIP,
            attrs={
                "class": "browser-default custom-select form-control",
            },
        ),
    )

    password1 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password",
    )

    password2 = forms.CharField(
        max_length=30,
        widget=forms.TextInput(
            attrs={
                "type": "password",
                "class": "form-control",
            }
        ),
        label="Password Confirmation",
    )

    # def validate_email(self):
    #     email = self.cleaned_data['email']
    #     if User.objects.filter(email__iexact=email, is_active=True).exists():
    #         raise forms.ValidationError("Email has taken, try another email address. ")

    class Meta(UserCreationForm.Meta):
        model = User

    @transaction.atomic()
    def save(self):
        user = super().save(commit=False)
        user.is_parent = True
        user.first_name = self.cleaned_data.get("first_name")
        user.last_name = self.cleaned_data.get("last_name")
        user.address = self.cleaned_data.get("address")
        user.phone = self.cleaned_data.get("phone")
        user.email = self.cleaned_data.get("email")
        user.save()
        parent = Parent.objects.create(
            user=user,
            student=self.cleaned_data.get("student"),
            relation_ship=self.cleaned_data.get("relation_ship"),
        )
        parent.save()
        return user