from mptt.models import TreeForeignKey, TreeManyToManyField
from datetime import datetime
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, AbstractUser, Group, PermissionsMixin

from specializations.models import Specialization


GENDERS = (
    ('male', 'Мужской'),
    ('female', 'Женский'),
)


class UserManager(BaseUserManager):
    def create_user(self, username, email, password=None, **kwargs):
        if not email:
            raise ValueError('Users must have an email address')
        
        user = self.model(username=username,
                          email=UserManager.normalize_email(email),)
        user.set_password(password)
        user.save(using=self._db)
        return user
    
    def create_superuser(self, username, password):
        user = self.create_user(username, 'admin@exampletest.com', password)
        user.is_superuser = True
        user.save(using=self._db)
        return user


class ContractorUserManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(groups__name='Исполнители')


class CustomerUserManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(groups__name='Заказчики')


class UserFinancialInfo(models.Model):
    RESIDENCIES = (
        ('russian_resident', 'Резидент РФ'),
        ('non_russian_resident', 'Нерезидент РФ'),
        ('refugee', 'Беженец'),
        ('russian_stay_permit', 'Вид на жительство'),
    )
    
    LEGAL_STATUSES = (
        ('individual', 'Физическое лицо'),
        ('legal_entity', 'ИП и юридическое лицо'),
    )
    
    credit_card_number = models.CharField(max_length=50)
    date_of_birth = models.DateTimeField()
    fio = models.CharField(max_length=255)
    inn = models.CharField(max_length=100)
    legal_status = models.CharField(max_length=30, choices=LEGAL_STATUSES)
    passport_issue_date = models.DateTimeField()
    passport_issued_by = models.CharField(max_length=255)
    passport_number = models.CharField(max_length=10)
    passport_scan = models.ImageField(upload_to='users/contractors/')
    passport_series = models.CharField(max_length=6)
    phone = models.CharField(max_length=30)
    residency = models.CharField(max_length=50, choices=RESIDENCIES)
    subdivision_code = models.CharField(max_length=10)
    yandex_money = models.CharField(max_length=50)

    def __str__(self):
        return self.fio

    class Meta:
        verbose_name = 'Финансовая информация'
        verbose_name_plural = 'Финансовая информация'


class ContractorResume(models.Model):
    resume_file = models.FileField(upload_to='users/resume/files/', null=True, blank=True)
    text = models.TextField(null=True, blank=True)

    def __str__(self):
        return self.text

    class Meta:
        verbose_name = 'Резюме'
        verbose_name_plural = 'Резюме'


RESUME_TYPE_FILES = (
    ('diplom', 'Дипломы/Сертификаты'),
    ('cro', 'Допуск CPO'),
)


class ContractorResumeFiles(models.Model):
    description = models.TextField(blank=True)
    img = models.ImageField(upload_to='users/resume/images/')
    resume = models.ForeignKey(ContractorResume, related_name='resume_files')
    title = models.CharField(max_length=255)
    type = models.CharField(max_length=50, choices=RESUME_TYPE_FILES)

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = 'Файлы резюме'
        verbose_name_plural = 'Файлы резюме'


class User(AbstractBaseUser, PermissionsMixin):
    STATUSES = (
        ('free', 'Свободен'),
        ('busy', 'Занят'),
    )
    
    avatar = models.ImageField(upload_to='users/avatars/', blank=True)
    contractor_resume = models.OneToOneField(ContractorResume, related_name='contractor', blank=True, null=True)
    contractor_specializations = TreeManyToManyField(Specialization, related_name='contractors', blank=True)
    contractor_status = models.CharField(default='free', max_length=20, choices=STATUSES)
    created = models.DateTimeField(default=timezone.now)
    cro = models.BooleanField(default=False)
    date_joined = models.DateTimeField(default=timezone.now)
    date_of_birth = models.DateTimeField(null=True, blank=True)
    email = models.EmailField(max_length=255, unique=True, db_index=True)
    financial_info = models.OneToOneField(UserFinancialInfo, related_name='user', blank=True, null=True)
    first_name = models.CharField(max_length=255, blank=True)
    gender = models.CharField(max_length=30, choices=GENDERS, blank=True)
    is_active = models.BooleanField(default=True)
    last_name = models.CharField(max_length=255, blank=True)
    last_time_visit = models.DateTimeField(default=timezone.now)
    location = TreeForeignKey('common.Location', related_name='users', null=True, blank=True)
    patronym = models.CharField(max_length=255, blank=True)
    phone = models.CharField(max_length=30, blank=True, null=True)
    skype = models.CharField(max_length=100, blank=True)
    username = models.CharField(max_length=50, unique=True)
    website = models.CharField(max_length=255, blank=True)

    @property
    def is_staff(self):
        return self.is_superuser

    @property
    def is_free(self):
        return self.contractor_status == 'free'

    def __str__(self):
        return self.email
    
    def get_short_name(self):
        return self.email
    
    def get_full_name(self):
        return self.first_name + ' ' + self.last_name

    def get_profile_image(self):
        return self.avatar

    USERNAME_FIELD = 'username'
    REQUIRED_FIELDS = []
    objects = UserManager()
    contractor_objects = ContractorUserManager()
    customer_objects = CustomerUserManager()
    
    class Meta:
        verbose_name = 'Пользователь'
        verbose_name_plural = 'Пользователи'

    def is_contractor(self):
        return self.groups.filter(name='Исполнители').exists()

    def is_customer(self):
        return self.groups.filter(name='Заказчики').exists()

    def is_owner_profile(self, user_id):
        pass

    def is_owner_team(self):
        return Team.objects.filter(owner=self.pk).exists()


class Team(models.Model):
    created = models.DateTimeField(default=timezone.now)
    name = models.CharField(max_length=255)
    owner = models.OneToOneField(User, related_name='team', blank=True, null=True)
    specializations = TreeManyToManyField(Specialization, related_name='teams', blank=True)
    users = models.ManyToManyField(User, related_name ='teams', blank=True)
    
    def __str__(self):
        return self.name
    
    class Meta:
        verbose_name = 'Команда'
        verbose_name_plural = 'Команды'