import uuid
from django.contrib.auth.models import User
from django.db import models
from django.core.validators import RegexValidator

phone_regex = RegexValidator(regex=r'^\+?1?\d{9,15}$', message="Phone number must be entered in the format: '+999999999'. Up to 15 digits allowed.")

# Create your models here.
class UserInfo(models.Model):
    user = models.OneToOneField(User)
    dob = models.DateField()
    address1 = models.CharField(max_length=100)
    address2 = models.CharField(max_length=100, blank=True)
    city = models.CharField(max_length=32)
    province = models.CharField(max_length=32)
    postal_code_regex = RegexValidator(regex=r'^[a-zA-Z][0-9][a-zA-Z] [0-9][a-zA-Z][0-9]$', message="Phone number must be entered in the format: 'A1B 2C3'.")
    postal_code = models.CharField(validators=[postal_code_regex], max_length=7)
    phone_number = models.CharField(validators=[phone_regex], max_length=16)

    def __str__(self):
           return 'UserInfo: ' + self.user.username

class Client(models.Model):
    user = models.OneToOneField(User)
    business_number = models.CharField(max_length=16)
    alt_name = models.CharField(max_length=32)
    alt_address1 = models.CharField(max_length=100)
    alt_address2 = models.CharField(max_length=100, blank=True)
    alt_city = models.CharField(max_length=32)
    alt_province = models.CharField(max_length=32)
    alt_phone_number = models.CharField(validators=[phone_regex], max_length=16)

    def __str__(self):
           return self.user.first_name + ' ' + self.user.last_name

class Provider(models.Model):
    user = models.OneToOneField(User)
    sin = models.CharField(max_length=16)
    cert_title1 = models.CharField(max_length=32, blank=True)
    cert_date1 = models.DateField(blank=True)
    cert_institution1 = models.CharField(max_length=32, blank=True)
    cert_title2 = models.CharField(max_length=32, blank=True)
    cert_date2 = models.DateField(blank=True)
    cert_institution2 = models.CharField(max_length=32, blank=True)
    cert_title3 = models.CharField(max_length=32, blank=True)
    cert_date3 = models.DateField(blank=True)
    cert_institution3 = models.CharField(max_length=32, blank=True)
    emerg_contact_name = models.CharField(max_length=32)
    emerg_contact_number = models.CharField(validators=[phone_regex], max_length=16)
    crim_record_check_date = models.DateField(blank=True)

    def __str__(self):
           return self.user.first_name + ' ' + self.user.last_name

class WorkType(models.Model):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
    client = models.ForeignKey(Client, related_name='work_types')
    color = models.CharField(max_length=16)
    label = models.CharField(max_length=100)
    deleted = models.BooleanField(default=False)

    def __str__(self):
           return 'WorkType: ' + self.label + ' of ' + self.client.user.username

class Manage(models.Model):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
    client = models.ForeignKey(Client, related_name='employees')
    provider = models.ForeignKey(Provider, related_name='employers')
    note = models.CharField(max_length=500, blank=True)
    relation = models.CharField(max_length=32, blank=True)
    approved = models.NullBooleanField(blank=True)
    deleted = models.BooleanField(default=False)

    def __str__(self):
           return self.client.user.first_name + ' manages ' + self.provider.user.first_name

class Price(models.Model):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
    management = models.ForeignKey(Manage, related_name='prices')
    work_type = models.ForeignKey(WorkType, on_delete=models.CASCADE)
    amount = models.DecimalField(max_digits=8, decimal_places=2)
    deleted = models.BooleanField(default=False)

class Shift(models.Model):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
    price = models.ForeignKey(Price)
    set_price = models.DecimalField(max_digits=8, decimal_places=2, null=True)
    set_start = models.DateTimeField(null=True)
    set_end = models.DateTimeField(null=True)
    actual_start = models.DateTimeField(null=True)
    actual_end = models.DateTimeField(null=True)
    approved_start = models.DateTimeField(null=True)
    approved_end = models.DateTimeField(null=True)
    approved_date = models.DateField(null=True)
    description = models.CharField(max_length=100, null=True)
    chart = models.TextField(max_length=1000, null=True)
    provider_approved = models.NullBooleanField(blank=True)
    deleted = models.BooleanField(default=False)