from mptt.models import TreeForeignKey
from datetime import datetime
from django.db import models
from django.utils import timezone

from users.models import User, Team
from specializations.models import Specialization


CURRENCIES = (
    ('rur', 'RUR'),
    ('usd', 'USD'),
    ('eur', 'EUR'),
)

TERMS = (
    ('project', 'За проект'),
    ('hour', 'За час'),
    ('day', 'За день'),
    ('month', 'За месяц'),
)


class BuildingClassfication(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Тип здания'
        verbose_name_plural = 'Типы зданий'


class ConstructionType(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Вид строительства'
        verbose_name_plural = 'Виды строительства'


class Realty(models.Model):
    building_classification = models.ForeignKey(BuildingClassfication, related_name='realties')
    construction_type = models.ForeignKey(ConstructionType, related_name='realties')
    location = TreeForeignKey('common.Location', related_name='realties', null=True, blank=True)
    name = models.CharField(max_length=255)
    user = models.ForeignKey(User, related_name='realties')

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Объект'
        verbose_name_plural = 'Объекты'


class Project(models.Model):
    WORK_TYPES = (
        (1, 'Проектирование'),
        (2, 'Техническое сопровождение')
    )
    
    DEAL_TYPES = (
        ('secure_deal', 'Безопасная сделка (с резервированием бюджета) '),
        ('direct_payment', 'Прямая оплата Исполнителю на его кошелек/счет'),
    )
    
    STATES = (
        ('active', 'Активный'),
        ('trashed', 'В корзине'),
        ('deleted', 'Удален'),
    )
    
    budget = models.DecimalField(max_digits=10, decimal_places=0)
    budget_by_agreement = models.BooleanField(default=False)
    created = models.DateTimeField(default=timezone.now)
    cro = models.BooleanField(default=False)
    currency = models.CharField(max_length=20, default='rur', choices=CURRENCIES)
    customer = models.ForeignKey(User, related_name='projects')
    deal_type = models.CharField(max_length=20, default='secure_deal', choices=DEAL_TYPES)
    name = models.CharField(max_length=255)
    price_and_term_required = models.BooleanField(default=False)
    realty = models.ForeignKey(Realty, blank=True, null=True, related_name='projects')
    specialization = TreeForeignKey(Specialization, related_name='projects')
    state = models.CharField(default='active', max_length=20, choices=STATES)
    term = models.IntegerField(default=0)
    term_type = models.CharField(max_length=20, choices=TERMS, default='hour')
    text = models.TextField(blank=True)
    work_type = models.IntegerField(default=1, choices=WORK_TYPES)
    
    def __str__(self):
        return self.name
    
    class Meta:
        verbose_name = 'Проект'
        verbose_name_plural = 'Проекты'
    
    def secure_deal(self):
        return self.deal_type == 'secure_deal'


class ProjectFile(models.Model):
    file = models.FileField(upload_to='projects/project_files')
    project = models.ForeignKey(Project, related_name='files', blank=True, null=True)
    
    class Meta:
        verbose_name = 'Файл проекта'
        verbose_name_plural = 'Файлы проектов'
    
    def __str__(self):
        return self.file and self.file.url or self.pk


class Answer(models.Model):
    budget = models.DecimalField(max_digits=10, decimal_places=0)
    contractor = models.ForeignKey(User, related_name='answers')
    created = models.DateTimeField(default=timezone.now)
    currency = models.CharField(max_length=5, choices=CURRENCIES, default='rur')
    project = models.ForeignKey(Project, related_name='answers')
    term = models.IntegerField(default=0)
    term_type = models.CharField(max_length=10, choices=TERMS, default='hour')
    text = models.TextField()

    def __str__(self):
        return self.text

    class Meta:
        verbose_name = 'Ответ к проекту'
        verbose_name_plural = 'Ответы к проектам'
        ordering = ('-created',)


class Order(models.Model):
    contractor = models.ForeignKey(User, null=True, blank=True, related_name='orders')
    created = models.DateTimeField(default=timezone.now)
    project = models.OneToOneField(Project, related_name='order')
    secure = models.BooleanField(default=False)
    status = models.BooleanField(default=False)

    def __str__(self):
        return self.project.name

    class Meta:
        verbose_name = 'Заказ'
        verbose_name_plural = 'Заказы'


class Stage(models.Model):
    cost = models.DecimalField(max_digits=10, decimal_places=0)
    cost_type = models.CharField(max_length=5, choices=CURRENCIES, default='rur')
    name = models.CharField(max_length=255)
    order = models.ForeignKey(Order, related_name='stages')
    result = models.CharField(max_length=255)
    term = models.IntegerField(default=0)
    term_type = models.CharField(max_length=10, choices=TERMS, default='hour')

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Этап'
        verbose_name_plural = 'Этапы'


class Candidate(models.Model):
    answer = models.ForeignKey(Answer, related_name='candidates')
    project = models.ForeignKey(Project, related_name='candidates')
    status = models.BooleanField(default=False)

    def __str__(self):
        return self.answer.user.get_full_name()

    class Meta:
        verbose_name = 'Кандидат'
        verbose_name_plural = 'Кандидаты'


class Portfolio(models.Model):
    budget = models.DecimalField(max_digits=10, decimal_places=0, default=0, null=True, blank=True)
    building_classification = models.ForeignKey(BuildingClassfication, related_name='portfolios', null=True, blank=True)
    construction_type = models.ForeignKey(ConstructionType, related_name='portfolios', null=True, blank=True)
    currency = models.CharField(max_length=20, default='rur', choices=CURRENCIES, null=True, blank=True)
    description = models.TextField()
    location = TreeForeignKey('common.Location', related_name='portfolios', null=True, blank=True)
    name = models.CharField(max_length=255)
    specialization = TreeForeignKey(Specialization, related_name='portfolios', null=True, blank=True)
    team = models.ForeignKey(Team, related_name='portfolios', null=True, blank=True)
    term = models.IntegerField(default=0, null=True, blank=True)
    term_type = models.CharField(max_length=20, choices=TERMS, default='hour', null=True, blank=True)
    user = models.ForeignKey(User, related_name='portfolios', null=True, blank=True)
    worksell = models.BooleanField(default=False)
    
    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Портфолио'
        verbose_name_plural = 'Портфолио'

    def get_cover(self):
        photo = self.photos.first()
        return photo and photo.img.url


class PortfolioPhoto(models.Model):
    img = models.ImageField(upload_to='projects/portfolio')
    portfolio = models.ForeignKey(Portfolio, related_name='photos')
    
    class Meta:
        verbose_name = 'Фото портфолио'
        verbose_name_plural = 'Фото портфолио'
    
    def __str__(self):
        return self.img and self.img.url or str(self.img)