from django.db import models
from django.core.urlresolvers import reverse
from django.utils import timezone

CATS = (
    ('1', "Travco"),
    ('2', "Groceries"),
    ('3', "Lodging"),
    ('4', "Camping"),
    ('5', "Restaurants"),
    ('6', "Petrol"),
    ('7', "Misc"),
)


class Trip(models.Model):
    name = models.CharField(max_length=200)
    slug = models.SlugField()
    start = models.DateTimeField(default=timezone.now, blank=True, null=True)
    end = models.DateTimeField(default=timezone.now, blank=True, null=True)
    dek = models.TextField(null=True, blank=True)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse("expenses:list_expense", kwargs={"slug": self.slug})


class Expense(models.Model):
    name = models.CharField(max_length=200)
    amount = models.DecimalField(max_digits=8, decimal_places=2)
    date = models.DateTimeField(default=timezone.now)
    notes = models.TextField(null=True, blank=True)
    category = models.CharField(max_length=2, choices=CATS, default=1)
    trip = models.ForeignKey(Trip, null=True)

    class Meta:
        ordering = ('-date',)

    def __str__(self):
        return self.name

    def date_month(self):
        return self.date.strftime("%b %Y")