# -*- coding: utf-8 -*-

'''

Created on Jun 8, 2013

@author: ymh

'''

from django.db import models

from django.contrib.auth import get_user_model

from .. import settings 

import datetime

import logging

logger = logging.getLogger(__name__)

User = get_user_model()

TERM_URL_STATUS_CHOICES = (

    (0, "null_result"),

    (1, "redirection"),

    (2, "homonyme"),

    (3, "match"),

    (4, "unsematized"),

)

TERM_URL_STATUS_DICT = {

    "null_result":0,

    "redirection":1,

    "homonyme":2,

    "match":3,

    "unsemantized":4,

}

class Thesaurus(models.Model):

    label = models.CharField(max_length=128, unique=True, blank=False, null=False, db_index=True)

    title = models.CharField(max_length=1024, unique=False, blank=False, null=False, db_index=False)

    description = models.TextField(blank=True, null=True)    

    uri = models.URLField(max_length=2048, blank=True, null=True, db_index=True)

    class Meta:

        app_label = 'core'

        ordering = ['label']

    def __unicode__(self):

        return self.label

class Term(models.Model):

    label = models.CharField(max_length=1024, unique=False, blank=False, null=False, db_index=True)

    lang = models.CharField(max_length=128, unique=False, blank=True, null=True, db_index=True)

    uri = models.URLField(max_length=2048, blank=True, null=True, db_index=True)

    normalized_label = models.CharField(max_length=1024, unique=False, blank=False, null=False, db_index=True, editable=False)

    wp_label = models.CharField(max_length=1024, unique=False, blank=True, null=True, db_index=True)

    wp_alternative_label = models.CharField(max_length=1024, unique=False, blank=True, null=True, db_index=True)

    thesaurus = models.ForeignKey(Thesaurus, blank=False, null=False, db_index=True)

    created_at = models.DateTimeField(auto_now_add=True)

    wikipedia_url = models.URLField(max_length=2048, blank=True, null=True, db_index=True)

    wikipedia_pageid = models.BigIntegerField(unique=False, blank=True, null=True, db_index=True)

    wikipedia_revision_id = models.BigIntegerField(unique=False, blank=True, null=True)

    alternative_wikipedia_url = models.URLField(max_length=2048, blank=True, null=True, db_index=True)

    alternative_wikipedia_pageid = models.BigIntegerField(unique=False, blank=True, null=True, db_index=True)

    url_status = models.IntegerField(choices=TERM_URL_STATUS_CHOICES, blank=True, null=True, default=None, db_index=True)

    dbpedia_uri = models.URLField(max_length=2048, blank=True, null=True, db_index=True)

    validation_date = models.DateTimeField(null=True, blank=True, serialize=False)

    validated = models.BooleanField(default=False, db_index=True)

    validator = models.ForeignKey(User, null=True, blank=True, serialize=False)

    @property

    def alternative_labels_str(self):

        return " | ".join([l.label for l in self.alternative_labels.all()])

    @property

    def wikipedia_revision_permalink(self):

        return settings.WIKIPEDIA_VERSION_PERMALINK_TEMPLATE % (unicode(self.wikipedia_revision_id))

    @property

    def url_status_text(self):

        return TERM_URL_STATUS_CHOICES[self.url_status][1]

    def validate(self, user):

        if not self.validated:

            self.validation_date = datetime.datetime.utcnow()

            self.validated = True

            self.validator = user

            self.save()

    def unvalidate(self):

        if self.validated:

            self.validated = False

            self.validator = None

            self.validation_date = None

            self.save()

    class Meta:

        app_label = 'core'

class TermLabel(models.Model):

    label = models.CharField(max_length=1024, unique=False, blank=False, null=False, db_index=True)

    lang = models.CharField(max_length=128, unique=False, blank=True, null=True, db_index=True)

    term = models.ForeignKey(Term, blank=False, null=False, db_index=True, related_name="alternative_labels")

    class Meta:

        app_label = 'core'