import uuid
from django.db import models
from colorfield.fields import ColorField
from ckeditor.fields import RichTextField
from django.db.models.signals import post_delete
from .helpers import file_cleanup
from .helpers import RandomFileName
from django.core.validators import MaxValueValidator, MinValueValidator, RegexValidator


class IntListField(models.CharField):
    description = "An integer list"

    def __init__(self, *args, **kwargs):
        if 'max_length' not in kwargs:
            kwargs['max_length'] = 255
        if 'default' not in kwargs:
            kwargs['default'] = ''
        super().__init__(*args, **kwargs)

    def from_db_value(self, value, expression, connection):
        if value is None:
            return value
        if value.strip() == '':
            return list()
        return list(map(int, map(str.strip, value.split(','))))

    def to_python(self, value):
        if isinstance(value, list):
            return value
        if value is None:
            return value
        for i in '[](){}':
            value = value.replace(i, '')
        if value.strip() == '':
            return list()
        return list(map(int, map(str.strip, value.split(','))))

    def get_prep_value(self, value):
        return ','.join(list(map(str, value)))


# Create your models here.


class Timestampable(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    modified = models.DateTimeField(auto_now=True)
    resource_uuid = models.UUIDField(default=uuid.uuid4, editable=False, primary_key=False)

    class Meta:
        abstract = True


class Remindable(Timestampable):
    reminder_alias = models.CharField(default='', unique=True, max_length=255, validators=[
        RegexValidator(r'^[A-Za-z_][A-Za-z0-9_]*$'),
    ], help_text='All characters must be alphanumerical or underline, except by the first character, which must not be alphanumerical.')
    kind = '???'

    @property
    def reminder_title(self):
        return self.__class__.__name__

    def __str__(self):
        return f'{self.reminder_title} {self.kind} #{self.pk}: {self.reminder_alias}'

    class Meta:
        abstract = True


class LanguageString(Remindable):
    resource_uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True, primary_key=False)
    reminder_title = 'Language'

    class Meta:
        abstract = True
        ordering = ('reminder_alias', )


class LanguagePhrase(LanguageString):
    kind = 'phrase'
    pt = models.CharField(default='', max_length=255)
    en = models.CharField(default='', max_length=255)
    es = models.CharField(default='', max_length=255)


class LanguageText(LanguageString):
    kind = 'text'
    pt = models.TextField(default='')
    en = models.TextField(default='')
    es = models.TextField(default='')


class LanguageRichText(LanguageString):
    kind = 'rich text'
    pt = RichTextField(default='')
    en = RichTextField(default='')
    es = RichTextField(default='')


class LanguageInvariantImage(LanguageString):
    kind = 'invariant image'
    picture = models.ImageField(upload_to=RandomFileName(''))

    @property
    def pt(self): return self.picture

    @property
    def en(self): return self.picture

    @property
    def es(self): return self.picture


post_delete.connect(file_cleanup, sender=LanguageInvariantImage, dispatch_uid="webproj.bff.LanguageInvariantImage.file_cleanup")


class LanguageImage(LanguageString):
    kind = 'image'
    pt_image = models.ForeignKey(LanguageInvariantImage, on_delete=models.PROTECT, related_name='+')
    en_image = models.ForeignKey(LanguageInvariantImage, on_delete=models.PROTECT, related_name='+')
    es_image = models.ForeignKey(LanguageInvariantImage, on_delete=models.PROTECT, related_name='+')

    @property
    def pt(self): return self.pt_image.picture

    @property
    def en(self): return self.en_image.picture

    @property
    def es(self): return self.es_image.picture


class Announcement(Timestampable):
    convention = models.ForeignKey('ConventionSeries', on_delete=models.PROTECT, related_name='announcements')
    title = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    body = models.ForeignKey(LanguageText, on_delete=models.PROTECT, related_name='+')
    link = models.ForeignKey(LanguagePhrase, blank=True, null=True,  on_delete=models.PROTECT, related_name='+')

    def __str__(self):
        return f'Announcement #{self.pk}: {self.title}'


class Color(Remindable):
    color = ColorField(default='#000000')
    opacity = models.IntegerField(default=255, validators=[MinValueValidator(0), MaxValueValidator(255)], help_text="Opacity: 0 is transparent, 255 is opaque.")
    kind = ''


class ActivityCategory(Timestampable):
    name = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    color = models.ForeignKey(Color, on_delete=models.PROTECT, related_name='+')
    ordering = models.IntegerField(default=0, blank=True, null=False)

    def __str__(self):
        return f'Category #{self.pk}: {self.name.en}'

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


class Place(Timestampable):
    name = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    color = models.ForeignKey(Color, on_delete=models.PROTECT, related_name='+')
    ordering = models.IntegerField(default=0, blank=True, null=False)

    def __str__(self):
        return f'Place #{self.pk}: {self.name.en}'

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


class Timezone(Remindable):
    kind = ''
    hour = models.IntegerField(default=-3, validators=[MinValueValidator(-24), MaxValueValidator(24)])
    minute = models.IntegerField(default=0, validators=[MinValueValidator(0), MaxValueValidator(60)])


class RegistrationBenefitDefinition(Timestampable):
    description = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    ordering = models.IntegerField(default=0, blank=True, null=False)

    def __str__(self):
        return f'Registration benefit definition #{self.pk}: {self.description.en}'

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


class RegistrationTierDefinition(Timestampable):
    title = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    ordering = models.IntegerField(default=0, blank=True, null=False)

    def __str__(self):
        return f'Registration tier definition #{self.pk}: {self.title.en}'

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


TRILINGUAL_CHOICES = (
    ('pt', 'Portuguese'),
    ('en', 'English'),
    ('es', 'Spanish')
)


class ConventionRegistrationTier(Timestampable):
    level = models.IntegerField(default=0)
    tier = models.ForeignKey(RegistrationTierDefinition, on_delete=models.PROTECT, related_name='+')
    benefits = models.ManyToManyField(RegistrationBenefitDefinition, blank=True, related_name='+')
    convention = models.ForeignKey('ConventionEdition', on_delete=models.PROTECT, related_name='registration_tiers')
    is_lowest = models.BooleanField(default=False, blank=True, null=False)

    def __str__(self):
        return f'Convention registration tier #{self.pk}: {self.convention.name.en} - {self.tier.title.en} ({self.benefits.count()})'


class ConventionActivity(Timestampable):
    conbook_key = models.CharField(default='', max_length=255)
    conbook_pages = IntListField()
    title = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    subtitle = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, blank=True, null=True, related_name='+')
    description = models.ForeignKey(LanguageText, on_delete=models.PROTECT, related_name='+')
    time_start = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    time_end = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    places = models.ManyToManyField(Place, related_name='on_activities')
    categories = models.ManyToManyField(ActivityCategory, blank=True, related_name='on_activities')
    attendable_by = models.ManyToManyField(ConventionRegistrationTier, related_name='+')
    language = models.CharField(
        max_length=2,
        choices=TRILINGUAL_CHOICES,
        default='pt',
    )
    hidden_from_time_table = models.BooleanField(default=False, blank=True, null=False)
    picture = models.ForeignKey(LanguageInvariantImage, blank=True, null=True, related_name='+', on_delete=models.PROTECT)
    convention = models.ForeignKey('ConventionEdition', related_name='events', on_delete=models.PROTECT)

    class Meta:
        ordering = ('-time_start', '-time_end', 'conbook_key')

    def __str__(self):
        return f'Convention activity #{self.pk}: {self.convention.name.en} - {self.title.en} [{self.conbook_key}] ({self.time_start} - {self.time_end})'


class ConventionSeries(Timestampable):
    name = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    url = models.SlugField(default='', unique=True, max_length=255)
    featured = models.ForeignKey('ConventionEdition', null=True, blank=True, on_delete=models.PROTECT, related_name='+')
    statute = models.ForeignKey(LanguageRichText, on_delete=models.PROTECT, related_name='+')
    timezone = models.ForeignKey(Timezone, on_delete=models.PROTECT, related_name='+')
    default_banner = models.ForeignKey(LanguageImage, default=None, on_delete=models.PROTECT, related_name='+')
    language = models.CharField(
        max_length=2,
        choices=TRILINGUAL_CHOICES,
        default='pt',
    )
    # banners ← foreign_relation
    # social_medias ← foreign_relation

    def __str__(self):
        return f'Convention series #{self.pk}: {self.name.en} (/{self.url})'


class SocialMedia(Remindable):
    ordering = models.IntegerField(default=0)
    convention = models.ForeignKey(ConventionSeries, on_delete=models.PROTECT, related_name='social_medias')
    name = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    url = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    icon = models.CharField(default=None, blank=True, null=True, max_length=255, choices=[
        (None, '-- no icon --'),
        ('ic_telegram', 'Telegram'),
        ('ic_twitter', 'Twitter'),
        ('ic_facebook_official', 'Facebook'),
        ('ic_youtube_play', 'YouTube'),
        ('ic_instagram', 'Instagram'),
        ('ic_web_black_24dp', 'Web browser'),
    ])
    kind = ''
    color = models.ForeignKey(Color, on_delete=models.PROTECT, related_name='+')

    class Meta:
        ordering = ('ordering', 'name__reminder_alias', '-pk', )


class ConventionEdition(Timestampable):
    # id ← inherited
    # events ← foreign_relation
    # registration_tiers ← foreign_relation
    # lowestRegistrationTier ← process
    # places ← process
    # tags ← process
    edition_of = models.ForeignKey(ConventionSeries, on_delete=models.PROTECT, related_name='editions')
    name = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    theme = models.ForeignKey(LanguagePhrase, on_delete=models.PROTECT, related_name='+')
    hashtag_reminder = models.CharField(default='', max_length=255)
    timezone = models.ForeignKey(Timezone, on_delete=models.PROTECT, related_name='+')
    fire_notifications_n_minutes_before = models.PositiveIntegerField(default=15)
    convention_day_start_time = models.TimeField(help_text="fill with the time on the timezone of the event.")
    convention_day_end_time = models.TimeField(help_text="fill with the time on the timezone of the event.")
    rule_621_checker = models.BooleanField(default=False, blank=True, null=False)
    next_edition_date = models.DateField(help_text="fill with the time on the timezone of the event.")
    ceremony_opening_time = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    ceremony_closing_time = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    image_default_event = models.ForeignKey(LanguageImage, default=None, null=True, blank=True, on_delete=models.PROTECT, related_name='+')
    image_favorites = models.ForeignKey(LanguageImage, default=None, null=True, blank=True, on_delete=models.PROTECT, related_name='+')
    split_day_into_n_parts = models.IntegerField(default=24, blank=False, null=False, validators=[MaxValueValidator(1440), MinValueValidator(1)])
    language = models.CharField(
        max_length=2,
        choices=TRILINGUAL_CHOICES,
        default='pt',
    )

    def __str__(self):
        return f'Convention #{self.pk}: {self.name.en}'

    class Meta:
        ordering = ('ceremony_opening_time', '-pk', )


class BannerChange(Remindable):
    convention = models.ForeignKey(ConventionSeries, default=None, blank=False, null=False, on_delete=models.PROTECT, related_name="banners")
    show_up_after = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    hide_after = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    banner = models.ForeignKey(LanguageImage, default=None, on_delete=models.PROTECT, related_name='+')

    reminder_title = 'Banner change'
    kind = ''

    class Meta:
        ordering = ('show_up_after', '-pk', )


class MapImage(Remindable):
    ordering = models.IntegerField(default=0)
    convention = models.ForeignKey(ConventionEdition, default=None, blank=False, null=False, on_delete=models.PROTECT, related_name="maps")
    name = models.ForeignKey(LanguagePhrase, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    image = models.ForeignKey(LanguageImage, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    reminder_title = 'Map'
    kind = 'image'

    class Meta:
        ordering = ('convention__ceremony_opening_time', 'ordering', '-pk', )


class ConventionRegistrationLink(Remindable):
    ordering = models.IntegerField(default=0)
    convention = models.ForeignKey(ConventionEdition, default=None, blank=False, null=False, on_delete=models.PROTECT, related_name="registration_links")
    name = models.ForeignKey(LanguagePhrase, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    url = models.ForeignKey(LanguagePhrase, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    color = models.ForeignKey(Color, on_delete=models.PROTECT, null=True, blank=True, related_name='+')
    appears = models.DateTimeField(help_text="fill with the time on the timezone of the event.")
    vanishes = models.DateTimeField(help_text="fill with the time on the timezone of the event.")

    reminder_title = 'Registration'
    kind = 'link'

    class Meta:
        ordering = ('convention__ceremony_opening_time', 'ordering', '-pk', )


class AdditionalRules(Timestampable):
    convention = models.ForeignKey(ConventionEdition, blank=False, null=False, on_delete=models.PROTECT, related_name='additional_rules')
    name = models.ForeignKey(LanguagePhrase, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    rules = models.ForeignKey(LanguageRichText, blank=False, null=False, on_delete=models.PROTECT, related_name='+')
    ordering = models.IntegerField(default=0, blank=True, null=False)

    def __str__(self):
        return f'Additional rules #{self.pk} @ {self.convention.name.en}: {self.name.en}'

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