import logging

from django.db import models
from wagtail.admin.edit_handlers import (
    FieldPanel,
    TabbedInterface,
    ObjectList,
    StreamFieldPanel,
)
from wagtail.core.blocks import StreamBlock
from wagtail.core.fields import StreamField
from wagtail.images.blocks import ImageChooserBlock

from books.managers import ContentBlockManager
from core.wagtail_utils import get_default_settings
from books.blocks import (
    CMSDocumentBlock,
    SolutionBlock,
    TextBlock,
    BasicKnowledgeBlock,
    LinkBlock,
    VideoBlock,
    DocumentBlock,
    ImageUrlBlock,
    AssignmentBlock,
    InfogramBlock,
    GeniallyBlock,
    SubtitleBlock,
    SurveyBlock,
    ModuleRoomSlugBlock,
    ThinglinkBlock,
    InstructionBlock,
)
from books.utils import get_type_and_value
from core.wagtail_utils import StrictHierarchyPage
from notes.models import ContentBlockBookmark
from surveys.models import Survey
from users.models import SchoolClass, User

logger = logging.getLogger(__name__)


class ContentBlock(StrictHierarchyPage):
    class Meta:
        verbose_name = "Inhaltsblock"
        verbose_name_plural = "Inhaltsblöcke"

    NORMAL = "normal"
    TASK = "task"
    INSTRUMENT = "instrument"

    TYPE_CHOICES = (
        (NORMAL, "Normal"),
        (TASK, "Auftrag"),
        (INSTRUMENT, "Instrument"),
    )

    # blocks without owner are visible by default, need to be hidden for each class
    hidden_for = models.ManyToManyField(
        SchoolClass, related_name="hidden_content_blocks"
    )
    # blocks with owner are hidden by default, need to be shown for each class
    visible_for = models.ManyToManyField(
        SchoolClass, related_name="visible_content_blocks"
    )
    user_created = models.BooleanField(default=False)
    original_creator = models.ForeignKey(
        User, null=True, blank=True, default=None, on_delete=models.SET_NULL
    )

    bookmarks = models.ManyToManyField(
        User, through=ContentBlockBookmark, related_name="bookmarked_content_blocks"
    )

    content_blocks = [
        ("text_block", TextBlock()),
        ("basic_knowledge", BasicKnowledgeBlock()),
        ("assignment", AssignmentBlock()),
        ("survey", SurveyBlock()),
        ("image_block", ImageChooserBlock()),
        ("image_url_block", ImageUrlBlock()),
        ("link_block", LinkBlock()),
        # ('solution', TextBlock(icon='tick')),
        ("solution", SolutionBlock()),
        ("video_block", VideoBlock()),
        ("document_block", DocumentBlock()),
        ("infogram_block", InfogramBlock()),
        ("genially_block", GeniallyBlock()),
        ("thinglink_block", ThinglinkBlock()),
        ("subtitle", SubtitleBlock()),
        ("instruction", InstructionBlock()),
        ("module_room_slug", ModuleRoomSlugBlock()),
        # ('cms_document_block', DocumentChooserBlock(label='CMS Document'))
        ("cms_document_block", CMSDocumentBlock()),
    ]

    content_list_item = StreamBlock(content_blocks)
    contents = StreamField(
        content_blocks + [("content_list_item", content_list_item)],
        null=True,
        blank=True,
    )

    type = models.CharField(
        max_length=100, choices=TYPE_CHOICES, default=NORMAL)

    content_panels = [
        FieldPanel("title", classname="full title"),
        FieldPanel("type"),
        StreamFieldPanel("contents"),
    ]

    #
    edit_handler = TabbedInterface(
        [ObjectList(content_panels, heading="Content"), get_default_settings()]
    )

    parent_page_types = ["books.Chapter"]
    subpage_types = []
    # prevent these fields from being copied
    exclude_fields_in_copy = ["bookmarks"]

    objects = ContentBlockManager()

    @property
    def module(self):
        return self.get_parent().get_parent().specific

    def is_hidden_for_class(self, school_class):
        return (
            not self.user_created
            and self.hidden_for.filter(id=school_class.id).exists()
        ) or (
            self.user_created
            and not self.visible_for.filter(id=school_class.id).exists()
        )

    def save(self, *args, **kwargs):
        for data in self.contents.raw_data:
            block_type, value = get_type_and_value(data)

            if block_type == "survey":
                module = self.module
                survey = value["survey_id"]
                if isinstance(survey, int):
                    survey = Survey.objects.get(pk=survey)
                if survey.module != module:
                    survey.module = module
                    survey.save()
        super().save(*args, **kwargs)


class ContentBlockSnapshot(ContentBlock):
    hidden = models.BooleanField(default=False)
    snapshot = models.ForeignKey(
        "books.snapshot",
        on_delete=models.SET_NULL,
        null=True,
        related_name="custom_content_blocks",
    )

    def to_regular_content_block(self, owner, school_class):
        cb = ContentBlock(
            contents=self.contents,
            type=self.type,
            title=self.title,
            owner=owner,
            original_creator=self.original_creator,
            user_created=True,
        )
        self.add_sibling(instance=cb, pos="right")
        # some wagtail magic
        revision = cb.save_revision()
        revision.publish()
        cb.visible_for.add(school_class)
        cb.save()

        return cb