from django.db import models
from django.db.models import DateTimeField, CharField
from wagtail import blocks
from wagtail.admin.panels import FieldPanel
from wagtail.blocks import StreamBlock
from wagtail.fields import StreamField
from wagtail.models import Page

from vbv_lernwelt.files.models import UploadFile


class ExplanationBlock(blocks.CharBlock):
    class Meta:
        icon = "comment"


class PerformanceObjectiveBlock(blocks.CharBlock):
    class Meta:
        icon = "tick"


class UserTextInputBlock(blocks.StaticBlock):
    class Meta:
        icon = "edit"


class UserConfirmationBlock(blocks.CharBlock):
    confirmation_text = blocks.BooleanBlock()

    class Meta:
        icon = "tick-inverse"


class TaskBlock(blocks.StructBlock):
    title = blocks.CharBlock()
    file_submission_required = blocks.BooleanBlock()
    content = StreamBlock(
        [
            ("explanation", ExplanationBlock()),
            ("user_text_input", UserTextInputBlock()),
            ("user_confirmation", UserConfirmationBlock()),
        ],
        use_json_field=True,
    )

    class Meta:
        icon = "tasks"
        label = "Teilauftrag"


class Assignment(Page):
    # TODO: Referenz auf durchfhrung
    starting_position = CharField(max_length=1024)
    due = DateTimeField()  # Zwingend teil der Durchführung
    performance_objectives = StreamField(
        [
            ("performance_objective", PerformanceObjectiveBlock()),
        ],
        use_json_field=True,
    )
    effort_required = CharField(max_length=255)
    assessment_tool = models.OneToOneField(UploadFile, on_delete=models.PROTECT)
    tasks = StreamField(
        [
            ("task", TaskBlock()),
        ],
        use_json_field=True,
    )

    content_panels = Page.content_panels + [
        FieldPanel("starting_position"),
        FieldPanel("due"),
        FieldPanel("performance_objectives"),
        FieldPanel("effort_required"),
        FieldPanel("assessment_tool"),
        FieldPanel("tasks"),
    ]

    class Meta:
        verbose_name = "Auftrag"


class AssignmentPage(Page):
    subpage_types = ["assignment.Assignment"]