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import httpx
import urlman
from django.db import models

from core.ld import canonicalise
from stator.models import State, StateField, StateGraph, StatorModel
from users.models import SystemActor


class ReportStates(StateGraph):
    new = State(try_interval=600)
    sent = State()

    new.transitions_to(sent)

    @classmethod
    async def handle_new(cls, instance: "Report"):
        """
        Sends the report to the remote server if we need to
        """
        report = await instance.afetch_full()
        if report.forward and not report.subject_identity.domain.local:
            system_actor = SystemActor()
            try:
                await system_actor.signed_request(
                    method="post",
                    uri=report.subject_identity.inbox_uri,
                    body=canonicalise(report.to_ap()),
                )
            except httpx.RequestError:
                return
        return cls.sent


class Report(StatorModel):
    """
    A complaint about a user or post.
    """

    class Types(models.TextChoices):
        spam = "spam"
        hateful = "hateful"
        illegal = "illegal"
        remote = "remote"
        other = "other"

    state = StateField(ReportStates)

    subject_identity = models.ForeignKey(
        "users.Identity",
        on_delete=models.CASCADE,
        blank=True,
        null=True,
        related_name="reports",
    )
    subject_post = models.ForeignKey(
        "activities.Post",
        on_delete=models.SET_NULL,
        blank=True,
        null=True,
        related_name="reports",
    )

    source_identity = models.ForeignKey(
        "users.Identity",
        on_delete=models.CASCADE,
        blank=True,
        null=True,
        related_name="filed_reports",
    )
    source_domain = models.ForeignKey(
        "users.Domain",
        on_delete=models.CASCADE,
        blank=True,
        null=True,
        related_name="filed_reports",
    )

    moderator = models.ForeignKey(
        "users.Identity",
        on_delete=models.SET_NULL,
        blank=True,
        null=True,
        related_name="moderated_reports",
    )

    type = models.CharField(max_length=100, choices=Types.choices)
    complaint = models.TextField()
    forward = models.BooleanField(default=False)
    valid = models.BooleanField(null=True)

    seen = models.DateTimeField(blank=True, null=True)
    resolved = models.DateTimeField(blank=True, null=True)
    notes = models.TextField(blank=True, null=True)

    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class urls(urlman.Urls):
        admin = "/admin/reports/"
        admin_view = "{admin}{self.pk}/"

    ### ActivityPub ###

    async def afetch_full(self) -> "Report":
        return await Report.objects.select_related(
            "source_identity",
            "source_domain",
            "subject_identity__domain",
            "subject_identity",
            "subject_post",
        ).aget(pk=self.pk)

    def to_ap(self):
        system_actor = SystemActor()
        if self.subject_post:
            objects = [
                self.subject_post.object_uri,
                self.subject_identity.actor_uri,
            ]
        else:
            objects = self.subject_identity.actor_uri
        return {
            "id": f"https://{self.source_domain.uri_domain}/reports/{self.id}/",
            "type": "Flag",
            "actor": system_actor.actor_uri,
            "object": objects,
            "content": self.complaint,
        }