from enum import Enum
import json

from django.db import models
from django.contrib.auth.models import User
from django.conf import settings
import requests


class GotifyUser(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
    id = models.PositiveIntegerField(verbose_name="Gotify User ID")


class GotifyMessageType(Enum):
    plain = "text/plain"
    markdown = "text/markdown"


class GotifyMessage():
    type: GotifyMessageType
    message: str
    title: str | None
    priority: int
    url: str | None

    def __init__(self, message: str, title: str | None = None, priority: int = 5, url: str | None = None, type: str = 'text/plain'):
        self.message = message
        self.title = title
        if not 0 <= priority <= 10:
            raise ValueError(f"Priority must be 0 to 10.")
        self.priority = priority
        self.url = url
        self.type = GotifyMessageType(type)

    def as_dict(self) -> dict:
        obj = {
            "message": self.message,
            "priority": self.priority,
            "extras": {
                "client::display": {
                    "contentType": self.type.value
                }
            }
        }

        if self.title:
            obj["title"] = self.title

        if self.url:
            obj["extras"]["client::notification"] = {
                "click": {
                    "url": self.url
                }
            }

        return obj


class GotifyApplication(models.Model):
    user = models.OneToOneField(GotifyUser, on_delete=models.CASCADE, primary_key=True)
    id = models.PositiveIntegerField(verbose_name="Gotify Application ID")
    token = models.CharField(max_length=256, verbose_name="Gotify Application Token")

    def send_message(self, message: GotifyMessage):
        endpoint_url = f"http://{settings.GOTIFY_CONFIG['HOST']}/message"
        headers = {
            "Authorization": f"Bearer {self.token}",
            "Content-Type": "application/json"
        }

        response = requests.post(
            url=endpoint_url,
            headers=headers,
            data=json.dumps(message.as_dict())
        )

        if response is not None:
            response.raise_for_status()