"""Per-user browse preferences: validation and merge semantics."""

import json

from django.contrib.auth import get_user_model
from django.test import Client, TestCase

from rest_framework.authtoken.models import Token

User = get_user_model()


class PreferenceTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(
            username="prefs-user", password="prefs-pass-123456"
        )
        self.client = Client()
        self.client.defaults["HTTP_AUTHORIZATION"] = (
            f"Token {Token.objects.create(user=self.user).key}"
        )

    def post(self, payload):
        return self.client.post(
            "/api/auth/preferences/",
            data=json.dumps(payload),
            content_type="application/json",
        )

    def test_e621_per_page_round_trips_within_range(self):
        response = self.post({"e621_per_page": 320})
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json()["e621_per_page"], 320)
        self.assertEqual(
            self.client.get("/api/auth/me/").json()["preferences"]["e621_per_page"],
            320,
        )

    def test_e621_per_page_rejects_out_of_range(self):
        for value in (0, 8, 321, 1000):
            self.assertEqual(self.post({"e621_per_page": value}).status_code, 400, value)

    def test_merge_keeps_other_keys(self):
        self.post({"ratings": ["s"], "e621_per_page": 100})
        response = self.post({"per_page": 24})
        data = response.json()
        self.assertEqual(data["ratings"], ["s"])
        self.assertEqual(data["e621_per_page"], 100)
        self.assertEqual(data["per_page"], 24)