"""
REAL integration tests for notes CRUD over HTTP.

Every test makes actual HTTP requests to a live Django server.
"""

import json

from django.test import LiveServerTestCase
from urllib.request import urlopen, Request


class RealHTTPMixin:
    def _session_init(self):
        url = f"{self.live_server_url}/api/djarea/session/"
        resp = urlopen(Request(url))
        cookies = resp.headers.get_all("Set-Cookie") or []
        for cookie in cookies:
            if "csrftoken=" in cookie:
                self._csrf_token = cookie.split("csrftoken=")[1].split(";")[0]
                self._cookies = f"csrftoken={self._csrf_token}"
                return
        self._csrf_token = None
        self._cookies = ""

    def _call(self, fn: str, args: dict | None = None):
        url = f"{self.live_server_url}/api/djarea/call/"
        body = json.dumps({"fn": fn, "args": args or {}}).encode()
        req = Request(url, data=body, method="POST")
        req.add_header("Content-Type", "application/json")
        if self._csrf_token:
            req.add_header("X-CSRFToken", self._csrf_token)
        if self._cookies:
            req.add_header("Cookie", self._cookies)
        resp = urlopen(req)
        return json.loads(resp.read())


class NotesCRUDTests(RealHTTPMixin, LiveServerTestCase):
    """Full CRUD lifecycle over real HTTP."""

    def setUp(self):
        self._session_init()

    def test_list_notes_empty(self):
        data = self._call("list_notes")

        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["notes"], [])
        self.assertEqual(data["data"]["count"], 0)

    def test_create_note(self):
        data = self._call("create_note", {"title": "First Note", "content": "Hello!"})

        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["title"], "First Note")
        self.assertEqual(data["data"]["content"], "Hello!")
        self.assertFalse(data["data"]["pinned"])
        self.assertIn("id", data["data"])
        self.assertIn("created_at", data["data"])

    def test_create_and_list(self):
        self._call("create_note", {"title": "Note A"})
        self._call("create_note", {"title": "Note B"})

        data = self._call("list_notes")
        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["count"], 2)
        titles = [n["title"] for n in data["data"]["notes"]]
        self.assertIn("Note A", titles)
        self.assertIn("Note B", titles)

    def test_get_note_by_id(self):
        create = self._call("create_note", {"title": "Get Me", "content": "Specific"})
        note_id = create["data"]["id"]

        data = self._call("get_note", {"id": note_id})
        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["id"], note_id)
        self.assertEqual(data["data"]["title"], "Get Me")

    def test_update_note(self):
        create = self._call("create_note", {"title": "Original"})
        note_id = create["data"]["id"]

        data = self._call("update_note", {"id": note_id, "title": "Updated"})
        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["title"], "Updated")

    def test_update_note_pin(self):
        create = self._call("create_note", {"title": "Pin Me"})
        note_id = create["data"]["id"]

        data = self._call("update_note", {"id": note_id, "pinned": True})
        self.assertFalse(data["error"])
        self.assertTrue(data["data"]["pinned"])

    def test_delete_note(self):
        create = self._call("create_note", {"title": "Delete Me"})
        note_id = create["data"]["id"]

        data = self._call("delete_note", {"id": note_id})
        self.assertFalse(data["error"])
        self.assertTrue(data["data"]["deleted"])

        # Verify it's gone
        from urllib.error import HTTPError
        try:
            get_data = self._call("get_note", {"id": note_id})
            self.assertTrue(get_data["error"])
        except HTTPError:
            pass  # 500 is also a valid failure signal

    def test_pinned_notes_sort_first(self):
        self._call("create_note", {"title": "Unpinned"})
        self._call("create_note", {"title": "Pinned", "pinned": True})

        data = self._call("list_notes")
        self.assertFalse(data["error"])
        self.assertEqual(data["data"]["notes"][0]["title"], "Pinned")

    def test_full_lifecycle(self):
        """Create -> update -> pin -> verify -> delete over real HTTP."""
        # Create
        create = self._call("create_note", {"title": "Lifecycle", "content": "v1"})
        note_id = create["data"]["id"]

        # Update
        self._call("update_note", {"id": note_id, "content": "v2"})

        # Pin
        self._call("update_note", {"id": note_id, "pinned": True})

        # Verify
        get = self._call("get_note", {"id": note_id})
        self.assertEqual(get["data"]["title"], "Lifecycle")
        self.assertEqual(get["data"]["content"], "v2")
        self.assertTrue(get["data"]["pinned"])

        # Delete
        delete = self._call("delete_note", {"id": note_id})
        self.assertTrue(delete["data"]["deleted"])