"""
Unit tests for cell_name and domain length validation in update_config().
"""

import sys
import os
import json

# Ensure api/ is on the path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'api'))

import pytest
from app import app


@pytest.fixture
def client():
    app.config['TESTING'] = True
    with app.test_client() as c:
        yield c


def put_config(client, payload):
    return client.put(
        '/api/config',
        data=json.dumps(payload),
        content_type='application/json',
    )


# ---------------------------------------------------------------------------
# cell_name validation
# ---------------------------------------------------------------------------

def test_cell_name_too_long_returns_400(client):
    """cell_name > 255 characters must be rejected with 400."""
    resp = put_config(client, {'cell_name': 'a' * 256})
    assert resp.status_code == 400
    body = json.loads(resp.data)
    assert 'cell_name' in body['error']
    assert '255' in body['error']


def test_cell_name_exactly_255_returns_200(client):
    """cell_name of exactly 255 characters must be accepted."""
    resp = put_config(client, {'cell_name': 'a' * 255})
    assert resp.status_code == 200


def test_cell_name_empty_string_returns_400(client):
    """Empty cell_name must be rejected with 400."""
    resp = put_config(client, {'cell_name': ''})
    assert resp.status_code == 400
    body = json.loads(resp.data)
    assert 'cell_name' in body['error']


def test_cell_name_valid_returns_200(client):
    """A short, valid cell_name must be accepted."""
    resp = put_config(client, {'cell_name': 'mycell'})
    assert resp.status_code == 200


# ---------------------------------------------------------------------------
# domain validation
# ---------------------------------------------------------------------------

def test_domain_too_long_returns_400(client):
    """domain > 255 characters must be rejected with 400."""
    resp = put_config(client, {'domain': 'b' * 256})
    assert resp.status_code == 400
    body = json.loads(resp.data)
    assert 'domain' in body['error']
    assert '255' in body['error']


def test_domain_exactly_255_returns_200(client):
    """domain of exactly 255 characters must be accepted."""
    resp = put_config(client, {'domain': 'b' * 255})
    assert resp.status_code == 200


def test_domain_empty_string_returns_400(client):
    """Empty domain must be rejected with 400."""
    resp = put_config(client, {'domain': ''})
    assert resp.status_code == 400
    body = json.loads(resp.data)
    assert 'domain' in body['error']


def test_domain_valid_returns_200(client):
    """A short, valid domain must be accepted."""
    resp = put_config(client, {'domain': 'cell.local'})
    assert resp.status_code == 200