import sqlite3
import importlib

import pytest

server_app_module = importlib.import_module("server.app")

# Expose app and init_db from the imported module
app = server_app_module.app
init_db = server_app_module.init_db


@pytest.fixture
def client():
    with app.test_client() as client:
        yield client


def test_newsletter_subscription_creates_record(client):
    resp = client.post("/api/newsletter", json={"email": "test@example.com"})
    assert resp.status_code == 201
    body = resp.get_json()
    assert body["status"] == "ok"
    # Note: The API doesn't return an ID in the response


def test_newsletter_duplicate_subscription_returns_conflict(client):
    # First subscription
    client.post("/api/newsletter", json={"email": "test@example.com"})
    # Duplicate subscription
    resp = client.post("/api/newsletter", json={"email": "test@example.com"})
    assert resp.status_code == 409
    body = resp.get_json()
    assert body["status"] == "error"
    assert "already subscribed" in body["message"].lower()


def test_newsletter_unsubscribe(client):
    # Subscribe first
    client.post("/api/newsletter", json={"email": "test@example.com"})
    # Unsubscribe
    resp = client.delete("/api/newsletter", json={"email": "test@example.com"})
    assert resp.status_code == 200
    body = resp.get_json()
    assert body["status"] == "ok"
    assert "unsubscribed" in body["message"].lower()


def test_newsletter_unsubscribe_not_subscribed(client):
    resp = client.delete("/api/newsletter", json={"email": "test@example.com"})
    assert resp.status_code == 404
    body = resp.get_json()
    assert body["status"] == "error"
    assert "not subscribed" in body["message"].lower()


def test_newsletter_update_email(client):
    # Subscribe first
    client.post("/api/newsletter", json={"email": "old@example.com"})
    # Update email
    resp = client.put(
        "/api/newsletter", json={"old_email": "old@example.com", "new_email": "new@example.com"})
    assert resp.status_code == 200
    body = resp.get_json()
    assert body["status"] == "ok"
    assert "updated" in body["message"].lower()


def test_newsletter_update_email_not_found(client):
    resp = client.put(
        "/api/newsletter", json={"old_email": "nonexistent@example.com", "new_email": "new@example.com"})
    assert resp.status_code == 404
    body = resp.get_json()
    assert body["status"] == "error"
    assert "not found" in body["message"].lower()


def test_newsletter_manage_page_get(client):
    resp = client.get("/api/newsletter/manage")
    assert resp.status_code == 200
    assert b"Newsletter Subscription Management" in resp.data


def test_newsletter_manage_subscribe(client):
    resp = client.post("/api/newsletter/manage",
                       data={"email": "manage@example.com", "action": "subscribe"})
    assert resp.status_code == 200
    assert b"Successfully subscribed" in resp.data


def test_newsletter_manage_unsubscribe(client):
    # Subscribe first
    client.post("/api/newsletter/manage",
                data={"email": "manage@example.com", "action": "subscribe"})
    # Unsubscribe
    resp = client.post("/api/newsletter/manage",
                       data={"email": "manage@example.com", "action": "unsubscribe"})
    assert resp.status_code == 200
    assert b"Successfully unsubscribed" in resp.data


def test_newsletter_manage_update(client):
    # Subscribe first
    client.post("/api/newsletter/manage",
                data={"email": "old@example.com", "action": "subscribe"})
    # Update
    resp = client.post("/api/newsletter/manage", data={
                       "old_email": "old@example.com", "new_email": "updated@example.com", "action": "update"})
    assert resp.status_code == 200
    # Check that some success message is displayed
    assert b"success" in resp.data.lower() or b"updated" in resp.data.lower()


def test_newsletter_manage_invalid_email(client):
    resp = client.post("/api/newsletter/manage",
                       data={"email": "invalid-email", "action": "subscribe"})
    assert resp.status_code == 200
    assert b"Please enter a valid email address" in resp.data