"""Flask test client / real-DB integration tests for the manage-booking page
(#18), per #14's testing decision: assert on HTTP response + resulting DB
state.
"""
from datetime import date, time, timedelta

import pytest

import booking_db as bdb
from app import app as flask_app
from booking_api import _mint_manage_token

CLIENT_A = "C-TEST-MANAGE-A"


@pytest.fixture
def client():
    flask_app.config["TESTING"] = True
    return flask_app.test_client()


def _next_monday(after):
    d = after + timedelta(days=1)
    while d.weekday() != 0:
        d += timedelta(days=1)
    return d


def _setup_resource_and_service(client_id=CLIENT_A):
    with bdb.db.connect() as conn, conn.cursor() as cur:
        cur.execute(
            "INSERT INTO clients (client_id, timezone, auto_confirm) VALUES (%s, %s, %s) "
            "ON CONFLICT (client_id) DO UPDATE SET timezone = EXCLUDED.timezone, "
            "auto_confirm = EXCLUDED.auto_confirm",
            (client_id, "Europe/Berlin", True))
        conn.commit()
    resource = bdb.create_resource(client_id, "Chair 1", min_notice_minutes=0,
                                    max_advance_days=365)
    bdb.set_resource_hours(client_id, resource["resource_id"], 0, time(9, 0), time(17, 0))
    service = bdb.create_service(client_id, "Haircut", 60, price=25)
    return resource, service


def _create_booking(client, resource, service, slot):
    return client.post("/api/booking", json={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "service_id": service["service_id"], "start_time": slot,
        "customer_name": "Dana", "customer_contact": "dana@example.com"}).get_json()


def test_manage_page_shows_invalid_message_for_garbage_token(client):
    resp = client.get("/manage/not-a-real-token")
    assert resp.status_code == 400
    body = resp.get_data(as_text=True)
    assert "ungültig" in body.lower() or "abgelaufen" in body.lower()


def test_manage_page_shows_invalid_message_for_unknown_booking(client):
    token = _mint_manage_token(CLIENT_A, "BK-does-not-exist")
    resp = client.get(f"/manage/{token}")
    assert resp.status_code == 404


def test_manage_page_shows_used_message_for_cancelled_booking(client):
    resource, service = _setup_resource_and_service()
    day = _next_monday(date.today())
    slot = client.get("/api/booking/slots", query_string={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "service_id": service["service_id"],
        "date_from": day.isoformat(), "date_to": day.isoformat()}).get_json()["slots"][0]
    created = _create_booking(client, resource, service, slot)
    client.post("/api/booking/cancel", json={"token": created["token"]})

    resp = client.get(f"/manage/{created['token']}")
    assert resp.status_code == 200
    body = resp.get_data(as_text=True)
    assert "storniert" in body.lower()


def test_manage_page_renders_active_booking_with_manage_ui(client):
    resource, service = _setup_resource_and_service()
    day = _next_monday(date.today())
    slot = client.get("/api/booking/slots", query_string={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "service_id": service["service_id"],
        "date_from": day.isoformat(), "date_to": day.isoformat()}).get_json()["slots"][0]
    created = _create_booking(client, resource, service, slot)

    resp = client.get(f"/manage/{created['token']}")
    assert resp.status_code == 200
    body = resp.get_data(as_text=True)
    assert "Haircut" in body
    assert resource["resource_id"] in body
    assert created["token"] in body


def test_manage_page_cancel_flow_reaches_cancel_api(client):
    resource, service = _setup_resource_and_service()
    day = _next_monday(date.today())
    slot = client.get("/api/booking/slots", query_string={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "service_id": service["service_id"],
        "date_from": day.isoformat(), "date_to": day.isoformat()}).get_json()["slots"][0]
    created = _create_booking(client, resource, service, slot)

    resp = client.post("/api/booking/cancel", json={"token": created["token"]})
    assert resp.status_code == 200
    assert bdb.get_booking(CLIENT_A, created["booking_id"])["status"] == "cancelled"

    followup = client.get(f"/manage/{created['token']}")
    assert "storniert" in followup.get_data(as_text=True).lower()


def test_manage_page_reschedule_slots_browsable_by_duration(client):
    """The manage page's reschedule picker uses duration_minutes (not
    service_id, which bookings don't store) against /api/booking/slots."""
    resource, service = _setup_resource_and_service()
    day = _next_monday(date.today())
    slot = client.get("/api/booking/slots", query_string={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "service_id": service["service_id"],
        "date_from": day.isoformat(), "date_to": day.isoformat()}).get_json()["slots"][0]
    created = _create_booking(client, resource, service, slot)

    resp = client.get("/api/booking/slots", query_string={
        "client_id": CLIENT_A, "resource_id": resource["resource_id"],
        "duration_minutes": "60", "exclude_booking_id": created["booking_id"],
        "date_from": day.isoformat(), "date_to": day.isoformat()})
    assert resp.status_code == 200
    slots = resp.get_json()["slots"]
    # The booking's own slot is excluded from the busy check, so it's
    # available again for a same-slot reschedule (a no-op success).
    assert slot in slots

    reschedule_resp = client.post("/api/booking/reschedule", json={
        "token": created["token"], "start_time": slots[1]})
    assert reschedule_resp.status_code == 200