"""Flask test client / real-DB integration tests for the owner agenda,
manual booking, and owner-initiated cancel/reschedule (#20), per #14's
testing decision: assert on HTTP response + resulting DB state.
"""
from datetime import date, datetime, time, timedelta, timezone

import pytest

import booking_db as bdb
from app import app as flask_app

CLIENT_A = "C-TEST-OWNER-BOOKING-A"
CLIENT_B = "C-TEST-OWNER-BOOKING-B"


@pytest.fixture
def client():
    flask_app.config["TESTING"] = True
    flask_app.secret_key = "test-secret"
    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(client_id=CLIENT_A, **resource_kwargs):
    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", **resource_kwargs)
    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


# ---- agenda view ----

def test_agenda_requires_login(client):
    resp = client.get("/owner/agenda")
    assert resp.status_code == 302
    assert "/owner/login" in resp.headers["Location"]


def test_agenda_shows_only_own_clients_bookings(client):
    resource_a, service_a = _setup(CLIENT_A, min_notice_minutes=0, max_advance_days=365)
    resource_b, service_b = _setup(CLIENT_B, min_notice_minutes=0, max_advance_days=365)
    day = _next_monday(date.today())
    start = datetime.combine(day, time(10, 0), tzinfo=timezone(timedelta(hours=2)))
    bdb.create_booking(CLIENT_A, resource_a["resource_id"], "Alice", "a@example.com",
                        "Haircut", start, start + timedelta(hours=1), source="public")
    bdb.create_booking(CLIENT_B, resource_b["resource_id"], "Bob", "b@example.com",
                        "Haircut", start, start + timedelta(hours=1), source="public")

    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    resp = client.get("/owner/agenda", query_string={"week": day.isoformat()})
    assert resp.status_code == 200
    body = resp.get_data(as_text=True)
    assert "Alice" in body
    assert "Bob" not in body


# ---- manual booking ----

def test_owner_can_create_booking_outside_opening_hours(client):
    resource, service = _setup(CLIENT_A)
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    day = _next_monday(date.today())
    # 20:00 local is outside the 09:00-17:00 hours configured by _setup.
    outside_local = datetime.combine(day, time(20, 0)).strftime("%Y-%m-%dT%H:%M")
    resp = client.post("/owner/bookings", data={
        "resource_id": resource["resource_id"], "service_id": service["service_id"],
        "start_time": outside_local, "customer_name": "Walk-in", "customer_contact": "n/a",
        "week": day.isoformat()})
    assert resp.status_code == 302
    assert "error" not in resp.headers["Location"]

    bookings = bdb.list_bookings(CLIENT_A)
    assert len(bookings) == 1
    assert bookings[0]["customer_name"] == "Walk-in"
    assert bookings[0]["source"] == "owner"


def test_owner_cannot_double_book_the_same_resource(client):
    resource, service = _setup(CLIENT_A)
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    day = _next_monday(date.today())
    local_time = datetime.combine(day, time(10, 0)).strftime("%Y-%m-%dT%H:%M")
    first = client.post("/owner/bookings", data={
        "resource_id": resource["resource_id"], "service_id": service["service_id"],
        "start_time": local_time, "customer_name": "First", "customer_contact": "n/a",
        "week": day.isoformat()})
    assert "error" not in first.headers["Location"]

    second = client.post("/owner/bookings", data={
        "resource_id": resource["resource_id"], "service_id": service["service_id"],
        "start_time": local_time, "customer_name": "Second", "customer_contact": "n/a",
        "week": day.isoformat()})
    assert "error=slot_taken" in second.headers["Location"]

    bookings = bdb.list_bookings(CLIENT_A)
    assert len(bookings) == 1


def test_owner_cannot_create_booking_for_another_tenants_resource(client):
    resource_b, service_b = _setup(CLIENT_B)
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    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 NOTHING", (CLIENT_A, "Europe/Berlin", True))
        conn.commit()
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    day = _next_monday(date.today())
    local_time = datetime.combine(day, time(10, 0)).strftime("%Y-%m-%dT%H:%M")
    resp = client.post("/owner/bookings", data={
        "resource_id": resource_b["resource_id"], "service_id": service_b["service_id"],
        "start_time": local_time, "customer_name": "Sneaky", "customer_contact": "n/a",
        "week": day.isoformat()})
    assert "error=not_found" in resp.headers["Location"]
    assert bdb.list_bookings(CLIENT_A) == []


# ---- owner cancel/reschedule ----

def test_owner_can_cancel_own_booking(client):
    resource, service = _setup(CLIENT_A)
    booking = bdb.create_booking(
        CLIENT_A, resource["resource_id"], "Dana", "d@example.com", "Haircut",
        datetime.now(timezone.utc) + timedelta(days=2),
        datetime.now(timezone.utc) + timedelta(days=2, hours=1))
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    resp = client.post(f"/owner/bookings/{booking['booking_id']}/cancel", data={"week": ""})
    assert resp.status_code == 302
    assert "error" not in resp.headers["Location"]
    assert bdb.get_booking(CLIENT_A, booking["booking_id"])["status"] == "cancelled"


def test_owner_cannot_cancel_another_tenants_booking(client):
    resource_b, service_b = _setup(CLIENT_B)
    booking = bdb.create_booking(
        CLIENT_B, resource_b["resource_id"], "Eve", "e@example.com", "Haircut",
        datetime.now(timezone.utc) + timedelta(days=2),
        datetime.now(timezone.utc) + timedelta(days=2, hours=1))
    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 NOTHING", (CLIENT_A, "Europe/Berlin", True))
        conn.commit()
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    resp = client.post(f"/owner/bookings/{booking['booking_id']}/cancel", data={"week": ""})
    assert "error=not_found" in resp.headers["Location"]
    assert bdb.get_booking(CLIENT_B, booking["booking_id"])["status"] != "cancelled"


def test_owner_can_reschedule_own_booking(client):
    resource, service = _setup(CLIENT_A, min_notice_minutes=0, max_advance_days=365)
    day = _next_monday(date.today())
    start = datetime.combine(day, time(9, 0), tzinfo=timezone(timedelta(hours=2)))
    booking = bdb.create_booking(
        CLIENT_A, resource["resource_id"], "Fay", "f@example.com", "Haircut",
        start, start + timedelta(hours=1))
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    new_local = datetime.combine(day, time(11, 0)).strftime("%Y-%m-%dT%H:%M")
    resp = client.post(f"/owner/bookings/{booking['booking_id']}/reschedule",
                        data={"start_time": new_local, "week": day.isoformat()})
    assert resp.status_code == 302
    assert "error" not in resp.headers["Location"]
    updated = bdb.get_booking(CLIENT_A, booking["booking_id"])
    assert updated["start_time"].hour in (9, 10)  # 11:00 Europe/Berlin -> 09:00/10:00 UTC


def test_owner_reschedule_into_occupied_slot_fails(client):
    resource, service = _setup(CLIENT_A, min_notice_minutes=0, max_advance_days=365)
    day = _next_monday(date.today())
    slot_1 = datetime.combine(day, time(9, 0), tzinfo=timezone(timedelta(hours=2)))
    slot_2 = datetime.combine(day, time(10, 0), tzinfo=timezone(timedelta(hours=2)))
    bdb.create_booking(CLIENT_A, resource["resource_id"], "Gus", "g@example.com",
                        "Haircut", slot_1, slot_1 + timedelta(hours=1))
    movable = bdb.create_booking(CLIENT_A, resource["resource_id"], "Hana", "h@example.com",
                                  "Haircut", slot_2, slot_2 + timedelta(hours=1))
    bdb.create_user(CLIENT_A, "owner@example.com", "correct horse")
    client.post("/owner/login", data={"email": "owner@example.com", "password": "correct horse"})

    new_local = datetime.combine(day, time(9, 0)).strftime("%Y-%m-%dT%H:%M")
    resp = client.post(f"/owner/bookings/{movable['booking_id']}/reschedule",
                        data={"start_time": new_local, "week": day.isoformat()})
    assert "error=unavailable" in resp.headers["Location"]
    assert bdb.get_booking(CLIENT_A, movable["booking_id"])["start_time"] == slot_2