from __future__ import annotations

from datetime import date, time

import pytest
from pydantic import ValidationError

from app.schemas.itinerary import (
    DailyItinerary,
    FlightSelection,
    HotelSelection,
    ItineraryActivity,
    ItineraryPlan,
)


def build_plan() -> ItineraryPlan:
    return ItineraryPlan(
        title="上海至成都四日旅行",
        overview="轻松游览成都代表性景点。",
        selected_flight=FlightSelection(
            flight_type="round_trip",
            combination_id="round-001",
            outbound_option_id="out-001",
            return_option_id="ret-001",
            quoted_price=1800,
            currency="CNY",
            selection_reason="综合价格与时间。",
        ),
        selected_hotel=HotelSelection(
            hotel_id="hotel-001",
            name="测试酒店",
            check_in_date=date(2026, 8, 10),
            check_out_date=date(2026, 8, 13),
            nights=3,
            price_per_night=500,
            estimated_total_price=1500,
            currency="CNY",
            selection_reason="靠近主要景点。",
        ),
        days=[
            DailyItinerary(
                day_index=1,
                date=date(2026, 8, 10),
                theme="抵达成都",
                activities=[
                    ItineraryActivity(
                        sequence=1,
                        activity_type="flight",
                        name="前往成都",
                        start_time=time(9, 0),
                        end_time=time(12, 0),
                    )
                ],
            )
        ],
    )


def test_valid_itinerary_plan() -> None:
    plan = build_plan()

    assert plan.selected_hotel.nights == 3
    assert plan.selected_flight.quoted_price == 1800
    assert len(plan.days) == 1


def test_round_trip_requires_return_option() -> None:
    with pytest.raises(ValidationError):
        FlightSelection(
            flight_type="round_trip",
            combination_id="round-001",
            outbound_option_id="out-001",
            return_option_id=None,
            selection_reason="测试",
        )


def test_duplicate_day_date_is_rejected() -> None:
    plan = build_plan()

    duplicate_day = plan.days[0].model_copy(
        update={
            "day_index": 2,
        }
    )

    with pytest.raises(ValidationError):
        ItineraryPlan(
            title=plan.title,
            overview=plan.overview,
            selected_flight=(
                plan.selected_flight
            ),
            selected_hotel=(
                plan.selected_hotel
            ),
            days=[
                plan.days[0],
                duplicate_day,
            ],
        )