package com.tourguide.modules.order.service;

import com.tourguide.common.exception.BusinessException;
import com.tourguide.modules.order.domain.OrderStatus;
import com.tourguide.modules.order.dto.GuideOrderResponse;
import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.order.mapper.TourOrderMapper;
import com.tourguide.modules.user.entity.GuideReceivingSession;
import com.tourguide.modules.user.mapper.GuideRealtimeStatusMapper;
import com.tourguide.modules.user.mapper.GuideReceivingSessionMapper;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

class GuideTourOrderServiceTest {
    private TourOrderMapper orderMapper;
    private GuideReceivingSessionMapper sessionMapper;
    private GuideRealtimeStatusMapper realtimeStatusMapper;
    private GuideTourOrderService service;

    @BeforeEach
    void setUp() {
        orderMapper = mock(TourOrderMapper.class);
        sessionMapper = mock(GuideReceivingSessionMapper.class);
        realtimeStatusMapper = mock(GuideRealtimeStatusMapper.class);
        service = new GuideTourOrderService(orderMapper, sessionMapper, realtimeStatusMapper);
    }

    @Test
    void shouldStartAllOrdersInReceivingSession() {
        TourOrder order = order(OrderStatus.PENDING_MEETING);
        GuideReceivingSession session = session("ASSIGNED");
        when(orderMapper.selectOne(any())).thenReturn(order);
        when(sessionMapper.selectForUpdate(20L, 8L)).thenReturn(session);
        when(sessionMapper.startSession(20L, 8L)).thenReturn(1);
        when(orderMapper.startSessionOrders(eq(20L), any())).thenReturn(2);

        GuideOrderResponse response = service.start(8L, 10L);

        assertThat(response.getStatus()).isEqualTo("serving");
        assertThat(response.getLectureStartTime()).isNotNull();
        assertThat(order.getArrivedAt()).isNotNull();
        verify(realtimeStatusMapper).disableReceiving(8L);
    }

    @Test
    void shouldTreatRepeatedStartAsSuccess() {
        TourOrder order = order(OrderStatus.IN_SERVICE);
        when(orderMapper.selectOne(any())).thenReturn(order);

        GuideOrderResponse response = service.start(8L, 10L);

        assertThat(response.getStatus()).isEqualTo("serving");
        verify(sessionMapper, never()).selectForUpdate(any(), any());
    }

    @Test
    void shouldRejectOrderOutsidePendingMeetingState() {
        TourOrder order = order(OrderStatus.COMPLETED);
        when(orderMapper.selectOne(any())).thenReturn(order);

        assertThatThrownBy(() -> service.start(8L, 10L))
                .isInstanceOf(BusinessException.class)
                .hasMessage("当前订单不能开始讲解");
    }

    private TourOrder order(OrderStatus status) {
        TourOrder order = new TourOrder();
        order.setId(10L);
        order.setGuideId(8L);
        order.setReceivingSessionId(20L);
        order.setStatus(status.getCode());
        order.setPeopleCount(2);
        return order;
    }

    private GuideReceivingSession session(String status) {
        GuideReceivingSession session = new GuideReceivingSession();
        session.setId(20L);
        session.setGuideId(8L);
        session.setStatus(status);
        return session;
    }
}