package com.tourguide.modules.order.service;

import com.tourguide.common.exception.BusinessException;
import com.tourguide.modules.order.domain.OrderStatus;
import com.tourguide.modules.order.domain.RefundStatus;
import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.order.mapper.TourOrderMapper;
import com.tourguide.modules.review.mapper.OrderReviewMapper;
import com.tourguide.modules.system.service.GuideNotificationService;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.math.BigDecimal;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

class TourOrderServiceTest {
    private TourOrderMapper orderMapper;
    private TourOrderService orderService;

    @BeforeEach
    void setUp() {
        orderMapper = mock(TourOrderMapper.class);
        orderService = new TourOrderService(orderMapper, mock(OrderReviewMapper.class),
                mock(GuideNotificationService.class));
    }

    @Test
    void shouldRefundRequestedAmount() {
        TourOrder order = refundableOrder();
        when(orderMapper.selectForUpdate(1L)).thenReturn(order);

        orderService.refund(1L, new BigDecimal("100.00"));

        assertThat(order.getRefundAmount()).isEqualByComparingTo("100.00");
        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.REFUNDED.getCode());
        assertThat(order.getStatus()).isEqualTo(OrderStatus.REFUNDED.getCode());
        verify(orderMapper).updateById(order);
    }

    @Test
    void shouldRejectAmountGreaterThanPayment() {
        TourOrder order = refundableOrder();
        when(orderMapper.selectForUpdate(1L)).thenReturn(order);

        assertThatThrownBy(() -> orderService.refund(1L, new BigDecimal("156.01")))
                .isInstanceOf(BusinessException.class)
                .hasMessage("退款金额不能超过当前可退金额");
    }

    private TourOrder refundableOrder() {
        TourOrder order = new TourOrder();
        order.setId(1L);
        order.setOrderNo("123465");
        order.setStatus(OrderStatus.COMPLETED.getCode());
        order.setRefundStatus(RefundStatus.NONE.getCode());
        order.setAmount(new BigDecimal("256.10"));
        order.setPaymentAmount(new BigDecimal("156.00"));
        order.setPaymentMethod("WECHAT");
        return order;
    }
}