package com.tourguide.modules.finance.service;

import com.tourguide.common.exception.BusinessException;
import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.order.mapper.TourOrderMapper;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.math.BigDecimal;
import java.time.LocalDateTime;

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.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

class GuideBalanceSettlementServiceTest {
    private TourOrderMapper orderMapper;
    private GuideWithdrawableBalanceService balanceService;
    private GuideBalanceSettlementService service;

    @BeforeEach
    void setUp() {
        orderMapper = mock(TourOrderMapper.class);
        balanceService = mock(GuideWithdrawableBalanceService.class);
        service = new GuideBalanceSettlementService(orderMapper, balanceService);
    }

    @Test
    void shouldCreditDueOrderAndMarkSettled() {
        LocalDateTime now = LocalDateTime.of(2026, 8, 17, 12, 0);
        TourOrder order = dueOrder(now.minusMinutes(1));
        when(orderMapper.selectForUpdate(10L)).thenReturn(order);
        when(orderMapper.updateById(order)).thenReturn(1);

        assertThat(service.settle(10L, now)).isTrue();

        verify(balanceService).credit(8L, new BigDecimal("90.00"));
        verify(orderMapper).updateById(order);
        assertThat(order.getSettledAt()).isEqualTo(now);
    }

    @Test
    void shouldNotCreditOrderTwice() {
        LocalDateTime now = LocalDateTime.of(2026, 8, 17, 12, 0);
        TourOrder order = dueOrder(now.minusMinutes(1));
        order.setSettledAt(now.minusSeconds(1));
        when(orderMapper.selectForUpdate(10L)).thenReturn(order);

        assertThat(service.settle(10L, now)).isFalse();

        verify(balanceService, never()).credit(8L, new BigDecimal("90.00"));
        verify(orderMapper, never()).updateById(order);
    }

    @Test
    void shouldCreditTeamBalanceForTeamOrder() {
        LocalDateTime now = LocalDateTime.of(2026, 9, 8, 12, 0);
        TourOrder order = dueOrder(now.minusMinutes(1));
        order.setCommissionTeamId(6L);
        when(orderMapper.selectForUpdate(10L)).thenReturn(order);
        when(orderMapper.updateById(order)).thenReturn(1);

        assertThat(service.settle(10L, now)).isTrue();

        verify(balanceService).creditTeam(6L, new BigDecimal("90.00"));
        verify(balanceService, never()).credit(8L, new BigDecimal("90.00"));
    }

    @Test
    void shouldSettleRemainingEarningForPartialRefund() {
        LocalDateTime now = LocalDateTime.of(2026, 9, 8, 12, 0);
        TourOrder order = dueOrder(now.minusMinutes(1));
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));
        order.setRefundStatus("PARTIAL");
        order.setRefundedAmount(new BigDecimal("50.00"));
        when(orderMapper.selectForUpdate(10L)).thenReturn(order);
        when(orderMapper.updateById(order)).thenReturn(1);

        assertThat(service.settle(10L, now)).isTrue();

        verify(balanceService).credit(8L, new BigDecimal("45.00"));
        assertThat(order.getSettledAt()).isEqualTo(now);
    }

    @Test
    void shouldReverseSettledGuideEarningForRefund() {
        TourOrder order = dueOrder(LocalDateTime.now());
        order.setSettledAt(LocalDateTime.now());
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));
        when(balanceService.debitForRefund(8L, new BigDecimal("90.00"))).thenReturn(true);

        service.reverseRefund(order, BigDecimal.ZERO, new BigDecimal("100.00"));

        verify(balanceService).debitForRefund(8L, new BigDecimal("90.00"));
    }

    @Test
    void shouldReverseOnlyIncrementalAmountForPartialRefund() {
        TourOrder order = dueOrder(LocalDateTime.now());
        order.setSettledAt(LocalDateTime.now());
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));
        when(balanceService.debitForRefund(8L, new BigDecimal("27.00"))).thenReturn(true);

        service.reverseRefund(order, new BigDecimal("20.00"), new BigDecimal("50.00"));

        verify(balanceService).debitForRefund(8L, new BigDecimal("27.00"));
    }

    @Test
    void shouldReverseSettledTeamEarningForRefund() {
        TourOrder order = dueOrder(LocalDateTime.now());
        order.setSettledAt(LocalDateTime.now());
        order.setCommissionTeamId(6L);
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));
        when(balanceService.debitTeamForRefund(6L, new BigDecimal("90.00"))).thenReturn(true);

        service.reverseRefund(order, BigDecimal.ZERO, new BigDecimal("100.00"));

        verify(balanceService).debitTeamForRefund(6L, new BigDecimal("90.00"));
    }

    @Test
    void shouldNotSettleOrderWithRefundInProgress() {
        LocalDateTime now = LocalDateTime.of(2026, 8, 17, 12, 0);
        TourOrder order = dueOrder(now.minusMinutes(1));
        order.setRefundStatus("REFUNDING");
        when(orderMapper.selectForUpdate(10L)).thenReturn(order);

        assertThat(service.settle(10L, now)).isFalse();

        verify(balanceService, never()).credit(8L, new BigDecimal("90.00"));
        verify(orderMapper, never()).updateById(order);
    }

    @Test
    void shouldFailRefundWhenBalanceAdjustmentFails() {
        TourOrder order = dueOrder(LocalDateTime.now());
        order.setSettledAt(LocalDateTime.now());
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));

        assertThatThrownBy(() -> service.reverseRefund(order, BigDecimal.ZERO,
                new BigDecimal("100.00")))
                .isInstanceOf(BusinessException.class)
                .hasMessage("退款后导游收益冲正失败");
    }

    private TourOrder dueOrder(LocalDateTime dueAt) {
        TourOrder order = new TourOrder();
        order.setId(10L);
        order.setGuideId(8L);
        order.setStatus("COMPLETED");
        order.setRefundStatus("NONE");
        order.setGuideEarningAmount(new BigDecimal("90.00"));
        order.setSettlementDueAt(dueAt);
        return order;
    }
}