package com.tourguide.modules.order.service;

import com.alibaba.fastjson.JSONObject;
import com.tourguide.common.huifu.properties.HuiFuProperties;
import com.tourguide.modules.finance.service.GuideBalanceSettlementService;
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.entity.TourOrderRefund;
import com.tourguide.modules.order.mapper.TourOrderMapper;
import com.tourguide.modules.order.mapper.TourOrderRefundMapper;
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.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

class HuifuRefundCallbackServiceTest {
    private TourOrderMapper orderMapper;
    private HuifuRefundCallbackService callbackService;
    private GuideSessionTransitionService sessionTransitionService;
    private GuideBalanceSettlementService balanceSettlementService;

    @BeforeEach
    void setUp() {
        HuiFuProperties properties = new HuiFuProperties();
        properties.setHuifuId("merchant-1");
        orderMapper = mock(TourOrderMapper.class);
        sessionTransitionService = mock(GuideSessionTransitionService.class);
        balanceSettlementService = mock(GuideBalanceSettlementService.class);
        callbackService = new HuifuRefundCallbackService(properties, orderMapper, null,
                balanceSettlementService,
                sessionTransitionService);
    }

    @Test
    void successCallbackShouldCompleteRefundOnce() {
        TourOrder order = refundingOrder();
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);

        boolean first = callbackService.handle(successBody());
        boolean duplicate = callbackService.handle(successBody());

        assertThat(first).isTrue();
        assertThat(duplicate).isFalse();
        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.REFUNDED.getCode());
        assertThat(order.getStatus()).isEqualTo(OrderStatus.REFUNDED.getCode());
        assertThat(order.getRefundTime()).isNotNull();
        verify(orderMapper).updateById(order);
    }

    @Test
    void failedCallbackShouldRecordFailureWithoutCompletingRefund() {
        TourOrder order = refundingOrder();
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);
        JSONObject body = successBody();
        body.put("refund_stat", "F");

        boolean completed = callbackService.handle(body);

        assertThat(completed).isFalse();
        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.REFUND_FAILED.getCode());
        verify(orderMapper).updateById(order);
    }

    @Test
    void duplicateSuccessCallbackShouldNotUpdateAgain() {
        TourOrder order = refundingOrder();
        order.setRefundStatus(RefundStatus.REFUNDED.getCode());
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);

        boolean completed = callbackService.handle(successBody());

        assertThat(completed).isFalse();
        verify(orderMapper, never()).updateById(order);
    }

    @Test
    void nestedSuccessCallbackShouldCompleteOrder() {
        TourOrder order = refundingOrder();
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);
        JSONObject data = successBody();
        JSONObject body = new JSONObject();
        body.put("data", data);

        assertThat(callbackService.handle(body)).isTrue();
        assertThat(order.getStatus()).isEqualTo(OrderStatus.REFUNDED.getCode());
    }

    @Test
    void partialSuccessCallbackShouldKeepRefundingBalance() {
        TourOrder order = refundingOrder();
        order.setRefundAmount(new BigDecimal("20.00"));
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);
        JSONObject body = successBody();
        body.put("ord_amt", "20.00");

        assertThat(callbackService.handle(body)).isTrue();
        assertThat(order.getRefundedAmount()).isEqualByComparingTo("20.00");
        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.PARTIAL.getCode());
        assertThat(order.getStatus()).isEqualTo(OrderStatus.CANCELLED.getCode());
    }

    @Test
    void successCallbackShouldReverseSettledGuideEarning() {
        TourOrder order = refundingOrder();
        order.setGuideId(8L);
        order.setAmount(new BigDecimal("100.00"));
        order.setPaymentAmount(new BigDecimal("100.00"));
        order.setGuideEarningAmount(new BigDecimal("90.00"));
        order.setSettledAt(LocalDateTime.of(2026, 8, 2, 12, 0));
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);

        JSONObject body = successBody();
        body.put("ord_amt", "36.00");

        assertThat(callbackService.handle(body)).isTrue();

        verify(balanceSettlementService).reverseRefund(order, BigDecimal.ZERO,
                new BigDecimal("36.00"));
    }

    @Test
    void pendingMeetingSuccessCallbackShouldRestoreGuideSession() {
        TourOrder order = refundingOrder();
        order.setStatus(OrderStatus.PENDING_MEETING.getCode());
        order.setGuideId(8L);
        order.setReceivingSessionId(18L);
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);

        assertThat(callbackService.handle(successBody())).isTrue();

        verify(sessionTransitionService).restoreAfterOrderCancellation(order);
    }

    @Test
    void followUpSuccessCallbackShouldCompleteRemainingRefund() {
        TourOrder order = refundingOrder();
        order.setRefundAmount(new BigDecimal("16.00"));
        order.setRefundedAmount(new BigDecimal("20.00"));
        when(orderMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(order);
        JSONObject body = successBody();
        body.put("ord_amt", "16.00");

        assertThat(callbackService.handle(body)).isTrue();
        assertThat(order.getRefundedAmount()).isEqualByComparingTo("36.00");
        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.REFUNDED.getCode());
        assertThat(order.getStatus()).isEqualTo(OrderStatus.REFUNDED.getCode());
    }

    @Test
    void partialSuccessShouldCompleteOnlyTheMatchedRefundRecord() {
        TourOrderRefundMapper refundMapper = mock(TourOrderRefundMapper.class);
        callbackService = new HuifuRefundCallbackService(properties(), orderMapper, refundMapper);
        TourOrder order = refundingOrder();
        order.setId(99L);
        TourOrderRefund record = new TourOrderRefund();
        record.setOrderId(99L);
        record.setRefundOrderNo("RF001");
        record.setRefundAmount(new BigDecimal("20.00"));
        record.setRefundStatus(RefundStatus.REFUNDING.getCode());
        when(refundMapper.selectByRefundOrderNoForUpdate("RF001")).thenReturn(record);
        when(orderMapper.selectForUpdate(99L)).thenReturn(order);
        JSONObject body = successBody();
        body.put("ord_amt", "20.00");

        assertThat(callbackService.handle(body)).isTrue();

        assertThat(order.getRefundStatus()).isEqualTo(RefundStatus.PARTIAL.getCode());
        assertThat(record.getRefundStatus()).isEqualTo(RefundStatus.REFUNDED.getCode());
        verify(refundMapper).updateById(record);
    }

    private HuiFuProperties properties() {
        HuiFuProperties properties = new HuiFuProperties();
        properties.setHuifuId("merchant-1");
        return properties;
    }

    private TourOrder refundingOrder() {
        TourOrder order = new TourOrder();
        order.setRefundOrderNo("RF001");
        order.setRefundStatus(RefundStatus.REFUNDING.getCode());
        order.setRefundAmount(new BigDecimal("36.00"));
        order.setPaymentAmount(new BigDecimal("36.00"));
        return order;
    }

    private JSONObject successBody() {
        JSONObject body = new JSONObject();
        body.put("req_seq_id", "RF001");
        body.put("huifu_id", "merchant-1");
        body.put("refund_stat", "S");
        body.put("ord_amt", "36.00");
        body.put("end_time", "20260803180000");
        return body;
    }
}