package com.tourguide.modules.order.dto;

import com.tourguide.modules.order.entity.TourOrder;
import com.tourguide.modules.operation.entity.ScenicMeetingPoint;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.Collections;
import java.util.List;

/** 导游端订单列表与详情返回对象，仅暴露导游工作台需要的订单信息。 */
public class GuideOrderResponse {
    private final Long id;
    private final String orderNo;
    private final Long scenicSpotId;
    private final String scenicName;
    private final String scenicShortName;
    private final Long meetingPointId;
    private final String meetingPointName;
    private final String meetingPointAddress;
    private final BigDecimal meetingPointLongitude;
    private final BigDecimal meetingPointLatitude;
    private final String serviceName;
    private final Integer durationMinutes;
    private final Integer quantity;
    private final String status;
    private final LocalDateTime receiveTime;
    private final LocalDateTime receiveStartTime;
    private final LocalDateTime lectureStartTime;
    private final LocalDateTime lectureEndTime;
    private final LocalDateTime completedAt;
    private final BigDecimal paymentAmount;
    private final BigDecimal earningAmount;
    private final String customerPhone;
    private final List<Customer> customers;

    private GuideOrderResponse(TourOrder order, Integer configuredDurationMinutes, ScenicMeetingPoint meetingPoint) {
        this.id = order.getId();
        this.orderNo = order.getOrderNo();
        this.scenicSpotId = order.getScenicSpotId();
        this.scenicName = order.getScenicName();
        this.scenicShortName = shortScenicName(order.getScenicName());
        this.meetingPointId = order.getMeetingPointId() != null
                ? order.getMeetingPointId() : meetingPoint == null ? null : meetingPoint.getId();
        this.meetingPointName = valueOrFallback(order.getMeetingPointName(),
                meetingPoint == null ? null : meetingPoint.getPointName());
        this.meetingPointAddress = meetingPoint == null ? null : meetingPoint.getAddress();
        this.meetingPointLongitude = meetingPoint == null ? null : meetingPoint.getLongitude();
        this.meetingPointLatitude = meetingPoint == null ? null : meetingPoint.getLatitude();
        this.serviceName = serviceName(order);
        this.durationMinutes = durationMinutes(configuredDurationMinutes, order.getOrderType());
        this.quantity = order.getPeopleCount() == null ? 0 : order.getPeopleCount();
        this.status = guideStatus(order.getStatus());
        this.receiveTime = firstPresent(order.getAcceptedAt(), order.getPlacedAt(), order.getCreatedAt());
        this.receiveStartTime = this.receiveTime;
        this.lectureStartTime = firstPresent(order.getServiceStartedAt(), order.getArrivedAt());
        this.lectureEndTime = order.getCompletedAt();
        this.completedAt = order.getCompletedAt();
        this.paymentAmount = order.getPaymentAmount() == null ? order.getAmount() : order.getPaymentAmount();
        this.earningAmount = order.getGuideEarningAmount();
        this.customerPhone = order.getVisitorMobile();
        this.customers = Collections.singletonList(new Customer(
                1,
                order.getVisitorMobile(),
                this.quantity,
                firstPresent(order.getAcceptedAt(), order.getPlacedAt(), order.getCreatedAt())));
    }

    public static GuideOrderResponse from(TourOrder order) {
        return from(order, null, null);
    }

    public static GuideOrderResponse from(TourOrder order, Integer configuredDurationMinutes) {
        return from(order, configuredDurationMinutes, null);
    }

    public static GuideOrderResponse from(TourOrder order, Integer configuredDurationMinutes,
                                          ScenicMeetingPoint meetingPoint) {
        return new GuideOrderResponse(order, configuredDurationMinutes, meetingPoint);
    }

    private static String guideStatus(String orderStatus) {
        if ("IN_SERVICE".equals(orderStatus)) { return "serving"; }
        if ("COMPLETED".equals(orderStatus)) { return "completed"; }
        if ("CANCELLED".equals(orderStatus) || "REFUNDED".equals(orderStatus)) { return "canceled"; }
        return "accepted";
    }

    private static String serviceName(TourOrder order) {
        if (order.getPackageName() != null && !order.getPackageName().trim().isEmpty()) {
            return order.getPackageName();
        }
        if ("GROUP_PREMIUM".equals(order.getOrderType())) { return "拼团 · 精讲"; }
        if ("PRIVATE_QUICK".equals(order.getOrderType())) { return "包团 · 快讲"; }
        if ("PRIVATE_PREMIUM".equals(order.getOrderType())) { return "包团 · 精讲"; }
        return "拼团 · 快讲";
    }

    private static Integer durationMinutes(Integer configuredDurationMinutes, String orderType) {
        if (configuredDurationMinutes != null && configuredDurationMinutes > 0) {
            return configuredDurationMinutes;
        }
        if ("GROUP_PREMIUM".equals(orderType) || "PRIVATE_PREMIUM".equals(orderType)) {
            return 60;
        }
        return 30;
    }

    private static String shortScenicName(String scenicName) {
        if (scenicName == null || scenicName.trim().isEmpty()) {
            return "";
        }
        return scenicName.replace("景区", "");
    }

    private static String valueOrFallback(String value, String fallback) {
        return value == null || value.trim().isEmpty() ? fallback : value;
    }

    private static LocalDateTime firstPresent(LocalDateTime first, LocalDateTime second) {
        return first == null ? second : first;
    }

    private static LocalDateTime firstPresent(LocalDateTime first, LocalDateTime second, LocalDateTime third) {
        return firstPresent(firstPresent(first, second), third);
    }

    public Long getId() { return id; }
    public String getOrderNo() { return orderNo; }
    public Long getScenicSpotId() { return scenicSpotId; }
    public String getScenicName() { return scenicName; }
    public String getScenicShortName() { return scenicShortName; }
    public Long getMeetingPointId() { return meetingPointId; }
    public String getMeetingPointName() { return meetingPointName; }
    public String getMeetingPointAddress() { return meetingPointAddress; }
    public BigDecimal getMeetingPointLongitude() { return meetingPointLongitude; }
    public BigDecimal getMeetingPointLatitude() { return meetingPointLatitude; }
    public String getServiceName() { return serviceName; }
    public Integer getDurationMinutes() { return durationMinutes; }
    public Integer getQuantity() { return quantity; }
    public String getStatus() { return status; }
    public LocalDateTime getReceiveTime() { return receiveTime; }
    public LocalDateTime getReceiveStartTime() { return receiveStartTime; }
    public LocalDateTime getLectureStartTime() { return lectureStartTime; }
    public LocalDateTime getLectureEndTime() { return lectureEndTime; }
    public LocalDateTime getCompletedAt() { return completedAt; }
    public BigDecimal getPaymentAmount() { return paymentAmount; }
    public BigDecimal getEarningAmount() { return earningAmount; }
    public String getCustomerPhone() { return customerPhone; }
    public List<Customer> getCustomers() { return customers; }

    public static class Customer {
        private final int no;
        private final String phone;
        private final int people;
        private final LocalDateTime time;

        public Customer(int no, String phone, int people, LocalDateTime time) {
            this.no = no;
            this.phone = phone;
            this.people = people;
            this.time = time;
        }

        public int getNo() { return no; }
        public String getPhone() { return phone; }
        public int getPeople() { return people; }
        public LocalDateTime getTime() { return time; }
    }
}