package com.org.flashsalesystem.dto;

import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.validation.constraints.DecimalMin;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import java.math.BigDecimal;
import java.time.LocalDateTime;

/**
 * 限时活动数据传输对象
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class FlashSaleDTO {

    private Long id;
    private Long productId;
    private String productName;
    private String productImageUrl;
    private BigDecimal originalPrice;
    private BigDecimal flashPrice;
    private Integer flashStock;
    private Integer remainingStock;

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime startTime;

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime endTime;

    private Integer status;

    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime createdAt;

    // 活动状态描述
    private String statusDescription;
    // 是否可以参与限时活动
    private Boolean canParticipate;
    // 距离开始时间（毫秒）
    private Long timeToStart;
    // 距离结束时间（毫秒）
    private Long timeToEnd;

    /**
     * 创建限时活动DTO
     */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class CreateDTO {
        @NotNull(message = "商品ID不能为空")
        private Long productId;

        @NotNull(message = "活动价格不能为空")
        @DecimalMin(value = "0.01", message = "活动价格必须大于0")
        private BigDecimal flashPrice;

        @Min(value = 1, message = "活动库存必须大于0")
        private Integer flashStock;

        @NotNull(message = "开始时间不能为空")
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime startTime;

        @NotNull(message = "结束时间不能为空")
        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime endTime;
    }

    /**
     * 更新限时活动DTO
     */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class UpdateDTO {
        @DecimalMin(value = "0.01", message = "活动价格必须大于0")
        private BigDecimal flashPrice;

        @Min(value = 1, message = "活动库存必须大于0")
        private Integer flashStock;

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime startTime;

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime endTime;

        @Min(value = 1, message = "状态值无效")
        @Max(value = 3, message = "状态值无效")
        private Integer status;
    }

    /**
     * 限时活动参与DTO
     */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class ParticipateDTO {
        @NotNull(message = "限时活动ID不能为空")
        private Long flashSaleId;

        @Min(value = 1, message = "购买数量必须大于0")
        private Integer quantity = 1;

        // 用户地址信息（可选）
        private String address;
        private String phone;
    }

    /**
     * 限时活动查询DTO
     */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class QueryDTO {
        private Integer status; // 活动状态
        private Long productId; // 商品ID

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime startTime;

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime endTime;
        private Integer page = 0;
        private Integer size = 10;
        private String sortBy = "startTime";
        private String sortDirection = "asc";
    }

    /**
     * 限时活动结果DTO
     */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class ResultDTO {
        private Boolean success;
        private String message;
        private Long orderId;
        private Long flashSaleId;
        private Long productId;
        private String productName;
        private Integer quantity;
        private BigDecimal totalPrice;

        @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
        private LocalDateTime orderTime;

        // 排队信息（如果需要排队）
        private Integer queuePosition;
        private Long estimatedWaitTime;
    }
}