/**
 * 人群包服务
 * 负责人群包管理相关的API调用
 */

import apiClient from '@/infrastructure/api/client';
import { API_ENDPOINTS } from '@/infrastructure/api/endpoints';

// =====================
// 类型定义
// =====================

/** 条件操作符 */
export type ConditionOperator =
  | 'EQUALS'
  | 'NOT_EQUALS'
  | 'CONTAINS'
  | 'NOT_CONTAINS'
  | 'GREATER_THAN'
  | 'LESS_THAN'
  | 'BETWEEN'
  | 'IN'
  | 'NOT_IN'
  | 'IS_NULL'
  | 'IS_NOT_NULL'
  | 'HAS_TAG'
  | 'NOT_HAS_TAG';

/** 逻辑操作符 */
export type LogicOperator = 'AND' | 'OR';

/** 人群包状态 */
export type SegmentStatus = 'DRAFT' | 'ACTIVE' | 'ARCHIVED';

/** 条件项 */
export interface SegmentCondition {
  field: string;
  operator: ConditionOperator;
  value?: string | number | boolean | string[];
}

/** 条件组 */
export interface SegmentConditionGroup {
  logic: LogicOperator;
  conditions: SegmentCondition[];
}

/** 人群包 */
export interface AudienceSegment {
  id: string;
  name: string;
  description: string | null;
  conditionGroups: SegmentConditionGroup[];
  groupsLogic: LogicOperator;
  status: SegmentStatus;
  estimatedUsers: number | null;
  lastRefreshedAt: string | null;
  isEnabled: boolean;
  createdAt: string;
  updatedAt: string;
  createdBy: string;
}

/** 创建人群包请求 */
export interface CreateSegmentRequest {
  name: string;
  description?: string;
  conditionGroups: SegmentConditionGroup[];
  groupsLogic?: LogicOperator;
}

/** 更新人群包请求 */
export interface UpdateSegmentRequest {
  name?: string;
  description?: string;
  conditionGroups?: SegmentConditionGroup[];
  groupsLogic?: LogicOperator;
  status?: SegmentStatus;
  isEnabled?: boolean;
}

/** 人群包列表查询参数 */
export interface ListSegmentsParams {
  status?: SegmentStatus;
  isEnabled?: boolean;
  limit?: number;
  offset?: number;
}

/** 分页响应 */
export interface PaginatedResponse<T> {
  items: T[];
  total: number;
}

// =====================
// 选项常量
// =====================

/** 人群包状态选项 */
export const SEGMENT_STATUS_OPTIONS = [
  { value: 'DRAFT', label: '草稿', color: 'gray' },
  { value: 'ACTIVE', label: '已激活', color: 'green' },
  { value: 'ARCHIVED', label: '已归档', color: 'yellow' },
] as const;

/** 条件操作符选项 */
export const CONDITION_OPERATOR_OPTIONS = [
  { value: 'EQUALS', label: '等于', group: 'comparison' },
  { value: 'NOT_EQUALS', label: '不等于', group: 'comparison' },
  { value: 'CONTAINS', label: '包含', group: 'string' },
  { value: 'NOT_CONTAINS', label: '不包含', group: 'string' },
  { value: 'GREATER_THAN', label: '大于', group: 'number' },
  { value: 'LESS_THAN', label: '小于', group: 'number' },
  { value: 'BETWEEN', label: '在...之间', group: 'number' },
  { value: 'IN', label: '在列表中', group: 'list' },
  { value: 'NOT_IN', label: '不在列表中', group: 'list' },
  { value: 'IS_NULL', label: '为空', group: 'null' },
  { value: 'IS_NOT_NULL', label: '不为空', group: 'null' },
  { value: 'HAS_TAG', label: '有标签', group: 'tag' },
  { value: 'NOT_HAS_TAG', label: '无标签', group: 'tag' },
] as const;

/** 可用字段选项 */
export const SEGMENT_FIELD_OPTIONS = [
  // 用户基础属性
  { value: 'registrationDays', label: '注册天数', type: 'number' },
  { value: 'lastLoginDays', label: '最后登录距今天数', type: 'number' },
  { value: 'province', label: '省份', type: 'string' },
  { value: 'city', label: '城市', type: 'string' },
  // 消费行为
  { value: 'totalPurchaseAmount', label: '累计消费金额', type: 'number' },
  { value: 'purchaseCount', label: '购买次数', type: 'number' },
  { value: 'lastPurchaseDays', label: '最后购买距今天数', type: 'number' },
  { value: 'averageOrderAmount', label: '平均订单金额', type: 'number' },
  // 邀请数据
  { value: 'totalInvites', label: '累计邀请人数', type: 'number' },
  { value: 'directInvites', label: '直接邀请人数', type: 'number' },
  // 标签
  { value: 'tag', label: '用户标签', type: 'tag' },
] as const;

// =====================
// 服务方法
// =====================

export const audienceSegmentService = {
  /** 获取人群包列表 */
  async getSegments(params: ListSegmentsParams = {}): Promise<PaginatedResponse<AudienceSegment>> {
    return apiClient.get(API_ENDPOINTS.AUDIENCE_SEGMENTS.LIST, { params });
  },

  /** 获取人群包详情 */
  async getSegment(id: string): Promise<AudienceSegment> {
    return apiClient.get(API_ENDPOINTS.AUDIENCE_SEGMENTS.DETAIL(id));
  },

  /** 创建人群包 */
  async createSegment(data: CreateSegmentRequest): Promise<AudienceSegment> {
    return apiClient.post(API_ENDPOINTS.AUDIENCE_SEGMENTS.CREATE, data);
  },

  /** 更新人群包 */
  async updateSegment(id: string, data: UpdateSegmentRequest): Promise<AudienceSegment> {
    return apiClient.put(API_ENDPOINTS.AUDIENCE_SEGMENTS.UPDATE(id), data);
  },

  /** 删除人群包 */
  async deleteSegment(id: string): Promise<void> {
    return apiClient.delete(API_ENDPOINTS.AUDIENCE_SEGMENTS.DELETE(id));
  },

  /** 刷新人群包 (重新计算用户数) */
  async refreshSegment(id: string): Promise<AudienceSegment> {
    return apiClient.post(API_ENDPOINTS.AUDIENCE_SEGMENTS.REFRESH(id));
  },
};

export default audienceSegmentService;