// 数据接入服务
// 实现数据映射、转换、标准化和关联全局userId的核心逻辑

import { DATA_DICTIONARY } from "@/lib/data-dictionary"
import { IdentityService } from "./IdentityService"
import { getCollectionData } from "@/lib/mongodb-mock-connector"

export interface IngestionRequest {
  source: string
  sourceUserId?: string
  sourceRecordId?: string
  originalData: Record<string, any>
  timestamp?: string
}

export interface ProcessedUserData {
  userId: string
  coreProfile: Record<string, any>
  unifiedTags: string[]
  unifiedAttributes: Record<string, any>
  sourceProfiles: Array<{
    source: string
    sourceUserId?: string
    sourceRecordId?: string
    originalData: Record<string, any>
    contentActivity?: any[]
    interactionHistory?: any[]
    ingestionTimestamp: string
  }>
  aiInsights?: Record<string, any>
  crmInfo?: Record<string, any>
  createdAt?: string
  updatedAt: string
}

export class IngestionService {
  private static instance: IngestionService
  private identityService: IdentityService

  private constructor() {
    this.identityService = IdentityService.getInstance()
  }

  public static getInstance(): IngestionService {
    if (!IngestionService.instance) {
      IngestionService.instance = new IngestionService()
    }
    return IngestionService.instance
  }

  // 处理数据接入请求
  public async processIngestionRequest(request: IngestionRequest): Promise<ProcessedUserData> {
    try {
      // 1. 数据映射与转换
      const mappedData = await this.mapAndTransformData(request)

      // 2. 身份识别与关联
      const userId = await this.identifyOrCreateUser(mappedData)

      // 3. 构建统一用户数据结构
      const processedData = await this.buildUnifiedUserData(userId, request, mappedData)

      // 4. 数据质量检查
      await this.validateDataQuality(processedData)

      // 5. 存储到数据库（这里是模拟）
      await this.storeUserData(processedData)

      return processedData
    } catch (error) {
      console.error("数据接入处理失败:", error)
      throw new Error(`数据接入处理失败: ${(error as Error).message}`)
    }
  }

  // 数据映射与转换
  private async mapAndTransformData(request: IngestionRequest): Promise<Record<string, any>> {
    const mappedData: Record<string, any> = {}
    const sourceMappings = DATA_DICTIONARY.sourceMappings[request.source] || []

    for (const [sourceField, sourceValue] of Object.entries(request.originalData)) {
      const mapping = sourceMappings.find((m) => m.sourceField === sourceField)

      if (mapping) {
        let transformedValue = sourceValue

        // 应用转换规则
        if (mapping.transformRule) {
          transformedValue = this.applyTransformRule(sourceValue, mapping.transformRule)
        }

        // 应用验证规则
        if (mapping.validationRule) {
          const isValid = this.applyValidationRule(transformedValue, mapping.validationRule)
          if (!isValid) {
            console.warn(`字段 ${sourceField} 验证失败，跳过映射`)
            continue
          }
        }

        mappedData[mapping.targetField] = transformedValue
      } else {
        // 如果没有映射规则，保留原始字段名
        mappedData[sourceField] = sourceValue
      }
    }

    return mappedData
  }

  // 应用转换规则
  private applyTransformRule(value: any, rule: string): any {
    switch (rule) {
      case "prefix_dy_":
        return `dy_${value}`
      case "prefix_xhs_":
        return `xhs_${value}`
      case "lowercase":
        return typeof value === "string" ? value.toLowerCase() : value
      case "uppercase":
        return typeof value === "string" ? value.toUpperCase() : value
      case "trim":
        return typeof value === "string" ? value.trim() : value
      default:
        return value
    }
  }

  // 应用验证规则
  private applyValidationRule(value: any, rule: string): boolean {
    switch (rule) {
      case "required":
        return value !== null && value !== undefined && value !== ""
      case "email":
        return typeof value === "string" && /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value)
      case "phone":
        return typeof value === "string" && /^1[3-9]\d{9}$/.test(value)
      default:
        return true
    }
  }

  // 身份识别与关联
  private async identifyOrCreateUser(mappedData: Record<string, any>): Promise<string> {
    // 查找匹配的用户身份
    const matches = await this.identityService.findMatchingIdentity(mappedData)

    if (matches.length > 0 && matches[0].confidence > 0.8) {
      // 找到高置信度匹配，使用现有用户ID
      const bestMatch = matches[0]
      await this.identityService.updateIdentity(bestMatch.userId, mappedData)
      return bestMatch.userId
    } else {
      // 创建新用户身份
      return await this.identityService.createNewIdentity(mappedData)
    }
  }

  // 构建统一用户数据结构
  private async buildUnifiedUserData(
    userId: string,
    request: IngestionRequest,
    mappedData: Record<string, any>,
  ): Promise<ProcessedUserData> {
    // 获取现有用户数据（模拟）
    const existingUsers = await getCollectionData("users")
    const existingUser = existingUsers.find((user: any) => user._id === userId)

    const now = new Date().toISOString()

    // 构建核心档案
    const coreProfile: Record<string, any> = {}
    Object.keys(DATA_DICTIONARY.coreFields).forEach((field) => {
      if (mappedData[field]) {
        coreProfile[field] = mappedData[field]
      } else if (existingUser?.core_profile?.[field]) {
        coreProfile[field] = existingUser.core_profile[field]
      }
    })

    // 构建统一标签
    const unifiedTags = this.generateUnifiedTags(mappedData, request.source)

    // 构建统一属性
    const unifiedAttributes = this.generateUnifiedAttributes(mappedData, request.source)

    // 构建源档案
    const newSourceProfile = {
      source: request.source,
      sourceUserId: request.sourceUserId,
      sourceRecordId: request.sourceRecordId,
      originalData: request.originalData,
      contentActivity: this.extractContentActivity(request.originalData, request.source),
      interactionHistory: this.extractInteractionHistory(request.originalData, request.source),
      ingestionTimestamp: request.timestamp || now,
    }

    const sourceProfiles = existingUser?.source_profiles || []

    // 检查是否已存在相同来源的档案
    const existingSourceIndex = sourceProfiles.findIndex(
      (profile: any) =>
        profile.source === request.source &&
        (profile.sourceUserId === request.sourceUserId || profile.sourceRecordId === request.sourceRecordId),
    )

    if (existingSourceIndex >= 0) {
      // 更新现有源档案
      sourceProfiles[existingSourceIndex] = newSourceProfile
    } else {
      // 添加新的源档案
      sourceProfiles.push(newSourceProfile)
    }

    // 生成AI洞察
    const aiInsights = this.generateAIInsights(mappedData, request.source)

    return {
      userId,
      coreProfile,
      unifiedTags: [...new Set([...(existingUser?.unified_tags || []), ...unifiedTags])],
      unifiedAttributes: { ...(existingUser?.unified_attributes || {}), ...unifiedAttributes },
      sourceProfiles,
      aiInsights: { ...(existingUser?.ai_insights || {}), ...aiInsights },
      crmInfo: existingUser?.crm_info || {},
      createdAt: existingUser?.createdAt || now,
      updatedAt: now,
    }
  }

  // 生成统一标签
  private generateUnifiedTags(mappedData: Record<string, any>, source: string): string[] {
    const tags: string[] = []

    // 基于来源生成标签
    if (source === "douyin") {
      tags.push("抖音用户")
      if (mappedData.followerCount > 10000) {
        tags.push("抖音达人")
      }
    } else if (source === "xiaohongshu") {
      tags.push("小红书用户")
    } else if (source === "cunkebao_form") {
      tags.push("表单用户")
    } else if (source === "touchkebao_call") {
      tags.push("电话咨询用户")
    }

    // 基于数据内容生成标签
    if (mappedData.city) {
      tags.push(`${mappedData.city}地区`)
    }

    if (mappedData.birthDate) {
      const birthYear = new Date(mappedData.birthDate).getFullYear()
      const currentYear = new Date().getFullYear()
      const age = currentYear - birthYear

      if (age >= 18 && age < 30) {
        tags.push("年轻用户")
      } else if (age >= 30 && age < 50) {
        tags.push("中年用户")
      }
    }

    return tags
  }

  // 生成统一属性
  private generateUnifiedAttributes(mappedData: Record<string, any>, source: string): Record<string, any> {
    const attributes: Record<string, any> = {}

    // 基于来源设置属性
    if (source === "douyin" && mappedData.followerCount) {
      attributes.socialInfluence = mappedData.followerCount
    }

    if (source === "touchkebao_call") {
      attributes.lastContactTime = mappedData.callTime || new Date().toISOString()
      attributes.contactChannel = "phone"
    }

    if (source === "cunkebao_form") {
      attributes.lastContactTime = new Date().toISOString()
      attributes.contactChannel = "form"
    }

    // 设置活跃度
    attributes.lastActiveDays = 0 // 刚接入的数据认为是活跃的

    return attributes
  }

  // 提取内容活动
  private extractContentActivity(originalData: Record<string, any>, source: string): any[] {
    const activities: any[] = []

    if (source === "douyin" && originalData.videos) {
      originalData.videos.forEach((video: any) => {
        activities.push({
          contentId: video.id,
          type: "video",
          url: video.url,
          text: video.description,
          publishTime: video.createTime,
          likes: video.likeCount,
          comments: video.commentCount,
        })
      })
    }

    if (source === "xiaohongshu" && originalData.notes) {
      originalData.notes.forEach((note: any) => {
        activities.push({
          contentId: note.id,
          type: "note",
          url: note.url,
          text: note.content,
          publishTime: note.createTime,
          likes: note.likeCount,
          comments: note.commentCount,
        })
      })
    }

    return activities
  }

  // 提取互动历史
  private extractInteractionHistory(originalData: Record<string, any>, source: string): any[] {
    const interactions: any[] = []

    if (originalData.interactions) {
      originalData.interactions.forEach((interaction: any) => {
        interactions.push({
          type: interaction.type,
          targetId: interaction.targetId,
          content: interaction.content,
          time: interaction.time,
        })
      })
    }

    return interactions
  }

  // 生成AI洞察
  private generateAIInsights(mappedData: Record<string, any>, source: string): Record<string, any> {
    const insights: Record<string, any> = {}

    // 基于数据生成人设标签
    const personaTags: string[] = []

    if (source === "douyin") {
      personaTags.push("视频爱好者")
    }
    if (source === "xiaohongshu") {
      personaTags.push("生活分享者")
    }
    if (mappedData.city === "北京") {
      personaTags.push("一线城市用户")
    }

    insights.personaTags = personaTags
    insights.sentimentScore = 0.7 // 默认中性偏正面
    insights.potentialNeeds = this.inferPotentialNeeds(mappedData, source)

    return insights
  }

  // 推断潜在需求
  private inferPotentialNeeds(mappedData: Record<string, any>, source: string): string[] {
    const needs: string[] = []

    if (source === "touchkebao_call") {
      needs.push("产品咨询", "客服支持")
    }
    if (source === "cunkebao_form") {
      needs.push("产品了解", "营销活动")
    }
    if (source === "douyin") {
      needs.push("内容创作工具", "社交媒体管理")
    }

    return needs
  }

  // 数据质量检查
  private async validateDataQuality(data: ProcessedUserData): Promise<void> {
    const errors: string[] = []

    // 检查必需字段
    if (!data.userId) {
      errors.push("缺少用户ID")
    }

    // 检查数据完整性
    if (!data.coreProfile || Object.keys(data.coreProfile).length === 0) {
      errors.push("核心档案为空")
    }

    // 检查源档案
    if (!data.sourceProfiles || data.sourceProfiles.length === 0) {
      errors.push("缺少源档案数据")
    }

    if (errors.length > 0) {
      throw new Error(`数据质量检查失败: ${errors.join(", ")}`)
    }
  }

  // 存储用户数据（模拟）
  private async storeUserData(data: ProcessedUserData): Promise<void> {
    // 在实际应用中，这里会将数据存储到MongoDB
    console.log("存储用户数据:", {
      userId: data.userId,
      coreProfileFields: Object.keys(data.coreProfile).length,
      tagsCount: data.unifiedTags.length,
      sourceProfilesCount: data.sourceProfiles.length,
    })
  }

  // 批量处理数据接入
  public async processBatchIngestion(requests: IngestionRequest[]): Promise<ProcessedUserData[]> {
    const results: ProcessedUserData[] = []
    const errors: Array<{ request: IngestionRequest; error: string }> = []

    for (const request of requests) {
      try {
        const result = await this.processIngestionRequest(request)
        results.push(result)
      } catch (error) {
        errors.push({
          request,
          error: (error as Error).message,
        })
      }
    }

    if (errors.length > 0) {
      console.warn("批量处理中的错误:", errors)
    }

    return results
  }
}