import type { Contact, Message } from '../../shared/types'
import { exportGroupReport } from '../group-report-service'
import { getGroupSnapshot, listMessages, resolveMd5 } from './chat-service'
import { AIProviderService } from './ai-provider-service'
import {
  buildGroupReportInput,
  getSummaryDateRange,
  GROUP_REPORT_SYSTEM_PROMPT,
  isInternalName,
  parseGroupDailyReport,
  type SummaryDateRange
} from '../../renderer/src/utils/group-report'

const aiProvider = new AIProviderService()

export interface AgentGroupReportRequest {
  group: string
  range?: SummaryDateRange
}

export interface AgentGroupReportResult {
  success: boolean
  groupName?: string
  pngPath?: string
  messageCount?: number
  error?: string
}

export async function generateAgentGroupReport(
  request: AgentGroupReportRequest
): Promise<AgentGroupReportResult> {
  const query = String(request.group || '')
    .trim()
    .replace(/群聊?$/, '')
    .trim()
  if (!query) return { success: false, error: '缺少群聊名称' }
  const contact = resolveMd5(query)
  if (!contact) return { success: false, error: `没有找到群聊“${query}”` }
  if (contact.type !== 'group' && !contact.m_nsUsrName.endsWith('@chatroom')) {
    return { success: false, error: `“${query}”不是群聊` }
  }

  const range = request.range === 'yesterday' || request.range === '7days' ? request.range : 'today'
  const { startTime, endTime } = getSummaryDateRange(range)
  let messages = listMessages(contact.md5, startTime, endTime) as Message[]
  if (!messages.length) return { success: false, error: '所选时间范围没有可总结的消息' }

  const snapshot = getGroupSnapshot(contact.md5)
  if (snapshot) {
    const members = new Map(
      snapshot.members.map((member) => [
        member.wxid,
        { name: member.nickname, avatar: member.avatar }
      ])
    )
    messages = messages.map((message) => {
      if (!isInternalName(message.name)) return message
      const member = members.get(String(message.senderId || message.name || ''))
      return member?.name
        ? { ...message, name: member.name, img: message.img || member.avatar }
        : message
    })
  }

  const input = await buildGroupReportInput(messages, contact as Contact, true, 'full')
  const ai = await aiProvider.chat([
    { role: 'system', content: GROUP_REPORT_SYSTEM_PROMPT },
    { role: 'user', content: input.prompt }
  ])
  if (!ai.success || !ai.data) return { success: false, error: ai.error || 'AI 总结失败' }
  const report = parseGroupDailyReport(
    ai.data,
    input.topSpeakers,
    input.activeTimeline,
    input.voiceLeaderboard,
    input.metadata,
    input.media
  )
  const exported = await exportGroupReport({ report, metadata: input.metadata })
  if (!exported.success || !exported.pngPath) {
    return { success: false, error: exported.error || '总结图片生成失败' }
  }
  return {
    success: true,
    groupName: input.metadata.groupName,
    pngPath: exported.pngPath,
    messageCount: messages.length
  }
}