import type { ConversationData, ImMessage } from './types'

export function buildDbName(appKey: string, userId: string): string {
  return `xuqm_im_${appKey}_${userId}`
}

export function sortMessages(messages: ImMessage[]): ImMessage[] {
  const deduped = new Map<string, ImMessage>()
  messages.forEach((message) => {
    const existing = deduped.get(message.id)
    if (!existing || message.createdAt >= existing.createdAt) {
      deduped.set(message.id, message)
    }
  })
  return [...deduped.values()]
    .sort((a, b) => {
      if (b.createdAt !== a.createdAt) return b.createdAt - a.createdAt
      return b.id.localeCompare(a.id)
    })
}

export function sortConversations(conversations: ConversationData[]): ConversationData[] {
  return [...conversations].sort((a, b) => {
    if (a.isPinned !== b.isPinned) return Number(b.isPinned) - Number(a.isPinned)
    if (b.lastMsgTime !== a.lastMsgTime) return b.lastMsgTime - a.lastMsgTime
    return `${a.chatType}:${a.targetId}`.localeCompare(`${b.chatType}:${b.targetId}`)
  })
}