/**
 * 会话列表：拉取并更新 chatStore.contacts
 */
import { getContacts, getToken } from '../utils/api'
import { chatStore } from '../store/chat'

/**
 * 拉取会话列表
 * @param {{ silent?: boolean }} [opts] - silent 为 false 时会置 loadingContacts（默认 true：刷新不闪屏、不挡列表）
 */
export async function fetchContactsList(opts = {}) {
	const silent = opts.silent !== false
	const token = getToken()
	if (!token) {
		chatStore.contacts = []
		chatStore.contactsFetchFailed = false
		return
	}
	if (!silent) chatStore.loadingContacts = true
	try {
		const data = await getContacts(token)
		const list = Array.isArray(data) ? data : (data.list || data.items || data.conversations || [])
		chatStore.setContacts(
			list.map((c) => {
				const id = String(c.user_id ?? c.userId ?? c.id ?? '')
				const unreadCount = Number(c.unread_count ?? c.unreadCount ?? 0) || 0
				return {
					id,
					user_id: c.user_id ?? c.userId ?? c.id,
					title: c.full_name ?? c.name ?? c.title ?? '未知',
					lastMessage: typeof c.last_message === 'string'
						? c.last_message
						: (c.last_message && (c.last_message.content || c.last_message.text)) ?? c.last_message_preview ?? '',
					time: c.updated_at ?? c.last_message?.created_at ?? '',
					avatar: c.avatar ?? c.avatar_url ?? '',
					unread_count: unreadCount,
					is_system: !!c.is_system,
					app_id: c.app_id ?? null,
					app_name: c.app_name ?? ''
				}
			})
		)
		chatStore.contactsFetchFailed = false
	} catch (e) {
		// 网络或接口失败：不覆盖已有会话列表；空列表时用于展示「请下拉刷新」
		chatStore.contactsFetchFailed = true
	} finally {
		if (!silent) chatStore.loadingContacts = false
	}
}

export function useContacts() {
	return {
		contacts: chatStore.contacts,
		loadingContacts: chatStore.loadingContacts,
		fetchContacts: fetchContactsList
	}
}