package internal

import "admin/lib/httpclient"

type ServerInfo struct {
	ServerId           string `json:"serverId"`
	ServerName         string `json:"serverName"`
	Ccu                int    `json:"ccu"`
	TotalRoleCount     int    `json:"total_role_count"`
	TotalAccountCount  int    `json:"total_account_count"`
	Addr               string `json:"addr"`
	OpenWhitelistLogin bool   `json:"open_whitelist_login"`
}

type ServerInfoList []*ServerInfo

type PageServerCountInfo struct {
	Offset  int
	Count   int
	RawInfo *ServerInfo
}

type PageInfo struct {
	PageNo     int                    // 页数，从1开始
	Count      int                    // 当前页的数量，一般是pageLen，但如果是最后一页可能不足
	ServerList []*PageServerCountInfo // 参与组成这一页的服务器列表
}

func (list ServerInfoList) TidyToPageList(pageLen int, queryCountField func(info *ServerInfo) int) (totalCount int, pageList []*PageInfo) {
	curPageNo := 1
	curPageNeedCount := pageLen
	var curPageInfo *PageInfo
	for _, serverInfo := range list {
		serverCount := queryCountField(serverInfo)
		totalCount += serverCount
		serverRestCount := serverCount
		serverAccOffset := 0

		for {
			if serverRestCount >= curPageNeedCount {
				// 当前页数量足够，切下一页
				if curPageInfo == nil {
					curPageInfo = &PageInfo{
						PageNo: curPageNo,
					}
				}
				curPageInfo.Count += curPageNeedCount
				curPageInfo.ServerList = append(curPageInfo.ServerList, &PageServerCountInfo{
					RawInfo: serverInfo,
					Offset:  serverAccOffset,
					Count:   curPageNeedCount,
				})

				// 切下一个页
				// 置空，等待下一次循环判断来创建
				pageList = append(pageList, curPageInfo)
				curPageInfo = nil
				serverRestCount -= curPageNeedCount
				serverAccOffset += curPageNeedCount
				curPageNeedCount = pageLen
				curPageNo += 1

				if serverRestCount <= 0 {
					// 当前服务器没有余额了，也要切下一个服务器
					break
				}
			} else {
				// 当前页还不够，切下一个服务器信息
				if curPageInfo == nil {
					curPageInfo = &PageInfo{
						PageNo: curPageNo,
					}
				}
				curPageInfo.Count += serverRestCount
				curPageInfo.ServerList = append(curPageInfo.ServerList, &PageServerCountInfo{
					RawInfo: serverInfo,
					Offset:  serverAccOffset,
					Count:   serverRestCount,
				})

				// 切下一个服务器，页面不切
				serverAccOffset += serverRestCount
				curPageNeedCount -= serverRestCount
				break
			}
		}
	}

	if curPageInfo != nil { // 最后一页还没达到数量的
		pageList = append(pageList, curPageInfo)
	}
	return
}

type RspData struct {
	Code int    `json:"code"`
	Msg  string `json:"msg"`
	Data struct {
		List []*ServerInfo `json:"list"`
	} `json:"data"`
}

func GetRemoteServerInfoList(alisrvAddr string) (ServerInfoList, error) {
	rsp := &RspData{}
	err := httpclient.Request(alisrvAddr+"/server", "get", nil, rsp)
	if err != nil {
		return nil, err
	}
	return rsp.Data.List, nil
}