package tdesktop

import (
	"time"

	"github.com/gotd/td/tg"
)

// BuildConfig 构造 help.getConfig 返回的 tg.Config，含自建 DC 的 DCOptions。
//
// 字段值取 Telegram 常见默认；TDesktop 联调阶段按客户端实际需要微调
// （记录于 docs/compatibility-matrix.md）。
func BuildConfig(dc int, ip string, port int, now time.Time) *tg.Config {
	return &tg.Config{
		Date:     int(now.Unix()),
		Expires:  int(now.Add(time.Hour).Unix()),
		TestMode: false,
		ThisDC:   dc,
		DCOptions: []tg.DCOption{
			{ID: dc, IPAddress: ip, Port: port, Static: true},
		},
		ChatSizeMax:          200,
		MegagroupSizeMax:     200000,
		ForwardedCountMax:    100,
		OnlineUpdatePeriodMs: 120000,
		OfflineBlurTimeoutMs: 5000,
		OfflineIdleTimeoutMs: 30000,
		OnlineCloudTimeoutMs: 300000,
		NotifyCloudDelayMs:   30000,
		NotifyDefaultDelayMs: 1500,
		PushChatPeriodMs:     60000,
		PushChatLimit:        2,
		EditTimeLimit:        172800,
		RevokeTimeLimit:      172800,
		RevokePmTimeLimit:    172800,
		RatingEDecay:         2419200,
		StickersRecentLimit:  200,
		CallReceiveTimeoutMs: 20000,
		CallRingTimeoutMs:    90000,
		CallConnectTimeoutMs: 30000,
		CallPacketTimeoutMs:  10000,
		MeURLPrefix:          "https://t.me/",
		CaptionLengthMax:     1024,
		MessageLengthMax:     4096,
		WebfileDCID:          dc,
	}
}

// NearestDC 构造 help.getNearestDc 返回值。
func NearestDC(dc int) *tg.NearestDC {
	return &tg.NearestDC{
		Country:   "US",
		ThisDC:    dc,
		NearestDC: dc,
	}
}