package web

import (
	"net"

	ice "shylinux.com/x/icebergs"
	"shylinux.com/x/icebergs/base/aaa"
	"shylinux.com/x/icebergs/base/ctx"
	"shylinux.com/x/icebergs/base/mdb"
	"shylinux.com/x/icebergs/base/tcp"
	kit "shylinux.com/x/toolkits"
)

func _broad_addr(m *ice.Message, host, port string) *net.UDPAddr {
	addr, err := net.ResolveUDPAddr("udp4", kit.Format("%s:%s", host, port))
	m.Assert(err)
	return addr
}
func _broad_send(m *ice.Message, host, port string, remote_host, remote_port string) {
	if s, e := net.DialUDP("udp", nil, _broad_addr(m, remote_host, remote_port)); m.Assert(e) {
		defer s.Close()
		msg := m.Spawn(kit.Dict(tcp.HOST, host, tcp.PORT, port))
		m.Logs(mdb.EXPORT, BROAD, msg.FormatMeta(), "to", remote_host+ice.DF+remote_port)
		s.Write([]byte(msg.FormatMeta()))
	}
}
func _broad_serve(m *ice.Message, host, port string) {
	_broad_send(m, host, port, "255.255.255.255", "9020")
	if s, e := net.ListenUDP("udp", _broad_addr(m, "0.0.0.0", port)); m.Assert(e) {
		defer s.Close()
		mdb.HashCreate(m, tcp.HOST, host, tcp.PORT, port, kit.Dict(mdb.TARGET, s))
		buf := make([]byte, ice.MOD_BUFS)
		for {
			n, addr, err := s.ReadFromUDP(buf[:])
			if err != nil {
				break
			}
			m.Logs(mdb.IMPORT, BROAD, string(buf[:n]), "from", addr)
			msg := m.Spawn(buf[:n])
			if m.Cmd(BROAD, kit.Format("%s,%s", msg.Option(tcp.HOST), msg.Option(tcp.PORT))).Length() > 0 {
				continue
			}
			if remote, err := net.ResolveUDPAddr("udp4", kit.Format("%s:%s", msg.Option(tcp.HOST), msg.Option(tcp.PORT))); !m.Warn(err) {
				m.Cmd(BROAD, func(value ice.Maps) {
					m.Logs(mdb.EXPORT, BROAD, kit.Format(value), "to", kit.Format(remote))
					s.WriteToUDP([]byte(m.Spawn(value).FormatMeta()), remote)
				})
				mdb.HashCreate(m, msg.OptionSimple(tcp.HOST, tcp.PORT))
			}
		}
	}
}

const BROAD = "broad"

func init() {
	Index.MergeCommands(ice.Commands{
		BROAD: {Name: "broad hash auto serve", Help: "广播", Actions: ice.MergeActions(ice.Actions{
			SERVE: {Name: "serve port=9020", Hand: func(m *ice.Message, arg ...string) {
				_broad_serve(m, m.Cmd(tcp.HOST).Append(aaa.IP), m.Option(tcp.PORT))
			}},
			OPEN: {Hand: func(m *ice.Message, arg ...string) {
				ctx.ProcessOpen(m, kit.Format("http://%s:%s", m.Option(tcp.HOST), m.Option(tcp.PORT)))
			}},
		}, mdb.HashAction(mdb.SHORT, "host,port", mdb.FIELD, "time,hash,host,port", mdb.ACTION, OPEN), mdb.ExitClearHashAction())},
	})
}