package option

import (
	"github.com/sagernet/sing-box/common/json"
	C "github.com/sagernet/sing-box/constant"
	E "github.com/sagernet/sing/common/exceptions"
	M "github.com/sagernet/sing/common/metadata"
)

type _Outbound struct {
	Type                string                      `json:"type"`
	Tag                 string                      `json:"tag,omitempty"`
	DirectOptions       DirectOutboundOptions       `json:"-"`
	SocksOptions        SocksOutboundOptions        `json:"-"`
	HTTPOptions         HTTPOutboundOptions         `json:"-"`
	ShadowsocksOptions  ShadowsocksOutboundOptions  `json:"-"`
	VMessOptions        VMessOutboundOptions        `json:"-"`
	TrojanOptions       TrojanOutboundOptions       `json:"-"`
	WireGuardOptions    WireGuardOutboundOptions    `json:"-"`
	HysteriaOptions     HysteriaOutboundOptions     `json:"-"`
	TorOptions          TorOutboundOptions          `json:"-"`
	SSHOptions          SSHOutboundOptions          `json:"-"`
	ShadowTLSOptions    ShadowTLSOutboundOptions    `json:"-"`
	ShadowsocksROptions ShadowsocksROutboundOptions `json:"-"`
	VLESSOptions        VLESSOutboundOptions        `json:"-"`
	TUICOptions         TUICOutboundOptions         `json:"-"`
	SelectorOptions     SelectorOutboundOptions     `json:"-"`
	URLTestOptions      URLTestOutboundOptions      `json:"-"`
}

type Outbound _Outbound

func (h Outbound) MarshalJSON() ([]byte, error) {
	var v any
	switch h.Type {
	case C.TypeDirect:
		v = h.DirectOptions
	case C.TypeBlock, C.TypeDNS:
		v = nil
	case C.TypeSOCKS:
		v = h.SocksOptions
	case C.TypeHTTP:
		v = h.HTTPOptions
	case C.TypeShadowsocks:
		v = h.ShadowsocksOptions
	case C.TypeVMess:
		v = h.VMessOptions
	case C.TypeTrojan:
		v = h.TrojanOptions
	case C.TypeWireGuard:
		v = h.WireGuardOptions
	case C.TypeHysteria:
		v = h.HysteriaOptions
	case C.TypeTor:
		v = h.TorOptions
	case C.TypeSSH:
		v = h.SSHOptions
	case C.TypeShadowTLS:
		v = h.ShadowTLSOptions
	case C.TypeShadowsocksR:
		v = h.ShadowsocksROptions
	case C.TypeVLESS:
		v = h.VLESSOptions
	case C.TypeTUIC:
		v = h.TUICOptions
	case C.TypeSelector:
		v = h.SelectorOptions
	case C.TypeURLTest:
		v = h.URLTestOptions
	default:
		return nil, E.New("unknown outbound type: ", h.Type)
	}
	return MarshallObjects((_Outbound)(h), v)
}

func (h *Outbound) UnmarshalJSON(bytes []byte) error {
	err := json.Unmarshal(bytes, (*_Outbound)(h))
	if err != nil {
		return err
	}
	var v any
	switch h.Type {
	case C.TypeDirect:
		v = &h.DirectOptions
	case C.TypeBlock, C.TypeDNS:
		v = nil
	case C.TypeSOCKS:
		v = &h.SocksOptions
	case C.TypeHTTP:
		v = &h.HTTPOptions
	case C.TypeShadowsocks:
		v = &h.ShadowsocksOptions
	case C.TypeVMess:
		v = &h.VMessOptions
	case C.TypeTrojan:
		v = &h.TrojanOptions
	case C.TypeWireGuard:
		v = &h.WireGuardOptions
	case C.TypeHysteria:
		v = &h.HysteriaOptions
	case C.TypeTor:
		v = &h.TorOptions
	case C.TypeSSH:
		v = &h.SSHOptions
	case C.TypeShadowTLS:
		v = &h.ShadowTLSOptions
	case C.TypeShadowsocksR:
		v = &h.ShadowsocksROptions
	case C.TypeVLESS:
		v = &h.VLESSOptions
	case C.TypeTUIC:
		v = &h.TUICOptions
	case C.TypeSelector:
		v = &h.SelectorOptions
	case C.TypeURLTest:
		v = &h.URLTestOptions
	default:
		return E.New("unknown outbound type: ", h.Type)
	}
	err = UnmarshallExcluded(bytes, (*_Outbound)(h), v)
	if err != nil {
		return E.Cause(err, "outbound options")
	}
	return nil
}

type DialerOptions struct {
	Detour             string         `json:"detour,omitempty"`
	BindInterface      string         `json:"bind_interface,omitempty"`
	Inet4BindAddress   *ListenAddress `json:"inet4_bind_address,omitempty"`
	Inet6BindAddress   *ListenAddress `json:"inet6_bind_address,omitempty"`
	ProtectPath        string         `json:"protect_path,omitempty"`
	RoutingMark        int            `json:"routing_mark,omitempty"`
	ReuseAddr          bool           `json:"reuse_addr,omitempty"`
	ConnectTimeout     Duration       `json:"connect_timeout,omitempty"`
	TCPFastOpen        bool           `json:"tcp_fast_open,omitempty"`
	UDPFragment        *bool          `json:"udp_fragment,omitempty"`
	UDPFragmentDefault bool           `json:"-"`
	DomainStrategy     DomainStrategy `json:"domain_strategy,omitempty"`
	FallbackDelay      Duration       `json:"fallback_delay,omitempty"`
}

type ServerOptions struct {
	Server     string `json:"server"`
	ServerPort uint16 `json:"server_port"`
}

func (o ServerOptions) Build() M.Socksaddr {
	return M.ParseSocksaddrHostPort(o.Server, o.ServerPort)
}

type MultiplexOptions struct {
	Enabled        bool   `json:"enabled,omitempty"`
	Protocol       string `json:"protocol,omitempty"`
	MaxConnections int    `json:"max_connections,omitempty"`
	MinStreams     int    `json:"min_streams,omitempty"`
	MaxStreams     int    `json:"max_streams,omitempty"`
	Padding        bool   `json:"padding,omitempty"`
}