package dcom

import (
	"context"
	"fmt"
	"strings"
	"unicode/utf16"

	dcerpc "github.com/oiweiwei/go-msrpc/dcerpc"
	errors "github.com/oiweiwei/go-msrpc/dcerpc/errors"
	uuid "github.com/oiweiwei/go-msrpc/midl/uuid"
	dcom "github.com/oiweiwei/go-msrpc/msrpc/dcom"
	iremunknown "github.com/oiweiwei/go-msrpc/msrpc/dcom/iremunknown/v0"
	iremunknown2 "github.com/oiweiwei/go-msrpc/msrpc/dcom/iremunknown2/v0"
	ndr "github.com/oiweiwei/go-msrpc/ndr"
)

var (
	_ = context.Background
	_ = fmt.Errorf
	_ = utf16.Encode
	_ = strings.TrimPrefix
	_ = ndr.ZeroString
	_ = (*uuid.UUID)(nil)
	_ = (*dcerpc.SyntaxID)(nil)
	_ = (*errors.Error)(nil)
	_ = dcom.GoPackage
	_ = iremunknown.GoPackage
	_ = iremunknown2.GoPackage
)

var (
	// import guard
	GoPackage = "dcom"
)

// dcom client set.
type Client interface {

	// Package specific interfaces
	RemoteUnknown() iremunknown.RemoteUnknownClient
	RemoteUnknown2() iremunknown2.RemoteUnknown2Client
	// AlterContext alters the client context.
	AlterContext(context.Context, ...dcerpc.Option) error

	// Conn returns the client connection (unsafe)
	Conn() dcerpc.Conn

	// IPID sets the object interface identifier.
	IPID(context.Context, *dcom.IPID) Client
}
type xxx_DefaultClient struct {
	cc dcerpc.Conn

	remoteUnknown  iremunknown.RemoteUnknownClient
	remoteUnknown2 iremunknown2.RemoteUnknown2Client
}

func (o *xxx_DefaultClient) RemoteUnknown() iremunknown.RemoteUnknownClient {
	return o.remoteUnknown
}

func (o *xxx_DefaultClient) RemoteUnknown2() iremunknown2.RemoteUnknown2Client {
	return o.remoteUnknown2
}

func NewClient(ctx context.Context, cc dcerpc.Conn, opts ...dcerpc.Option) (Client, error) {

	opts = append(opts,
		dcerpc.WithAbstractSyntax(iremunknown.RemoteUnknownSyntaxV0_0),
		dcerpc.WithAbstractSyntax(iremunknown2.RemoteUnknown2SyntaxV0_0),
	)

	cc, err := cc.Bind(ctx, opts...)
	if err != nil {
		return nil, err
	}

	o := &xxx_DefaultClient{cc: cc}

	sub, ok := cc.(dcerpc.SubConn)
	if !ok {
		return nil, fmt.Errorf("sub-conn is not supported")
	}

	remoteUnknownSubConn, err := sub.SubConn(ctx, iremunknown.RemoteUnknownSyntaxV0_0)
	if err != nil {
		// XXX: use main subconnection as a last resort
		// it was noticed that we can reuse the main connection for dcom interfaces
		remoteUnknownSubConn = sub
	}

	o.remoteUnknown, err = iremunknown.NewRemoteUnknownClient(ctx, remoteUnknownSubConn, append(opts, dcerpc.WithNoBind(remoteUnknownSubConn))...)

	remoteUnknown2SubConn, err := sub.SubConn(ctx, iremunknown2.RemoteUnknown2SyntaxV0_0)
	if err != nil {
		// XXX: use main subconnection as a last resort
		// it was noticed that we can reuse the main connection for dcom interfaces
		remoteUnknown2SubConn = sub
	}

	o.remoteUnknown2, err = iremunknown2.NewRemoteUnknown2Client(ctx, remoteUnknown2SubConn, append(opts, dcerpc.WithNoBind(remoteUnknown2SubConn))...)
	return o, nil
}

func (o *xxx_DefaultClient) AlterContext(ctx context.Context, opts ...dcerpc.Option) error {
	return o.cc.AlterContext(ctx, opts...)
}

func (o *xxx_DefaultClient) Conn() dcerpc.Conn {
	return o.cc
}

func (o *xxx_DefaultClient) IPID(ctx context.Context, ipid *dcom.IPID) Client {
	if ipid == nil {
		ipid = &dcom.IPID{}
	}
	return &xxx_DefaultClient{
		remoteUnknown:  o.remoteUnknown.IPID(ctx, ipid),
		remoteUnknown2: o.remoteUnknown2.IPID(ctx, ipid),
		cc:             o.cc,
	}
}