/*
 * Copyright 2017 Scality
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @authors:
 *    Guillaume Gimenez <ggim@scality.com>
 */
#include "node_nfsc.h"
#include "node_nfsc_lookup3.h"
#include "node_nfsc_fattr3.h"

// (dir, name, callback(err, obj_fh, obj_attr, dir_attr) )
NAN_METHOD(NFS::Client::Lookup3) {
    bool typeError = true;
    if ( info.Length() != 3) {
        Nan::ThrowTypeError("Must be called with 3 parameters");
        return;
    }
    if (!info[0]->IsUint8Array())
        Nan::ThrowTypeError("Parameter 1, dir must be a Buffer");
    else if (!info[1]->IsString())
        Nan::ThrowTypeError("Parameter 2, name must be a string");
    else if (!info[2]->IsFunction())
        Nan::ThrowTypeError("Parameter 3, callback must be a function");
    else
        typeError = false;
    if (typeError)
        return;
    NFS::Client* obj = ObjectWrap::Unwrap<NFS::Client>(info.Holder());
    Nan::Callback *callback = new Nan::Callback(info[2].As<v8::Function>());
    Nan::AsyncQueueWorker(new NFS::Lookup3Worker(obj, info[0], info[1], callback));
}

NFS::Lookup3Worker::Lookup3Worker(NFS::Client *client_,
                                const v8::Local<v8::Value> &parent_fh_,
                                const v8::Local<v8::Value> &name_,
                                Nan::Callback *callback)
    : Procedure3Worker(client_, (xdrproc_t) xdr_LOOKUP3res, callback),
      name(name_)
{
    args.what.dir.data.data_val = node::Buffer::Data(parent_fh_);
    args.what.dir.data.data_len = node::Buffer::Length(parent_fh_);
    args.what.name = *name;
}

void NFS::Lookup3Worker::procSuccess()
{
    v8::Local<v8::Value> obj_attrs;
    v8::Local<v8::Value> dir_attrs;
    if (res.LOOKUP3res_u.resok.obj_attributes.attributes_follow)
        obj_attrs = node_nfsc_fattr3(res.LOOKUP3res_u.resok.obj_attributes
                                     .post_op_attr_u.attributes);
    else
        obj_attrs = Nan::Null();
    if (res.LOOKUP3res_u.resok.dir_attributes.attributes_follow)
        dir_attrs = node_nfsc_fattr3(res.LOOKUP3res_u.resok.dir_attributes
                                     .post_op_attr_u.attributes);
    else
        dir_attrs = Nan::Null();
    v8::Local<v8::Value> argv[] = {
        Nan::Null(),
        Nan::NewBuffer(res.LOOKUP3res_u.resok.object.data.data_val,
        res.LOOKUP3res_u.resok.object.data.data_len).ToLocalChecked(), //obj_fh
        obj_attrs,
        dir_attrs
    };
    //data stolen by node
    res.LOOKUP3res_u.resok.object.data.data_val = NULL;
    callback->Call(sizeof(argv)/sizeof(*argv), argv);
}

void NFS::Lookup3Worker::procFailure()
{
    v8::Local<v8::Value> argv[] = {
        Nan::New(error?error:NFSC_UNKNOWN_ERROR).ToLocalChecked()
    };
    callback->Call(1, argv);
}