#include "gdal_field_defn.hpp"
#include "gdal_common.hpp"
#include "utils/field_types.hpp"

namespace node_gdal {

Nan::Persistent<FunctionTemplate> FieldDefn::constructor;

void FieldDefn::Initialize(Local<Object> target) {
  Nan::HandleScope scope;

  Local<FunctionTemplate> lcons = Nan::New<FunctionTemplate>(FieldDefn::New);
  lcons->InstanceTemplate()->SetInternalFieldCount(1);
  lcons->SetClassName(Nan::New("FieldDefn").ToLocalChecked());

  ATTR(lcons, "name", nameGetter, nameSetter);
  ATTR(lcons, "type", typeGetter, typeSetter);
  ATTR(lcons, "justification", justificationGetter, justificationSetter);
  ATTR(lcons, "width", widthGetter, widthSetter);
  ATTR(lcons, "precision", precisionGetter, precisionSetter);
  ATTR(lcons, "ignored", ignoredGetter, ignoredSetter);

  Nan::Set(target, Nan::New("FieldDefn").ToLocalChecked(), Nan::GetFunction(lcons).ToLocalChecked());

  constructor.Reset(lcons);
}

FieldDefn::FieldDefn(OGRFieldDefn *def) : Nan::ObjectWrap(), this_(def), owned_(false) {
  LOG("Created FieldDefn [%p]", def);
}

FieldDefn::FieldDefn() : Nan::ObjectWrap(), this_(0), owned_(false) {
}

FieldDefn::~FieldDefn() {
  if (this_) {
    LOG("Disposing FieldDefn [%p] (%s)", this_, owned_ ? "owned" : "unowned");
    if (owned_) delete this_;
    LOG("Disposed FieldDefn [%p]", this_);
    this_ = NULL;
  }
}

/**
 * @constructor
 * @class gdal.FieldDefn
 * @param {String} name Field name
 * @param {String} type Data type (see {{#crossLink "Constants (OFT)"}}OFT
 * constants{{/crossLink}})
 */
NAN_METHOD(FieldDefn::New) {
  Nan::HandleScope scope;

  if (!info.IsConstructCall()) {
    Nan::ThrowError("Cannot call constructor as function, you need to use 'new' keyword");
    return;
  }

  if (info[0]->IsExternal()) {
    Local<External> ext = info[0].As<External>();
    void *ptr = ext->Value();
    FieldDefn *f = static_cast<FieldDefn *>(ptr);
    f->Wrap(info.This());
    info.GetReturnValue().Set(info.This());
    return;
  } else {
    std::string field_name("");
    std::string type_name("string");

    NODE_ARG_STR(0, "field name", field_name);
    NODE_ARG_STR(1, "field type", type_name);

    int field_type = getFieldTypeByName(type_name);
    if (field_type < 0) {
      Nan::ThrowError("Unrecognized field type");
      return;
    }

    FieldDefn *def = new FieldDefn(new OGRFieldDefn(field_name.c_str(), static_cast<OGRFieldType>(field_type)));
    def->owned_ = true;
    def->Wrap(info.This());
  }

  info.GetReturnValue().Set(info.This());
}

Local<Value> FieldDefn::New(OGRFieldDefn *def) {
  Nan::EscapableHandleScope scope;
  return scope.Escape(FieldDefn::New(def, false));
}

Local<Value> FieldDefn::New(OGRFieldDefn *def, bool owned) {
  Nan::EscapableHandleScope scope;

  if (!def) { return scope.Escape(Nan::Null()); }

  // make a copy of fielddefn owned by a featuredefn
  // + no need to track when a featuredefn is destroyed
  // + no need to throw errors when a method trys to modify an owned read-only
  // fielddefn
  // - is slower

  if (!owned) { def = new OGRFieldDefn(def); }

  FieldDefn *wrapped = new FieldDefn(def);
  wrapped->owned_ = true;

  v8::Local<v8::Value> ext = Nan::New<External>(wrapped);
  v8::Local<v8::Object> obj =
    Nan::NewInstance(Nan::GetFunction(Nan::New(FieldDefn::constructor)).ToLocalChecked(), 1, &ext).ToLocalChecked();

  return scope.Escape(obj);
}

NAN_METHOD(FieldDefn::toString) {
  Nan::HandleScope scope;
  info.GetReturnValue().Set(Nan::New("FieldDefn").ToLocalChecked());
}

/**
 * @attribute name
 * @type {String}
 */
NAN_GETTER(FieldDefn::nameGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  info.GetReturnValue().Set(SafeString::New(def->this_->GetNameRef()));
}

/**
 * Data type (see {{#crossLink "Constants (OFT)"}}OFT constants{{/crossLink}})
 *
 * @attribute type
 * @type {String}
 */
NAN_GETTER(FieldDefn::typeGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  info.GetReturnValue().Set(SafeString::New(getFieldTypeName(def->this_->GetType())));
}

/**
 * @attribute ignored
 * @type {Boolean}
 */
NAN_GETTER(FieldDefn::ignoredGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  info.GetReturnValue().Set(Nan::New<Boolean>(def->this_->IsIgnored()));
}

/**
 * Field justification (see {{#crossLink "Constants (OJ)"}}OJ
 * constants{{/crossLink}})
 *
 * @attribute justification
 * @type {String}
 */
NAN_GETTER(FieldDefn::justificationGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  OGRJustification justification = def->this_->GetJustify();
  if (justification == OJRight) {
    info.GetReturnValue().Set(Nan::New("Right").ToLocalChecked());
    return;
  }
  if (justification == OJLeft) {
    info.GetReturnValue().Set(Nan::New("Left").ToLocalChecked());
    return;
  }
  info.GetReturnValue().Set(Nan::Undefined());
}

/**
 * @attribute width
 * @type {Integer}
 */
NAN_GETTER(FieldDefn::widthGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  info.GetReturnValue().Set(Nan::New<Integer>(def->this_->GetWidth()));
}

/**
 * @attribute precision
 * @type {Integer}
 */
NAN_GETTER(FieldDefn::precisionGetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  info.GetReturnValue().Set(Nan::New<Integer>(def->this_->GetPrecision()));
}

NAN_SETTER(FieldDefn::nameSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  if (!value->IsString()) {
    Nan::ThrowError("Name must be string");
    return;
  }
  std::string name = *Nan::Utf8String(value);
  def->this_->SetName(name.c_str());
}

NAN_SETTER(FieldDefn::typeSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  if (!value->IsString()) {
    Nan::ThrowError("type must be a string");
    return;
  }
  std::string name = *Nan::Utf8String(value);
  int type = getFieldTypeByName(name.c_str());
  if (type < 0) {
    Nan::ThrowError("Unrecognized field type");
  } else {
    def->this_->SetType(OGRFieldType(type));
  }
}

NAN_SETTER(FieldDefn::justificationSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());

  OGRJustification justification;
  std::string str = *Nan::Utf8String(value);
  if (value->IsString()) {
    if (str == "Left") {
      justification = OJLeft;
    } else if (str == "Right") {
      justification = OJRight;
    } else if (str == "Undefined") {
      justification = OJUndefined;
    } else {
      Nan::ThrowError("Unrecognized justification");
      return;
    }
  } else if (value->IsNull() || value->IsUndefined()) {
    justification = OJUndefined;
  } else {
    Nan::ThrowError("justification must be a string or undefined");
    return;
  }

  def->this_->SetJustify(justification);
}

NAN_SETTER(FieldDefn::widthSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  if (!value->IsInt32()) {
    Nan::ThrowError("width must be an integer");
    return;
  }
  def->this_->SetWidth(Nan::To<int64_t>(value).ToChecked());
}

NAN_SETTER(FieldDefn::precisionSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  if (!value->IsInt32()) {
    Nan::ThrowError("precision must be an integer");
    return;
  }
  def->this_->SetPrecision(Nan::To<int64_t>(value).ToChecked());
}

NAN_SETTER(FieldDefn::ignoredSetter) {
  Nan::HandleScope scope;
  FieldDefn *def = Nan::ObjectWrap::Unwrap<FieldDefn>(info.This());
  if (!value->IsBoolean()) {
    Nan::ThrowError("ignored must be a boolean");
    return;
  }
  def->this_->SetIgnored(Nan::To<int64_t>(value).ToChecked());
}

} // namespace node_gdal