// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include <string>

#include "atom/common/native_mate_converters/callback.h"
#include "atom/common/native_mate_converters/file_path_converter.h"
#include "atom/common/native_mate_converters/gurl_converter.h"
#include "atom/common/native_mate_converters/string16_converter.h"
#include "atom/common/node_includes.h"
#include "atom/common/platform_util.h"
#include "native_mate/dictionary.h"

#if defined(OS_WIN)
#include "base/win/scoped_com_initializer.h"
#include "base/win/shortcut.h"

namespace mate {

template<>
struct Converter<base::win::ShortcutOperation> {
  static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val,
                     base::win::ShortcutOperation* out) {
    std::string operation;
    if (!ConvertFromV8(isolate, val, & operation))
      return false;
    if (operation.empty() || operation == "create")
      *out = base::win::SHORTCUT_CREATE_ALWAYS;
    else if (operation == "update")
      *out = base::win::SHORTCUT_UPDATE_EXISTING;
    else if (operation == "replace")
      *out = base::win::SHORTCUT_REPLACE_EXISTING;
    else
      return false;
    return true;
  }
};

}  // namespace mate
#endif

namespace {

void OnOpenExternalFinished(
    v8::Isolate* isolate,
    const base::Callback<void(v8::Local<v8::Value>)>& callback,
    const std::string& error) {
  if (error.empty())
    callback.Run(v8::Null(isolate));
  else
    callback.Run(v8::String::NewFromUtf8(isolate, error.c_str()));
}

bool OpenExternal(
#if defined(OS_WIN)
    const base::string16& url,
#else
    const GURL& url,
#endif
    mate::Arguments* args) {
  bool activate = true;
  if (args->Length() >= 2) {
    mate::Dictionary options;
    if (args->GetNext(&options)) {
      options.Get("activate", &activate);
    }
  }

  if (args->Length() >= 3) {
    base::Callback<void(v8::Local<v8::Value>)> callback;
    if (args->GetNext(&callback)) {
      platform_util::OpenExternal(
          url, activate,
          base::Bind(&OnOpenExternalFinished, args->isolate(), callback));
      return true;
    }
  }

  return platform_util::OpenExternal(url, activate);
}

#if defined(OS_WIN)
bool WriteShortcutLink(const base::FilePath& shortcut_path,
                       mate::Arguments* args) {
  base::win::ShortcutOperation operation = base::win::SHORTCUT_CREATE_ALWAYS;
  args->GetNext(&operation);
  mate::Dictionary options = mate::Dictionary::CreateEmpty(args->isolate());
  if (!args->GetNext(&options)) {
    args->ThrowError();
    return false;
  }

  base::win::ShortcutProperties properties;
  base::FilePath path;
  base::string16 str;
  int index;
  if (options.Get("target", &path))
    properties.set_target(path);
  if (options.Get("cwd", &path))
    properties.set_working_dir(path);
  if (options.Get("args", &str))
    properties.set_arguments(str);
  if (options.Get("description", &str))
    properties.set_description(str);
  if (options.Get("icon", &path) && options.Get("iconIndex", &index))
    properties.set_icon(path, index);
  if (options.Get("appUserModelId", &str))
    properties.set_app_id(str);

  base::win::ScopedCOMInitializer com_initializer;
  return base::win::CreateOrUpdateShortcutLink(
      shortcut_path, properties, operation);
}

v8::Local<v8::Value> ReadShortcutLink(mate::Arguments* args,
                                      const base::FilePath& path) {
  using base::win::ShortcutProperties;
  mate::Dictionary options = mate::Dictionary::CreateEmpty(args->isolate());
  base::win::ScopedCOMInitializer com_initializer;
  base::win::ShortcutProperties properties;
  if (!base::win::ResolveShortcutProperties(
          path, ShortcutProperties::PROPERTIES_ALL, &properties)) {
    args->ThrowError("Failed to read shortcut link");
    return v8::Null(args->isolate());
  }
  options.Set("target", properties.target);
  options.Set("cwd", properties.working_dir);
  options.Set("args", properties.arguments);
  options.Set("description", properties.description);
  options.Set("icon", properties.icon);
  options.Set("iconIndex", properties.icon_index);
  options.Set("appUserModelId", properties.app_id);
  return options.GetHandle();
}
#endif

void Initialize(v8::Local<v8::Object> exports, v8::Local<v8::Value> unused,
                v8::Local<v8::Context> context, void* priv) {
  mate::Dictionary dict(context->GetIsolate(), exports);
  dict.SetMethod("showItemInFolder", &platform_util::ShowItemInFolder);
  dict.SetMethod("openItem", &platform_util::OpenItem);
  dict.SetMethod("openExternal", &OpenExternal);
  dict.SetMethod("moveItemToTrash", &platform_util::MoveItemToTrash);
  dict.SetMethod("beep", &platform_util::Beep);
#if defined(OS_WIN)
  dict.SetMethod("writeShortcutLink", &WriteShortcutLink);
  dict.SetMethod("readShortcutLink", &ReadShortcutLink);
#endif
}

}  // namespace

NODE_MODULE_CONTEXT_AWARE_BUILTIN(atom_common_shell, Initialize)
