// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/ash/file_manager/url_util.h"

#include <stddef.h>

#include <memory>
#include <utility>

#include "base/json/json_writer.h"
#include "base/strings/escape.h"
#include "base/values.h"
#include "chrome/browser/ash/file_manager/fileapi_util.h"

namespace file_manager {
namespace util {
namespace {

const char kAllowedPaths[] = "allowedPaths";
const char kNativePath[] = "nativePath";
const char kAnyPath[] = "anyPath";
const char kAnyPathOrUrl[] = "anyPathOrUrl";

// Converts a numeric dialog type to a string.
std::string GetDialogTypeAsString(ui::SelectFileDialog::Type dialog_type) {
  std::string type_str;
  switch (dialog_type) {
    case ui::SelectFileDialog::SELECT_NONE:
      type_str = "full-page";
      break;

    case ui::SelectFileDialog::SELECT_FOLDER:
    case ui::SelectFileDialog::SELECT_EXISTING_FOLDER:
      type_str = "folder";
      break;

    case ui::SelectFileDialog::SELECT_UPLOAD_FOLDER:
      type_str = "upload-folder";
      break;

    case ui::SelectFileDialog::SELECT_SAVEAS_FILE:
      type_str = "saveas-file";
      break;

    case ui::SelectFileDialog::SELECT_OPEN_FILE:
      type_str = "open-file";
      break;

    case ui::SelectFileDialog::SELECT_OPEN_MULTI_FILE:
      type_str = "open-multi-file";
      break;
  }

  return type_str;
}

}  // namespace

GURL GetFileManagerMainPageUrl() {
  return GetFileManagerURL().Resolve("");
}

GURL GetFileManagerMainPageUrlWithParams(
    ui::SelectFileDialog::Type type,
    const std::u16string& title,
    const GURL& current_directory_url,
    const GURL& selection_url,
    const std::string& target_name,
    const ui::SelectFileDialog::FileTypeInfo* file_types,
    int file_type_index,
    const std::string& search_query,
    bool show_android_picker_apps,
    std::vector<std::string> volume_filter) {
  base::DictValue arg_value;
  arg_value.Set("type", GetDialogTypeAsString(type));
  arg_value.Set("title", title);
  arg_value.Set("currentDirectoryURL", current_directory_url.spec());
  arg_value.Set("selectionURL", selection_url.spec());
  // |targetName| is only relevant for SaveAs.
  if (type == ui::SelectFileDialog::Type::SELECT_SAVEAS_FILE) {
    arg_value.Set("targetName", target_name);
  }
  arg_value.Set("searchQuery", search_query);
  arg_value.Set("showAndroidPickerApps", show_android_picker_apps);

  if (file_types) {
    base::ListValue types_list;
    for (size_t i = 0; i < file_types->extensions.size(); ++i) {
      base::ListValue extensions_list;
      for (size_t j = 0; j < file_types->extensions[i].size(); ++j) {
        extensions_list.Append(file_types->extensions[i][j]);
      }

      base::DictValue dict;
      dict.Set("extensions", std::move(extensions_list));

      if (i < file_types->extension_description_overrides.size()) {
        std::u16string desc = file_types->extension_description_overrides[i];
        dict.Set("description", desc);
      }

      // file_type_index is 1-based. 0 means no selection at all.
      dict.Set("selected", static_cast<size_t>(file_type_index) == (i + 1));

      types_list.Append(std::move(dict));
    }
    arg_value.Set("typeList", std::move(types_list));

    arg_value.Set("includeAllFiles", file_types->include_all_files);
  }

  if (file_types) {
    switch (file_types->allowed_paths) {
      case ui::SelectFileDialog::FileTypeInfo::NATIVE_PATH:
        arg_value.Set(kAllowedPaths, kNativePath);
        break;
      case ui::SelectFileDialog::FileTypeInfo::ANY_PATH:
        arg_value.Set(kAllowedPaths, kAnyPath);
        break;
      case ui::SelectFileDialog::FileTypeInfo::ANY_PATH_OR_URL:
        arg_value.Set(kAllowedPaths, kAnyPathOrUrl);
        break;
    }
  } else {
    arg_value.Set(kAllowedPaths, kNativePath);
  }

  if (!volume_filter.empty()) {
    base::ListValue volume_filter_list;
    for (const auto& item : volume_filter) {
      volume_filter_list.Append(item);
    }
    arg_value.Set("volumeFilter", std::move(volume_filter_list));
  }

  std::string json_args = base::WriteJson(arg_value).value_or("");

  std::string url =
      GetFileManagerMainPageUrl().spec() + '?' +
      base::EscapeUrlEncodedData(json_args,
                                 false);  // Space to %20 instead of +.
  return GURL(url);
}

}  // namespace util
}  // namespace file_manager