// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/browser/atom_access_token_store.h"

#include <string>
#include <utility>

#include "atom/browser/atom_browser_context.h"
#include "atom/common/google_api_key.h"
#include "base/environment.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/geolocation_provider.h"

using content::BrowserThread;

namespace atom {

namespace internal {

// Loads access tokens and other necessary data on the UI thread, and
// calls back to the originator on the originating thread.
class TokenLoadingJob : public base::RefCountedThreadSafe<TokenLoadingJob> {
 public:
  explicit TokenLoadingJob(
      const content::AccessTokenStore::LoadAccessTokensCallback& callback)
      : callback_(callback), request_context_getter_(nullptr) {}

  void Run(AtomBrowserContext* browser_context) {
    DCHECK_CURRENTLY_ON(BrowserThread::UI);
    request_context_getter_ = browser_context->GetRequestContext();
    std::unique_ptr<base::Environment> env(base::Environment::Create());
    if (!env->GetVar("GOOGLE_API_KEY", &api_key_))
      api_key_ = GOOGLEAPIS_API_KEY;
    BrowserThread::PostTask(
        BrowserThread::IO, FROM_HERE,
        base::Bind(&TokenLoadingJob::RespondOnIOThread, this));
  }

 private:
  friend class base::RefCountedThreadSafe<TokenLoadingJob>;

  ~TokenLoadingJob() {}

  void RespondOnIOThread() {
    // Equivalent to access_token_map[kGeolocationProviderURL].
    // Somehow base::string16 is causing compilation errors when used in a pair
    // of std::map on Linux, this can work around it.
    content::AccessTokenStore::AccessTokenMap access_token_map;
    std::pair<GURL, base::string16> token_pair;
    token_pair.first = GURL(GOOGLEAPIS_ENDPOINT + api_key_);
    access_token_map.insert(token_pair);

    callback_.Run(access_token_map, request_context_getter_);
  }

  content::AccessTokenStore::LoadAccessTokensCallback callback_;
  net::URLRequestContextGetter* request_context_getter_;
  std::string api_key_;
};

}  // namespace internal

AtomAccessTokenStore::AtomAccessTokenStore() {
  browser_context_ = AtomBrowserContext::From("", false);
  content::GeolocationProvider::GetInstance()->UserDidOptIntoLocationServices();
}

AtomAccessTokenStore::~AtomAccessTokenStore() {
}

void AtomAccessTokenStore::LoadAccessTokens(
    const LoadAccessTokensCallback& callback) {
  scoped_refptr<internal::TokenLoadingJob> job(
      new internal::TokenLoadingJob(callback));
  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                          base::Bind(&AtomAccessTokenStore::RunTokenLoadingJob,
                                     this, base::RetainedRef(job)));
}

void AtomAccessTokenStore::RunTokenLoadingJob(
    scoped_refptr<internal::TokenLoadingJob> job) {
  job->Run(browser_context_.get());
}

void AtomAccessTokenStore::SaveAccessToken(const GURL& server_url,
                                           const base::string16& access_token) {
}

}  // namespace atom