/***
* ==++==
*
* Copyright (c) Microsoft Corporation. All rights reserved. 
* 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.
*
* ==--==
* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
*
* MainPage.xaml.cpp - Implementation of the MainPage and 
*  FacebookAlbum classes.
* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
****/

#include "pch.h"
#include <collection.h>
#include "MainPage.xaml.h"
#include "Facebook.h"

using namespace FacebookDemo;

using namespace Platform;
using namespace Platform::Collections;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;

MainPage::MainPage()
{
	InitializeComponent();
}

/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.  The Parameter
/// property is typically used to configure the page.</param>
void MainPage::OnNavigatedTo(NavigationEventArgs^ e)
{
	(void) e;	// Unused parameter
}

void MainPage::LoginButton_Click_1(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
	LoginButton->IsEnabled = false; // Disable button to prevent double-login

	facebook_client::instance().login(L"user_photos")
	.then([=](){
		AlbumButton->IsEnabled = true;
	}, pplx::task_continuation_context::use_current());
}


void MainPage::AlbumButton_Click_1(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
{
	using namespace pplx;
	AlbumButton->IsEnabled = false;

	facebook_client::instance().get(L"/me/albums")
	.then([](web::json::value v){
        web::json::object& obj = v.as_object();
        std::vector<FacebookAlbum^> albums;

        for(auto& elem : obj[L"data"].as_array()){
            albums.push_back(ref new FacebookAlbum(
            	elem[L"name"].as_string(),
            	elem[L"count"].as_integer(),
            	elem[L"id"].as_string(),
            	elem[L"cover_photo"].as_string()
            ));
        }

		return task_from_result(std::move(albums));
	}).then([=](std::vector<FacebookAlbum^> albums){
		AlbumGrid->ItemsSource = ref new Vector<FacebookAlbum^>(std::move(albums));
	}, task_continuation_context::use_current());
}

String^ FacebookAlbum::Title::get()
{
	return ref new String(title_.c_str());
}

int FacebookAlbum::Count::get()
{
	return count_;
}

ImageSource^ FacebookAlbum::Preview::get()
{
	if(preview_ == nullptr) {
		auto preview_uri = facebook_client::instance().base_uri(true);

		preview_uri.append_path(photo_id_);
		preview_uri.append_path(L"/picture");

		preview_ = ref new Imaging::BitmapImage(ref new Uri(StringReference(preview_uri.to_string().c_str())));
	}

	return preview_;
}