/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#include "../../Application/jucer_Headers.h"
#include "jucer_VersionInfo.h"

std::unique_ptr<VersionInfo> VersionInfo::fetchFromUpdateServer (const String& versionString)
{
    return fetch ("tags/" + versionString);
}

std::unique_ptr<VersionInfo> VersionInfo::fetchLatestFromUpdateServer()
{
    return fetch ("latest");
}

std::unique_ptr<InputStream> VersionInfo::createInputStreamForAsset (const Asset& asset, int& statusCode)
{
    URL downloadUrl (asset.url);
    StringPairArray responseHeaders;

    return std::unique_ptr<InputStream> (downloadUrl.createInputStream (false, nullptr, nullptr,
                                                                        "Accept: application/octet-stream",
                                                                        0, &responseHeaders, &statusCode, 1));
}

bool VersionInfo::isNewerVersionThanCurrent()
{
    jassert (versionString.isNotEmpty());

    auto currentTokens = StringArray::fromTokens (ProjectInfo::versionString, ".", {});
    auto thisTokens    = StringArray::fromTokens (versionString, ".", {});

    jassert (thisTokens.size() == 3 && thisTokens.size() == 3);

    if (currentTokens[0].getIntValue() == thisTokens[0].getIntValue())
    {
        if (currentTokens[1].getIntValue() == thisTokens[1].getIntValue())
            return currentTokens[2].getIntValue() < thisTokens[2].getIntValue();

        return currentTokens[1].getIntValue() < thisTokens[1].getIntValue();
    }

    return currentTokens[0].getIntValue() < thisTokens[0].getIntValue();
}

std::unique_ptr<VersionInfo> VersionInfo::fetch (const String& endpoint)
{
    URL latestVersionURL ("https://api.github.com/repos/WeAreROLI/JUCE/releases/" + endpoint);
    std::unique_ptr<InputStream> inStream (latestVersionURL.createInputStream (false));

    if (inStream == nullptr)
        return nullptr;

    auto content = inStream->readEntireStreamAsString();
    auto latestReleaseDetails = JSON::parse (content);

    auto* json = latestReleaseDetails.getDynamicObject();

    if (json == nullptr)
        return nullptr;

    auto versionString = json->getProperty ("tag_name").toString();

    if (versionString.isEmpty())
        return nullptr;

    auto* assets = json->getProperty ("assets").getArray();

    if (assets == nullptr)
        return nullptr;

    auto releaseNotes = json->getProperty ("body").toString();
    std::vector<VersionInfo::Asset> parsedAssets;

    for (auto& asset : *assets)
    {
        if (auto* assetJson = asset.getDynamicObject())
        {
            parsedAssets.push_back ({ assetJson->getProperty ("name").toString(),
                                      assetJson->getProperty ("url").toString() });
            jassert (parsedAssets.back().name.isNotEmpty());
            jassert (parsedAssets.back().url.isNotEmpty());
        }
        else
        {
            jassertfalse;
        }
    }

    return std::unique_ptr<VersionInfo> (new VersionInfo ({ versionString, releaseNotes, std::move (parsedAssets) }));
}