using System.Text.Json;

using System.Text.Json.Nodes;

using JsonBenchmark;

namespace JsonNodeBenchmark;

public static class JsonNodeBenchmark

{

private static readonly JsonSerializerOptions _options = new() { WriteIndented = false };

// Benchmark for JSON via Web URL

public static async Task<int> MakeReportAsync(string url)

{

// Make network call

var httpClient = new HttpClient();

using var responseMessage = await httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);

var stream = await responseMessage.Content.ReadAsStreamAsync();

// Parse Json from stream

var doc = await JsonNode.ParseAsync(stream) ?? throw new Exception(Error.BADJSON);

var version = doc["channel-version"]?.ToString() ?? "";

var supported = doc["support-phase"]?.ToString() is "active" or "maintenance";

var eolDate = doc["eol-date"]?.ToString() ?? "";

var releases = doc["releases"]?.AsArray() ?? [];

// Generate report

var report = new JsonObject()

{

["report-date"] = DateTime.Now.ToShortDateString(),

["versions"] = new JsonArray()

{

new JsonObject()

{

["version"] = version,

["supported"] = supported,

["eol-date"] = eolDate,

["support-ends-in-days"] = eolDate is null ? null : GetDaysAgo(eolDate, true),

["releases"] = GetReportForReleases(releases),

}

}

};

// Generate report

string reportJson = report.ToJsonString(_options);

WriteJsonToConsole(reportJson);

return reportJson.Length;

}

// Benchmark for JSON via file

public static async Task<int> MakeReportFileAsync(string path)

{

// Local local file

using Stream stream = File.Open(path, FileMode.Open);

// Parse Json from stream

var doc = await JsonNode.ParseAsync(stream) ?? throw new Exception(Error.BADJSON);

var version = doc["channel-version"]?.ToString() ?? "";

var supported = doc["support-phase"]?.ToString() is "active" or "maintenance";

var eolDate = doc["eol-date"]?.ToString() ?? "";

var releases = doc["releases"]?.AsArray() ?? [];

// Generate report

var report = new JsonObject()

{

["report-date"] = DateTime.Now.ToShortDateString(),

["versions"] = new JsonArray()

{

new JsonObject()

{

["version"] = version,

["supported"] = supported,

["eol-date"] = eolDate,

["support-ends-in-days"] = eolDate is null ? null : GetDaysAgo(eolDate, true),

["releases"] = GetReportForReleases(releases),

}

}

};

// Generate JSON

string reportJson = report.ToJsonString(_options);

WriteJsonToConsole(reportJson);

return reportJson.Length;

}

// Get first and first security release

static JsonArray GetReportForReleases(JsonArray releases)

{

var securityOnly = false;

JsonArray reportReleases = [];

foreach (var release in releases)

{

if (release is null)

{

continue;

}

var releaseDate = release["release-date"]?.ToString() ?? "";

var releaseVersion = release["release-version"]?.ToString() ?? "";

var securityNode = release["security"] ?? new JsonObject();

var security = securityNode.GetValueKind() switch

{

JsonValueKind.True => true,

JsonValueKind.False => false,

_ => throw new Exception(Error.BADJSON)

};

if (securityOnly && !security)

{

continue;

}

else if (!securityOnly)

{

securityOnly = true;

}

var cves = release["cve-list"] ?? throw new Exception(Error.BADJSON);

var releaseObject = new JsonObject()

{

["release-version"] = releaseVersion,

["security"] = security,

["release-date"] = releaseDate,

["released-days-ago"] = GetDaysAgo(releaseDate, true),

["cve-list"] = cves.DeepClone()

};

reportReleases.Add(releaseObject);

if (security)

{

break;

}

}

return reportReleases;

}

static int GetDaysAgo(string date, bool positiveNumber = false)

{

bool success = DateTime.TryParse(date, out var day);

var daysAgo = success ? (int)(day - DateTime.Now).TotalDays : 0;

return positiveNumber ? Math.Abs(daysAgo) : daysAgo;

}

static void WriteJsonToConsole(string json)

{

#if DEBUG

Console.WriteLine(json);

Console.WriteLine();

#endif

}

}