using System;
using System.Diagnostics;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

if (!OperatingSystem.IsWindows())
	throw new PlatformNotSupportedException("This example requires Windows.");
if (args.Length != 1)
	throw new ArgumentException("Usage: StarBondingLauncher ACCOUNT_ID");

string executable = @"C:\Program Files\StarBonding\starbonding-cli.exe";
string account = args[0];
string password = ReadPassword();
string stopName = @"Local\StarBonding.OEM." + Guid.NewGuid().ToString("N");

using EventWaitHandle stopEvent = new(false, EventResetMode.ManualReset,
	stopName);

var start = new ProcessStartInfo {
	FileName = executable,
	UseShellExecute = false,
	RedirectStandardInput = true,
	RedirectStandardOutput = true,
	RedirectStandardError = true,
	CreateNoWindow = true
};
start.ArgumentList.Add("--username");
start.ArgumentList.Add(account);
start.ArgumentList.Add("--password-stdin");
start.ArgumentList.Add("--stop-event");
start.ArgumentList.Add(stopName);

using var process = Process.Start(start) ??
	throw new InvalidOperationException("Unable to start StarBonding CLI.");

await process.StandardInput.WriteLineAsync(password);
process.StandardInput.Close();
password = string.Empty;

Console.CancelKeyPress += (_, eventArgs) => {
	eventArgs.Cancel = true;
	stopEvent.Set();
};

bool publisherStarted = false;
Task stdoutTask = Task.Run(async () => {
	while (await process.StandardOutput.ReadLineAsync() is { } line) {
		Console.WriteLine(line);
		if (!publisherStarted && line.StartsWith("EVENT READY ",
			StringComparison.Ordinal)) {
			publisherStarted = true;
			Console.WriteLine("StarBonding is ready. Start the RTMP publisher.");
			// Start your publisher once here. Publish to:
			// rtmp://127.0.0.1:1935/live/your-stream-key
		}
	}
});

Task stderrTask = Task.Run(async () => {
	while (await process.StandardError.ReadLineAsync() is { } line)
		Console.Error.WriteLine(line);
});

await process.WaitForExitAsync();
await Task.WhenAll(stdoutTask, stderrTask);

if (process.ExitCode != 0)
	throw new InvalidOperationException(
		$"StarBonding exited with code {process.ExitCode}.");

static string ReadPassword()
{
	var password = new StringBuilder();
	for (;;) {
		ConsoleKeyInfo key = Console.ReadKey(intercept: true);
		if (key.Key == ConsoleKey.Enter) {
			Console.WriteLine();
			return password.ToString();
		}
		if (key.Key == ConsoleKey.Backspace) {
			if (password.Length != 0)
				password.Length--;
			continue;
		}
		if (!char.IsControl(key.KeyChar))
			password.Append(key.KeyChar);
	}
}