using System.IO;
using CloudPrint.Client.Models;
using CloudPrint.Client.Services.Abstractions;

namespace CloudPrint.Client.Services;

public sealed class FileAppLogger : IAppLogger
{
    private readonly object _syncRoot = new();

    public FileAppLogger()
    {
        var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
        LogDirectory = Path.Combine(appData, "CloudPrint.Client", "logs");
    }

    public string LogDirectory { get; }

    public void Write(AppLogEntry entry)
    {
        ArgumentNullException.ThrowIfNull(entry);
        Directory.CreateDirectory(LogDirectory);

        var logPath = Path.Combine(LogDirectory, $"cloudprint-{DateTime.Now:yyyyMMdd}.log");
        lock (_syncRoot)
        {
            File.AppendAllText(logPath, Format(entry) + Environment.NewLine);
        }
    }

    private static string Format(AppLogEntry entry)
    {
        var exceptionText = string.IsNullOrWhiteSpace(entry.ExceptionText)
            ? string.Empty
            : $" | Exception={entry.ExceptionText}";
        return $"{entry.Timestamp:yyyy-MM-dd HH:mm:ss.fff} [{entry.LevelText}] {entry.Message}{exceptionText}";
    }
}