/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */

using BinarySerialization;
using System;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Text.Json;
using UVtools.Core.Extensions;

namespace UVtools.Core;

/// <summary>
/// A helper class with utilities
/// </summary>
public static class Helpers
{
    /// <summary>
    /// Gets the <see cref="BinarySerializer"/> instance
    /// </summary>
    public static BinarySerializer Serializer { get; } = new() {Endianness = Endianness.Little };

    public static MemoryStream Serialize(object value)
    {
        MemoryStream stream = new();
        Serializer.Serialize(stream, value);
        return stream;
    }

    public static T Deserialize<T>(Stream stream)
    {
        return Serializer.Deserialize<T>(stream);
    }

    public static uint SerializeWriteFileStream(FileStream fs, object value, int offset = 0)
    {
        using var stream = Serialize(value);
        return fs.WriteStream(stream, offset);
    }

    public static bool SetPropertyValue(PropertyInfo attribute, object obj, string value)
    {
        var name = attribute.PropertyType.Name.ToLower();
        switch (name)
        {
            case "string":
                attribute.SetValue(obj, value.Convert<string>());
                return true;
            case "boolean":
                if(char.IsDigit(value[0])) attribute.SetValue(obj, !value.Equals("0"));
                else attribute.SetValue(obj, value.Equals("True", StringComparison.InvariantCultureIgnoreCase));
                return true;
            case "byte":
                if (value.Equals("true", StringComparison.InvariantCultureIgnoreCase)) attribute.SetValue(obj, (byte)1);
                else if (value.Equals("false", StringComparison.InvariantCultureIgnoreCase)) attribute.SetValue(obj, byte.MinValue);
                else attribute.SetValue(obj, value.Convert<byte>());
                return true;
            case "sbyte":
                attribute.SetValue(obj, value.Convert<sbyte>());
                return true;
            case "uint16":
                attribute.SetValue(obj, value.Convert<ushort>());
                return true;
            case "int16":
                attribute.SetValue(obj, value.Convert<short>());
                return true;
            case "uint32":
                attribute.SetValue(obj, value.Convert<uint>());
                return true;
            case "int32":
                attribute.SetValue(obj, value.Convert<int>());
                return true;
            case "uint64":
                attribute.SetValue(obj, value.Convert<ulong>());
                return true;
            case "int64":
                attribute.SetValue(obj, value.Convert<long>());
                return true;
            case "single":
                attribute.SetValue(obj, (float)Math.Round(float.Parse(value, CultureInfo.InvariantCulture.NumberFormat), 3));
                return true;
            case "double":
                attribute.SetValue(obj, Math.Round(double.Parse(value, CultureInfo.InvariantCulture.NumberFormat), 3));
                return true;
            case "decimal":
                attribute.SetValue(obj, Math.Round(decimal.Parse(value, CultureInfo.InvariantCulture.NumberFormat), 3));
                return true;
            default:
                throw new Exception($"Data type '{name}' not recognized, contact developer.");
        }
    }

    public static int GetPixelPosition(int width, int x, int y)
    {
        return width * y + x;
    }

    public static void SwapVariables<T>(ref T var1, ref T var2)
    {
        (var1, var2) = (var2, var1);
    }

    public static float BrightnessToPercent(byte brightness, byte roundPlates = 2) => (float)Math.Round(brightness * 100 / 255f, roundPlates);
}