using System;

namespace PluginManager.Online.Helpers;

public class VersionString
{
    private bool Equals(VersionString other)
    {
        return PackageCheckVersion == other.PackageCheckVersion && PackageMainVersion == other.PackageMainVersion && PackageVersionID == other.PackageVersionID;
    }

    public override bool Equals(object? obj)
    {
        if (ReferenceEquals(null, obj)) return false;
        if (ReferenceEquals(this, obj)) return true;
        if (obj.GetType() != this.GetType()) return false;
        return Equals((VersionString)obj);
    }

    public override int GetHashCode()
    {
        return HashCode.Combine(PackageCheckVersion, PackageMainVersion, PackageVersionID);
    }

    public int PackageCheckVersion;
    public int PackageMainVersion;
    public int PackageVersionID;

    public VersionString(string version)
    {
        var data = version.Split('.');
        try
        {
            if (data.Length == 3)
            {
                PackageVersionID = int.Parse(data[0]);
                PackageMainVersion = int.Parse(data[1]);
                PackageCheckVersion = int.Parse(data[2]);
            }
            else if (data.Length == 4)
            {
                // ignore the first item data[0]
                PackageVersionID = int.Parse(data[1]);
                PackageMainVersion = int.Parse(data[2]);
                PackageCheckVersion = int.Parse(data[3]);
            }
            else 
                throw new Exception("Invalid version string");

        }
        catch (Exception ex)
        {
            Console.WriteLine(version);
            throw new Exception("Failed to write Version", ex);
        }
    }

    public override string ToString()
    {
        return "{PackageID: " + PackageVersionID + ", PackageVersion: " + PackageMainVersion +
               ", PackageCheckVersion: " + PackageCheckVersion + "}";
    }

    public string ToShortString()
    {
        if (PackageVersionID == 0 && PackageCheckVersion == 0 && PackageMainVersion == 0)
            return "Unknown";
        return $"{PackageVersionID}.{PackageMainVersion}.{PackageCheckVersion}";
    }


    #region operators

    public static bool operator >(VersionString s1, VersionString s2)
    {
        if (s1.PackageVersionID > s2.PackageVersionID) return true;
        if (s1.PackageVersionID == s2.PackageVersionID)
        {
            if (s1.PackageMainVersion > s2.PackageMainVersion) return true;
            if (s1.PackageMainVersion == s2.PackageMainVersion &&
                s1.PackageCheckVersion > s2.PackageCheckVersion) return true;
        }

        return false;
    }

    public static bool operator <(VersionString s1, VersionString s2)
    {
        return !(s1 > s2) && s1 != s2;
    }

    public static bool operator ==(VersionString s1, VersionString s2)
    {
        if (s1.PackageVersionID == s2.PackageVersionID && s1.PackageMainVersion == s2.PackageMainVersion &&
            s1.PackageCheckVersion == s2.PackageCheckVersion) return true;
        return false;
    }

    public static bool operator !=(VersionString s1, VersionString s2)
    {
        return !(s1 == s2);
    }

    public static bool operator <=(VersionString s1, VersionString s2)
    {
        return s1 < s2 || s1 == s2;
    }

    public static bool operator >=(VersionString s1, VersionString s2)
    {
        return s1 > s2 || s1 == s2;
    }

    #endregion
}