using Serilog;
using System.Text.Json.Serialization;
// Defines a Package


sealed class Package
{

    public string PackageName { get; private set; }
    public Version Version { get; private set; }
    public int Size { get; private set; }
    public string SHA256 { get; private set; }
    public string Filename { get; private set; }

    [JsonConstructor] // NOTE: without this it would be impossible to deserialise a Package
    private Package(string PackageName, Version Version, int Size, string SHA256, string Filename)
    {
        this.PackageName = PackageName;
        this.Version = Version;
        this.Size = Size;
        this.SHA256 = SHA256;
        this.Filename = Filename;
    }

    public Package(string packageString)
    {
        Log.Information("Creating package from string");
        Log.Debug("PackageString : \n{str}", packageString);
        // we assume the user is passing only one package.
        string[] packageLines = packageString.Split('\n');
        Log.Debug("Split result : \n{@spl}", packageLines);
        PackageName = packageLines
            .Where(line => line.Contains("Package:"))
            .First()
            .Split(": ")
            .Last();
        Version = new Version(packageLines
            .Where(line => line.Contains("Version:"))
            .First()
            .Split(": ")
            .Last());
        Size = int.Parse(
                packageLines
                .Where(line => line.Contains("Size:"))
                .First()
                .Split(": ")
                .Last());
        SHA256 = packageLines
            .Where(line => line.Contains("SHA256:"))
            .First()
            .Split(": ")
            .Last();
        Filename = packageLines
            .Where(line => line.Contains("Filename:"))
            .First()
            .Split(": ")
            .Last();
    }

}

/* TODO: capture dependencies and create method to find them.
	- This would probably need distro specific lookup tables.
	- Also would ideally need code to shell out (at root level)
	  to perform installs...
*/