using System.Text.RegularExpressions;
using Comal.Classes;
using InABox.Core;
using InABox.Database;

namespace PRS.Shared;

/// <summary>
/// Trigger the calculation of Digital Form Numbers
/// </summary>
/// <returns>true (always)</returns>
public class Update_7_19 : DatabaseUpdateScript
{
    public override VersionNumber Version => new VersionNumber(7, 19);

    public override bool Update()
    {
        // Find all classes that derive from EntityForm
        var formtypes = CoreUtils.TypeList(
            new[]
            {
                typeof(Setout).Assembly
            },
            myType =>
                myType is { IsClass: true, IsAbstract: false, IsGenericType: false } 
                && myType.IsSubclassOf(typeof(Entity)) 
                && myType.GetInterfaces().Contains(typeof(IEntityForm))
        ).ToArray();
            
        foreach (var formtype in formtypes)
        {
            var columns = Columns.None(formtype).Add("ID").Add("Number");
            var forms = DbFactory.NewProvider(Logger.Main).Query(formtype, null, columns);
            var nullforms = forms.Rows
                .Where(r => String.IsNullOrWhiteSpace(r.Get<String>("Number")))
                .Select(r=>r.ToObject(formtype))
                .OfType<Entity>()
                .ToArray();

            if (!nullforms.Any()) 
                continue;

            var maxvalue = forms.Rows.Select(r => Regex.Match(r.Get<String>("Number") ?? "", @"(?<=-)\d+")?.Value ?? "0")
                .MaxBy(x => x) ?? "0";
            int.TryParse(maxvalue, out int iNumber);

            String prefix = null;
            String format = null; 
            foreach (var form in nullforms)
            {
                prefix ??= (form as IStringAutoIncrement)?.AutoIncrementPrefix() ?? "";
                format ??= (form as IStringAutoIncrement)?.AutoIncrementFormat() ?? "{0:D8}";
                iNumber++;
                CoreUtils.SetPropertyValue(form, "Number", prefix+String.Format(format, iNumber));
            }

            DbFactory.NewProvider(Logger.Main).Save(formtype, nullforms);

        }
        return true;
    }
    
    
}