using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Generator
{
    public partial class CodeWriter
    {
        private void Enums()
        {
            foreach ( var o in def.enums )
            {
                WriteLine( $"//" );
                WriteLine( $"// {o.Name}" );
                WriteLine( $"//" );
                var name = o.Name;

                // We're not interested in namespacing
                if ( name.Contains( "::" ) )
                    name = o.Name.Substring( o.Name.LastIndexOf( ":" ) + 1 );

                // Skip the E
                if ( name[0] == 'E' )
                    name = name.Substring( 1 );

                StartBlock( $"internal enum {name} : int" );
                {
                    //
                    // If all the enum values start with the same 
                    // string, remove it. This converts
                    // "k_EUserHasLicenseResultHasLicense" to "HasLicense" etc
                    //
                    int iFinished = int.MaxValue;
                    for ( int i = 0; i < 4096; i++ )
                    {
                        var c = o.Values.First().Name[i];
                        foreach ( var entry in o.Values )
                        {
                            if ( entry.Name[i] != c )
                            {
                                iFinished = i;
                                break;
                            }
                        }

                        if ( iFinished != int.MaxValue )
                            break;
                    }

                    foreach ( var entry in o.Values )
                    {
                        var ename = entry.Name;

                        if ( iFinished != int.MaxValue )
                            ename = ename.Substring( iFinished );

                        //
                        // Names aren't allowed to start with a number
                        // So just stick the enum name on the front
                        //
                        if ( char.IsNumber( ename[0] ) )
                            ename = name + ename;

                        WriteLine( $"{ename} = {entry.Value}," );
                    }
                }
                EndBlock();
                WriteLine();
            }
        }
    }
}