using Microsoft.Iris.Asm.Models;
using Sprache;
using System.Linq;

namespace Microsoft.Iris.Asm;

public static partial class Lexer
{
    public static readonly Parser<string> AlphanumericText = Parse.LetterOrDigit.AtLeastOnce().Text();

    public static readonly Parser<string> WordText = Parse.Letter.AtLeastOnce().Text();

    public static readonly Parser<string> WholeNumber = Parse.Digit.AtLeastOnce().Text();

    public static readonly Parser<string> Uri = Parse.LetterOrDigit.Or(Parse.Chars(":/!._-")).AtLeastOnce().Text();

    public static readonly Parser<string> StatementEnd = Parse.Char(';').Return(";").Or(Parse.LineTerminator);

    public static readonly Parser<IImport> Import = ParseImport;

    public static readonly Parser<IDirective> Directive = ParseDirective;

    public static readonly Parser<IBodyItem> BodyItem = ParseBodyItem;

    public static readonly Parser<Program> Program =
        from directives in Directive.Many()
        from body in BodyItem.Many()
        select new Program(directives, body);

    private static IInput ConsumeWhitespace(IInput input) => Parse.WhiteSpace.Many()(input).Remainder;
}