namespace Inspectron.Epson.Templates.Language;

public enum TokenType
{
    // Text content
    Text,

    // Styled text: #style1,style2# text #
    StyleStart,      // #style1,style2#
    StyleEnd,        // trailing #

    // Bindings: {path} or {path:format}
    Binding,

    // Separators
    DashSeparator,   // ---
    EqualsSeparator, // ===
    StarSeparator,   // ***
    TildeSeparator,  // ~~~

    // Directives
    If,              // @if condition
    ElseIf,          // @elseif condition
    Else,            // @else
    End,             // @end
    Foreach,         // @foreach item in collection
    Row,             // @row
    EndRow,          // @endrow
    Column,          // |width| or |width,align|

    // Structural
    NewLine,
    EndOfFile
}

public record struct SourcePosition(int Line, int Column)
{
    public override string ToString() => $"({Line}:{Column})";
}

public record Token(TokenType Type, string Value, SourcePosition Position)
{
    public static Token Eof(int line) => new(TokenType.EndOfFile, string.Empty, new SourcePosition(line, 0));
}