module.exports = grammar({
    name: 'onotone',

    rules: {
        Source: $ => repeat($.Tag),
        Tag: $ => seq(
            optional($.WhiteSpaces),
            $.Id,
            optional($.TagClass), optional($.TagHook),
            optional($.WhiteSpaces),
            optional($.Attributes),
            optional($.WhiteSpaces),
            optional($.Content),
            optional($.WhiteSpaces),
            $.TagEnd
        ),

        Id: $ => /\w+/,

        TagHook: $ => seq($.HookSymbol, $.Id),
        TagClass: $ => seq($.ClassSymbol, $.Id),

        HookSymbol: $ => token("#"),

        ClassSymbol: $ => token(":"),

        LSquareBracket: $ => token("["),
        RSquareBracket: $ => token("]"),

        EqualsTo: $ => "->",

        Attribute: $ => seq($.Id, optional($.WhiteSpaces), $.EqualsTo, optional($.WhiteSpaces), $.Content),
        Attributes: $ => seq($.LSquareBracket,
            repeat1(seq(optional($.WhiteSpaces), $.Attribute, optional($.WhiteSpaces), optional($.Comma))),
            optional($.WhiteSpaces),
            $.RSquareBracket),

        Comma: $ => token(","),


        Content: $ => choice($.Single, $.Double),

        SingleQuote: $ => token("\'"),
        DoubleQuote: $ => token("\""),

        Single: $ => seq($.SingleQuote, $.Text, $.SingleQuote),
        Double: $ => seq($.DoubleQuote, $.Text, $.DoubleQuote), 

        Text: $ => /[^'][^"]+/,

        TagEnd: $ => token("."),

        WhiteSpaces: $ => / +/,

    }
});