/*
 * Copyright (c) 2020-2021, SerenityOS developers
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <AK/String.h>
#include <AK/StringBuilder.h>

namespace Web::CSS {

class Token {
    friend class Parser;
    friend class Tokenizer;

public:
    enum class TokenType {
        Invalid,
        EndOfFile,
        Ident,
        Function,
        AtKeyword,
        Hash,
        String,
        BadString,
        Url,
        BadUrl,
        Delim,
        Number,
        Percentage,
        Dimension,
        Whitespace,
        CDO,
        CDC,
        Colon,
        Semicolon,
        Comma,
        OpenSquare,
        CloseSquare,
        OpenParen,
        CloseParen,
        OpenCurly,
        CloseCurly
    };

    enum class HashType {
        Id,
        Unrestricted,
    };

    enum class NumberType {
        Integer,
        Number,
    };

    bool is_eof() const { return m_type == TokenType::EndOfFile; }
    bool is_whitespace() const { return m_type == TokenType::Whitespace; }
    bool is_cdo() const { return m_type == TokenType::CDO; }
    bool is_cdc() const { return m_type == TokenType::CDC; }
    bool is_at() const { return m_type == TokenType::AtKeyword; }
    bool is_semicolon() const { return m_type == TokenType::Semicolon; }
    bool is_open_curly() const { return m_type == TokenType::OpenCurly; }
    bool is_open_square() const { return m_type == TokenType::OpenSquare; }
    bool is_open_paren() const { return m_type == TokenType::OpenParen; }
    bool is_close_paren() const { return m_type == TokenType::CloseParen; }
    bool is_close_square() const { return m_type == TokenType::CloseSquare; }
    bool is_close_curly() const { return m_type == TokenType::CloseCurly; }
    bool is_function() const { return m_type == TokenType::Function; }
    bool is_colon() const { return m_type == TokenType::Colon; }
    bool is_ident() const { return m_type == TokenType::Ident; }
    bool is_delim() const { return m_type == TokenType::Delim; }
    bool is_comma() const { return m_type == TokenType::Comma; }

    TokenType mirror_variant() const;
    String bracket_string() const;
    String bracket_mirror_string() const;
    String to_string() const;

private:
    TokenType m_type { TokenType::Invalid };

    StringBuilder m_value;
    StringBuilder m_unit;
    HashType m_hash_type { HashType::Unrestricted };
    NumberType m_number_type { NumberType::Integer };
};

}