/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef FUD_STRING_VIEW_HPP
#define FUD_STRING_VIEW_HPP

#include "fud_status.hpp"
#include "fud_utf8.hpp"

namespace fud {

class String;

class StringView {
  public:
    constexpr StringView() noexcept = default;
    constexpr StringView(const StringView& rhs) noexcept = default;
    constexpr StringView(StringView&& rhs) noexcept = default;
    constexpr ~StringView() noexcept = default;
    constexpr StringView& operator=(const StringView& rhs) = default;
    constexpr StringView& operator=(StringView&& rhs) = default;

    constexpr StringView(size_t strLen, const utf8* strData) : m_length(strLen), m_data{strData}
    {
    }

    StringView(size_t strLen, const char* strData) :
        m_length(strLen),                              // line break
        m_data{reinterpret_cast<const utf8*>(strData)} // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
    {
    }

    explicit StringView(const String& fudString) noexcept;

    [[nodiscard]] constexpr size_t length() const
    {
        return m_length;
    }

    [[nodiscard]] constexpr const utf8* data() const
    {
        return m_data;
    }

    [[nodiscard]] bool nullTerminated() const;

    [[nodiscard]] bool utf8Valid() const;

    Result<size_t, FudStatus> skipWhitespace();

    Result<size_t, FudStatus> trimWhitespace();

    FudStatus toUint8(uint8_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toUint16(uint16_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toUint32(uint32_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toUint64(uint64_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toInt8(int8_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toInt16(int16_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toInt32(int32_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toInt64(int64_t& number, uint8_t specifiedRadix, size_t& strLen) const;

    FudStatus toFloat(float& number, size_t& strLen) const;

    FudStatus toDouble(double& number, size_t& strLen) const;

  private:
    size_t m_length{0};
    const utf8* m_data{nullptr};
};

FudStatus skipWhitespace(StringView& view, size_t& skipIndex);

ssize_t cStringLength(const char* str);

ssize_t cStringLength(const char* str, size_t maxLength);

} // namespace fud

#endif