#pragma once

namespace xrpl::detail {

template <class ValueType>
ReadViewFwdRange<ValueType>::Iterator::Iterator(Iterator const& other)
    : view_(other.view_), impl_(other.impl_ ? other.impl_->copy() : nullptr), cache_(other.cache_)
{
}

template <class ValueType>
ReadViewFwdRange<ValueType>::Iterator::Iterator(Iterator&& other) noexcept
    : view_(other.view_), impl_(std::move(other.impl_)), cache_(std::move(other.cache_))
{
}

template <class ValueType>
ReadViewFwdRange<ValueType>::Iterator::Iterator(
    ReadView const* view,
    std::unique_ptr<iter_base> impl)
    : view_(view), impl_(std::move(impl))
{
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator=(Iterator const& other) -> Iterator&
{
    if (this != &other)
    {
        view_ = other.view_;
        impl_ = other.impl_ ? other.impl_->copy() : nullptr;
        cache_ = other.cache_;
    }
    return *this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator=(Iterator&& other) noexcept -> Iterator&
{
    if (this != &other)
    {
        view_ = other.view_;
        impl_ = std::move(other.impl_);
        cache_ = std::move(other.cache_);
    }

    return *this;
}

template <class ValueType>
bool
ReadViewFwdRange<ValueType>::Iterator::operator==(Iterator const& other) const
{
    XRPL_ASSERT(
        view_ == other.view_,
        "xrpl::detail::ReadViewFwdRange::iterator::operator==(iterator) "
        "const : input view match");

    if (impl_ != nullptr && other.impl_ != nullptr)
        return impl_->equal(*other.impl_);

    return impl_ == other.impl_;
}

template <class ValueType>
bool
ReadViewFwdRange<ValueType>::Iterator::operator!=(Iterator const& other) const
{
    return !(*this == other);
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator*() const -> reference
{
    if (!cache_)
        cache_ = impl_->dereference();
    return *cache_;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator->() const -> pointer
{
    return &**this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator++() -> Iterator&
{
    impl_->increment();
    cache_.reset();
    return *this;
}

template <class ValueType>
auto
ReadViewFwdRange<ValueType>::Iterator::operator++(int) -> Iterator
{
    Iterator prev(view_, impl_->copy());
    prev.cache_ = std::move(cache_);
    ++(*this);
    return prev;
}

}  // namespace xrpl::detail