#include "Present_Surface_Lease.h"

namespace renderive {

Present_Surface_Lease::Present_Surface_Lease() = default;

Present_Surface_Lease::Present_Surface_Lease(Present_Surface_Lease&& other) noexcept {
    move_from(std::move(other));
}

Present_Surface_Lease& Present_Surface_Lease::operator=(Present_Surface_Lease&& other) noexcept {
    if (this == &other)
        return *this;
    reset();
    move_from(std::move(other));
    return *this;
}

Present_Surface_Lease::~Present_Surface_Lease() {
    reset();
}

Present_Surface_Lease::operator bool() const {
    return output() != nullptr;
}

bool Present_Surface_Lease::new_frame() const {
    return is_new_frame;
}

bool Present_Surface_Lease::request_was_pending() const {
    return update_was_pending;
}

Image_View Present_Surface_Lease::image() const {
    Render_Output* current = output();
    if (!current)
        return {};
    return current->image.view();
}

Present_Surface_Lease Present_Surface_Lease::empty(bool is_new_frame, bool update_was_pending) {
    Present_Surface_Lease lease;
    lease.is_new_frame = is_new_frame;
    lease.update_was_pending = update_was_pending;
    return lease;
}

Render_Output* Present_Surface_Lease::output() const {
    return output_ ? output_(&storage_) : nullptr;
}

void Present_Surface_Lease::reset() {
    if (destroy_)
        destroy_(&storage_);
    output_ = nullptr;
    destroy_ = nullptr;
    move_ = nullptr;
    is_new_frame = false;
    update_was_pending = false;
}

void Present_Surface_Lease::move_from(Present_Surface_Lease&& other) noexcept {
    if (!other.move_) {
        is_new_frame = other.is_new_frame;
        update_was_pending = other.update_was_pending;
        other.is_new_frame = false;
        other.update_was_pending = false;
        return;
    }
    other.move_(&storage_, &other.storage_);
    output_ = other.output_;
    destroy_ = other.destroy_;
    move_ = other.move_;
    is_new_frame = other.is_new_frame;
    update_was_pending = other.update_was_pending;
    other.output_ = nullptr;
    other.destroy_ = nullptr;
    other.move_ = nullptr;
    other.is_new_frame = false;
    other.update_was_pending = false;
}

} // namespace renderive