#pragma once
#include "compat/prelude.hpp"
#include <Corrade/Containers/StringView.h>
#include <Magnum/Magnum.h>
#include <imgui.h>
#include <imgui_internal.h>

namespace floormat::imgui {

struct raii_wrapper final
{
    using F = void(*)(void);
    raii_wrapper(F fn);
    raii_wrapper() = default;
    ~raii_wrapper();
    raii_wrapper(const raii_wrapper&) = delete;
    raii_wrapper& operator=(const raii_wrapper&) = delete;
    raii_wrapper& operator=(raii_wrapper&&) noexcept;
    raii_wrapper(raii_wrapper&& other) noexcept;
    explicit operator bool() const noexcept;

private:
    F dtor = nullptr;
};

[[nodiscard]] raii_wrapper begin_window(StringView name = {}, bool* p_open = nullptr, ImGuiWindowFlags flags = ImGuiWindowFlags_None);
[[nodiscard]] raii_wrapper begin_child(StringView name, const ImVec2& size, int flags = ImGuiChildFlags_None, int window_flags = ImGuiWindowFlags_None);
[[nodiscard]] raii_wrapper begin_main_menu();
[[nodiscard]] raii_wrapper begin_menu(StringView name, bool enabled = true);
[[nodiscard]] raii_wrapper begin_list_box(StringView name, ImVec2 size = {});
[[nodiscard]] raii_wrapper begin_table(StringView id, int ncols, ImGuiTableFlags flags = 0, const ImVec2& outer_size = {}, float inner_width = 0);
[[nodiscard]] raii_wrapper tree_node(StringView name, ImGuiTreeNodeFlags flags = ImGuiTreeNodeFlags_None);
[[nodiscard]] raii_wrapper begin_disabled(bool is_disabled = true);
[[nodiscard]] raii_wrapper begin_combo(StringView name, StringView preview, ImGuiComboFlags flags = 0);
[[nodiscard]] raii_wrapper begin_popup(StringView name, ImGuiWindowFlags flags = 0);

[[nodiscard]] raii_wrapper push_style_var(ImGuiStyleVar_ var, Vector2 value);
[[nodiscard]] raii_wrapper push_style_var(ImGuiStyleVar_ var, float value);
[[nodiscard]] raii_wrapper push_style_color(ImGuiCol_ var, const Color4& value);
[[nodiscard]] raii_wrapper push_id(StringView str);

void text(StringView str, ImGuiTextFlags flags = ImGuiTextFlags_NoWidthForLargeClippedText);

struct style_saver final
{
    style_saver();
    ~style_saver();
private:
    ImGuiStyle style;
};

struct font_saver final
{
    font_saver(float size);
    ~font_saver();

private:
    float font_size, font_base_size;
};

struct draw_list_font_saver final
{
    draw_list_font_saver(float size);
    ~draw_list_font_saver();

private:
    float font_size;
};

namespace detail { const char* label_left_(StringView, char*, size_t, float); }

template<std::size_t N>
const char* label_left(StringView label, char(&buf)[N], float width)
{
    return detail::label_left_(label, static_cast<char*>(buf), N, width);
}

} // namespace floormat::imgui