#pragma once

#include <XCEngine/UI/DrawData.h>

#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>

namespace XCEngine::UI::Editor::Widgets {

inline constexpr std::size_t UIEditorMenuBarInvalidIndex =
    static_cast<std::size_t>(-1);

struct UIEditorMenuBarItem {
    std::string menuId = {};
    std::string label = {};
    bool enabled = true;
    float desiredLabelWidth = 0.0f;
};

struct UIEditorMenuBarState {
    std::size_t openIndex = UIEditorMenuBarInvalidIndex;
    std::size_t hoveredIndex = UIEditorMenuBarInvalidIndex;
    bool focused = false;
};

struct UIEditorMenuBarMetrics {
    float barHeight = 24.0f;
    float horizontalInset = 0.0f;
    float verticalInset = 2.0f;
    float buttonGap = 1.0f;
    float buttonPaddingX = 4.0f;
    float labelFontSize = 13.0f;
    float estimatedGlyphWidth = 6.5f;
    float labelInsetY = -1.5f;
    float barCornerRounding = 0.0f;
    float buttonCornerRounding = 0.75f;
    float baseBorderThickness = 1.0f;
    float focusedBorderThickness = 1.0f;
    float openBorderThickness = 1.0f;
};

struct UIEditorMenuBarPalette {
    ::XCEngine::UI::UIColor barColor =
        ::XCEngine::UI::UIColor(1.0f, 1.0f, 1.0f, 1.0f);
    ::XCEngine::UI::UIColor buttonColor =
        ::XCEngine::UI::UIColor(0.0f, 0.0f, 0.0f, 0.0f);
    ::XCEngine::UI::UIColor buttonHoveredColor =
        ::XCEngine::UI::UIColor(0.88f, 0.88f, 0.88f, 1.0f);
    ::XCEngine::UI::UIColor buttonOpenColor =
        ::XCEngine::UI::UIColor(0.84f, 0.84f, 0.84f, 1.0f);
    ::XCEngine::UI::UIColor borderColor =
        ::XCEngine::UI::UIColor(0.0f, 0.0f, 0.0f, 0.0f);
    ::XCEngine::UI::UIColor focusedBorderColor =
        ::XCEngine::UI::UIColor(0.0f, 0.0f, 0.0f, 0.0f);
    ::XCEngine::UI::UIColor openBorderColor =
        ::XCEngine::UI::UIColor(0.0f, 0.0f, 0.0f, 0.0f);
    ::XCEngine::UI::UIColor textPrimary =
        ::XCEngine::UI::UIColor(0.08f, 0.08f, 0.08f, 1.0f);
    ::XCEngine::UI::UIColor textMuted =
        ::XCEngine::UI::UIColor(0.28f, 0.28f, 0.28f, 1.0f);
    ::XCEngine::UI::UIColor textDisabled =
        ::XCEngine::UI::UIColor(0.50f, 0.50f, 0.50f, 1.0f);
};

struct UIEditorMenuBarLayout {
    ::XCEngine::UI::UIRect bounds = {};
    ::XCEngine::UI::UIRect contentRect = {};
    std::vector<::XCEngine::UI::UIRect> buttonRects = {};
};

enum class UIEditorMenuBarHitTargetKind : std::uint8_t {
    None = 0,
    BarBackground,
    Button
};

struct UIEditorMenuBarHitTarget {
    UIEditorMenuBarHitTargetKind kind = UIEditorMenuBarHitTargetKind::None;
    std::size_t index = UIEditorMenuBarInvalidIndex;
};

float ResolveUIEditorMenuBarDesiredButtonWidth(
    const UIEditorMenuBarItem& item,
    const UIEditorMenuBarMetrics& metrics = {});

UIEditorMenuBarLayout BuildUIEditorMenuBarLayout(
    const ::XCEngine::UI::UIRect& bounds,
    const std::vector<UIEditorMenuBarItem>& items,
    const UIEditorMenuBarMetrics& metrics = {});

UIEditorMenuBarHitTarget HitTestUIEditorMenuBar(
    const UIEditorMenuBarLayout& layout,
    const ::XCEngine::UI::UIPoint& point);

void AppendUIEditorMenuBarBackground(
    ::XCEngine::UI::UIDrawList& drawList,
    const UIEditorMenuBarLayout& layout,
    const std::vector<UIEditorMenuBarItem>& items,
    const UIEditorMenuBarState& state,
    const UIEditorMenuBarPalette& palette = {},
    const UIEditorMenuBarMetrics& metrics = {});

void AppendUIEditorMenuBarForeground(
    ::XCEngine::UI::UIDrawList& drawList,
    const UIEditorMenuBarLayout& layout,
    const std::vector<UIEditorMenuBarItem>& items,
    const UIEditorMenuBarState& state,
    const UIEditorMenuBarPalette& palette = {},
    const UIEditorMenuBarMetrics& metrics = {});

void AppendUIEditorMenuBar(
    ::XCEngine::UI::UIDrawList& drawList,
    const ::XCEngine::UI::UIRect& bounds,
    const std::vector<UIEditorMenuBarItem>& items,
    const UIEditorMenuBarState& state,
    const UIEditorMenuBarPalette& palette = {},
    const UIEditorMenuBarMetrics& metrics = {});

} // namespace XCEngine::UI::Editor::Widgets