//
// Created by Matty on 2022-01-28.
//

#pragma once

#include "imgui.h"

typedef int ImGuiNeoSequencerFlags;
typedef int ImGuiNeoSequencerCol;
typedef int ImGuiNeoTimelineFlags;

// Flags for ImGui::BeginNeoSequencer()
enum ImGuiNeoSequencerFlags_ {
	ImGuiNeoSequencerFlags_None = 0,
	ImGuiNeoSequencerFlags_AllowLengthChanging = 1 << 0,
	ImGuiNeoSequencerFlags_AllowSelection = 1 << 1,
	ImGuiNeoSequencerFlags_HideZoom = 1 << 2,
	ImGuiNeoSequencerFlags_ZoomBottomOverlay = 1 << 3,
};

// Flags for ImGui::BeginNeoTimeline()
enum ImGuiNeoTimelineFlags_ {
	ImGuiNeoTimelineFlags_None = 0,
	ImGuiNeoTimelineFlags_AllowFrameChanging = 1 << 0,
	ImGuiNeoTimelineFlags_Group = 1 << 1,
};

enum ImGuiNeoSequencerCol_ {
	ImGuiNeoSequencerCol_Bg,
	ImGuiNeoSequencerCol_TopBarBg,
	ImGuiNeoSequencerCol_SelectedTimeline,
	ImGuiNeoSequencerCol_TimelineBorder,
	ImGuiNeoSequencerCol_TimelinesBg,
	ImGuiNeoSequencerCol_FramePointer,
	ImGuiNeoSequencerCol_FramePointerHovered,
	ImGuiNeoSequencerCol_FramePointerPressed,
	ImGuiNeoSequencerCol_Keyframe,
	ImGuiNeoSequencerCol_KeyframeHovered,
	ImGuiNeoSequencerCol_KeyframePressed,
	ImGuiNeoSequencerCol_FramePointerLine,

	ImGuiNeoSequencerCol_ZoomBarBg,
	ImGuiNeoSequencerCol_ZoomBarSlider,
	ImGuiNeoSequencerCol_ZoomBarSliderHovered,
	ImGuiNeoSequencerCol_ZoomBarSliderEnds,
	ImGuiNeoSequencerCol_ZoomBarSliderEndsHovered,
	ImGuiNeoSequencerCol_COUNT
};

struct ImGuiNeoSequencerStyle {
	float SequencerRounding = 2.5f;	  // Corner rounding around whole sequencer
	float TopBarHeight = 0.0f;		  // Value <= 0.0f = Height is calculated by FontSize + FramePadding.y * 2.0f
	bool TopBarShowFrameLines = true; // Show line for every frame in top bar
	bool TopBarShowFrameTexts = true; // Show frame number every 10th frame
	ImVec2 ItemSpacing = {4.0f, 0.5f};
	float DepthItemSpacing = 10.0f; // Amount of text offset per depth level in timeline values
	float TopBarSpacing = 3.0f;		// Space between top bar and timeline
	float TimelineBorderSize = 1.0f;
	float CurrentFramePointerSize = 7.0f; // Size of pointing arrow above current frame line
	float CurrentFrameLineWidth = 1.0f;	  // Width of line showing current frame over timeline
	float ZoomHeightScale = 1.0f;		  // Scale of Zoom bar, base height is font size

	ImVec4 Colors[ImGuiNeoSequencerCol_COUNT];

	ImGuiNeoSequencerStyle();
};

namespace ImGui {

IMGUI_API const ImVec4 &GetStyleNeoSequencerColorVec4(ImGuiNeoSequencerCol idx);
IMGUI_API ImGuiNeoSequencerStyle &GetNeoSequencerStyle();

IMGUI_API void PushNeoSequencerStyleColor(ImGuiNeoSequencerCol idx, ImU32 col);
IMGUI_API void PushNeoSequencerStyleColor(ImGuiNeoSequencerCol idx, const ImVec4 &col);
IMGUI_API void PopNeoSequencerStyleColor(int count = 1);

IMGUI_API bool BeginNeoSequencer(const char *id, uint32_t *frame, uint32_t *startFrame, uint32_t *endFrame,
								 const ImVec2 &size = ImVec2(0, 0),
								 ImGuiNeoSequencerFlags flags = ImGuiNeoSequencerFlags_None);
// Call only when BeginNeoSequencer() returns true!!
IMGUI_API void EndNeoSequencer();

IMGUI_API bool BeginNeoGroup(const char *label, bool *open = nullptr);
IMGUI_API void EndNeoGroup();

IMGUI_API bool BeginNeoTimeline(const char *label, uint32_t **keyframes, uint32_t keyframeCount, bool *open = nullptr,
								ImGuiNeoTimelineFlags flags = ImGuiNeoTimelineFlags_None);
// Call only when BeginNeoTimeline() returns true!!
IMGUI_API void EndNeoTimeLine();

IMGUI_API bool NeoBeginCreateKeyframe(uint32_t *frame);

} // namespace ImGui