package main

/*
	Rules of matrices:
	1) Order matters when multiplying with vectors
	- m * v = Column vector x matrix
	- v * m = Row vector x matrix

	2) Odin matrices are column-major for math efficiency
	fmt.println(matrix[3, 3]f32 {
		a, -b, 0,
		b, a, 0,
		0, 0, 1,
	})
	>> [0.8660254, 0.5, 0, -0.5, 0.8660254, 0, 0, 0, 1]

	Additionally this means that the first index of a matrix is the column.
	mat[<column>, <row>].
	If you had an array of 9 floats ([9]f32) and you accessed the first one
	It'd be the same as accessing the first colmun of a matrix.
	array[1] = mat[1, 0]

	3) Matrix multiplication order matters
	// scale first then translate
	transformation_a := translation * scale
	// translate first then scale
	transformation_b := scale * translation
*/

import rl "libraries/raylib"
import ui "libraries/snths_ui"
import "core:mem"
import "core:fmt"
import "core:math/linalg"
import "core:strings"
import "core:slice"

RAYGUI_ICON_NEW :: "#009#"
RAYGUI_ICON_SAVE :: "#002#"
RAYGUI_ICON_SAVE_AS :: "#001#"
RAYGUI_ICON_LOAD :: "#006#"
RAYGUI_ICON_IDENTITY_MATRIX :: "#000#"
RAYGUI_ICON_TRANSLATION_MATRIX :: "#068#"
RAYGUI_ICON_SCALE_MATRIX :: "#070#"
RAYGUI_ICON_ROTATION_MATRIX :: "#211#"
RAYGUI_ICON_SKEW_MATRIX :: "#192#"
RAYGUI_ICON_PLAY :: "#131#"
RAYGUI_ICON_PAUSE :: "#132#"
RAYGUI_ICON_RESET :: "#211#"
RAYGUI_ICON_TRASH :: "#143#"
RAYGUI_ICON_DOWN :: "#120#"
RAYGUI_ICON_UP :: "#121#"

TRANSFORMATION_RECTANGLE_COLOR_ORIGIN :: rl.RED
TRANSFORMATION_RECTANGLE_COLOR_MIDDLE :: rl.MAGENTA
TRANSFORMATION_RECTANGLE_COLOR_NEXT :: rl.GRAY
TRANSFORMATION_RECTANGLE_COLOR_LAST :: rl.BLUE

@rodata default_project_load_location := "default"
@rodata font_data := #load("assets/fonts/cmuntb.ttf")

UiContainerType :: enum {
	Normal,
	Matrix,
	Scroll,
}

UiElementData_Container :: struct {
	type: UiContainerType,
	thickness: f32,
	scroll: f32,
	matrix_index: int,
}

UiElementData_Slider :: struct {
	min, max: f32,
	value:    ^f32,
}

UiElementData_FloatInput :: struct {
	value: ^f32,
	value_string: cstring,
	tag: bit_set[enum{UpdateMatrix}],
}

UiElementData_TextInput :: struct {
	str: cstring,
}

UiElementData_ToggleGroup :: struct {
	value: ^i32,
}

UiButtonType :: enum {
	Nothing,
	ProjectSave,
	ProjectSaveAs,
	ProjectLoad,
	ProjectNew,
	ProjectSaveConfirm,
	ProjectLoadConfirm,
	DismissError,
	AddIdentity,
	AddTranslation,
	AddScale,
	AddRotation,
	AddSkewMatrix,
	AddTranslationMatrixConfirm,
	AddScaleMatrixConfirm,
	AddRotationMatrixConfirm,
	AddSkewMatrixConfirm,
	ExitDialog,
	StartTransformation,
	PauseTransformation,
	ResumeTransformation,
	ResetTransformation,
	ResetGrid,
	MatrixDelete,
	MatrixMoveUp,
	MatrixMoveDown,
	CenterView,
}

UiButtonRecalculateFinishGroup :: bit_set[UiButtonType]{
	.AddIdentity,
	.AddTranslationMatrixConfirm,
	.AddScaleMatrixConfirm,
	.AddRotationMatrixConfirm,
	.MatrixDelete,
	.MatrixMoveUp,
	.MatrixMoveDown,
}

UiElementData_Button :: struct {
	type: UiButtonType,
	target_matrix: int,
	options: cstring,
}

UI_ALLOWED_FOCUS :: bit_set[ui.ElementType]{.InputFloat}

HotkeyTypes :: enum {
	AddIdentity,
	AddTranslation,
	AddScale,
	AddRotation,
	ZoomXOnly,
	ZoomYOnly,
}

@rodata hotkey_without_modifier := [HotkeyTypes]rl.KeyboardKey {
	.AddIdentity = .I,
	.AddTranslation = .T,
	.AddScale = .S,
	.AddRotation = .R,
	.ZoomXOnly = .X,
	.ZoomYOnly = .Y,
}

HotkeyWithModifier :: enum {
	ProjectSave,
	ProjectLoad,
}

@rodata hotkey_with_modifier := [HotkeyWithModifier]rl.KeyboardKey {
	.ProjectSave = .S,
	.ProjectLoad = .O,
}

FontStyle :: struct {
	font: rl.Font,
	size, spacing: f32
}

ProgramState :: enum {
	Normal,
	Dialog,
}

MouseState :: enum {
	Hover,
	DraggingGrid,
	DraggingDraggable,
	HoverMatrices,
}

ProgramDialogType :: enum {
	CreateTranslationMatrix,
	CreateScaleMatrix,
	CreateRotationMatrix,
	CreateSkewMatrix,
	SaveProject,
	LoadProject,
	Error,
}

@rodata program_dialog_messages := [ProgramDialogType]cstring {
	.CreateTranslationMatrix = "Create tranlation matrix",
	.CreateScaleMatrix = "Create scale matrix",
	.CreateRotationMatrix = "Create rotation matrix",
	.CreateSkewMatrix = "Create skew matrix",
	.SaveProject = "Save project",
	.LoadProject = "Load project",
	.Error = "Error",
}

ProgramMessageType :: enum {
	ChangeMatrixTypeClearData,
}

@rodata program_messages := [ProgramMessageType]cstring {
	.ChangeMatrixTypeClearData = "Changing the matrix type will delete all current matrices.\nAre you sure you want to do this?",
}

program: Program

InputFloatField :: [32]byte
MATRIX_POOL_SIZE :: 4096

DIALOG_STATE_INPUT_FIELD_COUNT :: 16
DIALOG_STATE_TEXT_INPUT_FIELD_SIZE :: 256
DIALOG_STATE_TEXT_INPUT_FIELD_COUNT :: 8
ProgramData_DialogState :: struct {
	input_float_value_strings: [DIALOG_STATE_INPUT_FIELD_COUNT]InputFloatField,
	input_float_values: [DIALOG_STATE_INPUT_FIELD_COUNT]f32,
	input_text_buffers: [DIALOG_STATE_TEXT_INPUT_FIELD_SIZE][DIALOG_STATE_TEXT_INPUT_FIELD_COUNT]byte,
}

ProgramAnimationState :: enum {
	Ready,
	Playing,
	Paused,
}

MouseDraggableType :: enum {
	Point,
	RectangleCorner,
	Rectangle,
}

MouseDraggable_Point :: struct {
	ref: ^v2,
}

MouseDraggable_RectangleCornerData :: struct {
	corner: RectangleCornersCorner,
	corners_ref: ^RectangleCorners,
	corner_ref: ^v2,
}

MouseDraggable_RectangleData :: struct {
	corners: ^RectangleCorners,
}

MouseDraggable :: union {
	MouseDraggable_Point,
	MouseDraggable_RectangleCornerData,
	MouseDraggable_RectangleData,
}

RotationMode :: enum {
	Degrees,
	Radians,
}

Program :: struct {
	ui_context: ui.Context,
	ui_element_focus: ui.ElementId,
	ui_overlay_context: ui.Context,
	ui_overlay_element_focus: ui.ElementId,
	ui_overlay_queue_focus_first: bool,
	ui_tooltip_offset: v2,
	matrix_float_pool: []f32,
	matrix_value_string_pool: []InputFloatField,
	matrix_create_dropdown_value: HotkeyTypes,
	matrix_count: int,
	matrix_scroll: f32,
	matrix_scroll_speed: f32,
	mouse_state: MouseState,
	mouse_draggables: [dynamic; 64]MouseDraggable,
	mouse_current_draggable: MouseDraggable,
	mouse_draggable_radius: f32,
	project_save_string: [DIALOG_STATE_TEXT_INPUT_FIELD_COUNT]byte,
	rotation_mode: RotationMode,
	grid: Grid,
	grid_zoom_x_only: bool,
	grid_zoom_y_only: bool,
	grid_zoom_speed: f32,
	font_style: FontStyle,
	state: ProgramState,
	message_type: ProgramMessageType,
	dialog_type: ProgramDialogType,
	dialog_data: ProgramData_DialogState,
	dialog_message: cstring,
	animation: Animation,
	animation_state: ProgramAnimationState,
	animation_speed: f32,
	window_should_close: bool,
}

float_slice_get_mat3 :: proc(floats: []f32, index: int) -> ^mat3 {
	return cast(^mat3)(&floats[index * 9])
}

matrix_pool_max :: proc() -> int {
	return len(program.matrix_float_pool) / 9
}

matrix_pool_get_mat3 :: proc() -> (value_strings: []InputFloatField, values: []f32) {
	assert(program.matrix_count + 1 < matrix_pool_max(), "Max matrix count exceeded")
	value_strings = program.matrix_value_string_pool[program.matrix_count * 9 : program.matrix_count * 9 + 9]
	values = program.matrix_float_pool[program.matrix_count * 9 : program.matrix_count * 9 + 9]
	for i in 0..<len(value_strings) {
		mem.set(raw_data(&value_strings[i]), 0, len(InputFloatField))
		value_strings[i][0] = '0'
		values[i] = 0.0
	}
	program.matrix_count += 1
	return value_strings, values
}

matrix_move_to :: proc(floats: []f32, inputs: []InputFloatField, from, to: int) {
	if from == to do return
	floats := program.matrix_float_pool
	inputs := program.matrix_value_string_pool
	floats_values_size := size_of(f32) * 9
	inputs_buffer_size := size_of(InputFloatField) * 9
	floats_moving_matrix := &floats[from * 9]
	inputs_moving_matrix := &inputs[from * 9][0]
	floats_moved_to_matrix := &floats[to * 9]
	inputs_moved_to_matrix := &inputs[to * 9][0]
	floats_temp := [9]f32{}
	inputs_temp := [9]InputFloatField{}
	mem.copy(&floats_temp[0], floats_moving_matrix, floats_values_size)
	mem.copy(&inputs_temp[0][0], inputs_moving_matrix, inputs_buffer_size)
	mem.copy(floats_moving_matrix, floats_moved_to_matrix, floats_values_size)
	mem.copy(inputs_moving_matrix, inputs_moved_to_matrix, inputs_buffer_size)
	mem.copy(floats_moved_to_matrix, &floats_temp[0], floats_values_size)
	mem.copy(inputs_moved_to_matrix, &inputs_temp[0][0], inputs_buffer_size)
}

program_save_project :: proc(program: ^Program, path: string) -> ProjectWriteError {
	project := ProjectData {
		matrix_count = u32(program.matrix_count),
		matrices = program.matrix_float_pool,
		grid = program.grid,
		shapes = program.animation.shapes,
	}
	project_write(&project, path) or_return
	return nil
}

program_save_project_from_project_string_or_open_dialog :: proc(program: ^Program) {
	path := strings.string_from_null_terminated_ptr(&program.project_save_string[0], DIALOG_STATE_TEXT_INPUT_FIELD_SIZE)
	if len(path) > 0 {
		if err := program_save_project(program, path); err != nil {
			msg := fmt.caprint("Failed to save project to '", path, "'\n" ,typeid_of(type_of(err)), ".", err, sep = "")
			program_show_dialog(program, .Error, msg)
		} else {
			program.state = .Normal
		}
	} else {
		program_show_dialog(program, .SaveProject)
	}
}

program_load_project :: proc(program: ^Program, path: string) -> ProjectReadError {
	project: ProjectData
	project.matrices = program.matrix_float_pool
	project_read(&project, path) or_return
	program.matrix_count = int(project.matrix_count)
	program.grid = project.grid
	program.animation.shapes = project.shapes
	matrices := slice.reinterpret([]mat3, program.matrix_float_pool[:program.matrix_count * 9])
	for mat, i in matrices {
		start := i * 9
		end := (i + 1) * 9
		write_matrix_to_values_and_value_strings(program.matrix_float_pool[start:end], program.matrix_value_string_pool[start:end], mat)
	}
	program.animation.matrix_count = program.matrix_count
	return nil
}

program_show_dialog :: proc(program: ^Program, dialog_type: ProgramDialogType, message: cstring = "") {
	program.dialog_data = {}
	program.ui_overlay_queue_focus_first = true
	program.state = .Dialog
	program.dialog_type = dialog_type
	program.dialog_message = message
	mem.set(&program.dialog_data, 0, size_of(program.dialog_data))
	for i in 0..<len(program.dialog_data.input_float_values) {
		program.dialog_data.input_float_values[i] = 0.0
	}
}

program_init :: proc(allocator := context.allocator) {
	program.matrix_float_pool = make(type_of(program.matrix_float_pool), MATRIX_POOL_SIZE)
	program.matrix_value_string_pool = make(type_of(program.matrix_value_string_pool), MATRIX_POOL_SIZE)
	program.matrix_scroll_speed = 32.0

	font := rl.LoadFontFromMemory(".ttf", raw_data(font_data), i32(len(font_data)), 24.0, nil, 0)
	program.font_style = {
		font = font,
		size = 24.0,
		spacing = 2.0
	}
	rl.GuiSetFont(font)
	rl.GuiSetStyle(.DEFAULT, i32(rl.GuiDefaultProperty.TEXT_SIZE), i32(program.font_style.size))
	rl.GuiSetStyle(.DEFAULT, i32(rl.GuiDefaultProperty.TEXT_SPACING), i32(program.font_style.spacing))

	program.grid = {
		cell_size_px = 40.0,
		zoom = 1.0,
		offset = -program_screen_size() / 2.0,
	}
	program.grid_zoom_speed = 1.0
	program.mouse_draggable_radius = 6.0

	ui.init(&program.ui_context, 4000, ui_measure_text, &program.font_style, allocator)
	program.ui_element_focus = ui.element_id_invalid()
	ui.init(&program.ui_overlay_context, 200, ui_measure_text, &program.font_style, allocator)
	program.ui_overlay_element_focus = ui.element_id_invalid()
	program.ui_tooltip_offset = 20.0

	animation_init(&program.animation, program.matrix_float_pool)

	if err := program_load_project(&program, default_project_load_location); err != nil {
		program_show_dialog(&program, .Error, fmt.caprint(typeid_of(type_of(err)), ".", err))
	} else {
		mem.copy(&program.project_save_string[0], raw_data(default_project_load_location), len(default_project_load_location))
	}
}

program_get_master_matrix :: proc() -> mat3 {
	matrices := (cast([^]mat3)raw_data(program.matrix_float_pool))[:program.matrix_count]
	master_matrix := linalg.identity_matrix(mat3)
	#reverse for mat in matrices {
		master_matrix *= mat
	}
	return master_matrix
}

program_set_animation_state :: proc(state: ProgramAnimationState) {
	if program.animation_state == state do return
	previous_state := program.animation_state
	program.animation_state = state
	switch program.animation_state {
	case .Ready:
	program.animation.matrix_index = 0.0
	case .Playing:

	case .Paused:
	}
}

program_update :: proc() {
	if rl.IsKeyPressed(.F4) {
		rl.ToggleFullscreen()
	}

	ui_elements, top_bar_container, matrix_container := program_build_workspace_ui(&program.ui_context)
	ui_overlay_elements: []ui.Element

	switch program.state {
	case .Normal:
		program.mouse_state = program_handle_mouse(program.mouse_state, top_bar_container, matrix_container)
		if rl.IsKeyPressed(.TAB) {
			program.ui_element_focus = ui.focus_next_element(program.ui_element_focus, ui_elements, UI_ALLOWED_FOCUS)
		}
		if rl.IsKeyDown(.LEFT_CONTROL) {
			for hotkey, index in hotkey_with_modifier {
				if rl.IsKeyPressed(hotkey) {
					switch index {
					case .ProjectSave:
						program_save_project_from_project_string_or_open_dialog(&program)
					case .ProjectLoad:
						program_show_dialog(&program, .LoadProject)
					}
				}
			}
		} else {
			for hotkey, index in hotkey_without_modifier {
				if rl.IsKeyPressed(hotkey) {
					#partial switch index {
					case .AddIdentity:
						program_add_identity_matrix()
					case .AddTranslation:
						program_show_dialog(&program, .CreateTranslationMatrix)
					case .AddScale:
						program_show_dialog(&program, .CreateScaleMatrix)
					case .AddRotation:
						program_show_dialog(&program, .CreateRotationMatrix)
					case .ZoomXOnly:
						if program.grid_zoom_x_only {
							program.grid_zoom_x_only = false
							program.grid_zoom_y_only = false
						} else {
							program.grid_zoom_x_only = true
							program.grid_zoom_y_only = false
						}
					case .ZoomYOnly:
						if program.grid_zoom_y_only {
							program.grid_zoom_x_only = false
							program.grid_zoom_y_only = false
						} else {
							program.grid_zoom_x_only = false
							program.grid_zoom_y_only = true
						}
					}
				}
			}
		}
		if rl.WindowShouldClose() {
			program.window_should_close = true
		}
	case .Dialog:
		ui_overlay_elements = program_build_dialog_ui(&program.ui_overlay_context, program.dialog_type)
		if program.ui_overlay_queue_focus_first {
			program.ui_overlay_queue_focus_first = false
			program.ui_overlay_element_focus = ui.focus_next_element({container_index = 0, element_index = 0}, ui_overlay_elements, UI_ALLOWED_FOCUS)
		}
		if rl.IsKeyPressed(.TAB) {
			program.ui_overlay_element_focus = ui.focus_next_element(program.ui_overlay_element_focus, ui_overlay_elements, UI_ALLOWED_FOCUS)
		}
		if rl.IsKeyDown(.ENTER) {
			vals := program.dialog_data.input_float_values
			switch program.dialog_type {
			case .CreateTranslationMatrix: program_add_translation_matrix(vals[0], vals[1], vals[2])
			case .CreateScaleMatrix:       program_add_scalar_matrix(vals[0], vals[1], vals[2])
			case .CreateRotationMatrix:    program_add_rotation_matrix(vals[0])
			case .CreateSkewMatrix:        program_add_skew_matrix(vals[0], vals[1])
			case .SaveProject:
				path := strings.string_from_null_terminated_ptr(&program.dialog_data.input_text_buffers[0][0], DIALOG_STATE_TEXT_INPUT_FIELD_SIZE)
				if err := program_save_project(&program, path); err != nil {
					msg := fmt.caprint("Tried saving but got error: '", typeid_of(type_of(err)), ".", err, "'", sep = "")
					program_show_dialog(&program, .Error, msg)
				} else {
					program.project_save_string = program.dialog_data.input_text_buffers[0]
					program.state = .Normal
				}
			case .LoadProject:
				path := strings.string_from_null_terminated_ptr(&program.dialog_data.input_text_buffers[0][0], DIALOG_STATE_TEXT_INPUT_FIELD_SIZE)
				if err := program_load_project(&program, path); err != nil {
					msg := fmt.caprint("Tried loading but got error: '", typeid_of(type_of(err)), ".", err, "'", sep = "")
					program_show_dialog(&program, .Error, msg)
				} else {
					program.state = .Normal
				}
			case .Error:
				program.state = .Normal
			}
			program.animation.matrix_count = program.matrix_count
			program.state = .Normal
		}
		if rl.WindowShouldClose() {
			program.state = .Normal
		}
	}

	clear(&program.mouse_draggables)

	top_bar_container_br := rect_get_br(rect2(top_bar_container.area))
	matrix_container_br := rect_get_br(rect2(matrix_container.area))
	grid_text_clip := rect_from_area(v2{matrix_container_br.x, top_bar_container_br.y}, program_screen_size())
	grid_area := rect2{0.0, 0.0, **program_screen_size()}
	grid_color := rl.Color{255, 255, 255, 64}
	grid_origin_color := rl.Color{255, 255, 255, 128}
	draw_grid(program.grid, grid_area, rect_grow(grid_text_clip, -4.0), rect_grow(grid_text_clip, -32.0), grid_color, grid_origin_color)

	{
		animation := &program.animation

		if program.animation_state == .Playing {
			animation.matrix_index += 0.01
		}

		animation_draw(animation^, linalg.inverse(grid_world_to_grid_matrix(program.grid.zoom, program.grid.offset)))

		switch animation.type {
		case .Rectangle:
			append(&program.mouse_draggables, MouseDraggable_RectangleCornerData{
				corner = .Tl,
				corners_ref = &animation.shapes.rectangle,
				corner_ref = &animation.shapes.rectangle.tl})
			append(&program.mouse_draggables, MouseDraggable_RectangleCornerData{
				corner = .Tr,
				corners_ref = &animation.shapes.rectangle,
				corner_ref = &animation.shapes.rectangle.tr})
			append(&program.mouse_draggables, MouseDraggable_RectangleCornerData{
				corner = .Bl,
				corners_ref = &animation.shapes.rectangle,
				corner_ref = &animation.shapes.rectangle.bl})
			append(&program.mouse_draggables, MouseDraggable_RectangleCornerData{
				corner = .Br,
				corners_ref = &animation.shapes.rectangle,
				corner_ref = &animation.shapes.rectangle.br})
			append(&program.mouse_draggables, MouseDraggable_RectangleData{&animation.shapes.rectangle})
		}
	}

	grid_to_world_matrix := linalg.inverse(grid_world_to_grid_matrix(program.grid.zoom, program.grid.offset))
	for draggable in program.mouse_draggables {
		switch draggable in draggable {
		case MouseDraggable_Point:
			position_world := matrix3_transform_xy(grid_to_world_matrix, draggable.ref^)
			rl.DrawCircleV(position_world, program.mouse_draggable_radius, ANIMATION_COLOR_ORIGIN)
		case MouseDraggable_RectangleCornerData:
			position_world := matrix3_transform_xy(grid_to_world_matrix, draggable.corner_ref^)
			rl.DrawCircleV(position_world, program.mouse_draggable_radius, ANIMATION_COLOR_ORIGIN)
		case MouseDraggable_RectangleData:
		}
	}

	ui_element_focus := program.state == .Normal ? program.ui_element_focus : ui.element_id_invalid()
	program.ui_element_focus = program_render_ui_and_handle_focus(&program.ui_context, ui_element_focus, program.font_style, ui_elements)

	if len(ui_overlay_elements) > 0 {
		rl.DrawRectangle(0, 0, rl.GetScreenWidth(), rl.GetScreenHeight(), {0, 0, 0, 192})
		program.ui_overlay_element_focus = program_render_ui_and_handle_focus(
			&program.ui_overlay_context,
			program.ui_overlay_element_focus,
			program.font_style,
			ui_overlay_elements)
	}
}

program_add_identity_matrix :: proc() {
	value_strings, values := matrix_pool_get_mat3()
	write_matrix_to_values_and_value_strings(values, value_strings, mat3(1))
}

program_add_translation_matrix :: proc(x, y, z: f32) {
	value_strings, values := matrix_pool_get_mat3()
	write_matrix_to_values_and_value_strings(values, value_strings, mat3 {
		1, 0, x,
		0, 1, y,
		0, 0, z,
	})
}

program_add_scalar_matrix :: proc(x, y, z: f32) {
	value_strings, values := matrix_pool_get_mat3()
	write_matrix_to_values_and_value_strings(values, value_strings, linalg.matrix3_scale(v3{x, y, z}))
}

program_add_rotation_matrix :: proc(angle: f32) {
	value_strings, values := matrix_pool_get_mat3()
	radians: f32
	switch (program.rotation_mode) {
	case .Degrees: radians = linalg.RAD_PER_DEG * angle
	case .Radians: radians = angle
	}
	write_matrix_to_values_and_value_strings(values, value_strings, matrix3_rotate2(radians))
}

program_add_skew_matrix :: proc(x, y: f32) {
	value_strings, values := matrix_pool_get_mat3()
	mat := mat3 {
		1, x, 0,
		y, 1, 0,
		0, 0, 1,
	}
	write_matrix_to_values_and_value_strings(values, value_strings, mat)
}

write_matrix_to_values_and_value_strings :: proc(values: []f32, value_strings: []InputFloatField, mat: mat3) {
	for i in 0..<9 {
		col := i % 3
		row := i / 3
		values[i] = mat[col, row]
		write_float_to_buffer(value_strings[i][:], mat[col, row])
	}
}

write_float_to_buffer :: proc(buffer: []byte, value: f32) {
	switch {
	case fract(value) == 0.0:         fmt.bprintf(buffer, "%.0f", value)
	case fract(value * 10.0) == 0.0:  fmt.bprintf(buffer, "%.1f", value)
	case fract(value * 100.0) == 0.0: fmt.bprintf(buffer, "%.2f", value)
	case:                             fmt.bprintf(buffer, "%.3f", value)
	}
}

program_build_dialog_ui :: proc(ctx: ^ui.Context, dialog_type: ProgramDialogType) -> []ui.Element {
	size := program_screen_size()
	container_margin := size * 0.33
	element_margin: f32 = 4.0
	dialog_data := &program.dialog_data

	ui.start(ctx, V2_ZERO, program_screen_size())
	ui.container_begin(ui.dimensions_auto(), {margin = container_margin, padding = 8.0})
		header_label_config := ui.ElementConfiguration{label = program_dialog_messages[program.dialog_type], margin = element_margin}
		if dialog_type == .Error {
			header_label_config.color = ui.col(rl.RED)
		} else {
			header_label_config.color = ui.col(rl.WHITE)
		}
		ui.element(.Label, {}, header_label_config)

		if (len(program.dialog_message) > 0) {
			ui.element(.Label, {}, {label = program.dialog_message, color = ui.col(rl.WHITE), margin = element_margin})
		}

		switch dialog_type {
		case .CreateTranslationMatrix, .CreateScaleMatrix:
			ui_labeled_input_float_element("X", 4.0, &dialog_data.input_float_values[0], &dialog_data.input_float_value_strings[0])
			ui_labeled_input_float_element("Y", 4.0, &dialog_data.input_float_values[1], &dialog_data.input_float_value_strings[1])
			ui_labeled_input_float_element("Z", 4.0, &dialog_data.input_float_values[2], &dialog_data.input_float_value_strings[2])
			button_type: UiButtonType
			if dialog_type == .CreateTranslationMatrix {
				button_type = .AddTranslationMatrixConfirm
			} else {
				button_type = .AddScaleMatrixConfirm
			}
			ui_confirm_and_cancel_buttons(button_type, element_margin)
		case .CreateRotationMatrix:
			ui_labeled_input_float_element("Angle", 4.0, &dialog_data.input_float_values[0], &dialog_data.input_float_value_strings[0])
			toggle_group_dimensions := ui.dimensions_pixels(128.0, 32.0)
			toggle_group_options := enum_to_raygui_options_string(RotationMode, context.temp_allocator)
			toggle_group_config := ui.ElementConfiguration {label = toggle_group_options, margin = element_margin}
			toggle_group_data := new(UiElementData_ToggleGroup)
			toggle_group_data^ = {value = cast(^i32)&program.rotation_mode}
			ui.element(.ToggleGroup, toggle_group_dimensions, toggle_group_config, toggle_group_data)
			ui_confirm_and_cancel_buttons(.AddRotationMatrixConfirm, element_margin)
		case .CreateSkewMatrix:
			ui_labeled_input_float_element("X", 4.0, &dialog_data.input_float_values[0], &dialog_data.input_float_value_strings[0])
			ui_labeled_input_float_element("Y", 4.0, &dialog_data.input_float_values[1], &dialog_data.input_float_value_strings[1])
			ui_confirm_and_cancel_buttons(.AddSkewMatrixConfirm, element_margin)
		case .SaveProject:
			ui_labeled_input_text_element("Path", 4.0, dialog_data.input_text_buffers[0][:])
			ui_confirm_and_cancel_buttons(.ProjectSaveConfirm, element_margin)
		case .LoadProject:
			ui_labeled_input_text_element("Path", 4.0, dialog_data.input_text_buffers[0][:])
			ui_confirm_and_cancel_buttons(.ProjectLoadConfirm, element_margin)
		case .Error:
			button_data: ^UiElementData_Button
			button_data = new(UiElementData_Button, context.temp_allocator)
			button_data^ = {type = .DismissError}
			ui.element(.Button, ui.dimensions_pixels(96.0, 32.0), {label = "Ok", margin = element_margin}, button_data)
		}
	ui.container_end()
	return ui.end()
}

program_screen_size :: proc() -> v2 {
	return {f32(rl.GetScreenWidth()), f32(rl.GetScreenHeight())}
}

program_build_workspace_ui :: proc(ctx: ^ui.Context) -> (elements: []ui.Element, top_bar_container, matrix_container: ^ui.Element) {
	ui.start(ctx, {0, 0}, program_screen_size())
	top_bar_container_config := ui.ElementConfiguration {margin = 4.0}
	top_bar_element_margin: f32 = 4.0
	top_bar_container = ui.container_begin({ui.Size_Percentage(1.0), ui.Size_Pixels(48.0)}, top_bar_container_config)
	top_bar_inner_height := ui.get_element_inner_area(top_bar_container^).height
	top_bar_button_width := ui.Size_Pixels(top_bar_inner_height)
	top_bar_button_dimensions := ui.Dimensions {top_bar_button_width, ui.Size_Percentage(1.0)}
	top_bar_button_config := ui.ElementConfiguration {margin = top_bar_element_margin}
	top_bar_dropdown_dimensions := ui.Dimensions {ui.Size_Pixels(160.0), ui.Size_Percentage(1.0)}
	top_bar_dropdown_config := ui.ElementConfiguration {margin = top_bar_element_margin}
	{
		button_margin := top_bar_element_margin
		button_config: ui.ElementConfiguration
		button_tooltip: cstring
		button_dimensions := top_bar_button_dimensions
		button_data: ^UiElementData_Button

		divider_dimensions := ui.Dimensions{ui.Size_Pixels(1.0), ui.Size_Percentage(1.0)}
		divider_config := ui.ElementConfiguration{padding = 4.0, color = ui.col(rl.WHITE)}

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Save project\n(CTRL+", hotkey_with_modifier[.ProjectSave], ")", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_SAVE, tooltip = button_tooltip}
		button_data^ = {type = .ProjectSave}
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_config = {margin = button_margin, label = RAYGUI_ICON_SAVE_AS, tooltip = "Save project as..."}
		button_data^ = {type = .ProjectSaveAs}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Load project\n(CTRL+", hotkey_with_modifier[.ProjectLoad], ")", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_LOAD, tooltip = button_tooltip}
		button_data^ = {type = .ProjectLoad}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_config = {margin = button_margin, label = RAYGUI_ICON_NEW, tooltip = "New project"}
		button_data^ = {type = .ProjectNew}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		ui.same_line()
		ui.element(.Divider, divider_dimensions, divider_config)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Add identity\nmatrix (", hotkey_without_modifier[.AddIdentity], ")", sep = "")
		button_config = {margin = button_margin, label = "1", tooltip = button_tooltip}
		button_data^ = {type = .AddIdentity}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Add translation\nmatrix (", hotkey_without_modifier[.AddTranslation], ")", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_TRANSLATION_MATRIX, tooltip = button_tooltip}
		button_data^ = {type = .AddTranslation}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Add scale\nmatrix (", hotkey_without_modifier[.AddScale], ")", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_SCALE_MATRIX, tooltip = button_tooltip}
		button_data^ = {type = .AddScale}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Add rotation\nmatrix (", hotkey_without_modifier[.AddRotation], ")", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_ROTATION_MATRIX, tooltip = button_tooltip}
		button_data^ = {type = .AddRotation}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_data = new(UiElementData_Button, context.temp_allocator)
		button_tooltip = fmt.ctprint("Add rotation\nmatrix", sep = "")
		button_config = {margin = button_margin, label = RAYGUI_ICON_SKEW_MATRIX, tooltip = button_tooltip}
		button_data^ = {type = .AddSkewMatrix}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		// TODO (synthas): Use raygui border theme color for consistency
		// TODO (synthas): Padding and margin doesn't work here for some reason
		ui.same_line()
		ui.element(.Divider, divider_dimensions, divider_config)

		play_button_label: cstring
		button_data = new(UiElementData_Button, context.temp_allocator)
		switch program.animation_state {
		case .Ready:
			button_config = {margin = button_margin, label = RAYGUI_ICON_PLAY, tooltip = "Play\nanimation"}
			button_data^ = {type = .StartTransformation}
		case .Paused:
			button_config = {margin = button_margin, label = RAYGUI_ICON_PLAY, tooltip = "Resume\nanimation"}
			button_data^ = {type = .ResumeTransformation}
		case .Playing:
			button_config = {margin = button_margin, label = RAYGUI_ICON_PAUSE, tooltip = "Pause\nanimation"}
			button_data^ = {type = .PauseTransformation}
		}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_config = {margin = button_margin, label = RAYGUI_ICON_RESET, tooltip = "Reset\nanimation"}
		button_data = new(UiElementData_Button, context.temp_allocator)
		button_data^ = {type = .ResetTransformation}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		button_config = {margin = button_margin, label = "1", tooltip = "Center\nanimation"}
		button_data = new(UiElementData_Button, context.temp_allocator)
		button_data^ = {type = .CenterView}
		ui.same_line()
		ui.element(.Button, button_dimensions, button_config, button_data)

		ui.same_line()
		ui.element(.Divider, divider_dimensions, divider_config)

		slider_config: ui.ElementConfiguration
		slider_data: ^UiElementData_Slider
		slider_dimensions := ui.Dimensions {top_bar_button_width * 5.0, ui.Size_Percentage(1.0)}
		slider_config = {margin = top_bar_element_margin * 2}
		slider_data = new(UiElementData_Slider, context.temp_allocator)
		slider_data^ = {
			value = &program.animation.matrix_index,
			max = f32(program.animation.matrix_count),
			min = 0.0
		}
		ui.same_line()
		ui.element(.Slider, slider_dimensions, slider_config, slider_data)
	}
	ui.container_end()

	side_bar_container_config := ui.ElementConfiguration {margin = 4.0}
	side_bar_container_data := new(UiElementData_Container, context.temp_allocator)
	side_bar_container_data^ = {type = .Scroll, scroll = program.matrix_scroll}
	matrix_container = ui.container_begin({ui.Size_Pixels(320.0), ui.Size_PercentageRemainder(1.0)}, side_bar_container_config, side_bar_container_data)
	for i in 0..<program.matrix_count {
		container_config := ui.ElementConfiguration{margin = 8.0, label = fmt.ctprintf("Matrix %d", i)}
		container_dimensions := ui.Dimensions {ui.Size_Percentage(1.0), ui.Size_Pixels(192.0)}
		mat := program.matrix_float_pool[i * 9 : i * 9 + 9]
		value_strings := program.matrix_value_string_pool[i * 9 : i * 9 + 9]
		ui_mat3(i, mat, value_strings, container_dimensions, container_config)
	}
	ui.container_end()
	elements = ui.end()
	return
}

program_handle_mouse :: proc(mouse_state: MouseState, top_bar_container, matrix_container: ^ui.Element) -> MouseState {
	mouse := rl.GetMousePosition()
	mouse_wheel := rl.GetMouseWheelMoveV()
	world_to_grid_matrix := grid_world_to_grid_matrix(program.grid.zoom, program.grid.offset)
	grid_to_world_matrix := linalg.inverse(world_to_grid_matrix)

	mouse_state := mouse_state

	state_label: switch mouse_state {
	case .Hover:
		if rect_has_point(rect2(matrix_container.area), mouse) {
			mouse_state = .HoverMatrices
			break state_label
		}
		if rect_has_point(rect2(top_bar_container.area), mouse) {
			break state_label
		}
		if rl.IsMouseButtonPressed(.LEFT) {
			for draggable in program.mouse_draggables {
				switch draggable in draggable {
				case MouseDraggable_Point:
					circle_position := matrix3_transform_xy(grid_to_world_matrix, draggable.ref^)
					if linalg.distance(mouse, circle_position) <= program.mouse_draggable_radius {
						program.mouse_current_draggable = draggable
						mouse_state = .DraggingDraggable
						break state_label
					}
				case MouseDraggable_RectangleCornerData:
					circle_position := matrix3_transform_xy(grid_to_world_matrix, draggable.corner_ref^)
					if linalg.distance(mouse, circle_position) <= program.mouse_draggable_radius {
						program.mouse_current_draggable = draggable
						mouse_state = .DraggingDraggable
						break state_label
					}
				case MouseDraggable_RectangleData:
					corners_world := rectangle_corners_transform_mat3(grid_to_world_matrix, draggable.corners^)
					rect := rect_from(corners_world.tl, corners_world.tr, corners_world.br, corners_world.bl)
					if rect_has_point(rect, mouse) {
						program.mouse_current_draggable = draggable
						mouse_state = .DraggingDraggable
						break state_label
					}
				}
			}
			mouse_state = .DraggingGrid
			break state_label
		}
		screen_size := v2(program_screen_size())
		grid_zoom_in_on(&program.grid, {0, 0, screen_size.x, screen_size.y}, rl.GetMousePosition(), mouse_wheel.y * 0.1 * program.grid_zoom_speed)

	case .DraggingDraggable:
		if !rl.IsMouseButtonDown(.LEFT) {
			mouse_state = .Hover
			break state_label
		}
		draggable := program.mouse_current_draggable
		switch draggable in draggable {
		case MouseDraggable_Point:
			draggable.ref^ = matrix3_transform_xy(world_to_grid_matrix, mouse)
		case MouseDraggable_RectangleCornerData:
			position := matrix3_transform_xy(world_to_grid_matrix, mouse)
			corners := rectangle_corners_move_corner(draggable.corners_ref^, position, draggable.corner)
			draggable.corners_ref^ = corners
		case MouseDraggable_RectangleData:
			mouse_delta_grid := rl.GetMouseDelta() * grid_get_zoom(program.grid.zoom)
			draggable.corners^ = rectangle_corners_add(draggable.corners^, mouse_delta_grid)
		}
	case .DraggingGrid:
		program.grid.offset -= rl.GetMouseDelta() * grid_get_zoom(program.grid.zoom)
		if !rl.IsMouseButtonDown(.LEFT) {
			mouse_state = .Hover
			break state_label
		}
	case .HoverMatrices:
		program.matrix_scroll = max(0, program.matrix_scroll - mouse_wheel.y * program.matrix_scroll_speed)
		if !rect_has_point(rect2(matrix_container.area), mouse) {
			mouse_state = .Hover
			break state_label
		}
	}

	return mouse_state
}

program_render_ui_and_handle_focus :: proc(ctx: ^ui.Context, focus_element_id: ui.ElementId, font_style: FontStyle, elements: []ui.Element) -> (focus: ui.ElementId) {
	tooltip_text: cstring
	tooltip_position: v2

	scissor_container: ^ui.Element
	render_above: ui.Element
	render_above.id = ui.element_id_invalid()
	focus_element_id := focus_element_id

	for &element in elements {
		offset: v2
		if scissor_container != nil {
			if element.id.container_index < scissor_container.id.container_index {
				rl.EndScissorMode()
				scissor_container = nil
			} else {
				offset.y = -(cast(^UiElementData_Container)scissor_container.data).scroll
			}
		}

		area := rect_translate(rl.Rectangle(element.area), offset)
		color := rl.Color(element.color)
		#partial switch element.type {
		case .Container:
			dim := rl.Color {0, 0, 0, 192}
			if element.data != nil {
				data := cast(^UiElementData_Container)element.data
				switch data.type {
				case .Normal:
					rl.DrawRectangleRounded(area, 0.1, 4.0, dim)
					rl.GuiGroupBox(area, element.label)
				case .Matrix:
					element_matrix_index := f32(data.matrix_index + 1)
					animation_matrix_index := animation_get_eased_progress(program.animation)
					matrix_animation_distance := element_matrix_index - animation_matrix_index
					alpha := max(0.0, 1.0 - abs(matrix_animation_distance))
					color := rl.Color{128, 255, 128, u8(alpha * 64.0)}
					rl.DrawRectangleRec(area, color)

					matrix_area := ui.rect_grow(ui.rect2(area), element.margin / 2.0)
					tl, tr, br, bl := ui.rect_get_corners(matrix_area)
					col := rl.WHITE
					hook_length: f32 = 4.0
					rl.DrawLineEx(tl, bl, data.thickness, col)
					rl.DrawLineEx(tl, tl + V2_RIGHT * hook_length, data.thickness, col)
					rl.DrawLineEx(bl, bl + V2_RIGHT * hook_length, data.thickness, col)
					rl.DrawLineEx(tr, br, data.thickness, col)
					rl.DrawLineEx(tr, tr + V2_LEFT * hook_length, data.thickness, col)
					rl.DrawLineEx(br, br + V2_LEFT * hook_length, data.thickness, col)
				case .Scroll:
					rl.DrawRectangleRounded(area, 0.1, 4.0, dim)
					rl.GuiGroupBox(area, element.label)
					scissor_container = &element
					rl.BeginScissorMode(**rect2_to_irect2(area))
				}
			} else {
				rl.DrawRectangleRounded(area, 0.1, 4.0, dim)
				rl.GuiGroupBox(area, element.label)
			}
		case .Button:
			if len(element.tooltip) > 0 && rect_has_point(area, rl.GetMousePosition()) {
				tooltip_text = element.tooltip
				// TODO (synthas): implement keeping the rectangle within screen borders
				tooltip_position = rl.GetMousePosition()
			}
			if rl.GuiButton(area, element.label) {
				if element.data == nil do break
				data := cast(^UiElementData_Button)element.data
				switch data.type {
				case .Nothing:
				case .AddIdentity:    program_add_identity_matrix()
				case .AddTranslation: program_show_dialog(&program, .CreateTranslationMatrix)
				case .AddScale:       program_show_dialog(&program, .CreateScaleMatrix)
				case .AddRotation:    program_show_dialog(&program, .CreateRotationMatrix)
				case .AddSkewMatrix:  program_show_dialog(&program, .CreateSkewMatrix)
				case .AddTranslationMatrixConfirm:
					inputs := program.dialog_data.input_float_values
					program_add_translation_matrix(inputs[0], inputs[1], inputs[2])
					program.state = .Normal
				case .AddScaleMatrixConfirm:
					inputs := program.dialog_data.input_float_values
					program_add_scalar_matrix(inputs[0], inputs[1], inputs[2])
					program.state = .Normal
				case .AddRotationMatrixConfirm:
					program_add_rotation_matrix(program.dialog_data.input_float_values[0])
					program.state = .Normal
				case .AddSkewMatrixConfirm:
					inputs := program.dialog_data.input_float_values
					program_add_skew_matrix(inputs[0], inputs[1])
				case .ExitDialog:
					program.state = .Normal
				case .StartTransformation:
					if program.matrix_count > 0 {
						program.animation_state = .Playing
						program.animation.matrix_index = 0.0
					}
				case .PauseTransformation:
					program.animation_state = .Paused
				case .ResumeTransformation:
					if animation_is_finished(program.animation) {
						program.animation.matrix_index = 0.0
					}
					program.animation_state = .Playing
				case .ResetTransformation:
				program.animation.matrix_index = 0.0
				case .ProjectSaveConfirm:
					path := strings.string_from_null_terminated_ptr(&program.dialog_data.input_text_buffers[0][0], DIALOG_STATE_TEXT_INPUT_FIELD_SIZE)
					if err := program_save_project(&program, path); err != nil {
						program_show_dialog(&program, .Error, fmt.caprint(typeid_of(type_of(err)), ".", err))
					} else {
						program.state = .Normal
					}
				case .ProjectLoadConfirm:
					path := strings.string_from_null_terminated_ptr(&program.dialog_data.input_text_buffers[0][0], DIALOG_STATE_TEXT_INPUT_FIELD_SIZE)
					if err := program_load_project(&program, path); err != nil {
						msg := fmt.caprint("Tried loading but got error: '", typeid_of(type_of(err)), ".", err, "'", sep = "")
						program_show_dialog(&program, .Error, msg)
					} else {
						program.state = .Normal
					}
				case .MatrixDelete:
					if data.target_matrix + 1 < program.matrix_count {
						floats := program.matrix_float_pool
						inputs := program.matrix_value_string_pool
						amount := program.matrix_count - data.target_matrix
						matrix_values_size := size_of(f32) * 9
						matrix_inputs_size := size_of(InputFloatField) * 9
						mem.copy(&floats[data.target_matrix * 9], &floats[data.target_matrix * 9 + 9], matrix_values_size * amount)
						mem.copy(&inputs[data.target_matrix * 9][0], &inputs[data.target_matrix * 9 + 9][0], matrix_inputs_size * amount)
					}
					program.matrix_count = max(program.matrix_count - 1, 0)
				case .MatrixMoveUp:
					if data.target_matrix <= 0 do break;
					matrix_move_to(program.matrix_float_pool, program.matrix_value_string_pool, data.target_matrix, data.target_matrix - 1)
				case .MatrixMoveDown:
					if data.target_matrix + 1 >= program.matrix_count do break;
					matrix_move_to(program.matrix_float_pool, program.matrix_value_string_pool, data.target_matrix, data.target_matrix + 1)
				case .CenterView:
					// TODO (synthas): Could be improved to center the whole animation
					// TODO (synthas): Reset zoom
					program.grid.offset = animation_get_center(program.animation) - program_screen_size() * grid_get_zoom(program.grid.zoom) / 2.0
				case .ProjectSave:
					program_save_project_from_project_string_or_open_dialog(&program)
				case .ProjectSaveAs:
					program_show_dialog(&program, .SaveProject)
				case .ProjectLoad:
					program_show_dialog(&program, .LoadProject)
				case .ProjectNew:
				case .ResetGrid:
					program.grid.offset = program_screen_size() / 2.0
					program.grid.zoom = 1.0
					program.grid.cell_size_px = 50.0
				case .DismissError:
					program.state = .Normal
				}
				if data.type in UiButtonRecalculateFinishGroup {
					program.animation.matrix_count = program.matrix_count
				}
			}
		case .Slider:
			data := cast(^UiElementData_Slider)element.data
			rl.GuiSlider(area, element.label, "", data.value, data.min, data.max)
		case .InputFloat:
			data := cast(^UiElementData_FloatInput)element.data
			value_previous := data.value^
			if rl.GuiValueBoxFloat(area, element.label, data.value_string, data.value, focus_element_id == element.id) == 1 {
				focus_element_id = element.id
			}
			if value_previous != data.value^ && .UpdateMatrix in data.tag {
				program.animation.matrix_count = program.matrix_count
			}
		case .InputText:
			data := cast(^UiElementData_TextInput)element.data
			if rl.GuiTextBox(area, data.str, i32(program.font_style.size), focus_element_id == element.id) {
				focus_element_id = element.id
			}
		case .Label:
			rl.DrawTextEx(font_style.font, element.label, rect_get_tl(area), font_style.size, font_style.spacing, color)
		case .Divider:
			rl.DrawRectangleRec(rect2(ui.get_element_outer_area(element)), color)
		case .ToggleGroup:
			data := cast(^UiElementData_ToggleGroup)element.data
			rl.GuiToggleGroup(area, element.label, data.value)
		case:
			rl.DrawRectangleRec(area, rl.MAGENTA)
		}
	}

	if scissor_container != nil {
		rl.EndScissorMode()
		scissor_container = nil
	}

	if len(tooltip_text) > 0 {
		position := tooltip_position + program.ui_tooltip_offset
		size := measure_text(tooltip_text, program.font_style)
		bounds := rect_grow(rect_from(position, size), 4.0)
		rl.DrawRectangleRec(bounds, rl.BLACK)
		rl.DrawRectangleLinesEx(bounds, 1.0, rl.WHITE)
		draw_multiline_text_centered(tooltip_text, position, program.font_style, rl.WHITE, context.temp_allocator)
	}

	return focus_element_id
}

ui_confirm_and_cancel_buttons :: proc(button_type_add: UiButtonType, margin: f32) {
	button_data: ^UiElementData_Button
	button_data = new(UiElementData_Button, context.temp_allocator)
	button_data^ = {type = button_type_add}
	ui.element(.Button, ui.dimensions_pixels(96.0, 32.0), {label = "Add", margin = margin}, button_data)

	button_data = new(UiElementData_Button, context.temp_allocator)
	button_data^ = {type = .ExitDialog}
	ui.same_line()
	ui.element(.Button, ui.dimensions_pixels(96.0, 32.0), {label = "Cancel", margin = margin}, button_data)
}

ui_measure_text :: proc(str: cstring, font_data: rawptr) -> ui.v2 {
	style := cast(^FontStyle)font_data
	return rl.MeasureTextEx(style.font, str, style.size, style.spacing)
}

ui_mat3 :: proc(idx: int, mat: []f32, value_strings: []InputFloatField, dimensions: ui.Dimensions, config: ui.ElementConfiguration, allocator := context.temp_allocator) {
	ui.container_begin(dimensions, config)
	defer ui.container_end()

	button_config := ui.ElementConfiguration {margin = 4.0}
	button_data: ^UiElementData_Button

	button_config.label = RAYGUI_ICON_TRASH
	button_data = new(UiElementData_Button, allocator)
	button_data^ = {target_matrix = idx, type = .MatrixDelete}
	ui.element(.Button, ui.dimensions_pixels(32.0), button_config, button_data)

	button_config.label = RAYGUI_ICON_UP
	button_data = new(UiElementData_Button, allocator)
	button_data^ = {target_matrix = idx, type = .MatrixMoveUp}
	ui.same_line()
	ui.element(.Button, ui.dimensions_pixels(32.0), button_config, button_data)

	button_config.label = RAYGUI_ICON_DOWN
	button_data = new(UiElementData_Button, allocator)
	button_data^ = {target_matrix = idx, type = .MatrixMoveDown}
	ui.same_line()
	ui.element(.Button, ui.dimensions_pixels(32.0), button_config, button_data)

	matrix_container_dimensions := ui.Dimensions {ui.Size_Percentage(1.0), ui.Size_PercentageRemainder(1.0)}
	matrix_container_config := ui.ElementConfiguration {margin = 4.0}
	matrix_container_data := new(UiElementData_Container, allocator)
	matrix_container_data^ = {type = .Matrix, thickness = 2.0, matrix_index = idx}
	ui.container_begin(matrix_container_dimensions, matrix_container_config, matrix_container_data)
		matrix_input_dimensions := ui.Dimensions {ui.Size_Percentage(1.0 / 3.0), ui.Size_Percentage(1.0 / 3.0)}
		matrix_input_config := ui.ElementConfiguration {margin = 4.0}
		#unroll for col in 0..<3 {
			#unroll for row in 0..<3 {
				data := new(UiElementData_FloatInput, allocator)
				index := row * 3 + col
				data^ = {value = &mat[index], value_string = cstring(&value_strings[index][0]), tag = {.UpdateMatrix}}
				ui.element(.InputFloat, matrix_input_dimensions, matrix_input_config, data)
				ui.same_line()
			}
			program.ui_context.same_line = false
		}
	ui.container_end()
}

ui_labeled_input_float_element :: proc(label: cstring, margin: f32, value: ^f32, value_string: ^InputFloatField, allocator := context.temp_allocator) -> ^ui.Element {
	label := fmt.ctprintf("%s: ", label)
	label_element := ui.element(.Label, {}, {label = label, color = ui.col(rl.WHITE), margin = margin})
	dimensions := ui.Dimensions{ui.Size_Pixels(64.0), ui.dimensions_pixels(ui.rect_get_size(ui.get_element_outer_area(label_element^))).height}
	ui.same_line()
	input_data := new(UiElementData_FloatInput, context.temp_allocator)
	input_data^ = {value = value, value_string = cstring(&value_string[0])}
	return ui.element(.InputFloat, dimensions, {margin = margin}, input_data)
}

ui_labeled_input_text_element :: proc(label: cstring, margin: f32, str: []byte, allocator := context.temp_allocator) -> ^ui.Element {
	label := fmt.ctprintf("%s: ", label)
	label_element := ui.element(.Label, {}, {label = label, color = ui.col(rl.WHITE), margin = margin})
	dimensions := ui.Dimensions{ui.Size_Pixels(64.0), ui.dimensions_pixels(ui.rect_get_size(ui.get_element_outer_area(label_element^))).height}
	ui.same_line()
	input_data := new(UiElementData_TextInput, context.temp_allocator)
	input_data^ = {str = cstring(&str[0])}
	return ui.element(.InputText, dimensions, {margin = margin}, input_data)
}