extends Control

## D-058: World radial menu — right-click, 2 spokes v0.1 (Observe + Insert).
## Insert-styled: geometric lines, thin spokes, nearly transparent.
## Renders on InsertOverlay (CanvasLayer 10).
## Drag-release for power users, click-click for newcomers.
## Insert spoke sends PauseSimulation on activate (#518/D-058).
## Selecting any non-Insert spoke, cancelling, or pressing Escape calls
## deactivate_insert() which sends ResumeSimulation. Pause/resume are idempotent.

signal spoke_selected(spoke_name: String)

enum Spoke { NONE, OBSERVE, INSERT }

const SPOKE_RADIUS := 60.0
const INNER_RADIUS := 16.0
const LINE_COLOR := Color("#c8d0e0")
const LINE_DIM := Color(0.78, 0.82, 0.88, 0.3)
const HOVER_COLOR := Color("#e0e8ff")
const BG_COLOR := Color(0.05, 0.05, 0.08, 0.35)
const LINE_WIDTH := 1.5
const ICON_SIZE := 12.0

# Spoke angles: Observe = up (270°), Insert = down (90°)
const SPOKE_ANGLES := {
	Spoke.OBSERVE: -PI / 2.0,
	Spoke.INSERT: PI / 2.0,
}

const SPOKE_NAMES := {
	Spoke.OBSERVE: "Observe",
	Spoke.INSERT: "Insert",
}

var _open: bool = false
var _origin: Vector2 = Vector2.ZERO
var _hovered_spoke: int = Spoke.NONE
var _drag_mode: bool = false
var _insert_active: bool = false
var _cached_font: Font = null


func _ready() -> void:
	var menu_extent := SPOKE_RADIUS + ICON_SIZE + 20.0  # spoke + icon + label margin
	custom_minimum_size = Vector2(menu_extent * 2.0, menu_extent * 2.0)
	size = custom_minimum_size
	visible = false
	mouse_filter = Control.MOUSE_FILTER_STOP
	_cached_font = get_theme_default_font()


func _input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_RIGHT:
			if event.pressed and not _open:
				_open_menu(event.global_position)
				get_viewport().set_input_as_handled()
			elif not event.pressed and _open and _drag_mode:
				# Drag-release: select hovered spoke
				_confirm_selection()
				get_viewport().set_input_as_handled()
			elif event.pressed and _open and not _drag_mode:
				# Click-click: second click confirms
				_confirm_selection()
				get_viewport().set_input_as_handled()

	if event is InputEventMouseMotion and _open:
		_update_hover(event.global_position)
		queue_redraw()


func _open_menu(pos: Vector2) -> void:
	_open = true
	_origin = pos
	_hovered_spoke = Spoke.NONE
	_drag_mode = true
	visible = true
	# Position the control so _origin is at center
	global_position = _origin - size / 2.0
	queue_redraw()


func _close_menu() -> void:
	_open = false
	_hovered_spoke = Spoke.NONE
	_drag_mode = false
	visible = false


# Handle Escape key to dismiss menu and deactivate insert if active.
func _unhandled_input(event: InputEvent) -> void:
	if _open and event.is_action_pressed("ui_cancel"):
		if _insert_active:
			deactivate_insert()
		_close_menu()
		get_viewport().set_input_as_handled()


func _update_hover(mouse_pos: Vector2) -> void:
	var delta := mouse_pos - _origin
	var dist := delta.length()

	if dist < INNER_RADIUS:
		_hovered_spoke = Spoke.NONE
		_drag_mode = dist > 4.0  # Still dragging if moved at all
		return

	_drag_mode = true
	var angle := delta.angle()

	# Find closest spoke
	var best_spoke: int = Spoke.NONE
	var best_diff: float = PI  # Max angular distance
	for spoke in SPOKE_ANGLES:
		var spoke_angle: float = SPOKE_ANGLES[spoke]
		var diff := absf(angle_difference(angle, spoke_angle))
		if diff < best_diff and diff < PI / 3.0:  # 60° acceptance zone
			best_diff = diff
			best_spoke = spoke

	_hovered_spoke = best_spoke


func _confirm_selection() -> void:
	if _hovered_spoke != Spoke.NONE:
		var name: String = SPOKE_NAMES.get(_hovered_spoke, "")
		spoke_selected.emit(name)

		if _hovered_spoke == Spoke.INSERT:
			_activate_insert()
		elif _insert_active:
			# Selecting any non-Insert spoke closes the insert and resumes sim
			deactivate_insert()

	elif _insert_active:
		# No spoke selected (cancelled) while insert active — close insert
		deactivate_insert()

	_close_menu()


func _activate_insert() -> void:
	# #518/D-058: Send PauseSimulation when insert opens. Idempotent —
	# if already paused (e.g. Gauntlet interlude), server ignores duplicate.
	if not _insert_active:
		_insert_active = true
		(
			SimBridge
			. send_input(
				{
					"action": InputMapper.Action.PAUSE,
					"timestamp_msec": Time.get_ticks_msec(),
				}
			)
		)


func deactivate_insert() -> void:
	# #518/D-058: Send ResumeSimulation when insert closes.
	if _insert_active:
		_insert_active = false
		(
			SimBridge
			. send_input(
				{
					"action": InputMapper.Action.UNPAUSE,
					"timestamp_msec": Time.get_ticks_msec(),
				}
			)
		)


func _draw() -> void:
	if not _open:
		return

	var center := size / 2.0

	# Background circle
	draw_circle(center, SPOKE_RADIUS + 8.0, BG_COLOR)

	# Inner ring
	draw_arc(center, INNER_RADIUS, 0, TAU, 32, LINE_DIM, 1.0)

	# Outer ring
	draw_arc(center, SPOKE_RADIUS, 0, TAU, 48, LINE_DIM, 1.0)

	# Spokes
	for spoke in SPOKE_ANGLES:
		var angle: float = SPOKE_ANGLES[spoke]
		var dir := Vector2(cos(angle), sin(angle))
		var inner_pt := center + dir * INNER_RADIUS
		var outer_pt := center + dir * SPOKE_RADIUS

		var color := HOVER_COLOR if spoke == _hovered_spoke else LINE_COLOR
		var width := LINE_WIDTH * 2.0 if spoke == _hovered_spoke else LINE_WIDTH

		# Spoke line
		draw_line(inner_pt, outer_pt, color, width)

		# Icon at spoke tip
		var icon_center := center + dir * (SPOKE_RADIUS + ICON_SIZE + 4.0)
		_draw_spoke_icon(spoke, icon_center, color)

		# Label
		var label: String = SPOKE_NAMES.get(spoke, "")
		var text_size := _cached_font.get_string_size(label, HORIZONTAL_ALIGNMENT_CENTER, -1, 11)
		var label_pos := icon_center + Vector2(-text_size.x / 2.0, ICON_SIZE + 14.0)
		draw_string(_cached_font, label_pos, label, HORIZONTAL_ALIGNMENT_LEFT, -1, 11, color)


func _draw_spoke_icon(spoke: int, center: Vector2, color: Color) -> void:
	match spoke:
		Spoke.OBSERVE:
			# Eye icon — simple geometric eye shape
			var hw := ICON_SIZE * 0.7
			var hh := ICON_SIZE * 0.4
			# Eye outline (two arcs)
			draw_arc(center - Vector2(0, hh * 0.3), hw, PI * 0.15, PI * 0.85, 12, color, 1.0)
			draw_arc(center + Vector2(0, hh * 0.3), hw, -PI * 0.85, -PI * 0.15, 12, color, 1.0)
			# Pupil
			draw_circle(center, 2.5, color)

		Spoke.INSERT:
			# Phone/device icon — simple rectangle
			var hw := ICON_SIZE * 0.35
			var hh := ICON_SIZE * 0.55
			draw_rect(Rect2(center - Vector2(hw, hh), Vector2(hw * 2, hh * 2)), color, false, 1.0)
			# Screen line
			draw_line(
				center - Vector2(hw * 0.6, hh * 0.3),
				center + Vector2(hw * 0.6, -hh * 0.3),
				color,
				1.0
			)


# -- Public API ---------------------------------------------------------------


func is_open() -> bool:
	return _open


func get_hovered_spoke() -> String:
	return SPOKE_NAMES.get(_hovered_spoke, "")


func is_insert_active() -> bool:
	return _insert_active