class_name ImplantPending
extends Control
## Diegetic "pending / working" indicator for the implant overlay (D-169).
##
## An animated bracket sweep — `[ >>>>········ ]` — with a caption above it.
## Linear left-to-right fill that loops; reads as a bounded machine process,
## not an OS spinner (Araminta's spec, #960).
##
## LAYER SEPARATION: this belongs to the IMPLANT (diegetic, in-fiction) UI layer
## only. It styles exclusively from ImplantTheme. The global / non-diegetic UI
## layer must NOT reuse these visuals — if that layer needs a busy indicator it
## gets its own component with its own look. Sharing the sweep *logic* is fine;
## resting on the same theme or glyphs is not.
##
## API: start(label) shows + animates; stop() hides + resets. Starts hidden, so
## at rest the player sees nothing.

const SWEEP_PERIOD: float = 1.2  # seconds per left-to-right pass (linear, looping)
const INTERIOR_WIDTH: float = 160.0  # px between the brackets
const SWEEP_WIDTH: float = 28.0  # px width of the moving fill
const DEFAULT_WIDTH: float = 220.0

var _label_text: String = "WORKING"
var _sweep_t: float = 0.0  # normalized 0..1 sweep position
var _theme: ImplantTheme = null
var _font: Font = null


func _ready() -> void:
	_font = ThemeDB.fallback_font
	custom_minimum_size = Vector2(DEFAULT_WIDTH, 40.0)
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	visible = false
	set_process(false)


## Show the indicator and begin animating. `label` is uppercased for display.
func start(label: String = "WORKING") -> void:
	_label_text = label.to_upper()
	_sweep_t = 0.0
	visible = true
	set_process(true)
	queue_redraw()


## Hide the indicator and stop animating.
func stop() -> void:
	visible = false
	set_process(false)
	_sweep_t = 0.0


func apply_implant_theme(t: ImplantTheme) -> void:
	_theme = t
	queue_redraw()


func _process(delta: float) -> void:
	_sweep_t = fmod(_sweep_t + delta / SWEEP_PERIOD, 1.0)
	queue_redraw()


func _draw() -> void:
	if _font == null:
		return
	var dim: Color = _theme.text_dim if _theme else Color("#667788")
	var accent: Color = _theme.accent_active if _theme else Color("#f0d060")
	accent.a = 0.6
	var fs: int = _theme.font_body if _theme else 11
	var line_h: float = float(_theme.line_height if _theme else 18)
	var w: float = size.x if size.x > 0.0 else DEFAULT_WIDTH

	# Caption — centered, dim.
	var cap_w: float = _font.get_string_size(_label_text, HORIZONTAL_ALIGNMENT_LEFT, -1, fs).x
	draw_string(
		_font,
		Vector2((w - cap_w) * 0.5, float(fs)),
		_label_text,
		HORIZONTAL_ALIGNMENT_LEFT,
		-1,
		fs,
		dim
	)

	# Bracket row — centered group: [ <interior> ]
	var glyph_w: float = _font.get_string_size("[", HORIZONTAL_ALIGNMENT_LEFT, -1, fs).x
	var group_w: float = glyph_w * 2.0 + INTERIOR_WIDTH
	var gx: float = (w - group_w) * 0.5
	var baseline_y: float = line_h + float(fs)
	draw_string(_font, Vector2(gx, baseline_y), "[", HORIZONTAL_ALIGNMENT_LEFT, -1, fs, dim)
	draw_string(
		_font,
		Vector2(gx + glyph_w + INTERIOR_WIDTH, baseline_y),
		"]",
		HORIZONTAL_ALIGNMENT_LEFT,
		-1,
		fs,
		dim
	)

	# Sweep fill — a thin bar travelling across the bracket interior.
	var interior_x: float = gx + glyph_w
	var travel: float = INTERIOR_WIDTH - SWEEP_WIDTH
	var sweep_x: float = interior_x + _sweep_t * travel
	var sweep_y: float = baseline_y - float(fs) * 0.35
	draw_rect(Rect2(sweep_x, sweep_y, SWEEP_WIDTH, 1.0), accent)