extends Control

# #111: what a vessel costs, in glyphs.
#
# The craft menu used to spell prices out - "15 ore · 5 gas" - which is three
# words of chrome per button on a screen with six of them, and it left the
# vessel's own name fighting for the same two lines. Every resource already
# has a glyph the resource bar and the transfer list draw; this reuses it, so
# a price reads as a number beside a mark rather than as a sentence.
#
# Built in code from the costs it is given, so a vessel whose price changes -
# or a resource added to the catalog - needs nothing here.

const GLYPH_SIZE: float = 26.0
const GAP: float = 4.0
const PAIR_GAP: float = 14.0
const FONT_SIZE: int = 24

var _pairs: Array = []


func _ready() -> void:
	mouse_filter = Control.MOUSE_FILTER_IGNORE


func set_costs(costs: Dictionary) -> void:
	for pair in _pairs:
		pair.glyph.queue_free()
		pair.label.queue_free()
	_pairs.clear()

	for resource_type in GameState.resource_types():
		var amount: int = int(costs.get(resource_type, 0))
		if amount <= 0:
			continue
		var glyph := ResourceGlyph.new()
		glyph.resource_type = String(resource_type)
		glyph.mouse_filter = Control.MOUSE_FILTER_IGNORE
		add_child(glyph)
		var label := Label.new()
		label.text = str(amount)
		label.mouse_filter = Control.MOUSE_FILTER_IGNORE
		label.add_theme_font_size_override("font_size", FONT_SIZE)
		label.add_theme_color_override("font_color", GameState.resource_color(resource_type))
		label.add_theme_color_override("font_outline_color", Color(0.01, 0.01, 0.035, 0.95))
		label.add_theme_constant_override("outline_size", 2)
		label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
		add_child(label)
		_pairs.append({"glyph": glyph, "label": label, "width": _text_width(label)})
	_layout()


func _text_width(label: Label) -> float:
	var font: Font = label.get_theme_font("font")
	if font == null:
		return 20.0
	return font.get_string_size(label.text, HORIZONTAL_ALIGNMENT_LEFT, -1.0,
		FONT_SIZE).x


func _layout() -> void:
	# Centred as a block: a one-resource price and a two-resource price
	# should both sit under the middle of the button they belong to.
	var total: float = 0.0
	for pair in _pairs:
		total += GLYPH_SIZE + GAP + float(pair.width) + PAIR_GAP
	total = maxf(total - PAIR_GAP, 0.0)
	var x: float = (size.x - total) * 0.5
	var mid: float = (size.y - GLYPH_SIZE) * 0.5
	for pair in _pairs:
		pair.glyph.position = Vector2(x, mid)
		pair.glyph.size = Vector2(GLYPH_SIZE, GLYPH_SIZE)
		x += GLYPH_SIZE + GAP
		pair.label.position = Vector2(x, 0.0)
		pair.label.size = Vector2(float(pair.width), size.y)
		x += float(pair.width) + PAIR_GAP


func is_free() -> bool:
	return _pairs.is_empty()