extends "res://ui/menus/ModalMenu.gd"

# Forgejo #220: what the fleet costs to keep, and WHY it costs that.
#
# A Fleet Office charges for the vessel in its berth every 25 seconds, and
# each berth costs more than the one before it. Neither of those is visible
# from the resource bar - the player watches a number fall and cannot tell
# which of their own decisions is draining it - so this states the bill and
# shows the arithmetic that produced it, line by line.
#
# Every number here comes from GameState.fleet_upkeep_breakdown(), which is
# the same calculation the charging loop runs. A readout that did its own sum
# could disagree with what is actually being taken, which is exactly the kind
# of "the game is lying to me" the ticket is about.

@onready var total_label: Label = $TotalLabel
@onready var detail_label: Label = $DetailLabel
@onready var formula_label: Label = $FormulaLabel

var building_id: int = 0


func open_for(next_building_id: int) -> void:
	building_id = next_building_id
	open_menu()
	refresh()


func close_menu() -> void:
	super.close_menu()
	building_id = 0


func refresh() -> void:
	if not visible:
		return
	var breakdown: Dictionary = GameState.fleet_upkeep_breakdown()
	var berths: Array = breakdown.berths
	var per_minute: Dictionary = breakdown.per_minute

	if per_minute.is_empty():
		total_label.text = "NOTHING TO KEEP"
	else:
		var parts: PackedStringArray = PackedStringArray()
		for resource_type in per_minute:
			parts.append("%.1f %s" % [float(per_minute[resource_type]),
				GameState.resource_name(String(resource_type)).to_lower()])
		total_label.text = "%s PER MINUTE" % " · ".join(parts)

	# One line per paying berth: which hull, what it is charged, and the
	# multiplier that got it there. An empty berth is charged nothing and is
	# left out rather than listed at zero.
	var lines: PackedStringArray = PackedStringArray()
	for berth in berths:
		var costs: PackedStringArray = PackedStringArray()
		for resource_type in berth.costs:
			costs.append("%d %s" % [int(berth.costs[resource_type]),
				GameState.resource_name(String(resource_type)).to_lower()])
		lines.append("BERTH %d  %-16s %s  (x%.2f)%s" % [
			int(berth.slot), GameState.vessel_name(String(berth.vessel_type)),
			" ".join(costs), float(berth.scale),
			"  — UNPAID" if bool(berth.starved) else "",
		])
	detail_label.text = "\n".join(lines) if not lines.is_empty() \
		else "No berth is being charged. Build a Fleet Office and put a vessel in it."

	formula_label.text = ("Each berth is charged every %ds: the vessel's build price "
		+ "divided by %d, then multiplied by %.2f for every berth past the first "
		+ "paid one. The first vessel is free.") % [
			int(breakdown.charge_seconds), int(breakdown.divisor),
			float(breakdown.growth)]