class_name ResourceReadout
extends Control

# Generalizes ResourceCounter/GasCounter/CargoCounter/GasCargoCounter - one
# hardcoded node plus one script per resource, times two scenes - into one
# row per GameState.resource_types() entry, built at _ready(). A new
# resource added to ResourceDefinitions.ORDER/DEFINITIONS gets a HUD row
# with no scene edit and no new script, the same way ResourceBar and
# ResourceTransferList already pick up a new resource automatically.
#
# Layout mirrors what it replaces: a BANKED column (left) and a FLEET HOLD
# column (right), one row per resource, each row a resource glyph plus a
# digit readout. Banked rows are always visible, even at zero (matching
# ResourceCounter/GasCounter today); fleet rows hide at zero, since that
# hold isn't the player's yet (see CargoCounter's own note on why).

const FLEET_GLOW: Color = Color(1.0, 0.78, 0.25)
const FLEET_CORE: Color = Color(0.22, 0.12, 0.0)

const ROW_HEIGHT: float = 58.0
const COLUMN_GAP: float = 328.0
const GLYPH_GAP: float = 8.0

@export var digit_height: float = 38.0
# The bright rocky/gas surfaces need a darker banked glow than deep space
# for the same contrast reason PlanetSurface.tscn's old ResourceCounter
# node overrode its colour - set true on the surface-scene instance only.
@export var bright_background: bool = false

var _banked_numbers: Dictionary = {}
var _fleet_numbers: Dictionary = {}

# #56: the fleet hold now has a finite total capacity. Rather than a new
# node, this reuses the existing "FLEET HOLD" caption Label that both Main
# and PlanetSurface already place as a sibling - get_node_or_null so a
# scene that happens to embed ResourceReadout without that sibling (none
# does today) degrades to just not showing a limit, instead of erroring.
@onready var _fleet_caption: Label = get_node_or_null("../FleetCaption")
var _fleet_caption_base_text: String = ""


func _ready() -> void:
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	if _fleet_caption != null:
		_fleet_caption_base_text = _fleet_caption.text
	var y: float = 0.0
	for resource_type in GameState.resource_types():
		var banked_color: Color = GameState.resource_color(resource_type)
		if bright_background:
			banked_color = banked_color.darkened(0.4)

		_add_glyph(resource_type, Vector2(0.0, y))
		var banked: NeonNumber = _add_number(Vector2(digit_height + GLYPH_GAP, y),
			banked_color, banked_color.darkened(0.8))
		_banked_numbers[resource_type] = banked

		_add_glyph(resource_type, Vector2(COLUMN_GAP, y))
		var fleet: NeonNumber = _add_number(Vector2(COLUMN_GAP + digit_height + GLYPH_GAP, y),
			FLEET_GLOW, FLEET_CORE)
		_fleet_numbers[resource_type] = fleet

		y += ROW_HEIGHT

	# Stop understating our own extent. The rows are drawn by child nodes,
	# which happily paint outside this Control's rect, so the scene-authored
	# height stayed at its original guess no matter how many rows appeared.
	size.y = rows_height()


# How tall the rows are, derived from the live resource list rather than from
# whatever _ready() happened to have built. That matters: _ready() runs in
# scene-tree order, so a sibling laying itself out relative to this readout
# (BuildController._seat_hud_columns) can legitimately ask BEFORE this node
# has built anything, and a cached height would answer zero.
func rows_height() -> float:
	return float(GameState.resource_types().size()) * ROW_HEIGHT


# Bottom edge of the rows in this Control's parent space - the line anything
# stacked below the readout has to clear.
func content_bottom() -> float:
	return position.y + rows_height()


func _add_glyph(resource_type: String, at: Vector2) -> void:
	var glyph: ResourceGlyph = ResourceGlyph.new()
	glyph.resource_type = resource_type
	glyph.position = at
	glyph.size = Vector2(digit_height, digit_height)
	add_child(glyph)


func _add_number(at: Vector2, glow: Color, core: Color) -> NeonNumber:
	var number: NeonNumber = NeonNumber.new()
	number.show_icon = false
	number.position = at
	number.size = Vector2(0.0, digit_height)
	number.glow_color = glow
	number.core_color = core
	number.digit_height = digit_height
	add_child(number)
	return number


func banked_number(resource_type: String) -> NeonNumber:
	return _banked_numbers.get(resource_type)


func fleet_number(resource_type: String) -> NeonNumber:
	return _fleet_numbers.get(resource_type)


func _process(_delta: float) -> void:
	if _fleet_caption != null:
		var capacity: int = GameState.fleet_cargo_total_capacity()
		_fleet_caption.text = "%s %d/%d" % [_fleet_caption_base_text, GameState.fleet_cargo_used(), capacity] \
			if capacity >= 0 else _fleet_caption_base_text

	for resource_type in GameState.resource_types():
		var banked: NeonNumber = _banked_numbers.get(resource_type)
		if banked != null:
			banked.set_amount(GameState.banked_resource(resource_type))

		var fleet: NeonNumber = _fleet_numbers.get(resource_type)
		if fleet == null:
			continue
		var held: int = GameState.fleet_resource(resource_type)
		fleet.visible = held > 0
		if fleet.visible:
			fleet.set_amount(held)