extends Control

# #103 (#97e): "A dedicated menu on each outpost should let you compose how
# you want the outpost to be filled."
#
# Builds its own rows from GameState.garrison_vessel_types() rather than
# from nodes placed in Main.tscn. Which vessels can hold a position is
# decided by capability, not by a list of types, so the day an armed vessel
# is added it gets a row here and an unarmed one never does by accident -
# and neither change touches the scene.
#
# The panel edits the ORDER, not the crew. What the player sets here is what
# they want stationed; #104 is what actually gets vessels there. The two are
# shown side by side ("1/2") so an outpost that is waiting on a hull it does
# not have yet reads as waiting rather than as broken.

# Emitted when the player changes the order, so whatever hosts the panel can
# update its own readout rather than polling.
signal changed

const ROW_HEIGHT: float = 96.0
const ROW_GAP: float = 12.0
const BUTTON_SIZE: float = 76.0
const NAME_FONT_SIZE: int = 30
const COUNT_FONT_SIZE: int = 34
const HEADER_FONT_SIZE: int = 22

var building_id: int = 0

var _rows: Array = []
var _capacity_label: Label


func _ready() -> void:
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	# _make_label already parents what it builds.
	_capacity_label = _make_label("", HEADER_FONT_SIZE, Color(0.62, 0.78, 0.86))
	_capacity_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER

	for vessel_type in GameState.garrison_vessel_types():
		var row: Dictionary = _make_row(vessel_type)
		_rows.append(row)
	resized.connect(_layout)
	_layout()


func _make_label(text_value: String, font_size: int, colour: Color) -> Label:
	var label := Label.new()
	label.text = text_value
	label.mouse_filter = Control.MOUSE_FILTER_IGNORE
	label.add_theme_font_size_override("font_size", font_size)
	label.add_theme_color_override("font_color", colour)
	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)
	return label


func _make_row(vessel_type: String) -> Dictionary:
	var definition: Resource = GameState.vessel_definition(vessel_type)
	var colour: Color = definition.glow_color if definition != null else Color.WHITE

	var name_label: Label = _make_label(GameState.vessel_name(vessel_type), NAME_FONT_SIZE, colour)
	var count_label: Label = _make_label("0", COUNT_FONT_SIZE, Color(0.94, 0.98, 1.0))
	count_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER

	var minus := IconButton.new()
	minus.icon = IconButton.Icon.MINUS
	minus.glow_color = colour
	minus.pressed.connect(_on_adjust.bind(vessel_type, -1))
	add_child(minus)

	var plus := IconButton.new()
	plus.icon = IconButton.Icon.PLUS
	plus.glow_color = colour
	plus.pressed.connect(_on_adjust.bind(vessel_type, 1))
	add_child(plus)

	return {"type": vessel_type, "name": name_label, "count": count_label,
		"minus": minus, "plus": plus}


func _on_adjust(vessel_type: String, delta: int) -> void:
	if building_id == 0:
		return
	GameState.adjust_garrison_desired(building_id, vessel_type, delta)
	refresh()
	changed.emit()


func _layout() -> void:
	if _rows.is_empty():
		return
	_capacity_label.position = Vector2.ZERO
	_capacity_label.size = Vector2(size.x, 44.0)
	var y: float = 52.0
	for row in _rows:
		row.name.position = Vector2(0.0, y)
		row.name.size = Vector2(size.x * 0.46, ROW_HEIGHT)
		var right: float = size.x
		row.plus.position = Vector2(right - BUTTON_SIZE, y + (ROW_HEIGHT - BUTTON_SIZE) * 0.5)
		row.plus.size = Vector2(BUTTON_SIZE, BUTTON_SIZE)
		row.count.position = Vector2(right - BUTTON_SIZE * 3.0, y)
		row.count.size = Vector2(BUTTON_SIZE * 2.0, ROW_HEIGHT)
		row.minus.position = Vector2(right - BUTTON_SIZE * 4.0,
			y + (ROW_HEIGHT - BUTTON_SIZE) * 0.5)
		row.minus.size = Vector2(BUTTON_SIZE, BUTTON_SIZE)
		y += ROW_HEIGHT + ROW_GAP


func natural_height() -> float:
	return 52.0 + float(_rows.size()) * (ROW_HEIGHT + ROW_GAP)


func refresh() -> void:
	if _rows.is_empty():
		return
	var capacity: int = GameState.outpost_slot_capacity()
	var ordered: int = GameState.garrison_desired_total(building_id)
	_capacity_label.text = "BERTHS  %d / %d" % [ordered, capacity]
	for row in _rows:
		var vessel_type: String = String(row.type)
		var want: int = GameState.garrison_desired_of(building_id, vessel_type)
		var here: int = GameState.garrison_crew_of(building_id, vessel_type)
		# "here / ordered", so an outpost waiting on a hull nobody has built
		# yet reads as waiting rather than as having lost one.
		row.count.text = "%d/%d" % [here, want]
		var unlocked: bool = GameState.vessel_is_unlocked(vessel_type)
		row.name.modulate.a = 1.0 if unlocked else 0.45
		row.minus.enabled = unlocked and want > 0
		row.plus.enabled = unlocked and ordered < capacity
		row.minus.queue_redraw()
		row.plus.queue_redraw()