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

signal craft_requested(vessel_type: String)
signal queue_cancel_requested(index: int)

const VESSEL_DEFINITIONS = preload("res://vessels/VesselDefinitions.gd")
const MENU_LAYOUT = preload("res://ui/menus/MenuLayout.gd")
const PRICE_TAG = preload("res://ui/PriceTag.gd")
const COLUMNS := 3
const ROW_PITCH := 260.0
const COLUMN_X := 190.0
const BUTTON_HALF := 56.0
const BUTTON_HEIGHT := 100.0
const LABEL_HALF := 92.0
const LABEL_HEIGHT := 44.0
const LABEL_OFFSET := 106.0
const PRICE_HALF := 92.0
const PRICE_HEIGHT := 86.0
const PRICE_OFFSET := 154.0

@onready var status: Label = $StatusLabel
@onready var queue_detail: Label = $QueueDetail
@onready var resource_bar: Control = $Bar
# #216 added the two support craft at the end, in the order
# VESSEL_DEFINITIONS.craftable() returns them - fleet hulls first, so none of
# the rows above moved.
@onready var vessel_buttons: Array = [$InterceptorButton, $ShieldButton,
	$GasBomberButton, $CarrierButton, $LaserButton, $DistorderButton,
	$TransporterButton, $RepairDroneButton]
@onready var vessel_labels: Array = [$InterceptorLabel, $ShieldLabel,
	$GasBomberLabel, $CarrierLabel, $LaserLabel, $DistorderLabel,
	$TransporterLabel, $RepairDroneLabel]
@onready var queue_slots: Array = [$QueueSlot0, $QueueSlot1, $QueueSlot2, $QueueSlot3]

var building_id: int = 0
# Which vessel each visible slot is offering, in order. Empty slots are hidden.
var shown_types: PackedStringArray = PackedStringArray()
var message: String = ""
var message_until: int = 0
var price_tags: Array = []


func _ready() -> void:
	super._ready()
	_build_price_tags()
	# Bound to the SLOT, not to a definition: which vessel sits in slot i
	# changes as things become available, so a handler that captured one at
	# startup would order the wrong hull the moment the list shortened.
	for i in range(vessel_buttons.size()):
		vessel_buttons[i].pressed.connect(func(): _on_vessel_pressed(i))
	for i in range(queue_slots.size()):
		queue_slots[i].pressed.connect(func(): queue_cancel_requested.emit(i))
	_layout_entries()


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


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


func say(next_message: String) -> void:
	message = next_message
	message_until = Time.get_ticks_msec() + 3000
	refresh()


func refresh() -> void:
	status.text = ""
	# Only what can actually be ordered here today: a hull whose research is
	# done, and - for the support craft - one with somewhere to be assigned.
	# Hidden rather than greyed, the way the build menu treats a structure
	# that has not been researched; a row nobody can press is clutter that
	# says nothing the absence does not.
	shown_types.clear()
	for definition in VESSEL_DEFINITIONS.craftable():
		if GameState.vessel_can_be_crafted(String(definition.definition_id)):
			shown_types.append(String(definition.definition_id))

	for i in range(vessel_buttons.size()):
		var on_offer: bool = i < shown_types.size()
		vessel_buttons[i].visible = on_offer
		vessel_labels[i].visible = on_offer
		if i < price_tags.size():
			price_tags[i].visible = on_offer
		if not on_offer:
			continue
		var definition: Resource = VESSEL_DEFINITIONS.get_definition(String(shown_types[i]))
		var button: Control = vessel_buttons[i]
		vessel_labels[i].text = String(definition.display_name)
		if i < price_tags.size():
			price_tags[i].set_costs(GameState.product_costs(definition.definition_id))
		button.icon = definition.icon
		button.glow_color = definition.glow_color
		button.enabled = true
		button.queue_redraw()
	_layout_entries()
	refresh_queue()
	if message != "":
		if Time.get_ticks_msec() < message_until:
			status.text = "%s\n%s" % [message, status.text]
		else:
			message = ""


func refresh_queue() -> void:
	var orders: Array = GameState.order_list(building_id)
	for i in range(queue_slots.size()):
		var slot: Control = queue_slots[i]
		slot.visible = i < orders.size()
		if not slot.visible:
			continue
		var order: Dictionary = orders[i]
		var definition: Resource = VESSEL_DEFINITIONS.get_definition(String(order.product))
		slot.icon = definition.icon
		slot.glow_color = vessel_colour(String(order.product))
		slot.enabled = bool(order.started)
		slot.queue_redraw()
	if orders.is_empty():
		queue_detail.text = "Nothing queued"
		return
	var head: Dictionary = orders[0]
	if bool(head.started):
		queue_detail.text = "Building %s  %d%%\nTap to cancel" % [
			GameState.vessel_name(String(head.product)),
			int(round(float(head.progress) * 100.0))]
	else:
		queue_detail.text = "%s waiting for resources\nTap to cancel" \
			% GameState.vessel_name(String(head.product))


func vessel_colour(vessel_type: String) -> Color:
	var definition: Resource = VESSEL_DEFINITIONS.get_definition(vessel_type)
	return definition.glow_color if definition != null else Color(0.25, 0.85, 1.0)


func _build_price_tags() -> void:
	for i in range(vessel_buttons.size()):
		var tag: Control = PRICE_TAG.new()
		tag.name = "CraftPrice%d" % i
		tag.set_anchors_preset(Control.PRESET_CENTER)
		add_child(tag)
		price_tags.append(tag)


func row_height() -> float:
	return PRICE_OFFSET + PRICE_HEIGHT


func _on_vessel_pressed(slot: int) -> void:
	if slot < 0 or slot >= shown_types.size():
		return
	craft_requested.emit(String(shown_types[slot]))


func _layout_entries() -> void:
	# Laid out over what is ON OFFER, so a short list is centred and packed
	# rather than leaving holes where a hidden hull used to be.
	var offered: int = maxi(shown_types.size(), 1)
	var rows: int = maxi(int(ceil(float(offered) / float(COLUMNS))), 1)
	var band: Vector2 = MENU_LAYOUT.grid_band(status.offset_bottom, size.y)
	for i in range(vessel_buttons.size()):
		var row: int = i / COLUMNS
		var column: int = i % COLUMNS
		var cx: float = (float(column) - 1.0) * COLUMN_X
		var top: float = MENU_LAYOUT.grid_row_top(row, rows, row_height(), band, ROW_PITCH)
		MENU_LAYOUT.place_entry(vessel_buttons[i], cx, top, BUTTON_HALF, BUTTON_HEIGHT)
		MENU_LAYOUT.place_entry(vessel_labels[i], cx, top + LABEL_OFFSET,
			LABEL_HALF, LABEL_HEIGHT)
		if i < price_tags.size():
			MENU_LAYOUT.place_entry(price_tags[i], cx, top + PRICE_OFFSET,
				PRICE_HALF, PRICE_HEIGHT)