extends Node3D
class_name Cabinet

## A filing cabinet you actually have to open.
##
## Destruction here is deliberately GRANULAR. You can't one-shot a cabinet and have its
## contents evaporate: you pull a drawer, the drawer slides out and becomes its own rigid
## body, and the folders inside become individual smashables you deal with one at a time
## — unless you find the level's shredder, which eats a whole drawer at once.
##
## Every cabinet carries a visible alphabetical range on a Label3D. That label is the
## entire search mechanic: the Gauntlet tells you a client's NAME, never a cabinet, and
## working out that HENDERSON lives in F–J is the puzzle.
##
## Godot 4.7 GDScript 2.0.

const CARCASS := "res://assets/store/cabinet-carcass.glb"
const DRAWER := "res://assets/store/cabinet-drawer.glb"
const FOLDER := "res://assets/store/file-folder.glb"

const DRAWERS := 4
const DRAWER_Y := [0.10, 0.42, 0.74, 1.06]   # sill heights up the carcass
const OPEN_BY := 0.44                        # how far a drawer slides out
const FILES_PER_DRAWER := 4

var label_range := "A–E"
var is_target := false

var drawers: Array[Smashable] = []
var _open: Array[bool] = []
var _slide: Array[float] = []                # 0 closed, 1 fully out
var _files_of: Array = []                    # per drawer: Array[Smashable]
var _file_offsets: Array = []                # per drawer: Array[Vector3] in cabinet space
var _label: Label3D

signal drawer_opened(cab: Cabinet, index: int)

## `host` is the node smashables should live under (Main's World).
func setup(host: Node3D, pos: Vector3, yaw: float, range_text: String,
		wire: Callable) -> void:
	label_range = range_text
	host.add_child(self)
	position = pos
	rotation.y = yaw

	var carcass := Smashable.new()
	carcass.name = "cabinet"
	carcass.kind = "steel"
	carcass.start_frozen = true                # it holds the drawers up
	carcass.mass = 60.0
	_mount(carcass, CARCASS)
	add_child(carcass)
	carcass.transform = Transform3D.IDENTITY
	wire.call(carcass)

	for i in DRAWERS:
		var d := Smashable.new()
		d.name = "drawer%d" % i
		d.kind = "steel"
		d.start_frozen = true                  # frozen until it's been pulled fully out
		d.mass = 12.0
		_mount(d, DRAWER)
		host.add_child(d)
		d.global_transform = global_transform * Transform3D(Basis.IDENTITY,
			Vector3(0.0, DRAWER_Y[i], 0.0))
		wire.call(d)
		drawers.append(d)
		_open.append(false)
		_slide.append(0.0)
		carcass.supports.append(d)

		var fs: Array[Smashable] = []
		var offs: Array = []
		for f in FILES_PER_DRAWER:
			var file := Smashable.new()
			file.name = "file"
			file.kind = "paper"
			file.start_frozen = true
			file.mass = 0.4
			_mount(file, FOLDER)
			host.add_child(file)
			var off := Vector3(0.0, DRAWER_Y[i] + 0.06 + f * 0.026, 0.0)
			file.global_transform = global_transform * Transform3D(Basis.IDENTITY, off)
			wire.call(file)
			fs.append(file)
			offs.append(off)
		_files_of.append(fs)
		_file_offsets.append(offs)

	# the label IS the search mechanic
	_label = Label3D.new()
	_label.text = label_range
	_label.font_size = 96
	_label.pixel_size = 0.0012
	_label.modulate = Color(0.10, 0.10, 0.12)
	_label.outline_size = 0
	_label.billboard = BaseMaterial3D.BILLBOARD_DISABLED
	_label.no_depth_test = false
	add_child(_label)
	_label.position = Vector3(0.0, 1.20, -0.315)
	_label.rotation.y = PI

func _mount(body: Smashable, path: String) -> void:
	if not ResourceLoader.exists(path):
		return
	var packed := load(path) as PackedScene
	if packed == null:
		return
	var vis: Node3D = packed.instantiate()
	body.add_child(vis)
	var ab := Floorplan.mesh_aabb(vis)
	if ab.size == Vector3.ZERO:
		ab = AABB(Vector3(-0.2, 0.0, -0.2), Vector3(0.4, 0.4, 0.4))
	var col := CollisionShape3D.new()
	var sh := BoxShape3D.new()
	sh.size = ab.size
	col.shape = sh
	col.position = ab.get_center()
	body.add_child(col)
	body.set_meta("spawn_pos", Vector3.ZERO)

# ---------------------------------------------------------------- interaction
## Index of the drawer nearest `from` that's still closed, or -1.
func nearest_closed(from: Vector3, reach: float) -> int:
	var best := reach * reach
	var idx := -1
	for i in DRAWERS:
		if _open[i] or not is_instance_valid(drawers[i]):
			continue
		var d: float = (drawers[i].global_position - from).length_squared()
		if d < best:
			best = d
			idx = i
	return idx

func open(i: int) -> void:
	if i < 0 or i >= DRAWERS or _open[i]:
		return
	_open[i] = true
	drawer_opened.emit(self, i)

func is_open(i: int) -> bool:
	return i >= 0 and i < DRAWERS and _open[i]

## Files still intact across the whole cabinet.
func files_remaining() -> int:
	var n := 0
	for fs in _files_of:
		for f in fs:
			if is_instance_valid(f):
				n += 1
	return n

func files_total() -> int:
	return DRAWERS * FILES_PER_DRAWER

## Every file in one drawer, for the shredder to eat in a single go.
func drawer_files(i: int) -> Array:
	if i < 0 or i >= _files_of.size():
		return []
	return _files_of[i]

# ---------------------------------------------------------------- per-frame
## Drawers slide on a spring toward open, and their folders ride with them until the
## drawer is fully out — at which point the folders go live and can be destroyed.
func _physics_process(dt: float) -> void:
	for i in DRAWERS:
		var want := 1.0 if _open[i] else 0.0
		if is_equal_approx(_slide[i], want):
			continue
		_slide[i] = move_toward(_slide[i], want, dt * 1.8)
		var out := -OPEN_BY * _slide[i]        # -Z is the cabinet front
		var d: Smashable = drawers[i]
		if is_instance_valid(d) and d.freeze:
			d.global_transform = global_transform * Transform3D(Basis.IDENTITY,
				Vector3(0.0, DRAWER_Y[i], out))
		var fs: Array = _files_of[i]
		var offs: Array = _file_offsets[i]
		for j in fs.size():
			var f: Smashable = fs[j]
			if not is_instance_valid(f) or not f.freeze:
				continue
			var o: Vector3 = offs[j]
			f.global_transform = global_transform * Transform3D(Basis.IDENTITY,
				Vector3(o.x, o.y, o.z + out))
		if _slide[i] >= 1.0:
			_release(i)

## Fully open: the drawer and its folders become live physics, so they can be pulled
## out, tipped over, and destroyed piece by piece.
func _release(i: int) -> void:
	var d: Smashable = drawers[i]
	if is_instance_valid(d):
		d.release()
	for f in _files_of[i]:
		if is_instance_valid(f):
			(f as Smashable).release()