class_name StaticObjectNode
extends Node3D
## A visual representation of a static world object within a chunk.
##
## This node is instantiated by [ChunkScene] for each static (non-dynamic)
## [WorldObject]. It renders the object's mesh (referenced by `asset_id`) at
## the object's transform. If the asset is not yet loaded, a placeholder mesh
## is shown.
##
## ## Structure
##
## ```
## StaticObjectNode (Node3D)
##  └── MeshInstance3D  # the object's visual mesh
## ```

## The world object data this node represents.
var world_object: WorldObject = null

## The loaded mesh instance (or placeholder).
var _mesh_instance: MeshInstance3D = null


func _ready() -> void:
	if world_object == null:
		return
	_load_mesh()


## Load and attach the object's mesh.
func _load_mesh() -> void:
	# 1. Try to load the asset directly if it exists on disk
	var asset_node := _try_load_asset(world_object.asset_id)
	if asset_node != null:
		add_child(asset_node)
		if asset_node is MeshInstance3D:
			_mesh_instance = asset_node as MeshInstance3D
		return

	# 2. Build a stylized, recognizable 3D representation based on catalog ID / asset ID
	var cat_id := _get_catalog_id()
	_build_procedural_object(cat_id)


func _get_catalog_id() -> String:
	if world_object == null:
		return ""
	if world_object.properties is Dictionary and world_object.properties.has("catalog_id"):
		return str(world_object.properties["catalog_id"]).to_lower()
	return world_object.asset_id.get_file().get_basename().to_lower()


func _try_load_asset(asset_id: String) -> Node:
	if asset_id.is_empty():
		return null
	var path := "res://assets/%s" % asset_id
	if ResourceLoader.exists(path):
		var res := load(path)
		if res is PackedScene:
			return (res as PackedScene).instantiate()
		elif res is Mesh:
			var mi := MeshInstance3D.new()
			mi.name = "mesh"
			mi.mesh = res as Mesh
			return mi
	return null


func _build_procedural_object(cat_id: String) -> void:
	var container := Node3D.new()
	container.name = "visuals"
	add_child(container)

	if "lamp" in cat_id:
		# Lamp post: dark iron vertical pole + glowing lantern + omni light
		var pole := MeshInstance3D.new()
		pole.name = "pole"
		var pole_mesh := CylinderMesh.new()
		pole_mesh.height = 3.2
		pole_mesh.top_radius = 0.07
		pole_mesh.bottom_radius = 0.1
		var iron_mat := StandardMaterial3D.new()
		iron_mat.albedo_color = Color(0.2, 0.22, 0.25)
		iron_mat.metallic = 0.85
		iron_mat.roughness = 0.35
		pole_mesh.material = iron_mat
		pole.mesh = pole_mesh
		pole.position = Vector3(0, 1.6, 0)
		container.add_child(pole)
		_mesh_instance = pole

		var cap := MeshInstance3D.new()
		cap.name = "cap"
		var cap_mesh := CylinderMesh.new()
		cap_mesh.height = 0.15
		cap_mesh.top_radius = 0.05
		cap_mesh.bottom_radius = 0.3
		cap_mesh.material = iron_mat
		cap.mesh = cap_mesh
		cap.position = Vector3(0, 3.2, 0)
		container.add_child(cap)

		var lantern := MeshInstance3D.new()
		lantern.name = "lantern"
		var lantern_mesh := BoxMesh.new()
		lantern_mesh.size = Vector3(0.32, 0.45, 0.32)
		var glow_mat := StandardMaterial3D.new()
		glow_mat.albedo_color = Color(1.0, 0.95, 0.7)
		glow_mat.emission_enabled = true
		glow_mat.emission = Color(1.0, 0.9, 0.4)
		glow_mat.emission_energy_multiplier = 4.0
		lantern_mesh.material = glow_mat
		lantern.mesh = lantern_mesh
		lantern.position = Vector3(0, 2.9, 0)
		container.add_child(lantern)

		var light := OmniLight3D.new()
		light.name = "light"
		light.light_color = Color(1.0, 0.93, 0.72)
		light.light_energy = 1.6
		light.omni_range = 10.0
		light.position = Vector3(0, 2.9, 0)
		container.add_child(light)

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var cyl := CylinderShape3D.new()
		cyl.height = 3.2
		cyl.radius = 0.2
		col_shape.shape = cyl
		col_shape.position = Vector3(0, 1.6, 0)
		col.add_child(col_shape)
		container.add_child(col)

	elif "crate" in cat_id:
		var crate := MeshInstance3D.new()
		crate.name = "crate"
		var crate_mesh := BoxMesh.new()
		crate_mesh.size = Vector3(1.0, 1.0, 1.0)
		var wood_mat := StandardMaterial3D.new()
		wood_mat.albedo_color = Color(0.55, 0.36, 0.18)
		wood_mat.roughness = 0.8
		crate_mesh.material = wood_mat
		crate.mesh = crate_mesh
		crate.position = Vector3(0, 0.5, 0)
		container.add_child(crate)
		_mesh_instance = crate

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var box := BoxShape3D.new()
		box.size = Vector3(1.0, 1.0, 1.0)
		col_shape.shape = box
		col_shape.position = Vector3(0, 0.5, 0)
		col.add_child(col_shape)
		container.add_child(col)

	elif "rock" in cat_id:
		var rock := MeshInstance3D.new()
		rock.name = "rock"
		var rock_mesh := SphereMesh.new()
		rock_mesh.radius = 0.65
		rock_mesh.height = 1.0
		rock_mesh.radial_segments = 8
		rock_mesh.rings = 6
		var stone_mat := StandardMaterial3D.new()
		stone_mat.albedo_color = Color(0.42, 0.44, 0.46)
		stone_mat.roughness = 0.9
		rock_mesh.material = stone_mat
		rock.mesh = rock_mesh
		rock.position = Vector3(0, 0.5, 0)
		container.add_child(rock)
		_mesh_instance = rock

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var sphere := SphereShape3D.new()
		sphere.radius = 0.65
		col_shape.shape = sphere
		col_shape.position = Vector3(0, 0.5, 0)
		col.add_child(col_shape)
		container.add_child(col)

	elif "tree" in cat_id:
		var trunk := MeshInstance3D.new()
		trunk.name = "trunk"
		var trunk_mesh := CylinderMesh.new()
		trunk_mesh.height = 1.4
		trunk_mesh.top_radius = 0.2
		trunk_mesh.bottom_radius = 0.25
		var bark_mat := StandardMaterial3D.new()
		bark_mat.albedo_color = Color(0.35, 0.22, 0.12)
		trunk_mesh.material = bark_mat
		trunk.mesh = trunk_mesh
		trunk.position = Vector3(0, 0.7, 0)
		container.add_child(trunk)

		var leaves1 := MeshInstance3D.new()
		leaves1.name = "leaves1"
		var leaves1_mesh := CylinderMesh.new()
		leaves1_mesh.height = 2.0
		leaves1_mesh.top_radius = 0.1
		leaves1_mesh.bottom_radius = 1.4
		var leaves_mat := StandardMaterial3D.new()
		leaves_mat.albedo_color = Color(0.12, 0.38, 0.15)
		leaves1_mesh.material = leaves_mat
		leaves1.mesh = leaves1_mesh
		leaves1.position = Vector3(0, 2.0, 0)
		container.add_child(leaves1)
		_mesh_instance = leaves1

		var leaves2 := MeshInstance3D.new()
		leaves2.name = "leaves2"
		var leaves2_mesh := CylinderMesh.new()
		leaves2_mesh.height = 1.6
		leaves2_mesh.top_radius = 0.0
		leaves2_mesh.bottom_radius = 0.9
		leaves2_mesh.material = leaves_mat
		leaves2.mesh = leaves2_mesh
		leaves2.position = Vector3(0, 3.2, 0)
		container.add_child(leaves2)

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var cyl := CylinderShape3D.new()
		cyl.height = 4.0
		cyl.radius = 0.35
		col_shape.shape = cyl
		col_shape.position = Vector3(0, 2.0, 0)
		col.add_child(col_shape)
		container.add_child(col)

	elif "chest" in cat_id:
		var chest := MeshInstance3D.new()
		chest.name = "chest"
		var chest_mesh := BoxMesh.new()
		chest_mesh.size = Vector3(1.0, 0.8, 0.6)
		var chest_mat := StandardMaterial3D.new()
		chest_mat.albedo_color = Color(0.48, 0.26, 0.12)
		chest_mesh.material = chest_mat
		chest.mesh = chest_mesh
		chest.position = Vector3(0, 0.4, 0)
		container.add_child(chest)
		_mesh_instance = chest

		var trim := MeshInstance3D.new()
		trim.name = "trim"
		var trim_mesh := BoxMesh.new()
		trim_mesh.size = Vector3(0.2, 0.25, 0.64)
		var gold_mat := StandardMaterial3D.new()
		gold_mat.albedo_color = Color(0.9, 0.75, 0.2)
		trim_mesh.material = gold_mat
		trim.mesh = trim_mesh
		trim.position = Vector3(0, 0.4, 0)
		container.add_child(trim)

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var box := BoxShape3D.new()
		box.size = Vector3(1.0, 0.8, 0.6)
		col_shape.shape = box
		col_shape.position = Vector3(0, 0.4, 0)
		col.add_child(col_shape)
		container.add_child(col)

	elif "spawn" in cat_id or (world_object != null and world_object.type == "spawn_point"):
		var pad := MeshInstance3D.new()
		pad.name = "pad"
		var pad_mesh := CylinderMesh.new()
		pad_mesh.height = 0.08
		pad_mesh.top_radius = 1.2
		pad_mesh.bottom_radius = 1.2
		var spawn_mat := StandardMaterial3D.new()
		spawn_mat.albedo_color = Color(0.2, 0.75, 0.95)
		spawn_mat.emission_enabled = true
		spawn_mat.emission = Color(0.1, 0.6, 0.85)
		spawn_mat.emission_energy_multiplier = 2.0
		pad_mesh.material = spawn_mat
		pad.mesh = pad_mesh
		pad.position = Vector3(0, 0.04, 0)
		container.add_child(pad)
		_mesh_instance = pad

	else:
		var mi := MeshInstance3D.new()
		mi.name = "mesh"
		mi.mesh = _make_placeholder_mesh()
		mi.position = Vector3(0, 0.5, 0)
		container.add_child(mi)
		_mesh_instance = mi

		var col := _create_static_collision()
		var col_shape := CollisionShape3D.new()
		var box := BoxShape3D.new()
		box.size = Vector3(1.0, 1.0, 1.0)
		col_shape.shape = box
		col_shape.position = Vector3(0, 0.5, 0)
		col.add_child(col_shape)
		container.add_child(col)


func _create_static_collision() -> StaticBody3D:
	var sb := StaticBody3D.new()
	sb.name = "collision"
	sb.set_collision_layer_value(1, true)
	sb.set_collision_mask_value(1, true)
	return sb


## Attempt to load a mesh from the asset path.
func _load_asset_mesh(asset_id: String) -> Mesh:
	if asset_id.is_empty():
		return null
	var path := "res://assets/%s" % asset_id
	if ResourceLoader.exists(path):
		var res := load(path)
		if res is Mesh:
			return res as Mesh
	return null


## Create a simple placeholder box mesh when the real asset is unavailable.
func _make_placeholder_mesh() -> Mesh:
	var mesh := BoxMesh.new()
	mesh.size = Vector3(1.0, 1.0, 1.0)
	return mesh


## Get the world object's display name.
func get_display_name() -> String:
	if world_object == null:
		return ""
	return world_object.get_display_name()