tool
extends CharacterSkeleton3D

# Copyright Péter Magyar relintai@gmail.com
# MIT License, functionality from this class needs to be protable to the entity spell system

# Copyright (c) 2019-2020 Péter Magyar

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

var job_script = preload("res://player/CharacterSkeletonMeshJob.gd")

export(bool) var refresh_in_editor : bool = false setget editor_build
export(bool) var automatic_build : bool = false
export(bool) var use_lod : bool = true

export(NodePath) var mesh_instance_path : NodePath
var mesh_instance : MeshInstance = null

export(NodePath) var skeleton_path : NodePath
var skeleton : Skeleton

export(Array, Material) var materials : Array
var _materials : Array = Array()

export (NodePath) var left_hand_attach_point_path : NodePath
var left_hand_attach_point : CharacterSkeketonAttachPoint
export (NodePath) var right_hand_attach_point_path : NodePath
var right_hand_attach_point : CharacterSkeketonAttachPoint
export (NodePath) var torso_attach_point_path : NodePath
var torso_attach_point : CharacterSkeketonAttachPoint
export (NodePath) var root_attach_point_path : NodePath
var root_attach_point : CharacterSkeketonAttachPoint

export(Array, ModelVisual) var viss : Array

var meshes : Array

var _current_lod_level : int = 0

var _generating : bool = false

var _mesh_job : ThreadPoolJob = null

var bone_names = {
	0: "root",
	1: "pelvis",
	2: "spine",
	3: "spine_1",
	4: "spine_2",
	5: "neck",
	6: "head",
	
	7: "left_clavicle",
	8: "left_upper_arm",
	9: "left_forearm",
	10: "left_hand",
	11: "left_thunb_base",
	12: "left_thumb_end",
	13: "left_fingers_base",
	14: "left_fingers_end",
	
	15: "right_clavicle",
	16: "right_upper_arm",
	17: "right_forearm",
	18: "right_hand",
	19: "right_thumb_base",
	20: "right_thumb_head",
	21: "right_fingers_base",
	22: "right_fingers_head",
	
	23: "left_thigh",
	24: "left_calf",
	25: "left_foot",
	
	26: "right_thigh",
	27: "right_calf",
	28: "right_foot",
}


var _textures : Array
var _texture : Texture

var _editor_built : bool = false

func _enter_tree():
	_mesh_job = job_script.new()
	_mesh_job.use_lod = use_lod
	_mesh_job.connect("finished", self, "job_finished")
	
	meshes.resize(3)
	
	skeleton = get_node(skeleton_path) as Skeleton
	mesh_instance = get_node(mesh_instance_path) as MeshInstance

	left_hand_attach_point = get_node(left_hand_attach_point_path) as CharacterSkeketonAttachPoint
	right_hand_attach_point = get_node(right_hand_attach_point_path) as CharacterSkeketonAttachPoint
	torso_attach_point = get_node(torso_attach_point_path) as CharacterSkeketonAttachPoint
	root_attach_point = get_node(root_attach_point_path) as CharacterSkeketonAttachPoint

	if _materials.size() != materials.size():
		for m in materials:
			_materials.append(m.duplicate())
			
		_mesh_job.materials = _materials

	set_process(false)
			
#	if not Engine.is_editor_hint():
	for iv in viss:
		add_model_visual(iv as ModelVisual)
			
#func _exit_tree():
#	_mesh_job.
	
	if automatic_build:
		build_model()
		

func _build_model():
	if _generating:
		return
		
	_generating = true
	
	if Engine.is_editor_hint() and not refresh_in_editor:
		set_process(false)
		return
	
	if not automatic_build:
		set_process(false)
		return
	
	build()
	set_process(false)
		
	model_dirty = false
	
func build():
	setup_build_mesh()
	
	var data : Array = Array()

	for skele_point in range(EntityEnums.SKELETON_POINTS_MAX):
		var bone_name : String = get_bone_name(skele_point)
		
		if bone_name == "":
			print("Bone name error")
			continue
		
		var bone_idx : int = skeleton.find_bone(bone_name)

		for j in range(get_model_entry_count(skele_point)):
			var entry : SkeletonModelEntry = get_model_entry(skele_point, j)
			
			if entry.entry.get_mesh(model_index) != null:
				var ddict : Dictionary = Dictionary()
				
				ddict["bone_name"] = bone_name
				ddict["bone_idx"] = bone_idx
				
				if entry.entry.get_texture(model_index) != null:
					ddict["texture"] = entry.entry.get_texture(model_index)
			
				ddict["transform"] = skeleton.get_bone_global_pose(bone_idx)
				ddict["mesh"] = entry.entry.get_mesh(model_index)
				
				data.append(ddict)
	
	_mesh_job.data = data
	ThreadPool.add_job(_mesh_job)

	finish_build_mesh()

func setup_build_mesh() -> void:
	if mesh_instance != null:
		mesh_instance.hide()
	
	if get_animation_tree() != null:
		get_animation_tree().active = false
	
	if get_animation_player() != null:
		get_animation_player().play("rest")
		get_animation_player().seek(0, true)
	
func finish_build_mesh() -> void:
	mesh_instance.mesh = meshes[_current_lod_level]
		
	if get_animation_tree() != null:
		get_animation_tree().active = true
		
	if mesh_instance != null:
		mesh_instance.show()
	
	_generating = false	
	
func job_finished():
	meshes = _mesh_job.meshes
	_texture = _mesh_job._texture
	mesh_instance.mesh = meshes[_current_lod_level]

func clear_mesh() -> void:
	meshes.clear()
	meshes.resize(3)
	
	if mesh_instance != null:
		mesh_instance.mesh = null

func editor_build(val : bool) -> void:
	if not is_inside_tree():
		return

	skeleton = get_node(skeleton_path) as Skeleton
	mesh_instance = get_node(mesh_instance_path) as MeshInstance
	
	if val:
		_editor_built = true
		build()
	else:
		clear_mesh()
		_editor_built = false
		
	refresh_in_editor = val

func get_bone_name(skele_point : int) -> String:
	if bone_names.has(skele_point):
		return bone_names[skele_point]
		
	return ""
	
func set_lod_level(level : int) -> void:
	if _current_lod_level == level:
		return
		
	if meshes.size() == 0:
		return
	
	if level < 0:
		return
		
	if level >= meshes.size():
		level = meshes.size() - 1
		
	_current_lod_level = level
	
	mesh_instance.mesh = meshes[_current_lod_level]