extends Spatial

const TIME_MAX = 3000 # msec
const GYROSCOPE_MAX_DIFF = 0.5
const OFFSET_CAMERA_MAX = 0.12
const OFFSET_STEP_CHANGE = 0.01

var gyroscope_value_old = Vector3(0, 0, 0)

onready var meshes = {
	"dagger": {
		"mesh": $"Main Scene Props/dagger",
		"value": 0.0,
		"label": "Dagger",
		"lock": false,
		"tick_reference": null
	}
}

func _ready():
	$Dialog/ConfirmEscape.set_title(tr("SCENE_WARCRAFT_DIALOG_QUIT_TITLE"))
	$Dialog/ConfirmEscape.set_text(tr("SCENE_WARCRAFT_DIALOG_QUIT_QUESTION"))

func _process(_delta):
	_check_quit_scene()
	_check_dissolve_mesh()
	_check_change_angle_camera()

func _check_quit_scene():
	# Event key "escape" and "godot event" ui_end
	if Input.is_action_just_pressed("ui_end"):
		_confirm_before_quit()

func _check_dissolve_mesh():
	# Event dissolve in object searched by gamer
	for mesh in meshes:
		if meshes[mesh]["lock"] == true and meshes[mesh]["mesh"] != null:
			if meshes[mesh]["tick_reference"] == null:
				meshes[mesh]["tick_reference"] = OS.get_ticks_msec()
			
			if OS.get_ticks_msec() < meshes[mesh]["tick_reference"] + TIME_MAX:
				meshes[mesh]["value"] += 0.01
				meshes[mesh]["mesh"].get_surface_material(0).set("shader_param/dissolve_amount", meshes[mesh]["value"])
			else:
				meshes[mesh]["mesh"].call_deferred("free")
				meshes[mesh]["mesh"] = null

func _check_change_angle_camera():
	var camera = $"Main Camera"
	var gyroscope = Input.get_gyroscope()
	
	if camera.h_offset >= -OFFSET_CAMERA_MAX:
		if _action_pressed("ui_left") or _action_gyroscope("left", gyroscope):
			print("[warcraft#_ready] move camera angle to left")
			$"Main Camera".h_offset -= OFFSET_STEP_CHANGE
	
	if camera.h_offset <= OFFSET_CAMERA_MAX:
		if _action_pressed("ui_right") or _action_gyroscope("right", gyroscope):
			print("[warcraft#_ready] move camera angle to right")
			$"Main Camera".h_offset += OFFSET_STEP_CHANGE
	
	if camera.v_offset >= -OFFSET_CAMERA_MAX:
		if _action_pressed("ui_down") or _action_gyroscope("down", gyroscope):
			print("[warcraft#_ready] move camera angle to down")
			$"Main Camera".v_offset -= OFFSET_STEP_CHANGE
	
	if camera.v_offset <= OFFSET_CAMERA_MAX:
		if _action_pressed("ui_up") or _action_gyroscope("up", gyroscope):
			print("[warcraft#_ready] move camera angle to up")
			$"Main Camera".v_offset += OFFSET_STEP_CHANGE
	
	gyroscope_value_old = gyroscope

func _action_pressed(action):
	return Input.is_action_pressed(action)

func _action_gyroscope(action, gyroscope):
	if Global.gyroscope_enabled():
		var expression = Expression.new()
		
		expression.parse("_gyroscope_changed_"+action+"(gyroscope)", ["gyroscope"])
		
		if expression.execute([gyroscope], self):
			return true
		else:
			return false
	else:
		return false

func _gyroscope_changed_left(gyroscope):
	return (gyroscope.abs().y - gyroscope_value_old.abs().y) > GYROSCOPE_MAX_DIFF and \
			gyroscope.y < gyroscope_value_old.y

func _gyroscope_changed_right(gyroscope):
	return (gyroscope.abs().y - gyroscope_value_old.abs().y) > GYROSCOPE_MAX_DIFF and \
			gyroscope.y > gyroscope_value_old.y

func _gyroscope_changed_down(gyroscope):
	return (gyroscope.abs().z - gyroscope_value_old.abs().z) > GYROSCOPE_MAX_DIFF and \
			gyroscope.z > gyroscope_value_old.z or \
		   (gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
			gyroscope.x > gyroscope_value_old.x

func _gyroscope_changed_up(gyroscope):
	return (gyroscope.abs().z - gyroscope_value_old.abs().z) > GYROSCOPE_MAX_DIFF and \
			gyroscope.z < gyroscope_value_old.z or \
		   (gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
			gyroscope.x < gyroscope_value_old.x

func _notification(what):
	# Notification for android back action
	if what == MainLoop.NOTIFICATION_WM_GO_BACK_REQUEST:
		_confirm_before_quit()

func _confirm_before_quit():
	$Dialog/ConfirmEscape.popup()

# Back to main scene
func _quit_to_menu():
	Global.goto_scene("res://scenes/main.tscn")

# Event when user click/touch dagger
func _on_dagger_input_event(_camera, event, _click_position, _click_normal, _shape_idx):
	_initialize_mesh_ref("dagger", event)

func _initialize_mesh_ref(meshInstance, event):
	if meshes[meshInstance]["lock"] == false and (event is InputEventMouseButton or event is InputEventScreenTouch):
		meshes[meshInstance]["lock"] = true

func _on_ConfirmEscape_confirmed():
	_quit_to_menu()