extends Spatial

signal new_focused_object( p_name )
signal equip( p_slot, p_item )
signal unequip( p_slot )


var mouse_delta = Vector2.ZERO
var zoom_level = 0
var camera_position = Vector3( 0.0, 2.0, -2.0 )

onready var camera_tps = $character/spring_arm/camera_tps
onready var camera_fps = $character/spring_arm/camera_fps

var proximity_objects = []
var focused_object = null
var focus_index = 0

static func get_input_direction() -> Vector3:
	return Vector3(
				Input.get_action_strength("move_strafe_right") - Input.get_action_strength("move_strafe_left"),
				0,
				Input.get_action_strength("move_backward") - Input.get_action_strength("move_forward")
			)
		
func _input( event ):
	# Run.
	if event.is_action_pressed( "move_toggle_run" ):
		$character.is_running = not $character.is_running

	# Camera.
	if event.is_action( "camera_zoom_in" ):
		self.zoom_level += 1
	elif event.is_action( "camera_zoom_out" ):
		self.zoom_level -= 1
		
	if event.is_action_pressed( "camera_reset_view" ):
		$character/spring_arm.rotation = Vector3.ZERO
		self.zoom_level = 0
		
	if event.is_action_pressed( "camera_switch" ):
		if self.camera_tps.current:
			self.camera_fps.make_current()
			$character/spring_arm.rotation = Vector3.ZERO
#            self.hide()
		else:
			self.camera_tps.make_current()
#            self.show()
	

	if event is InputEventMouseMotion:
		self.mouse_delta = event.relative
	
	# Jump.
	if event.is_action_pressed( "move_jump" ) and not $character.is_falling:
		$character.is_jump_started = true
	

	if event.is_action_pressed( "interact" ):
		self.interact()
	
	
	if event.is_action_pressed( "focus_next" ):
		self.focus_next()
#    if not self.get_tree().get_root().get_node( "main/scene/game" ).is_on_ui:
#        if event.is_action_pressed( "action_ready_weapon" ):
#            $character.is_readying_weapon = true
#        if event.is_action_released( "action_ready_weapon" ):
#            $character.is_readying_weapon = false
#            $character.is_weapon_ready = false
#        if $character.is_weapon_ready:
#            if event.is_action_pressed( "action_attack" ):
#                $character.attack()
	
	
func _process( delta ):
	$character.direction = self.get_input_direction()

	# Rotation.
	if not Input.is_key_pressed( KEY_SHIFT ) and not $character.is_jump_started:
		$character.orientation = (Input.get_action_strength("move_turn_left") - Input.get_action_strength("move_turn_right"))
	else:
		$character.orientation = 0.0
		
	# Camera.
	if not self.mouse_delta == Vector2.ZERO and self.camera_tps.current:
		if Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
			$character/spring_arm.rotate_y( -self.mouse_delta.x * 0.01 ) 
			self.camera_tps.rotate_x( self.mouse_delta.y * 0.01 )

#    if not $character.velocity.x == 0.0 or not $character.velocity.z == 0.0:
#        var velocity_without_gravity = $character.velocity
#        velocity_without_gravity.y = 0.0
##        $crosshair.material.set_shader_param( "spread", velocity_without_gravity.length() )
#        $character/target_spring_arm/crosshair.scale = Vector3( 1.0, 1.0, 1.0 ) * velocity_without_gravity.length()
#    else:
##        $crosshair.material.set_shader_param( "spread", 1 )
#        $character/target_spring_arm/crosshair.scale = Vector3( 1.0, 1.0, 1.0 )

	if $character.is_weapon_ready:
		if $character.get_main_weapon_node():
			$character/crosshair.show()
	#        $character/target_spring_arm.global_transform.origin = $character.get_main_weapon_node().get_node( "bullet_exit" ).global_transform.origin   
	#        $character/target_spring_arm.look_at_from_position( $character.get_main_weapon_node().get_node( "bullet_exit" ).global_transform.origin, $character.get_main_weapon_node().get_node( "target" ).global_transform.origin, Vector3( 0.0, 0.0, -1.0 ) )   
	#        $character/target_spring_arm.global_transform.basis.y =  $character.get_main_weapon_node().get_node( "bullet_exit" ).global_transform.basis.y
			$character/crosshair.global_transform.origin = $character.get_main_weapon_node().get_node( "bullet_exit/target_spring_arm/target" ).global_transform.origin
	else:
		$character/target_spring_arm.hide()

	# Values reset.
	self.mouse_delta = Vector2.ZERO
	
# Debug.
#var old_collider = null

func _physics_process(delta):
	var space_state = get_world().direct_space_state  
	# Camera.
	self.camera_position = Vector3( 0.0, 2 - 0.1*self.zoom_level, -2 + 0.1*self.zoom_level )
	$character/spring_arm/camera_position.translation = self.camera_position
	var global_camera_position = $character/spring_arm/camera_position.global_transform.origin
	var result = space_state.intersect_ray($character/look_at.global_transform.origin, global_camera_position, [self])
	
	
	if result:
		self.camera_tps.global_transform.origin = result.position
#        self.camera_tps.look_at( $character/look_at.global_transform.origin, Vector3( 0.0, 1.0, 0.0) )
		

	else:
		self.camera_tps.translation = self.camera_position
#        self.camera_tps.look_at( $character/look_at.global_transform.origin, Vector3( 0.0, 1.0, 0.0) )
		

func interact( p_object = null ):
	if p_object and p_object.has_method( "interact" ):
		p_object.interact( $character/creature.creature )
	else:
		if self.focused_object and self.focused_object.has_method( "interact" ):
			self.focused_object.interact( $character/creature.creature )
		elif self.focused_object and self.focused_object.get_parent() and self.focused_object.get_parent().has_method( "interact" ):
			self.focused_object.get_parent().interact( $character/creature.creature )

		if not self.focused_object:
			self.proximity_objects.erase( self.focused_object )
			self.update_focused_object()

func focus_next():
	self.focus_index += 1
	if self.focus_index >= self.proximity_objects.size():
		self.focus_index = 0    
	
	self.update_focused_object()
	
	
func set_focus_on( p_object, p_focus ):
	if p_object and p_object.has_method( "set_focus" ):
		p_object.set_focus( p_focus )
	elif p_object and p_object.get_parent() and p_object.get_parent().has_method( "set_focus" ):
		p_object.get_parent().set_focus( p_focus )
	
func update_focused_object():
	
	if self.focus_index >= self.proximity_objects.size():
		self.focus_index = 0
		
	var old_focused_object = self.focused_object
	if self.proximity_objects.size() > 0:
		self.focused_object = self.proximity_objects[ self.focus_index ]
	else:
		self.focused_object = null
		
	if old_focused_object:
		self.set_focus_on( old_focused_object, false )
	if self.focused_object:
		self.set_focus_on( self.focused_object, true )
		emit_signal( "new_focused_object", self.focused_object.name )

func _on_interact_area_body_entered(body):
	if not body == $character:
		self.proximity_objects.push_back( body )
		self.update_focused_object()

func _on_interact_area_body_exited(body):
	if not body == $character:
		self.proximity_objects.erase( body )
		self.update_focused_object()

func _on_character_equip(p_slot, p_item):
	emit_signal( "equip", p_slot, p_item )
	var weapons = $character.get_weapons()
	if weapons.size() > 0:
		
		var min_range = null
		for weapon in weapons:
			if not min_range:
				min_range = weapon.get_data( "range" )
			else:
				min_range = min( min_range, weapon.get_data( "range" ) )
		$character.get_main_weapon_node().get_node( "bullet_exit/target_spring_arm" ).spring_length = min_range

func _on_character_unequip(p_slot):
	emit_signal( "unequip", p_slot )

func _on_crosshair_area_body_entered(body):
	if not body == $character:
		if body is preload( "res://scenes/characters/character.gd" ):
			if body.player_relation == body.PLAYER_RELATION.ennemy:
				$character/crosshair.get_surface_material( 0 ).albedo_color = Color.red
			elif body.player_relation == body.PLAYER_RELATION.friend:
				$character/crosshair.get_surface_material( 0 ).albedo_color = Color.green
			else:
				$character/crosshair.get_surface_material( 0 ).albedo_color = Color.white

func _on_crosshair_area_body_exited(body):
	if not body == $character:
		$character/target_spring_arm/crosshair.get_surface_material( 0 ).albedo_color = Color.white