extends CharacterBody2D

class_name NPCShip

@export var DestinationTimer : Timer
@export var Fraction = "Enemy"
@export var BountyMin : int = 20
@export var BountyMax : int = 30
@export var Bounty : PackedScene

var State = "idle"
var Shooting = false
var AllowShooting = true

@onready var PlayerShip = get_tree().current_scene.get_node("MainShip")
@onready var NPCEngine = $"Engine"
@onready var Hull = $"Hull"
@onready var DebugLabel = $DebugLabel
@onready var TargetSnap = $TargetSnap
@onready var Healthbar = $Zalupa/ZalupaTwo/Health
@onready var Shield = $Shield

func _ready():
	DestinationTimer.timeout.connect(switchdestination)
	TargetSnap.mouse_entered.connect(get_tree().current_scene.addtargetlist.bind(self))
	TargetSnap.mouse_exited.connect(get_tree().current_scene.removetargetlist.bind(self))

func _physics_process(_delta):
	match State:
		"idle":
			idlestate()
		"chase":
			chasestate()
		"maintaindistance":
			maintaindistancestate()
		"runaway":
			runawaystate()
	Healthbar.text = "{HP} HS + {SC} SC".format({"HP" : "%0.2f" % Hull.HP, "SC" : "%0.2f" % Shield.Capacity})
	if Vector2.ZERO.distance_to(global_position) > 5800 or Hull.HP <= 0:
		destroy()

func switchdestination():
	NPCEngine.DestinationAngle = randi_range(0, 360)

func idlestate():
	Shooting = false
	if global_position.distance_to(PlayerShip.global_position) <= 512 and PlayerShip.AllowShooting: State = "chase"
	if Vector2.ZERO.distance_to(global_position) > 5800: NPCEngine.DestinationAngle = rad_to_deg(global_position.angle_to(Vector2.ZERO))

func chasestate():
	NPCEngine.DestinationAngle = rad_to_deg(global_position.angle_to_point(PlayerShip.global_position))
	Shooting = true if NPCEngine.DestinationDifference == clamp(NPCEngine.DestinationDifference, -5, 5) else false
	if global_position.distance_to(PlayerShip.global_position) > 512 or !PlayerShip.AllowShooting: State = "idle"
	if Hull.HP < Hull.MaxHP * 0.2: State = "runaway"
	if global_position.distance_to(PlayerShip.global_position) <= 128: State = "maintaindistance"

func maintaindistancestate():
	NPCEngine.DestinationAngle += 1
	Shooting = true if NPCEngine.DestinationDifference == clamp(NPCEngine.DestinationDifference, -5, 5) else false
	if global_position.distance_to(PlayerShip.global_position) > 128: State = "chase"
	if !PlayerShip.AllowShooting: State = "idle"

func runawaystate():
	Shooting = false
	NPCEngine.DestinationAngle = rad_to_deg(global_position.angle_to_point(PlayerShip.global_position)) - 180
	if global_position.distance_to(PlayerShip.global_position) > 1024 or !PlayerShip.AllowShooting: State = "idle"

func destroy():
	Hull.HP = Hull.MaxHP
	Hull.Fuel = Hull.MaxFuel
	Shield.Capacity = Shield.MaxShieldCapacity
	State = "idle"
	var BountyInst = Bounty.instantiate()
	get_tree().current_scene.add_child(BountyInst)
	BountyInst.global_position = global_position
	BountyInst.Amount = randi_range(BountyMin, BountyMax)
	BountyInst.Text.text = str(BountyInst.Amount) + " MU"
	global_position = Vector2(randi_range(-4096, 4096), randi_range(-4096, 4096))