extends RefCounted
class_name BossShip

# ═══════════════════════════════════════════════════════════════════════════
# BossShip — Mini-Boss "WRAITH" (Welle 5) & Boss "LEVIATHAN" (Welle 8)
# Orbitet elliptisch um die Bildschirmmitte, feuert Spread-Geschosse.
# Wird von game_world.gd verwaltet (update/draw/take_hit).
# ═══════════════════════════════════════════════════════════════════════════

var x: float = 0.0
var y: float = 0.0
var heading: float = 0.0
var orbit_angle: float = 0.0
var hp: int = 20
var max_hp: int = 20
var dead: bool = false
var fire_timer: int = 0
var is_miniboss: bool = true   # false = Boss
var phase: int = 1             # 1 oder 2 (nur Boss)
var _phase2_triggered: bool = false
var _just_entered_phase2: bool = false
var pixel_size: int = 5        # Miniboss=5, Boss=7

const HULL_PIXELS: Array = [
	[6, 0, "nose"],
	[4, -2, "mid"],  [4, 2, "mid"],
	[2, 0, "dim"],
	[0, -4, "accent"], [0, 4, "accent"],
	[0, 0, "bright"],
	[-2, -2, "dim"], [-2, 2, "dim"],
	[-4, -4, "shadow"], [-4, 4, "shadow"],
	[-4, 0, "edge"],
]

# Mini-Boss WRAITH: Magenta/Lila
const PAL_MINI: Dictionary = {
	"nose":   Color(1.0, 0.15, 0.9,  1.0),
	"bright": Color(1.0, 0.5,  1.0,  1.0),
	"mid":    Color(0.75, 0.05, 0.7, 1.0),
	"dim":    Color(0.45, 0.02, 0.38, 1.0),
	"accent": Color(1.0, 0.0,  0.85, 1.0),
	"edge":   Color(0.28, 0.0, 0.28, 1.0),
	"shadow": Color(0.12, 0.0, 0.12, 1.0),
}

# Boss LEVIATHAN: Feuer-Orange
const PAL_BOSS: Dictionary = {
	"nose":   Color(1.0,  0.65, 0.0,  1.0),
	"bright": Color(1.0,  0.9,  0.25, 1.0),
	"mid":    Color(0.8,  0.38, 0.0,  1.0),
	"dim":    Color(0.5,  0.18, 0.0,  1.0),
	"accent": Color(1.0,  0.72, 0.0,  1.0),
	"edge":   Color(0.28, 0.08, 0.0,  1.0),
	"shadow": Color(0.12, 0.03, 0.0,  1.0),
}

# ── Initialisierung ────────────────────────────────────────────────────────

func init_miniboss(cx: float, cy: float) -> void:
	x = cx
	y = cy - 120.0
	orbit_angle = -PI * 0.5   # startet oben
	hp = 20; max_hp = 20
	is_miniboss = true
	pixel_size = 5
	fire_timer = 25            # kurze Verzögerung vor dem ersten Schuss

func init_boss(cx: float, cy: float) -> void:
	x = cx
	y = cy - 140.0
	orbit_angle = -PI * 0.5
	hp = 50; max_hp = 50
	is_miniboss = false
	phase = 1
	pixel_size = 7
	fire_timer = 25

# ── Update ─────────────────────────────────────────────────────────────────
# Gibt Array[Bullet] zurück. Wird von game_world._tick() pro Frame aufgerufen.

func update(delta: float, cx: float, cy: float) -> Array:
	if dead:
		return []

	# Orbitalbewegung (elliptisch, um Spannung zu erzeugen)
	var orbit_speed: float
	if is_miniboss:
		orbit_speed = 0.55
	elif phase == 1:
		orbit_speed = 0.44
	else:
		orbit_speed = 0.72   # Phase 2 schneller → gefährlicher

	orbit_angle += orbit_speed * delta
	var orbit_r: float = 185.0 if is_miniboss else 215.0
	x = cx + cos(orbit_angle) * orbit_r
	y = cy + sin(orbit_angle) * orbit_r * 0.58   # leicht elliptisch

	# Heading zeigt immer zur Bildschirmmitte (schießt nach innen)
	heading = atan2(cy - y, cx - x)

	# Feuer-Intervall
	fire_timer += 1
	var fire_interval: int
	if is_miniboss:
		fire_interval = 72
	elif phase == 1:
		fire_interval = 60
	else:
		fire_interval = 42

	var result: Array = []
	if fire_timer >= fire_interval:
		fire_timer = 0
		result = _fire()

	# Phase-2-Übergang (Boss, < 50% HP)
	if not is_miniboss and not _phase2_triggered and hp <= max_hp / 2:
		phase = 2
		_phase2_triggered = true
		_just_entered_phase2 = true

	return result

func _fire() -> Array:
	var ways: int
	if is_miniboss:
		ways = 3
	elif phase == 1:
		ways = 5
	else:
		ways = 8

	var bullet_speed: float = 4.2 if is_miniboss else 5.0
	var spread: float = PI / float(ways + 2)
	var bullets: Array = []

	for i in ways:
		var angle: float = heading + (float(i) - float(ways - 1) * 0.5) * spread
		var b := Bullet.new()
		b.init(x, y, angle, "boss")
		# Geschwindigkeit überschreiben (langsamer als Spielerkugeln für Ausweichen)
		b.vx = cos(angle) * bullet_speed
		b.vy = sin(angle) * bullet_speed
		if is_miniboss:
			b.color = Color(1.0, 0.15, 0.9, 1.0)   # Magenta
		elif phase == 1:
			b.color = Color(1.0, 0.5,  0.0, 1.0)   # Orange
		else:
			b.color = Color(1.0, 0.1,  0.0, 1.0)   # Dunkelrot
		bullets.append(b)

	return bullets

func take_hit() -> void:
	hp -= 1
	if hp <= 0:
		hp = 0
		dead = true

# ── Zeichnen ───────────────────────────────────────────────────────────────

func draw(canvas: CanvasItem) -> void:
	if dead:
		return

	var pal: Dictionary = PAL_MINI if is_miniboss else PAL_BOSS
	var ps: float = float(pixel_size)
	var hs: float = ps * 0.5
	var ch: float = cos(heading)
	var sh: float = sin(heading)

	# Rumpf — gleiche Offset-Tabelle wie EnemyShip, skaliert mit pixel_size
	for pix: Array in HULL_PIXELS:
		var lx: float = float(pix[0]) * ps
		var ly: float = float(pix[1]) * ps
		var wx: float = x + lx * ch - ly * sh
		var wy: float = y + lx * sh + ly * ch
		canvas.draw_rect(Rect2(wx - hs, wy - hs, ps, ps), pal[pix[2]])

	# Thruster-Glühen (hinter dem Schiff)
	var glow_x: float = x + cos(heading + PI) * (ps * 4.2)
	var glow_y: float = y + sin(heading + PI) * (ps * 4.2)
	var glow_r: float = ps + 2.0
	var pulse: float = 0.48 + 0.38 * sin(float(Time.get_ticks_msec()) * 0.012)
	var glow_col: Color
	if is_miniboss:
		glow_col = Color(1.0, 0.0, 0.85, pulse)
	elif phase == 1:
		glow_col = Color(1.0, 0.5, 0.0,  pulse)
	else:
		glow_col = Color(1.0, 0.15, 0.0, pulse + 0.15)   # Phase 2 heller
	canvas.draw_circle(Vector2(glow_x, glow_y), glow_r, glow_col)