extends Node3D

# Tekton - Roaming NPC
# Moves around the grid and spawns tiles when attacked.

signal movement_finished

@export var current_position: Vector2i = Vector2i(0, 0)
@export var health: int = 3
@export var movement_speed: float = 0.4 # Seconds per step

var enhanced_gridmap: Node
var is_moving: bool = false
var tween: Tween

func initialize(start_pos: Vector2i, p_gridmap: Node):
	current_position = start_pos
	enhanced_gridmap = p_gridmap
	
	# Snap to grid visual (Center on tile)
	# User wanted Z=1.0. X should ideally be 0.5 (center).
	# Ensuring consistent offset across Init, Sync, and Move.
	position = Vector3(current_position.x + 0.5, 1.0, current_position.y + 1.0)
	
	# NO RPC HERE - Spawn RPC handles initial position sync

@rpc("any_peer", "call_local", "reliable")
func sync_position(pos: Vector2i):
	current_position = pos
	position = Vector3(current_position.x + 0.5, 1.0, current_position.y + 1.0)

func move_to(target_pos: Vector2i):
	if is_moving: return
	
	# Validate
	if not enhanced_gridmap.is_position_valid(target_pos):
		return
		
	# Check simple collision (optional, can be expanded)
	# For now, Tekton walks through things or we check elsewhere?
	# Controller should check validity.
	
	is_moving = true
	var world_pos = Vector3(target_pos.x + 0.5, 1.0, target_pos.y + 1.0)
	
	# Rotation
	var dir = world_pos - position
	if dir.length_squared() > 0.1:
		var target_rot = atan2(dir.x, dir.z)
		rotation.y = target_rot
	
	# Tween Movement (Match Z+0.5 offset for symmetry during movement as requested)
	var final_world_pos = Vector3(target_pos.x + 0.5, 1.0, target_pos.y + 0.5)
	tween = create_tween()
	tween.tween_property(self, "position", final_world_pos, movement_speed).set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
	tween.tween_callback(func():
		current_position = target_pos
		is_moving = false
		emit_signal("movement_finished")
	)
	
	if is_multiplayer_authority():
		rpc("sync_movement", target_pos)

@rpc("any_peer", "call_remote", "reliable")
func sync_movement(target_pos: Vector2i):
	# Clients execute the move visually
	move_to(target_pos)

# --- COMBAT / INTERACTION ---

func on_hit(attacker: Node = null):
	"""Called when hit by a player attack."""
	print("[Tekton] Hit by %s!" % (attacker.name if attacker else "Unknown"))
	
	# Visual Reaction (Flash red)
	_flash_damage()
	
	# Spawn Tiles
	if is_multiplayer_authority():
		spawn_tiles_around()

func _flash_damage():
	var meshes = find_children("*", "MeshInstance3D", true)
	for mesh in meshes:
		var original_modulate = mesh.transparency
		# Quick flash hack or shader param? 
		# If standard material, maybe just modulate visibility or scale
		var t = create_tween()
		t.tween_property(mesh, "scale", Vector3(1.2, 1.2, 1.2), 0.1)
		t.tween_property(mesh, "scale", Vector3(1.0, 1.0, 1.0), 0.1)

func spawn_tiles_around():
	"""Spawns a mix of normal and special tiles in a radius."""
	if not enhanced_gridmap: return
	
	var radius = 2
	var rng = RandomNumberGenerator.new()
	rng.randomize()
	
	print("[Tekton] Spawning tiles around %s" % current_position)
	
	for x in range(-radius, radius + 1):
		for y in range(-radius, radius + 1):
			var pos = current_position + Vector2i(x, y)
			
			# Don't overwrite the Tekton's own cell? Or do? 
			# Maybe avoid center.
			if x == 0 and y == 0: continue
			
			if enhanced_gridmap.is_position_valid(pos):
				# 50% chance to spawn something
				if rng.randf() > 0.5: continue
				
				# Determine Type
				var item_id: int
				var roll = rng.randf()
				
				if roll < 0.6:
					# 60% Normal Tile (7-10)
					item_id = rng.randi_range(7, 10)
				elif roll < 0.9:
					# 30% PowerUp (11-14)
					item_id = rng.randi_range(11, 14)
				else:
					# 10% Obstacle/Trap (optional)
					item_id = -1 # Clear?
					
				if item_id != -1:
					var main = get_tree().get_root().get_node_or_null("Main")
					if main:
						main.rpc("sync_grid_item", pos.x, 1, pos.y, item_id)