Bomber-Thorsten/bomb.gd

extends RigidBody2D

@export var speed = 400
@export var explosion_damage = 600

var velocity = Vector2.ZERO
var is_in_flight = false
var has_exploded = false  # Flag to track if the bomb has exploded

@onready var sprite = $Sprite2D
@onready var collision = $CollisionShape2D
@onready var particles = $Explosion
@onready var explosion_sound = $AudioStreamPlayer2D
@onready var explosion_area = $ExplosionArea
@onready var timer = $Timer
@onready var camera = get_parent().get_parent().get_node("MultiTargetCamera")
@onready var tile_map_layer = get_parent().get_parent().get_node("TileMapLayer")
@export var off_screen_margin = 2000

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	camera.add_target(self)

	global_position = position
	z_index = -1
	# Disable the particles and audio on start
	particles.emitting = false
	explosion_sound.playing = false

	# Connect the timer's timeout signal to the cleanup function
	timer.connect("timeout", _on_timeout)

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:		
	if is_in_flight:
		# Explode if the bomb goes off-screen
		if is_off_screen() and not has_exploded:
			trigger_explosion()

# This function is used to set the velocity of the bomb when it’s thrown
func set_velocity(new_velocity: Vector2) -> void:
	# Apply an impulse based on the new velocity
	apply_central_impulse(new_velocity)
	is_in_flight = true


# Function to trigger the explosion
func trigger_explosion():
	if has_exploded:
		return  # Prevent multiple explosions
 
	# Set the flag to true, indicating that the bomb has exploded
	has_exploded = true

	camera.remove_target(self)

	# Play the explosion sound
	explosion_sound.play()

	# Enable and emit the particles
	particles.emitting = true

	# Push away players within the explosion radius
	push_away_players()
	
	# Destroy tiles in the explosion radius
	destroy_tiles_in_explosion_area()

	# Start the timer to cleanup the explosion
	timer.start()
	
	sprite.hide()

func push_away_players():
	if not explosion_area:
		print("ExplosionArea2D is missing!")
		return

	var overlapping_bodies = explosion_area.get_overlapping_bodies()
	print("Overlapping bodies:", overlapping_bodies)
	
	
	for body in overlapping_bodies:
		if body is RigidBody2D:
			print("Pushing body:", body.name)
			
			var direction = (body.global_position - global_position).normalized()
			var impulse = direction * explosion_damage
			body.apply_central_impulse(impulse)

func destroy_tiles_in_explosion_area():
	var center = global_position  # Explosion center in global coordinates
	var radius = 150  # Explosion radius in pixels
	
	# Convert center to map coordinates
	var map_center = tile_map_layer.local_to_map(center)
	print("Explosion center in map coordinates:", center, map_center)
	
	# Tile dimensions
	var tile_width = 16
	var tile_height = 16
	
	# Calculate bounds of explosion in tile coordinates
	var min_x = int((center.x - radius) / tile_width)
	var max_x = int((center.x + radius) / tile_width)
	var min_y = int((center.y - radius) / tile_height)
	var max_y = int((center.y + radius) / tile_height)
	
	print("Explosion bounds in tile coordinates: ", Vector2i(min_x, min_y), Vector2i(max_x, max_y))
	
	# Loop through the affected tiles
	for x in range(min_x, max_x + 1):
		for y in range(min_y, max_y + 1):
			# Calculate the distance from the explosion center to the tile center
			var tile_pos = tile_map_layer.map_to_local(Vector2i(x, y))
			var dist = center.distance_to(tile_pos)
			
			# Check if the tile is within the explosion radius
			if dist <= radius:
				print("Checking tile at:", Vector2i(x, y), "Distance:", dist)
				print(tile_map_layer.get_cell_source_id(Vector2i(x, y)))
				
				# Erase the tile if it exists
				if tile_map_layer.get_cell_source_id(Vector2i(x, y)) != -1:
					tile_map_layer.erase_cell(Vector2i(x, y))
					print("Erased tile at:", Vector2i(x, y))


# Function to check if the bomb is off-screen
func is_off_screen() -> bool:
	var screen_rect = Rect2(camera.position - camera.zoom * camera.get_viewport_rect().size / 2, 
							camera.zoom * camera.get_viewport_rect().size)
	screen_rect = screen_rect.grow(off_screen_margin)  # Expand the screen rectangle by the margin
	return not screen_rect.has_point(global_position)

# Cleanup function called when the timer times out
func _on_timeout():
	# Once the timer finishes, queue the particles for cleanup (optional)
	particles.emitting = false
	explosion_sound.stop() # Stop the sound if it's still playing
	
	queue_free()