class_name ShootComponent extends Node

@export var stagger_offset: float = 0.5 # Time delay per projectile index (seconds)
@export var horizontal_offset: float = 1.0 # Horizontal distance per projectile index

@onready var weapon_component: Node = %WeaponComponent
@onready var player = $".."

func shoot():
    var weapon_data = weapon_component.data # WeaponShot resource configuration
    var current_time = Time.get_ticks_msec() / 1000.0
    var total_projectiles = weapon_data.projectiles

    if player.travel > weapon_data.spacing:

        # Calculate center index for symmetrical staggering
        var center_index = (total_projectiles - 1) / 2.0

        if total_projectiles > 0:
            for b in range(total_projectiles):
                var bullet_scene = weapon_data.bullet_scene
                var bullet := bullet_scene.instantiate() as Node2D
                get_tree().root.add_child(bullet)

                # Calculate index relative to center (0 = center, -1/+1 = first from center)
                var index_from_center: float = b - center_index

                # Calculate timing offset for staggered firing
                var time_offset: float = index_from_center * weapon_data.stagger_offset

                # Calculate horizontal offset for this bullet (symmetrical: left=-ve, right=+ve)
                var bullet_horizontal_offset: float = index_from_center * weapon_data.horizontal_offset

                # Calculate vertical offset from center point (symmetrical vertical spread)
                var distance_from_center: float = abs(index_from_center)
                var vertical_offset: float = (distance_from_center * weapon_data.origin * -1) / 2

                # Final position combines symmetrical horizontal spread with fixed vertical offset from weapon origin
                bullet.position = player.position + Vector2(bullet_horizontal_offset, weapon_data.origin)



                # Set timing properties on the bullet
                bullet.time_offset = time_offset
                bullet.fire_time = current_time + time_offset

                # Set the angle for bullets - symmetrical spread around vertical (straight up = -90°)
                if weapon_data.angle == 0:
                    # If angle is 0, all projectiles fire straight up
                    bullet.angle = -90.0
                else:
                    # Set angle for bullets - symmetrical spread around vertical (straight up = -90°)
                    if index_from_center == 0:
                        # Center projectile fires straight up
                        bullet.angle = -90.0
                    else:
                        # Left projectiles: positive angle (up and to the left), Right projectiles: negative angle (up and to the right)
                        bullet.angle = -90.0 + weapon_data.angle * sign(index_from_center)





            # Subtract projectile spacing from current Player travel for next shot
            player.travel -= weapon_data.spacing