extends SceneTree

# Headless equivalent of build_dasher_pack.gd.
# Run from CLI AFTER convert_dasher_animations_headless.gd:
#   godot --headless --path /home/beng/Godot/Projects/tekton-enet --script res://tools/build_dasher_pack_headless.gd
#
# Produces: res://assets/characters/animations/dasher-pack.tres

const ANIM_DIR := "res://assets/characters/animations"
const OUTPUT := "res://assets/characters/animations/dasher-pack.res"

func _init() -> void:
	print("[Build] Headless run starting...")
	var combined := AnimationLibrary.new()

	var dir := DirAccess.open(ANIM_DIR)
	if not dir:
		push_error("[Build] Cannot open %s" % ANIM_DIR)
		quit(1)
		return

	var loaded: Array[String] = []
	for fname in dir.get_files():
		if not fname.begins_with("dasher_"): continue
		if not fname.ends_with(".res"): continue
		if fname == "dasher-pack.res": continue
		var path := "%s/%s" % [ANIM_DIR, fname]
		var res: Resource = load(path)
		if not res is AnimationLibrary:
			push_warning("[Build] %s is not an AnimationLibrary, skipping" % fname)
			continue
		var lib: AnimationLibrary = res
		for anim_name in lib.get_animation_list():
			if combined.has_animation(anim_name):
				push_warning("[Build] Duplicate anim name '%s' in %s, skipping" % [anim_name, fname])
				continue
			combined.add_animation(anim_name, lib.get_animation(anim_name))
			loaded.append("%s/%s" % [fname, anim_name])

	var err := ResourceSaver.save(combined, OUTPUT)
	if err != OK:
		push_error("[Build] ResourceSaver.save failed: %d" % err)
		quit(1)
		return
	print("[Build] Done. %d animation(s) written to %s" % [loaded.size(), OUTPUT])
	for l in loaded:
		print("  - %s" % l)
	quit(0)