class_name ResearchXPTracker
extends Node

@export var game_state: LevelGameState

signal research_xp_changed(research_id: StringName, new_xp: BigNumber)
signal research_level_up(research_id: StringName, old_level: int, new_level: int)

func add_xp_with_buffs(research_id: StringName, base_xp: BigNumber) -> BigNumber:
	if game_state == null:
		return BigNumber.new(0.0, 0)
	
	var buff_multiplier: float = game_state.get_research_xp_multiplier(research_id)
	var multiplier_bn: BigNumber = BigNumber.from_float(buff_multiplier)
	var actual_xp: BigNumber = base_xp.multiply(multiplier_bn)
	
	game_state.add_research_xp(research_id, actual_xp)
	
	return actual_xp

func _on_generator_produced(generator_id: StringName, _amount: Variant) -> void:
	var research: ResearchData = _get_research_for_generator(generator_id)
	if research == null:
		return
	
	var research_catalogue: ResearchCatalogue = game_state.research_catalogue
	if research_catalogue == null:
		return
	
	research = research_catalogue.get_research_by_generator_id(generator_id)
	if research == null:
		return
	
	if not _is_research_active(research.id):
		return
	
	var amount_big: BigNumber = _amount
	var amount_float: float = amount_big.mantissa * pow(10.0, float(amount_big.exponent))
	if amount_float <= 0.0:
		return
	
	var base_xp: BigNumber = BigNumber.from_float(research.xp_per_currency_produced * amount_float)
	if base_xp.mantissa <= 0.0:
		return
	
	add_xp_with_buffs(research.id, base_xp)

func _get_research_for_generator(generator_id: StringName) -> ResearchData:
	if game_state == null or game_state.research_catalogue == null:
		return null
	return game_state.research_catalogue.get_research_by_generator_id(generator_id)

func _is_research_active(research_id: StringName) -> bool:
	if game_state == null:
		return false
	
	var research_panel: Node = game_state.find_child("ResearchPanel", true, false)
	if research_panel == null:
		return true
	
	if research_panel.has_method("is_research_active"):
		return research_panel.is_research_active(research_id)
	
	return true

func activate_research(research_id: StringName) -> void:
	if game_state == null:
		return
	
	var research_panel: Node = game_state.find_child("ResearchPanel", true, false)
	if research_panel != null and research_panel.has_method("activate_research"):
		research_panel.activate_research(research_id)