class_name P93CoreLoopState
extends RefCounted

enum Phase { TITLE, HALL, ENCOUNTER, BATTLE, RESULT }

var revision := 0
var phase := Phase.TITLE
var coin := 24
var company: Array[String] = ["Hearthguard"]
var available_offers: Array[String] = ["Wayrunner", "Farstring", "Kindhand"]
var focused_offer := ""
var hired_member := ""
var selected_encounter := ""
var reward_committed := false
var last_reward := 0
var last_outcome := ""
var hire_receipts: Array[Dictionary] = []
var reward_receipts: Array[Dictionary] = []
var focused_equipment := ""
var equipped_items: Dictionary = {"Hearthguard": ""}
var equipment_receipts: Array[Dictionary] = []
var member_levels: Dictionary = {"Hearthguard": 1}
var member_xp: Dictionary = {"Hearthguard": 0}
var xp_receipts: Array[Dictionary] = []


func reset() -> void:
	revision = 0
	phase = Phase.TITLE
	coin = 24
	company.assign(["Hearthguard"])
	available_offers.assign(["Wayrunner", "Farstring", "Kindhand"])
	focused_offer = ""
	hired_member = ""
	selected_encounter = ""
	reward_committed = false
	last_reward = 0
	last_outcome = ""
	hire_receipts.clear()
	reward_receipts.clear()
	focused_equipment = ""
	equipped_items = {"Hearthguard": ""}
	equipment_receipts.clear()
	member_levels = {"Hearthguard": 1}
	member_xp = {"Hearthguard": 0}
	xp_receipts.clear()


func snapshot() -> Dictionary:
	return {
		"revision": revision,
		"phase": phase,
		"coin": coin,
		"company": company.duplicate(),
		"capacity": 10,
		"available_offers": available_offers.duplicate(),
		"focused_offer": focused_offer,
		"hired_member": hired_member,
		"selected_encounter": selected_encounter,
		"reward_committed": reward_committed,
		"last_reward": last_reward,
		"last_outcome": last_outcome,
		"hire_receipts": hire_receipts.duplicate(true),
		"reward_receipts": reward_receipts.duplicate(true),
		"focused_equipment": focused_equipment,
		"equipped_items": equipped_items.duplicate(true),
		"equipment_receipts": equipment_receipts.duplicate(true),
		"member_levels": member_levels.duplicate(true),
		"member_xp": member_xp.duplicate(true),
		"xp_receipts": xp_receipts.duplicate(true),
	}.duplicate(true)


func invariants_hold() -> bool:
	if revision < 0 or coin < 0:
		return false
	if phase < Phase.TITLE or phase > Phase.RESULT:
		return false
	if company.is_empty() or company.size() > 10:
		return false
	var seen := {}
	for member_id in company:
		if member_id not in ["Hearthguard", "Wayrunner", "Farstring", "Kindhand"] or seen.has(member_id):
			return false
		seen[member_id] = true
		if not equipped_items.has(member_id) or String(equipped_items[member_id]) not in ["", "EQ-002", "EQ-012"]:
			return false
		if not member_levels.has(member_id) or int(member_levels[member_id]) < 1 or int(member_levels[member_id]) > 10:
			return false
		if not member_xp.has(member_id) or int(member_xp[member_id]) < 0:
			return false
		var level := int(member_levels[member_id])
		if level < 10 and int(member_xp[member_id]) >= 20 + 10 * level:
			return false
	for member_id in equipped_items:
		if member_id not in company:
			return false
	for member_id in member_levels:
		if member_id not in company:
			return false
	for member_id in member_xp:
		if member_id not in company:
			return false
	if not focused_equipment.is_empty() and focused_equipment not in ["EQ-002", "EQ-012"]:
		return false
	var owned_items := {}
	for item_id in equipped_items.values():
		if String(item_id).is_empty():
			continue
		if owned_items.has(item_id):
			return false
		owned_items[item_id] = true
	for offer_id in available_offers:
		if seen.has(offer_id):
			return false
		seen[offer_id] = true
	if not focused_offer.is_empty() and focused_offer not in available_offers:
		return false
	if not selected_encounter.is_empty() and selected_encounter not in ["open_road", "crosswind", "bell_breach"]:
		return false
	if reward_committed and last_outcome != "victory":
		return false
	return true