class_name EconomicEventRecord
extends RefCounted

const SCHEMA_VERSION := 3
const POSITION_LEGACY_SCHEMA_VERSION := 2
const LEGACY_SCHEMA_VERSION := 1

var data: Dictionary


func _init(record_data: Dictionary = {}) -> void:
	data = record_data.duplicate(true)


static func create(
	event_id: int,
	event_type: StringName,
	tick: int,
	actor_id: int,
	source_id: StringName,
	destination_id: StringName,
	item_id: StringName,
	amount: float,
	world_position: Vector3 = Vector3.ZERO
) -> EconomicEventRecord:
	return EconomicEventRecord.new(
		{
			"schema_version": SCHEMA_VERSION,
			"event_id": event_id,
			"event_type": String(event_type),
			"tick": tick,
			"actor_id": actor_id,
			"source_id": String(source_id),
			"destination_id": String(destination_id),
			"item_id": String(item_id),
			"amount": amount,
			"action_id": "",
			"required_amount": 0.0,
			"world_position": [world_position.x, world_position.y, world_position.z]
		}
	)


static func create_narrative(
	event_id: int,
	event_type: StringName,
	tick: int,
	actor_id: int,
	source_id: StringName,
	action_display: String = "",
	world_position: Vector3 = Vector3.ZERO,
	action_id: StringName = &"",
	item_id: StringName = &"",
	required_amount: float = 0.0
) -> EconomicEventRecord:
	return EconomicEventRecord.new(
		{
			"schema_version": SCHEMA_VERSION,
			"event_id": event_id,
			"event_type": String(event_type),
			"tick": tick,
			"actor_id": actor_id,
			"source_id": String(source_id),
			"destination_id": "",
			"item_id": String(item_id),
			"amount": 0.0,
			"action_name": action_display,
			"action_id": String(action_id),
			"required_amount": required_amount,
			"world_position": [world_position.x, world_position.y, world_position.z]
		}
	)


static func from_dictionary(record_data: Dictionary) -> EconomicEventRecord:
	var version := int(record_data.get("schema_version", -1))
	if version not in [LEGACY_SCHEMA_VERSION, POSITION_LEGACY_SCHEMA_VERSION, SCHEMA_VERSION]:
		return null
	if not record_data.has_all(
		[
			"event_id",
			"event_type",
			"tick",
			"actor_id",
			"source_id",
			"destination_id",
			"item_id",
			"amount"
		]
	):
		return null
	if version == SCHEMA_VERSION and not record_data.has("world_position"):
		return null
	var normalized := record_data.duplicate(true)
	normalized["schema_version"] = SCHEMA_VERSION
	normalized["event_id"] = int(record_data["event_id"])
	normalized["event_type"] = String(record_data["event_type"])
	normalized["tick"] = int(record_data["tick"])
	normalized["actor_id"] = int(record_data["actor_id"])
	normalized["source_id"] = String(record_data["source_id"])
	normalized["destination_id"] = String(record_data["destination_id"])
	normalized["item_id"] = String(record_data["item_id"])
	normalized["amount"] = float(record_data["amount"])
	normalized["action_id"] = String(record_data.get("action_id", ""))
	normalized["required_amount"] = float(record_data.get("required_amount", 0.0))
	var saved_position = record_data.get("world_position", [0.0, 0.0, 0.0])
	if not saved_position is Array or saved_position.size() != 3:
		return null
	normalized["world_position"] = [
		float(saved_position[0]), float(saved_position[1]), float(saved_position[2])
	]
	if normalized["event_id"] < 0 or normalized["tick"] < 0 or normalized["event_type"].is_empty():
		return null
	if StringName(normalized["event_type"]) == SimulationIds.EVENT_TASK_BLOCKED:
		var has_stable_contract: bool = (
			not normalized["action_id"].is_empty()
			and not normalized["item_id"].is_empty()
			and normalized["required_amount"] > 0.0
		)
		if version == SCHEMA_VERSION and not has_stable_contract:
			return null
	return EconomicEventRecord.new(normalized)


func to_dictionary() -> Dictionary:
	return data.duplicate(true)


func get_world_position() -> Vector3:
	var saved_position: Array = data["world_position"]
	return Vector3(float(saved_position[0]), float(saved_position[1]), float(saved_position[2]))


func description(npc_names: Dictionary = {}) -> String:
	var actor_name: String = npc_names.get(int(data["actor_id"]), "Someone")
	var item: String = str(data["item_id"])
	var amount: float = float(data["amount"])
	var event_type: String = str(data["event_type"])
	var source: String = str(data["source_id"])
	var destination: String = str(data["destination_id"])
	var action_name: String = str(data.get("action_name", ""))
	match event_type:
		"resource_extracted":
			return "%s gathered %.0f %s from %s" % [actor_name, amount, item, source]
		"storage_deposited":
			return "%s deposited %.0f %s into %s" % [actor_name, amount, item, destination]
		"storage_withdrawn":
			return "%s withdrew %.0f %s from %s" % [actor_name, amount, item, source]
		"item_consumed":
			return "%s consumed %.0f %s" % [actor_name, amount, item]
		"npc_slept":
			return "%s slept and recovered energy" % actor_name
		"npc_died":
			return "%s died from starvation" % actor_name
		"task_started":
			return "%s began %s" % [actor_name, action_name if not action_name.is_empty() else item]
		"task_blocked":
			return "%s could not complete %s" % [actor_name, action_name]
		"resource_depleted":
			return "%s was depleted" % source
		"animal_fed":
			return "%s fed %s %.0f %s" % [actor_name, destination, amount, item]
		_:
			return "tick %d: %s" % [int(data["tick"]), event_type]