class_name SimulationCommand
extends RefCounted

var command_id := 0
var issued_tick := 0
var execute_tick := 0
var priority := 0
var command_type: StringName = &""
var actor_id: StringName = &""
var target_id: StringName = &""
var payload: Dictionary = {}
var idempotency_key: StringName = &""


func _init(
	p_command_id: int = 0,
	p_issued_tick: int = 0,
	p_execute_tick: int = 0,
	p_priority: int = 0,
	p_command_type: StringName = &"",
	p_actor_id: StringName = &"",
	p_target_id: StringName = &"",
	p_payload: Dictionary = {},
	p_idempotency_key: StringName = &""
) -> void:
	command_id = p_command_id
	issued_tick = p_issued_tick
	execute_tick = p_execute_tick
	priority = p_priority
	command_type = p_command_type
	actor_id = p_actor_id
	target_id = p_target_id
	payload = p_payload.duplicate(true)
	idempotency_key = p_idempotency_key


func validation_error() -> String:
	if command_id <= 0:
		return "command_id must be greater than zero."
	if issued_tick < 0:
		return "issued_tick cannot be negative."
	if execute_tick < issued_tick:
		return "execute_tick cannot be earlier than issued_tick."
	return ""


func is_valid() -> bool:
	return validation_error().is_empty()


func copy() -> SimulationCommand:
	return SimulationCommand.new(
		command_id,
		issued_tick,
		execute_tick,
		priority,
		command_type,
		actor_id,
		target_id,
		payload,
		idempotency_key
	)


func to_dictionary() -> Dictionary:
	return {
		"command_id": command_id,
		"issued_tick": issued_tick,
		"execute_tick": execute_tick,
		"priority": priority,
		"command_type": String(command_type),
		"actor_id": String(actor_id),
		"target_id": String(target_id),
		"payload": payload.duplicate(true),
		"idempotency_key": String(idempotency_key),
	}


static func from_dictionary(data: Dictionary) -> SimulationCommand:
	return SimulationCommand.new(
		int(data.get("command_id", 0)),
		int(data.get("issued_tick", 0)),
		int(data.get("execute_tick", 0)),
		int(data.get("priority", 0)),
		StringName(data.get("command_type", "")),
		StringName(data.get("actor_id", "")),
		StringName(data.get("target_id", "")),
		data.get("payload", {}) as Dictionary,
		StringName(data.get("idempotency_key", ""))
	)