class_name OpportunityStateRecord
extends RefCounted

const SCHEMA_VERSION := 1
const NO_EVENT_ID := -1
const DEFAULT_TARGET_AMOUNT := 1.0
const STATUS_OPEN := SimulationIds.OPPORTUNITY_STATUS_OPEN
const STATUS_RESOLVED := SimulationIds.OPPORTUNITY_STATUS_RESOLVED

var data: Dictionary


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


static func create(
	opportunity_id: int,
	created_tick: int,
	trigger_event_id: int,
	interested_npc_id: int,
	target_amount: float = DEFAULT_TARGET_AMOUNT
) -> OpportunityStateRecord:
	return (
		OpportunityStateRecord
		. new(
			{
				"schema_version": SCHEMA_VERSION,
				"opportunity_id": opportunity_id,
				"opportunity_type": String(SimulationIds.OPPORTUNITY_RESTOCK_EMPTY_PANTRY),
				"status": String(STATUS_OPEN),
				"created_tick": created_tick,
				"trigger_event_id": trigger_event_id,
				"interested_npc_id": interested_npc_id,
				"target_id": String(SimulationIds.STORAGE_VILLAGE_PANTRY),
				"resource_id": String(SimulationIds.RESOURCE_FOOD),
				"target_amount": target_amount,
				"resolution_event_id": NO_EVENT_ID,
				"resolved_tick": -1,
			}
		)
	)


static func from_dictionary(record_data: Dictionary) -> OpportunityStateRecord:
	if int(record_data.get("schema_version", -1)) != SCHEMA_VERSION:
		return null
	if not (
		record_data
		. has_all(
			[
				"opportunity_id",
				"opportunity_type",
				"status",
				"created_tick",
				"trigger_event_id",
				"interested_npc_id",
				"target_id",
				"resource_id",
				"target_amount",
				"resolution_event_id",
				"resolved_tick",
			]
		)
	):
		return null
	var opportunity_id := int(record_data["opportunity_id"])
	var opportunity_type := StringName(record_data["opportunity_type"])
	var status := StringName(record_data["status"])
	var created_tick := int(record_data["created_tick"])
	var trigger_event_id := int(record_data["trigger_event_id"])
	var interested_npc_id := int(record_data["interested_npc_id"])
	var target_id := StringName(record_data["target_id"])
	var resource_id := StringName(record_data["resource_id"])
	var target_amount := float(record_data["target_amount"])
	var resolution_event_id := int(record_data["resolution_event_id"])
	var resolved_tick := int(record_data["resolved_tick"])
	if opportunity_id < 0 or created_tick < 0 or trigger_event_id < 0 or interested_npc_id < 0:
		return null
	if opportunity_type != SimulationIds.OPPORTUNITY_RESTOCK_EMPTY_PANTRY:
		return null
	if target_id != SimulationIds.STORAGE_VILLAGE_PANTRY:
		return null
	if resource_id != SimulationIds.RESOURCE_FOOD:
		return null
	if not is_finite(target_amount) or not is_equal_approx(target_amount, DEFAULT_TARGET_AMOUNT):
		return null
	match status:
		STATUS_OPEN:
			if resolution_event_id != NO_EVENT_ID or resolved_tick != -1:
				return null
		STATUS_RESOLVED:
			if resolution_event_id <= trigger_event_id or resolved_tick < created_tick:
				return null
		_:
			return null
	var record := create(
		opportunity_id, created_tick, trigger_event_id, interested_npc_id, target_amount
	)
	if status == STATUS_RESOLVED:
		record.resolve(resolution_event_id, resolved_tick)
	return record


func resolve(resolution_event_id: int, resolved_tick: int) -> bool:
	if (
		not is_open()
		or resolution_event_id <= get_trigger_event_id()
		or resolved_tick < get_created_tick()
	):
		return false
	data["status"] = String(STATUS_RESOLVED)
	data["resolution_event_id"] = resolution_event_id
	data["resolved_tick"] = resolved_tick
	return true


func get_opportunity_id() -> int:
	return int(data["opportunity_id"])


func get_opportunity_type() -> StringName:
	return StringName(data["opportunity_type"])


func get_status() -> StringName:
	return StringName(data["status"])


func get_created_tick() -> int:
	return int(data["created_tick"])


func get_trigger_event_id() -> int:
	return int(data["trigger_event_id"])


func get_interested_npc_id() -> int:
	return int(data["interested_npc_id"])


func get_target_id() -> StringName:
	return StringName(data["target_id"])


func get_resource_id() -> StringName:
	return StringName(data["resource_id"])


func get_target_amount() -> float:
	return float(data["target_amount"])


func get_resolution_event_id() -> int:
	return int(data["resolution_event_id"])


func get_resolved_tick() -> int:
	return int(data["resolved_tick"])


func is_open() -> bool:
	return get_status() == STATUS_OPEN


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