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package at.hannibal2.skyhanni.api.event
import at.hannibal2.skyhanni.SkyHanniMod
import at.hannibal2.skyhanni.data.IslandType
import at.hannibal2.skyhanni.mixins.hooks.getValue
import at.hannibal2.skyhanni.mixins.hooks.setValue
import at.hannibal2.skyhanni.test.command.ErrorManager
import at.hannibal2.skyhanni.utils.ChatUtils
import at.hannibal2.skyhanni.utils.LorenzUtils
import at.hannibal2.skyhanni.utils.LorenzUtils.inAnyIsland
import at.hannibal2.skyhanni.utils.StringUtils
import at.hannibal2.skyhanni.utils.chat.Text
import at.hannibal2.skyhanni.utils.system.PlatformUtils
class EventHandler<T : SkyHanniEvent> private constructor(
val name: String,
private val listeners: List<EventListeners.Listener>,
private val canReceiveCancelled: Boolean,
) {
var invokeCount: Long = 0L
private set
constructor(event: Class<T>, listeners: List<EventListeners.Listener>) : this(
(event.name.split(".").lastOrNull() ?: event.name).replace("$", "."),
listeners.sortedBy { it.options.priority }.toList(),
listeners.any { it.options.receiveCancelled },
)
companion object {
private var eventHandlerDepth by object : ThreadLocal<Int>() {
override fun initialValue(): Int {
return 0
}
}
/**
* Returns true if the current thread is in an event handler. This is because the event handler catches exceptions which means
* that we are free to throw exceptions in the event handler without crashing the game.
* We also return true if we are in a dev environment to alert the developer of any errors effectively.
*/
val isInEventHandler get() = eventHandlerDepth > 0 || PlatformUtils.isDevEnvironment
}
fun post(event: T, onError: ((Throwable) -> Unit)? = null): Boolean {
invokeCount++
if (this.listeners.isEmpty()) return false
if (SkyHanniEvents.isDisabledHandler(name)) return false
var errors = 0
eventHandlerDepth++
for (listener in listeners) {
if (!shouldInvoke(event, listener)) continue
try {
listener.invoker.accept(event)
} catch (throwable: Throwable) {
errors++
if (errors <= 3) {
val errorName = throwable::class.simpleName ?: "error"
val aOrAn = StringUtils.optionalAn(errorName)
val message = "Caught $aOrAn $errorName in ${listener.name} at $name: ${throwable.message}"
ErrorManager.logErrorWithData(throwable, message, ignoreErrorCache = onError != null)
}
onError?.invoke(throwable)
}
if (event.isCancelled && !canReceiveCancelled) break
}
eventHandlerDepth--
if (errors > 3) {
val hiddenErrors = errors - 3
ChatUtils.chat(
Text.text(
"§c[SkyHanni/${SkyHanniMod.version}] $hiddenErrors more errors in $name are hidden!",
),
)
}
return event.isCancelled
}
private fun shouldInvoke(event: SkyHanniEvent, listener: EventListeners.Listener): Boolean {
if (SkyHanniEvents.isDisabledInvoker(listener.name)) return false
if (listener.options.onlyOnSkyblock && !LorenzUtils.inSkyBlock) return false
if (IslandType.ANY !in listener.onlyOnIslandTypes && !inAnyIsland(listener.onlyOnIslandTypes)) return false
if (event.isCancelled && !listener.options.receiveCancelled) return false
if (
event is GenericSkyHanniEvent<*> &&
listener.generic != null &&
!listener.generic.isAssignableFrom(event.type)
) {
return false
}
return true
}
}
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