// Copyright (c) 2026 Reignance Studios. MIT License, see LICENSE.

#include "RSExampleDashAbility.h"

#include "GameFramework/Character.h"

URSExampleDashAbility::URSExampleDashAbility()
{
	// Client runs it at once and asks the server; the server confirms or rolls back.
	NetExecutionPolicy = EGameplayAbilityNetExecutionPolicy::LocalPredicted;

	// One instance per actor: no new UObject per activation, and state survives
	// between the predicted and the confirmed run.
	InstancingPolicy = EGameplayAbilityInstancingPolicy::InstancedPerActor;

	// Set in the Blueprint child or here:
	//   CostGameplayEffectClass     = GE_Cost_Dash      (Instant, Stamina -25)
	//   CooldownGameplayEffectClass = GE_Cooldown_Dash  (HasDuration 1.5 s, grants Cooldown.Dash)
}

void URSExampleDashAbility::ActivateAbility(
	const FGameplayAbilitySpecHandle Handle,
	const FGameplayAbilityActorInfo* ActorInfo,
	const FGameplayAbilityActivationInfo ActivationInfo,
	const FGameplayEventData* TriggerEventData)
{
	// Commit first, inside the activation's prediction window. Committing after a
	// latent task (a delay, a montage wait, target data) runs outside that window:
	// the client cannot predict the cost or cooldown, so the UI jumps when the
	// server value lands.
	if (!CommitAbility(Handle, ActorInfo, ActivationInfo))
	{
		EndAbility(Handle, ActorInfo, ActivationInfo, true, true);
		return;
	}

	if (ACharacter* Character = Cast<ACharacter>(ActorInfo->AvatarActor.Get()))
	{
		// Runs on the predicting client and on the server. Kept simple on purpose:
		// launch timing can differ by a frame and cause a small correction. For a
		// shipped dash, use a root motion source task or a custom CMC saved move.
		const FVector Direction = Character->GetActorForwardVector();
		Character->LaunchCharacter(Direction * DashStrength, true, false);
	}

	EndAbility(Handle, ActorInfo, ActivationInfo, true, false);
}