#include "CharacterStatsComponent.h"
#include "SkillTreeComponent.h"
#include "GameFramework/Character.h"
#include "GameFramework/CharacterMovementComponent.h"

UCharacterStatsComponent::UCharacterStatsComponent()
{
    PrimaryComponentTick.bCanEverTick = false;

    // Default base stats
    BaseMaxHealth = 100.0f;
    BaseDamage = 10.0f;
    BaseSpeed = 600.0f;

    // Initialize current values
    CurrentHealth = BaseMaxHealth;
    MaxHealth = BaseMaxHealth;
    CurrentDamage = BaseDamage;
    CurrentSpeed = BaseSpeed;

    // Initialize bonuses to 0
    SkillHealthBonus = 0.0f;
    SkillDamageBonus = 0.0f;
    SkillSpeedBonus = 0.0f;
    SkillHealthBonusPercent = 0.0f;
    SkillDamageBonusPercent = 0.0f;
    SkillSpeedBonusPercent = 0.0f;
}

void UCharacterStatsComponent::BeginPlay()
{
    Super::BeginPlay();

    // Find the skill tree component on the same actor
    AActor* Owner = GetOwner();
    if (Owner)
    {
        OwnerSkillTree = Owner->FindComponentByClass<USkillTreeComponent>();

        // Bind to skill tree events
        if (OwnerSkillTree)
        {
            OwnerSkillTree->OnSkillPurchased.AddDynamic(this, &UCharacterStatsComponent::OnSkillPurchased);
        }
    }

    InitializeStats();
}

void UCharacterStatsComponent::InitializeStats()
{
    MaxHealth = BaseMaxHealth;
    CurrentHealth = MaxHealth;
    CurrentDamage = BaseDamage;
    CurrentSpeed = BaseSpeed;

    RecalculateStats();
}

void UCharacterStatsComponent::OnSkillPurchased(FName SkillID)
{
    // Called when a skill is purchased, update all stats
    UpdateStatsFromSkillTree();
}

void UCharacterStatsComponent::UpdateStatsFromSkillTree()
{
    if (!OwnerSkillTree)
    {
        return;
    }

    // Reset skill bonuses
    SkillHealthBonus = 0.0f;
    SkillDamageBonus = 0.0f;
    SkillSpeedBonus = 0.0f;
    SkillHealthBonusPercent = 0.0f;
    SkillDamageBonusPercent = 0.0f;
    SkillSpeedBonusPercent = 0.0f;

    // Calculate total bonuses from purchased skills
    TArray<FSkillNodeRuntime> AllSkills = OwnerSkillTree->GetAllSkillNodes();
    for (const FSkillNodeRuntime& Skill : AllSkills)
    {
        if (Skill.CurrentState == ESkillNodeState::Purchased)
        {
            // Add flat bonuses
            SkillHealthBonus += Skill.NodeData.HealthBonus;
            SkillDamageBonus += Skill.NodeData.DamageBonus;
            SkillSpeedBonus += Skill.NodeData.SpeedBonus;

            // Add percentage bonuses
            SkillHealthBonusPercent += Skill.NodeData.HealthBonusPercent;
            SkillDamageBonusPercent += Skill.NodeData.DamageBonusPercent;
            SkillSpeedBonusPercent += Skill.NodeData.SpeedBonusPercent;
        }
    }

    RecalculateStats();
}

void UCharacterStatsComponent::RecalculateStats()
{
    // Calculate final stats: Base + Flat Bonus + (Base * Percentage Bonus)
    float OldMaxHealth = MaxHealth;

    MaxHealth = BaseMaxHealth + SkillHealthBonus + (BaseMaxHealth * SkillHealthBonusPercent / 100.0f);
    CurrentDamage = BaseDamage + SkillDamageBonus + (BaseDamage * SkillDamageBonusPercent / 100.0f);
    CurrentSpeed = BaseSpeed + SkillSpeedBonus + (BaseSpeed * SkillSpeedBonusPercent / 100.0f);

    // Scale current health proportionally if max health changed
    if (OldMaxHealth > 0 && MaxHealth != OldMaxHealth)
    {
        float HealthPercent = CurrentHealth / OldMaxHealth;
        CurrentHealth = MaxHealth * HealthPercent;
    }

    // Apply speed to character movement
    ApplySpeedToMovement();

    // Broadcast events
    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
    OnDamageChanged.Broadcast(CurrentDamage);
    OnSpeedChanged.Broadcast(CurrentSpeed);
    OnStatsUpdated.Broadcast();

    UE_LOG(LogTemp, Log, TEXT("Stats Updated - Health: %.0f/%.0f, Damage: %.0f, Speed: %.0f"),
        CurrentHealth, MaxHealth, CurrentDamage, CurrentSpeed);
}

void UCharacterStatsComponent::TakeDamage(float DamageAmount)
{
    if (DamageAmount <= 0.0f)
    {
        return;
    }

    CurrentHealth = FMath::Clamp(CurrentHealth - DamageAmount, 0.0f, MaxHealth);
    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);

    if (CurrentHealth <= 0.0f)
    {
        UE_LOG(LogTemp, Warning, TEXT("Character has died!"));
    }
}

void UCharacterStatsComponent::Heal(float HealAmount)
{
    if (HealAmount <= 0.0f)
    {
        return;
    }

    CurrentHealth = FMath::Clamp(CurrentHealth + HealAmount, 0.0f, MaxHealth);
    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
}

void UCharacterStatsComponent::SetHealth(float NewHealth)
{
    CurrentHealth = FMath::Clamp(NewHealth, 0.0f, MaxHealth);
    OnHealthChanged.Broadcast(CurrentHealth, MaxHealth);
}

FText UCharacterStatsComponent::GetHealthText() const
{
    return FText::Format(FText::FromString(TEXT("{0:.0f} / {1:.0f}")),
        FText::AsNumber(CurrentHealth),
        FText::AsNumber(MaxHealth));
}

FText UCharacterStatsComponent::GetDamageText() const
{
    return FText::Format(FText::FromString(TEXT("Damage: {0:.0f}")),
        FText::AsNumber(CurrentDamage));
}

FText UCharacterStatsComponent::GetSpeedText() const
{
    return FText::Format(FText::FromString(TEXT("Speed: {0:.0f}")),
        FText::AsNumber(CurrentSpeed));
}

void UCharacterStatsComponent::ApplySpeedToMovement()
{
    // Apply speed to character movement component
    ACharacter* CharacterOwner = Cast<ACharacter>(GetOwner());
    if (CharacterOwner && CharacterOwner->GetCharacterMovement())
    {
        CharacterOwner->GetCharacterMovement()->MaxWalkSpeed = CurrentSpeed;
        UE_LOG(LogTemp, Log, TEXT("Applied movement speed: %.0f"), CurrentSpeed);
    }
}