#pragma once
#include "CharacterState.h"
#include "BoneAnimatedModelNew.h"
#include "render/Renderer.h"
#include "render/TextureManager.h"
#include "SparkEmitter.h"
#include <functional>
#include <memory>
#include <map>
#include <string>
#include <cstdint>
#include <vector>
#include <unordered_map>
#include "dialogue/TranslationDatabase.h"
#include "AudioPlayerAsync.h"

namespace ZL {

class TextRenderer;

class Character {
public:
    // Resolves a character index to a live Character pointer.
    // kNoTarget (-1) → nullptr, kPlayerIndex (-2) → Location::player, 0..n → npcs[n].
    using CharacterResolver = std::function<Character*(int index)>;

    using PathPlanner = std::function<std::vector<Eigen::Vector3f>(
        const Eigen::Vector3f& start,
        const Eigen::Vector3f& end)>;

    // All serializable game state (position, hp, flags, pathfinding, etc.)
    CharacterState state;

    int index = CharacterState::kNoTarget;

    // ---- Asset loading ----
    void loadAnimation(AnimationState animState, const std::string& filename, const std::string& zipFile = "");
    void loadBinaryAnimation(AnimationState animState, const std::string& filename, const std::string& zipFile = "");

    // Assigns a texture to a specific mesh by name.
    void setTexture(const std::string& meshName, std::shared_ptr<Texture> texture);
    // Assigns one texture to every mesh in every loaded animation.  Call AFTER loading animations.
    void setTexture(std::shared_ptr<ZL::Texture> texture);

    // Creates a fully-loaded Character from a CharacterState (including its creationInfo).
    // Loads all animations, textures, and weapon mesh/texture from the paths stored in creationInfo.
    static std::unique_ptr<Character> createFromState(CharacterState st, Renderer& renderer, const char* zipFile);

    // ---- Per-frame update ----
    // resolver maps character indices to live pointers so attackTargetIndex / faceTargetIndex
    // can be dereferenced inside update().  Pass nullptr only if no targets are set.
    void update(int64_t deltaMs, const CharacterResolver& resolver = nullptr);

    void setPathPlanner(PathPlanner planner);

    // ---- Navigation (path data lives in state; pathPlanner lives here) ----
    // callbackName, if given, is the global Lua function name backing onArrived —
    // stored in state.onArrivedCallbackName so it survives save/load (see ScriptEngine::rehydrateNamedCallback).
    void setTarget(const Eigen::Vector3f& target, std::function<void()> onArrived = nullptr, std::string callbackName = "");
    void stopAndRotateToTarget(int npcId);

    void forceReplan();
    void stopInPlace() { state.stopInPlace(); }

    // ---- Reset ----
    void resetPlayerAfterDeath();

    void tryAttackCombo();

    // ---- Damage ----
    void applyDamage(float damageAmount, const Eigen::Vector3f& attackDirection = Eigen::Vector3f::Zero(), int attackerIndex = CharacterState::kNoTarget);

    // ---- Spark setup ----
    void setupHitSparks(std::shared_ptr<Texture> sparkTexture);
    void prepareHitSparksForDraw(const Eigen::Matrix4f& cameraViewMatrix);

    // ---- HUD overlays ----
    void drawName(TextRenderer& textRenderer,
                  const Eigen::Matrix4f& cameraViewMatrix,
                  const Eigen::Matrix4f& projectionMatrix);
    void drawHealthBar(Renderer& renderer,
                       const Eigen::Matrix4f& cameraViewMatrix,
                       const Eigen::Matrix4f& projectionMatrix);

    // ---- Draw passes ----
    void draw(Renderer& renderer);
    void drawShadowDepth(Renderer& renderer);
    void drawWithShadow(Renderer& renderer, const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const Eigen::Vector3f& lightDirCamera);
    void drawNight(Renderer& renderer,
        const float* pointLightPosEye, const float* pointLightDirEye,
        const float* pointLightColors, int pointLightCount,
        const float* pointLightWorldXZ, const float* pointLightLimitXZ,
        const Eigen::Matrix4f& cameraViewInverse,
        const float* ambientColor, const float* fogColor);
    void drawNightWithShadow(Renderer& renderer,
        const float* plPosEye, const float* plDirEye, const float* plColors, int plCount,
        const float* plWorldXZ, const float* plLimitXZ,
        const Eigen::Matrix4f& cameraViewInverse,
        const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex,
        const float* ambientColor, const float* fogColor);

    // ---- Query helpers (delegate to state) ----
    bool                   isMoving()                   const { return state.isMoving(); }
    const Eigen::Vector3f& getRequestedWalkTarget()     const { return state.getRequestedWalkTarget(); }
    Eigen::Vector3f        getCurrentNavigationTarget()  const { return state.getCurrentNavigationTarget(); }
    float                  getHp()                      const { return state.getHp(); }
    void                   setHp(float newHp)                 { state.setHp(newHp); }

    float getSpeedMultiplier(float transitionProgress) const;

    // ---- Weapon rendering data (initialized from state.creationInfo by createFromState) ----
    VertexRenderStruct       weaponMesh;
    std::shared_ptr<Texture> weaponTexture;
    Eigen::Matrix3f          weaponInitialRotation = Eigen::Matrix3f::Identity();
    Eigen::Vector3f          weaponInitialPosition = Eigen::Vector3f::Zero();
    std::string              weaponAttachBoneName  = "RightHand";

    SparkEmitter hitSparkEmitter;
    AudioPlayerAsync* audioPlayer;

    static Dialogue::TranslationDatabase nameTranslations;

private:
    std::map<AnimationState, BoneAnimationDataNew> animations;
    VertexRenderStruct modelMutable;
    VertexRenderStruct healthBarMesh;
    std::unordered_map<std::string, std::shared_ptr<Texture>> meshTextures;

    PathPlanner pathPlanner;

    static constexpr float TARGET_REPLAN_THRESHOLD  = 0.25f;
    static constexpr float HOME_DRIFT_CHECK_INTERVAL = 5.0f;

    AnimationState resolveActiveState() const;
    bool           prepareGpuSkinning();
    void           drawAttachedWeapon(Renderer& renderer);

    void drawGpuSkinning(Renderer& renderer);
    void drawShadowDepthGpuSkinning(Renderer& renderer);
    void drawShadowDepthCpu(Renderer& renderer);
    void drawGpuSkinningWithShadow(Renderer& renderer, const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const Eigen::Vector3f& lightDirCamera);
    void drawCpuWithShadow(Renderer& renderer, const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const Eigen::Vector3f& lightDirCamera);
    void drawNightGpuSkinning(Renderer& renderer,
        const float* plPosEye, const float* plDirEye, const float* plColors, int plCount,
        const float* plWorldXZ, const float* plLimitXZ, const Eigen::Matrix4f& cameraViewInverse,
        const float* ambientColor, const float* fogColor);
    void drawNightCpu(Renderer& renderer,
        const float* plPosEye, const float* plDirEye, const float* plColors, int plCount,
        const float* plWorldXZ, const float* plLimitXZ, const Eigen::Matrix4f& cameraViewInverse,
        const float* ambientColor, const float* fogColor);
    void drawNightGpuSkinningWithShadow(Renderer& renderer,
        const float* plPosEye, const float* plDirEye, const float* plColors, int plCount,
        const float* plWorldXZ, const float* plLimitXZ, const Eigen::Matrix4f& cameraViewInverse,
        const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const float* ambientColor, const float* fogColor);
    void drawNightCpuWithShadow(Renderer& renderer,
        const float* plPosEye, const float* plDirEye, const float* plColors, int plCount,
        const float* plWorldXZ, const float* plLimitXZ, const Eigen::Matrix4f& cameraViewInverse,
        const Eigen::Matrix4f& lightFromCamera, GLuint shadowMapTex, const float* ambientColor, const float* fogColor);
};

} // namespace ZL