#pragma once
// Authoritative game simulation: sessions/accounts, player movement, wild
// creatures, fishing, catching, followers, Professor Henry, chat, world clock.

#include "Appearance.h"
#include "Database.h"
#include "Movement.h"
#include "Net.h"
#include "Protocol.h"
#include "Rng.h"
#include "Roster.h"
#include "Spawns.h"
#include "Zone.h"

#include <cstdint>
#include <deque>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>

namespace bs {

struct GameConfig {
    std::string serverName = "Brandling Safari";
    uint32_t seed = 1;
    std::string zoneId = "meadow";
    float dayMinutes = 30.0f;
    float hour = -1.0f;      // < 0: resume the saved clock (default 9:00)
    int weather = -1;        // < 0: resume the saved weather
};

// Professor Henry always has this entity id; dynamic entities start above it.
constexpr uint32_t kHenryEntityId = 1;

enum class LineState { None, Waiting, Biting };

struct Player {
    uint32_t peer = 0;
    uint32_t entity = 0;         // 0 until the character is spawned
    bool helloDone = false;
    bool hasCharacter = false;
    bool spawned = false;
    PlayerRow row;               // persistent fields (id, token, name, look, capsules, intro)
    MoveState move;
    uint32_t lastSeq = 0;
    float inputBudget = 2.0f;
    int idleTicks = 0;           // ticks without an applied input (stops the walk anim)

    std::vector<OwnedCreature> creatures;
    std::set<uint16_t> seen, caught;

    float throwTimer = 0.0f;
    LineState line = LineState::None;
    glm::vec2 bobber{0.0f}, castPos{0.0f};
    float lineTimer = 0.0f, fishCooldown = 0.0f;

    float grassDist = 0.0f;
    float rustleCooldown = 0.0f;  // misses shake the grass at most about once a second
    std::deque<glm::vec2> trail;  // newest first
    float introTimer = -1.0f;     // > 0: henry_intro dialogue pending
    bool introOffered = false;    // henry_intro was sent and not answered yet
    double lastChat = -10.0;
    bool posDirty = false;
};

enum class CMode { Wander, Emerge, Alert, Capturing, Flee, Hooked, Swim, Follow };
enum class COrigin { Wanderer, Grass, Swimmer, Fished, Console, Caught };

struct Creature {
    uint32_t id = 0;
    uint16_t species = 0;
    EntityKind kind = EntityKind::Wild;
    COrigin origin = COrigin::Wanderer;
    CMode mode = CMode::Wander;
    Anim anim = Anim::Idle;
    glm::vec2 pos{0.0f};
    float y = 0.0f;
    float yaw = 0.0f;
    uint32_t owner = 0;        // follower owner / player hooking, capturing or scaring it
    uint8_t order = 0;
    uint32_t uid = 0;          // follower: owned creature uid
    bool dead = false;         // removed at the end of the tick
    uint32_t emergedFor = 0;   // grass spawn: player entity it popped up for (per-player cap)

    float timer = 0.0f;        // time left in the current mode / pause
    bool walking = false;
    glm::vec2 target{0.0f};
    float lifetime = 120.0f;   // despawn once this runs out and nobody is within 12 units
    bool hookBonus = false;    // Alert after being fished out
    int failedThrows = 0;
    std::set<uint32_t> seenBy; // player entities that already had it registered as seen

    // capture in flight
    float captureTimer = 0.0f;
    bool captureSuccess = false;
    int wobbles = 0;
    CMode resumeMode = CMode::Wander;

    // hook arc
    glm::vec2 arcFrom{0.0f}, arcTo{0.0f};
    float arcFromY = 0.0f;
};

class Game {
public:
    Game(net::Host& host, Database& db, Zone& zone, const Roster& roster, const CharacterManifest& manifest,
         GameConfig cfg);

    void onConnect(uint32_t peer);
    void onDisconnect(uint32_t peer);
    void onReceive(uint32_t peer, const std::vector<uint8_t>& data);
    void tick();
    void saveAll();
    // Console command; returns false for "quit".
    bool console(const std::string& line);

    int playerCount() const;
    const std::string& serverName() const { return cfg_.serverName; }

private:
    // --- sessions
    Player* byPeer(uint32_t peer);
    Player* byEntity(uint32_t entity);
    void handleHello(Player& p, Reader& r);
    void handleCreate(Player& p, Reader& r);
    void handleInput(Player& p, Reader& r);
    void handleAction(Player& p, Reader& r);
    void handleChat(Player& p, Reader& r);
    void handleDialogueDone(Player& p, Reader& r);
    void spawnPlayer(Player& p);
    void despawnPlayer(Player& p);  // save + PlayerLeft + remove followers
    void reject(uint32_t peer, const std::string& reason);

    // --- messaging
    void send(const Player& p, const Writer& w, bool reliable = true);
    void broadcast(const Writer& w, bool reliable = true);
    void sendProfile(Player& p);
    void sendEvent(const GameEvent& e);
    void sendToast(Player& p, const std::string& text);
    void sendDialogue(Player& p, const std::string& id);
    PlayerInfoMsg playerInfo(const Player& p) const;
    void sendSnapshots();

    // --- persistence
    void savePlayer(Player& p);
    void saveWorld();

    // --- players
    void applyInput(Player& p, const InputCmd& c);
    void updatePlayer(Player& p, float dt);
    void cancelLine(Player& p);
    void noteSeen(Player& p, uint16_t species);
    glm::vec3 pos3(glm::vec2 p) const { return {p.x, zone_.groundHeight(p), p.y}; }
    Anim playerAnim(const Player& p) const;

    // --- creatures
    Creature& addCreature(uint16_t species, glm::vec2 pos, COrigin origin);
    void removeCreature(uint32_t id);
    void announceAppeared(const Creature& c);
    void updateCreatures(float dt);
    void updateWild(Creature& c, float dt);
    void updateFollowers(Player& p, float dt);
    void wander(Creature& c, float dt, float speed);
    bool pickWanderTarget(Creature& c);
    void faceNearestPlayer(Creature& c);
    float nearestPlayerDist(glm::vec2 p, Player** who = nullptr);
    int emergedCount(const Player& p) const;
    void maintainPopulation(float dt);
    bool spawnWanderer();
    bool spawnSwimmer(bool announce);
    void grassEncounters(Player& p);
    void resolveCapture(Creature& c);
    void syncFollowers(Player& p);
    Creature* spawnForConsole(uint16_t species);

    // --- actions
    void actionThrow(Player& p, uint32_t target);
    void actionCast(Player& p, glm::vec2 dir);
    void actionReel(Player& p);
    void actionInteract(Player& p, uint32_t target);
    void actionToggleParty(Player& p, uint32_t uid);
    void finishIntro(Player& p);
    bool landingSpot(glm::vec2 bobber, glm::vec2 player, glm::vec2& out) const;

    // --- world
    void updateWorld(float dt);
    void updateHenry(float dt);
    void setWeather(Weather w);

    net::Host& host_;
    Database& db_;
    Zone& zone_;
    const Roster& roster_;
    const CharacterManifest& manifest_;
    GameConfig cfg_;
    Rng rng_;
    SpawnTables tables_;

    std::map<uint32_t, std::unique_ptr<Player>> players_;  // by peer
    std::map<uint32_t, Creature> creatures_;               // wild + followers by entity id
    uint32_t nextEntity_ = kHenryEntityId + 1;
    uint32_t tick_ = 0;
    double time_ = 0.0;       // seconds since start

    float hour_ = 9.0f;
    Weather weather_ = Weather::Clear;
    float weatherTimer_ = 300.0f;
    float weatherBlend_ = 1.0f;
    float saveTimer_ = 10.0f;

    float henryYaw_ = 0.0f;
    float wanderSpawnTimer_ = 0.0f;
    float swimmerTimer_ = 10.0f;     // next surface/dive
    float swimmerRespawn_ = -1.0f;   // > 0: a dived swimmer resurfaces elsewhere
};

}  // namespace bs