#pragma once

#include "network/packet.hpp"
#include "game/opcodes.hpp"
#include "game/character.hpp"
#include "game/entity.hpp"
#include "game/spell_defines.hpp"
#include "game/group_defines.hpp"
#include <vector>
#include <cstdint>
#include <string>
#include <map>
#include <unordered_map>

namespace wowee {
namespace game {

/**
 * SMSG_AUTH_CHALLENGE data (from server)
 *
 * Sent by world server immediately after TCP connect
 * Contains server seed/salt for authentication hash
 */
struct AuthChallengeData {
    uint32_t unknown1;      // Always seems to be 0x00000001
    uint32_t serverSeed;    // Random seed from server
    // Note: 3.3.5a has additional data after this

    bool isValid() const { return unknown1 != 0; }
};

/**
 * CMSG_AUTH_SESSION packet builder
 *
 * Client authentication to world server using session key from auth server
 */
class AuthSessionPacket {
public:
    /**
     * Build CMSG_AUTH_SESSION packet
     *
     * @param build Client build number (12340 for 3.3.5a)
     * @param accountName Account name (uppercase)
     * @param clientSeed Random 4-byte seed generated by client
     * @param sessionKey 40-byte session key from auth server
     * @param serverSeed 4-byte seed from SMSG_AUTH_CHALLENGE
     * @return Packet ready to send
     */
    static network::Packet build(uint32_t build,
                                  const std::string& accountName,
                                  uint32_t clientSeed,
                                  const std::vector<uint8_t>& sessionKey,
                                  uint32_t serverSeed,
                                  uint32_t realmId = 1);

private:
    /**
     * Compute authentication hash
     *
     * SHA1(account + [0,0,0,0] + clientSeed + serverSeed + sessionKey)
     *
     * @param accountName Account name
     * @param clientSeed Client seed
     * @param serverSeed Server seed
     * @param sessionKey 40-byte session key
     * @return 20-byte SHA1 hash
     */
    static std::vector<uint8_t> computeAuthHash(
        const std::string& accountName,
        uint32_t clientSeed,
        uint32_t serverSeed,
        const std::vector<uint8_t>& sessionKey);
};

/**
 * SMSG_AUTH_CHALLENGE response parser
 */
class AuthChallengeParser {
public:
    static bool parse(network::Packet& packet, AuthChallengeData& data);
};

/**
 * SMSG_AUTH_RESPONSE result codes
 */
enum class AuthResult : uint8_t {
    // TrinityCore/AzerothCore auth response codes (3.3.5a)
    OK = 0x0C,                      // Success, proceed to character screen
    FAILED = 0x0D,                  // Generic failure
    REJECT = 0x0E,                  // Reject
    BAD_SERVER_PROOF = 0x0F,        // Bad server proof
    UNAVAILABLE = 0x10,             // Unavailable
    SYSTEM_ERROR = 0x11,            // System error
    BILLING_ERROR = 0x12,           // Billing error
    BILLING_EXPIRED = 0x13,         // Billing expired
    VERSION_MISMATCH = 0x14,        // Version mismatch
    UNKNOWN_ACCOUNT = 0x15,         // Unknown account
    INCORRECT_PASSWORD = 0x16,      // Incorrect password
    SESSION_EXPIRED = 0x17,         // Session expired
    SERVER_SHUTTING_DOWN = 0x18,    // Server shutting down
    ALREADY_LOGGING_IN = 0x19,      // Already logging in
    LOGIN_SERVER_NOT_FOUND = 0x1A,  // Login server not found
    WAIT_QUEUE = 0x1B,              // Wait queue
    BANNED = 0x1C,                  // Banned
    ALREADY_ONLINE = 0x1D,          // Already online
    NO_TIME = 0x1E,                 // No game time
    DB_BUSY = 0x1F,                 // DB busy
    SUSPENDED = 0x20,               // Suspended
    PARENTAL_CONTROL = 0x21,        // Parental control
    LOCKED_ENFORCED = 0x22          // Account locked
};

/**
 * SMSG_AUTH_RESPONSE data (from server)
 */
struct AuthResponseData {
    AuthResult result;

    bool isSuccess() const { return result == AuthResult::OK; }
};

/**
 * SMSG_AUTH_RESPONSE parser
 */
class AuthResponseParser {
public:
    static bool parse(network::Packet& packet, AuthResponseData& data);
};

/**
 * Get human-readable string for auth result
 */
const char* getAuthResultString(AuthResult result);

// Forward declare Character
struct Character;

/**
 * CMSG_CHAR_ENUM packet builder
 *
 * Request list of characters on account
 */
class CharEnumPacket {
public:
    /**
     * Build CMSG_CHAR_ENUM packet
     *
     * This packet has no body - just the opcode
     */
    static network::Packet build();
};

/**
 * SMSG_CHAR_ENUM response data (from server)
 *
 * Contains list of all characters on the account
 */
struct CharEnumResponse {
    std::vector<Character> characters;

    bool isEmpty() const { return characters.empty(); }
    size_t count() const { return characters.size(); }
};

/**
 * SMSG_CHAR_ENUM response parser
 */
class CharEnumParser {
public:
    static bool parse(network::Packet& packet, CharEnumResponse& response);
};

// ============================================================
// Character Creation
// ============================================================

// WoW 3.3.5a ResponseCodes for character creation (from ResponseCodes enum)
enum class CharCreateResult : uint8_t {
    // Success codes
    SUCCESS              = 0x2F,  // CHAR_CREATE_SUCCESS

    // CHAR_CREATE error codes
    IN_PROGRESS          = 0x2E,  // CHAR_CREATE_IN_PROGRESS
    ERROR                = 0x30,  // CHAR_CREATE_ERROR
    FAILED               = 0x31,  // CHAR_CREATE_FAILED
    NAME_IN_USE          = 0x32,  // CHAR_CREATE_NAME_IN_USE
    DISABLED             = 0x33,  // CHAR_CREATE_DISABLED
    PVP_TEAMS_VIOLATION  = 0x34,  // CHAR_CREATE_PVP_TEAMS_VIOLATION
    SERVER_LIMIT         = 0x35,  // CHAR_CREATE_SERVER_LIMIT
    ACCOUNT_LIMIT        = 0x36,  // CHAR_CREATE_ACCOUNT_LIMIT
    SERVER_QUEUE         = 0x37,  // CHAR_CREATE_SERVER_QUEUE
    ONLY_EXISTING        = 0x38,  // CHAR_CREATE_ONLY_EXISTING
    EXPANSION            = 0x39,  // CHAR_CREATE_EXPANSION
    EXPANSION_CLASS      = 0x3A,  // CHAR_CREATE_EXPANSION_CLASS
    LEVEL_REQUIREMENT    = 0x3B,  // CHAR_CREATE_LEVEL_REQUIREMENT
    UNIQUE_CLASS_LIMIT   = 0x3C,  // CHAR_CREATE_UNIQUE_CLASS_LIMIT
    CHARACTER_IN_GUILD   = 0x3D,  // CHAR_CREATE_CHARACTER_IN_GUILD
    RESTRICTED_RACECLASS = 0x3E,  // CHAR_CREATE_RESTRICTED_RACECLASS
    CHARACTER_CHOOSE_RACE= 0x3F,  // CHAR_CREATE_CHARACTER_CHOOSE_RACE
    CHARACTER_ARENA_LEADER=0x40,  // CHAR_CREATE_CHARACTER_ARENA_LEADER
    CHARACTER_DELETE_MAIL= 0x41,  // CHAR_CREATE_CHARACTER_DELETE_MAIL
    CHARACTER_SWAP_FACTION=0x42,  // CHAR_CREATE_CHARACTER_SWAP_FACTION
    CHARACTER_RACE_ONLY  = 0x43,  // CHAR_CREATE_CHARACTER_RACE_ONLY
    CHARACTER_GOLD_LIMIT = 0x44,  // CHAR_CREATE_CHARACTER_GOLD_LIMIT
    FORCE_LOGIN          = 0x45,  // CHAR_CREATE_FORCE_LOGIN

    // CHAR_NAME error codes (name validation failures)
    NAME_SUCCESS         = 0x57,  // CHAR_NAME_SUCCESS
    NAME_FAILURE         = 0x58,  // CHAR_NAME_FAILURE
    NAME_NO_NAME         = 0x59,  // CHAR_NAME_NO_NAME
    NAME_TOO_SHORT       = 0x5A,  // CHAR_NAME_TOO_SHORT
    NAME_TOO_LONG        = 0x5B,  // CHAR_NAME_TOO_LONG
    NAME_INVALID_CHARACTER = 0x5C,  // CHAR_NAME_INVALID_CHARACTER
    NAME_MIXED_LANGUAGES = 0x5D,  // CHAR_NAME_MIXED_LANGUAGES
    NAME_PROFANE         = 0x5E,  // CHAR_NAME_PROFANE
    NAME_RESERVED        = 0x5F,  // CHAR_NAME_RESERVED
    NAME_INVALID_APOSTROPHE = 0x60,  // CHAR_NAME_INVALID_APOSTROPHE
    NAME_MULTIPLE_APOSTROPHES = 0x61,  // CHAR_NAME_MULTIPLE_APOSTROPHES
    NAME_THREE_CONSECUTIVE = 0x62,  // CHAR_NAME_THREE_CONSECUTIVE (98 decimal)
    NAME_INVALID_SPACE   = 0x63,  // CHAR_NAME_INVALID_SPACE
    NAME_CONSECUTIVE_SPACES = 0x64,  // CHAR_NAME_CONSECUTIVE_SPACES
    NAME_RUSSIAN_CONSECUTIVE_SILENT = 0x65,  // CHAR_NAME_RUSSIAN_CONSECUTIVE_SILENT_CHARACTERS
    NAME_RUSSIAN_SILENT_AT_BEGIN_OR_END = 0x66,  // CHAR_NAME_RUSSIAN_SILENT_CHARACTER_AT_BEGINNING_OR_END
    NAME_DECLENSION_DOESNT_MATCH = 0x67,  // CHAR_NAME_DECLENSION_DOESNT_MATCH_BASE_NAME
};

struct CharCreateData {
    std::string name;
    Race race;
    Class characterClass;
    Gender gender;
    uint8_t skin = 0;
    uint8_t face = 0;
    uint8_t hairStyle = 0;
    uint8_t hairColor = 0;
    uint8_t facialHair = 0;
};

class CharCreatePacket {
public:
    static network::Packet build(const CharCreateData& data);
};

struct CharCreateResponseData {
    CharCreateResult result;
};

class CharCreateResponseParser {
public:
    static bool parse(network::Packet& packet, CharCreateResponseData& data);
};

/**
 * CMSG_PLAYER_LOGIN packet builder
 *
 * Select character and enter world
 */
class PlayerLoginPacket {
public:
    /**
     * Build CMSG_PLAYER_LOGIN packet
     *
     * @param characterGuid GUID of character to log in with
     */
    static network::Packet build(uint64_t characterGuid);
};

/**
 * SMSG_LOGIN_VERIFY_WORLD data (from server)
 *
 * Confirms successful world entry with initial position and map info
 */
struct LoginVerifyWorldData {
    uint32_t mapId;         // Map ID where character spawned
    float x, y, z;          // Initial position coordinates
    float orientation;      // Initial orientation (facing direction)

    bool isValid() const { return mapId != 0xFFFFFFFF; }
};

/**
 * SMSG_LOGIN_VERIFY_WORLD parser
 */
class LoginVerifyWorldParser {
public:
    static bool parse(network::Packet& packet, LoginVerifyWorldData& data);
};

/**
 * SMSG_ACCOUNT_DATA_TIMES data (from server)
 *
 * Contains timestamps for account data (macros, keybindings, etc.)
 */
struct AccountDataTimesData {
    uint32_t serverTime;                // Current server time (Unix timestamp)
    uint8_t unknown;                    // Unknown (always 1?)
    uint32_t accountDataTimes[8];       // Timestamps for 8 account data slots

    bool isValid() const { return true; }
};

/**
 * SMSG_ACCOUNT_DATA_TIMES parser
 */
class AccountDataTimesParser {
public:
    static bool parse(network::Packet& packet, AccountDataTimesData& data);
};

/**
 * SMSG_MOTD data (from server)
 *
 * Message of the Day from server
 */
struct MotdData {
    std::vector<std::string> lines;     // MOTD text lines

    bool isEmpty() const { return lines.empty(); }
    size_t lineCount() const { return lines.size(); }
};

/**
 * SMSG_MOTD parser
 */
class MotdParser {
public:
    static bool parse(network::Packet& packet, MotdData& data);
};

/**
 * CMSG_PING packet builder
 *
 * Heartbeat packet sent periodically to keep connection alive
 */
class PingPacket {
public:
    /**
     * Build CMSG_PING packet
     *
     * @param sequence Sequence number (increments with each ping)
     * @param latency Client-side latency estimate in milliseconds
     * @return Packet ready to send
     */
    static network::Packet build(uint32_t sequence, uint32_t latency);
};

/**
 * SMSG_PONG data (from server)
 *
 * Response to CMSG_PING, echoes back the sequence number
 */
struct PongData {
    uint32_t sequence;      // Sequence number from CMSG_PING

    bool isValid() const { return true; }
};

/**
 * SMSG_PONG parser
 */
class PongParser {
public:
    static bool parse(network::Packet& packet, PongData& data);
};

/**
 * Movement flags for player movement
 */
enum class MovementFlags : uint32_t {
    NONE                = 0x00000000,
    FORWARD             = 0x00000001,
    BACKWARD            = 0x00000002,
    STRAFE_LEFT         = 0x00000004,
    STRAFE_RIGHT        = 0x00000008,
    TURN_LEFT           = 0x00000010,
    TURN_RIGHT          = 0x00000020,
    PITCH_UP            = 0x00000040,
    PITCH_DOWN          = 0x00000080,
    WALKING             = 0x00000100,
    ONTRANSPORT         = 0x00000200,
    LEVITATING          = 0x00000400,
    ROOT                = 0x00000800,
    FALLING             = 0x00001000,
    FALLINGFAR          = 0x00002000,
    SWIMMING            = 0x00200000,
    ASCENDING           = 0x00400000,
    CAN_FLY             = 0x00800000,
    FLYING              = 0x01000000,
};

/**
 * Movement info structure
 *
 * Contains all movement-related data sent in movement packets
 */
struct MovementInfo {
    uint32_t flags = 0;             // Movement flags
    uint16_t flags2 = 0;            // Extra movement flags
    uint32_t time = 0;              // Movement timestamp (milliseconds)
    float x = 0.0f;                 // Position X
    float y = 0.0f;                 // Position Y
    float z = 0.0f;                 // Position Z
    float orientation = 0.0f;       // Facing direction (radians)

    // Optional fields (based on flags)
    float pitch = 0.0f;             // Pitch angle (swimming/flying)
    uint32_t fallTime = 0;          // Time falling (milliseconds)
    float jumpVelocity = 0.0f;      // Jump vertical velocity
    float jumpSinAngle = 0.0f;      // Jump horizontal sin
    float jumpCosAngle = 0.0f;      // Jump horizontal cos
    float jumpXYSpeed = 0.0f;       // Jump horizontal speed

    bool hasFlag(MovementFlags flag) const {
        return (flags & static_cast<uint32_t>(flag)) != 0;
    }
};

/**
 * Movement packet builder
 *
 * Builds CMSG_MOVE_* packets with movement info
 */
class MovementPacket {
public:
    /**
     * Build a movement packet
     *
     * @param opcode Movement opcode (CMSG_MOVE_START_FORWARD, etc.)
     * @param info Movement info
     * @return Packet ready to send
     */
    static network::Packet build(Opcode opcode, const MovementInfo& info, uint64_t playerGuid = 0);
};

// Forward declare Entity types
class Entity;
class EntityManager;
enum class ObjectType : uint8_t;
enum class UpdateType : uint8_t;

/**
 * Update block for a single object in SMSG_UPDATE_OBJECT
 */
struct UpdateBlock {
    UpdateType updateType;
    uint64_t guid = 0;
    ObjectType objectType;

    // Movement data (for MOVEMENT updates)
    bool hasMovement = false;
    float x = 0.0f, y = 0.0f, z = 0.0f, orientation = 0.0f;

    // Field data (for VALUES and CREATE updates)
    std::map<uint16_t, uint32_t> fields;
};

/**
 * SMSG_UPDATE_OBJECT data
 *
 * Contains all update blocks in the packet
 */
struct UpdateObjectData {
    uint32_t blockCount = 0;
    std::vector<UpdateBlock> blocks;

    // Out-of-range GUIDs (for OUT_OF_RANGE_OBJECTS)
    std::vector<uint64_t> outOfRangeGuids;
};

/**
 * SMSG_UPDATE_OBJECT parser
 *
 * Parses object updates from server
 */
class UpdateObjectParser {
public:
    /**
     * Parse SMSG_UPDATE_OBJECT packet
     *
     * @param packet Packet to parse
     * @param data Output data
     * @return true if successful
     */
    static bool parse(network::Packet& packet, UpdateObjectData& data);

    /**
     * Read packed GUID from packet
     *
     * @param packet Packet to read from
     * @return GUID value
     */
    static uint64_t readPackedGuid(network::Packet& packet);

private:
    /**
     * Parse a single update block
     *
     * @param packet Packet to read from
     * @param block Output block
     * @return true if successful
     */
    static bool parseUpdateBlock(network::Packet& packet, UpdateBlock& block);

    /**
     * Parse movement block
     *
     * @param packet Packet to read from
     * @param block Output block
     * @return true if successful
     */
    static bool parseMovementBlock(network::Packet& packet, UpdateBlock& block);

    /**
     * Parse update fields (mask + values)
     *
     * @param packet Packet to read from
     * @param block Output block
     * @return true if successful
     */
    static bool parseUpdateFields(network::Packet& packet, UpdateBlock& block);
};

/**
 * SMSG_DESTROY_OBJECT data
 */
struct DestroyObjectData {
    uint64_t guid = 0;
    bool isDeath = false;  // true if unit died, false if despawned
};

/**
 * SMSG_DESTROY_OBJECT parser
 */
class DestroyObjectParser {
public:
    static bool parse(network::Packet& packet, DestroyObjectData& data);
};

/**
 * Chat message types
 */
enum class ChatType : uint8_t {
    SAY = 0,
    PARTY = 1,
    RAID = 2,
    GUILD = 3,
    OFFICER = 4,
    YELL = 5,
    WHISPER = 6,
    WHISPER_INFORM = 7,
    EMOTE = 8,
    TEXT_EMOTE = 9,
    SYSTEM = 10,
    MONSTER_SAY = 11,
    MONSTER_YELL = 12,
    MONSTER_EMOTE = 13,
    CHANNEL = 14,
    CHANNEL_JOIN = 15,
    CHANNEL_LEAVE = 16,
    CHANNEL_LIST = 17,
    CHANNEL_NOTICE = 18,
    CHANNEL_NOTICE_USER = 19,
    AFK = 20,
    DND = 21,
    IGNORED = 22,
    SKILL = 23,
    LOOT = 24,
    BATTLEGROUND = 25,
    BATTLEGROUND_LEADER = 26,
    RAID_LEADER = 27,
    RAID_WARNING = 28,
    ACHIEVEMENT = 29,
    GUILD_ACHIEVEMENT = 30
};

/**
 * Chat language IDs
 */
enum class ChatLanguage : uint32_t {
    UNIVERSAL = 0,
    ORCISH = 1,
    DARNASSIAN = 2,
    TAURAHE = 3,
    DWARVISH = 6,
    COMMON = 7,
    DEMONIC = 8,
    TITAN = 9,
    THALASSIAN = 10,
    DRACONIC = 11,
    KALIMAG = 12,
    GNOMISH = 13,
    TROLL = 14,
    GUTTERSPEAK = 33,
    DRAENEI = 35,
    ZOMBIE = 36,
    GNOMISH_BINARY = 37,
    GOBLIN_BINARY = 38,
    ADDON = 0xFFFFFFFF  // Used for addon communication
};

/**
 * CMSG_MESSAGECHAT packet builder
 */
class MessageChatPacket {
public:
    /**
     * Build CMSG_MESSAGECHAT packet
     *
     * @param type Chat type (SAY, YELL, etc.)
     * @param language Language ID
     * @param message Message text
     * @param target Target name (for whispers, empty otherwise)
     * @return Packet ready to send
     */
    static network::Packet build(ChatType type,
                                  ChatLanguage language,
                                  const std::string& message,
                                  const std::string& target = "");
};

/**
 * SMSG_MESSAGECHAT data
 */
struct MessageChatData {
    ChatType type;
    ChatLanguage language;
    uint64_t senderGuid = 0;
    std::string senderName;
    uint64_t receiverGuid = 0;
    std::string receiverName;
    std::string message;
    std::string channelName;  // For channel messages
    uint8_t chatTag = 0;      // Player flags (AFK, DND, GM, etc.)

    bool isValid() const { return !message.empty(); }
};

/**
 * SMSG_MESSAGECHAT parser
 */
class MessageChatParser {
public:
    static bool parse(network::Packet& packet, MessageChatData& data);
};

/**
 * Get human-readable string for chat type
 */
const char* getChatTypeString(ChatType type);

// ============================================================
// Server Info Commands
// ============================================================

/** CMSG_QUERY_TIME packet builder */
class QueryTimePacket {
public:
    static network::Packet build();
};

/** SMSG_QUERY_TIME_RESPONSE data */
struct QueryTimeResponseData {
    uint32_t serverTime = 0;  // Unix timestamp
    uint32_t timeOffset = 0;  // Time until next daily reset
};

/** SMSG_QUERY_TIME_RESPONSE parser */
class QueryTimeResponseParser {
public:
    static bool parse(network::Packet& packet, QueryTimeResponseData& data);
};

/** CMSG_REQUEST_PLAYED_TIME packet builder */
class RequestPlayedTimePacket {
public:
    static network::Packet build(bool sendToChat = true);
};

/** SMSG_PLAYED_TIME data */
struct PlayedTimeData {
    uint32_t totalTimePlayed = 0;  // Total seconds played
    uint32_t levelTimePlayed = 0;  // Seconds played at current level
    bool triggerMessage = false;   // Whether to show in chat
};

/** SMSG_PLAYED_TIME parser */
class PlayedTimeParser {
public:
    static bool parse(network::Packet& packet, PlayedTimeData& data);
};

/** CMSG_WHO packet builder */
class WhoPacket {
public:
    static network::Packet build(uint32_t minLevel = 0, uint32_t maxLevel = 0,
                                 const std::string& playerName = "",
                                 const std::string& guildName = "",
                                 uint32_t raceMask = 0xFFFFFFFF,
                                 uint32_t classMask = 0xFFFFFFFF,
                                 uint32_t zones = 0);
};

// ============================================================
// Social Commands
// ============================================================

/** CMSG_ADD_FRIEND packet builder */
class AddFriendPacket {
public:
    static network::Packet build(const std::string& playerName, const std::string& note = "");
};

/** CMSG_DEL_FRIEND packet builder */
class DelFriendPacket {
public:
    static network::Packet build(uint64_t friendGuid);
};

/** CMSG_SET_CONTACT_NOTES packet builder */
class SetContactNotesPacket {
public:
    static network::Packet build(uint64_t friendGuid, const std::string& note);
};

/** SMSG_FRIEND_STATUS data */
struct FriendStatusData {
    uint8_t status = 0;  // 0 = offline, 1 = online, etc.
    uint64_t guid = 0;
    std::string note;
    uint8_t chatFlag = 0;
};

/** SMSG_FRIEND_STATUS parser */
class FriendStatusParser {
public:
    static bool parse(network::Packet& packet, FriendStatusData& data);
};

/** CMSG_ADD_IGNORE packet builder */
class AddIgnorePacket {
public:
    static network::Packet build(const std::string& playerName);
};

/** CMSG_DEL_IGNORE packet builder */
class DelIgnorePacket {
public:
    static network::Packet build(uint64_t ignoreGuid);
};

// ============================================================
// Logout Commands
// ============================================================

/** CMSG_LOGOUT_REQUEST packet builder */
class LogoutRequestPacket {
public:
    static network::Packet build();
};

/** CMSG_LOGOUT_CANCEL packet builder */
class LogoutCancelPacket {
public:
    static network::Packet build();
};

/** SMSG_LOGOUT_RESPONSE data */
struct LogoutResponseData {
    uint32_t result = 0;  // 0 = success, 1 = failure
    uint8_t instant = 0;  // 1 = instant logout
};

/** SMSG_LOGOUT_RESPONSE parser */
class LogoutResponseParser {
public:
    static bool parse(network::Packet& packet, LogoutResponseData& data);
};

// ============================================================
// Stand State
// ============================================================

/** CMSG_STAND_STATE_CHANGE packet builder */
class StandStateChangePacket {
public:
    static network::Packet build(uint8_t state);
};

// ============================================================
// Display Toggles
// ============================================================

/** CMSG_SHOWING_HELM packet builder */
class ShowingHelmPacket {
public:
    static network::Packet build(bool show);
};

/** CMSG_SHOWING_CLOAK packet builder */
class ShowingCloakPacket {
public:
    static network::Packet build(bool show);
};

// ============================================================
// PvP
// ============================================================

/** CMSG_TOGGLE_PVP packet builder */
class TogglePvpPacket {
public:
    static network::Packet build();
};

// ============================================================
// Guild Commands
// ============================================================

/** CMSG_GUILD_INFO packet builder */
class GuildInfoPacket {
public:
    static network::Packet build();
};

/** CMSG_GUILD_GET_ROSTER packet builder */
class GuildRosterPacket {
public:
    static network::Packet build();
};

/** CMSG_GUILD_MOTD packet builder */
class GuildMotdPacket {
public:
    static network::Packet build(const std::string& motd);
};

/** CMSG_GUILD_PROMOTE_MEMBER packet builder */
class GuildPromotePacket {
public:
    static network::Packet build(const std::string& playerName);
};

/** CMSG_GUILD_DEMOTE_MEMBER packet builder */
class GuildDemotePacket {
public:
    static network::Packet build(const std::string& playerName);
};

/** CMSG_GUILD_LEAVE packet builder */
class GuildLeavePacket {
public:
    static network::Packet build();
};

/** CMSG_GUILD_INVITE packet builder */
class GuildInvitePacket {
public:
    static network::Packet build(const std::string& playerName);
};

// ============================================================
// Ready Check
// ============================================================

/** MSG_RAID_READY_CHECK packet builder */
class ReadyCheckPacket {
public:
    static network::Packet build();
};

/** MSG_RAID_READY_CHECK_CONFIRM packet builder */
class ReadyCheckConfirmPacket {
public:
    static network::Packet build(bool ready);
};

// ============================================================
// Duel
// ============================================================

/** CMSG_DUEL_CANCELLED packet builder */
class DuelCancelPacket {
public:
    static network::Packet build();
};

// ============================================================
// Random Roll
// ============================================================

/** CMSG_RANDOM_ROLL packet builder */
class RandomRollPacket {
public:
    static network::Packet build(uint32_t minRoll, uint32_t maxRoll);
};

/** SMSG_RANDOM_ROLL data */
struct RandomRollData {
    uint64_t rollerGuid = 0;
    uint64_t targetGuid = 0;  // 0 for party roll
    uint32_t minRoll = 0;
    uint32_t maxRoll = 0;
    uint32_t result = 0;
};

/** SMSG_RANDOM_ROLL parser */
class RandomRollParser {
public:
    static bool parse(network::Packet& packet, RandomRollData& data);
};

// ============================================================
// Phase 1: Foundation — Targeting, Name Queries
// ============================================================

/** CMSG_SET_SELECTION packet builder */
class SetSelectionPacket {
public:
    static network::Packet build(uint64_t targetGuid);
};

/** CMSG_SET_ACTIVE_MOVER packet builder */
class SetActiveMoverPacket {
public:
    static network::Packet build(uint64_t guid);
};

/** CMSG_INSPECT packet builder */
class InspectPacket {
public:
    static network::Packet build(uint64_t targetGuid);
};

/** CMSG_NAME_QUERY packet builder */
class NameQueryPacket {
public:
    static network::Packet build(uint64_t playerGuid);
};

/** SMSG_NAME_QUERY_RESPONSE data */
struct NameQueryResponseData {
    uint64_t guid = 0;
    uint8_t found = 1;        // 0 = found, 1 = not found
    std::string name;
    std::string realmName;
    uint8_t race = 0;
    uint8_t gender = 0;
    uint8_t classId = 0;

    bool isValid() const { return found == 0 && !name.empty(); }
};

/** SMSG_NAME_QUERY_RESPONSE parser */
class NameQueryResponseParser {
public:
    static bool parse(network::Packet& packet, NameQueryResponseData& data);
};

/** CMSG_CREATURE_QUERY packet builder */
class CreatureQueryPacket {
public:
    static network::Packet build(uint32_t entry, uint64_t guid);
};

/** SMSG_CREATURE_QUERY_RESPONSE data */
struct CreatureQueryResponseData {
    uint32_t entry = 0;
    std::string name;
    std::string subName;
    std::string iconName;
    uint32_t typeFlags = 0;
    uint32_t creatureType = 0;
    uint32_t family = 0;
    uint32_t rank = 0;         // 0=Normal, 1=Elite, 2=Rare Elite, 3=Boss, 4=Rare

    bool isValid() const { return entry != 0 && !name.empty(); }
};

/** SMSG_CREATURE_QUERY_RESPONSE parser */
class CreatureQueryResponseParser {
public:
    static bool parse(network::Packet& packet, CreatureQueryResponseData& data);
};

// ============================================================
// Item Query
// ============================================================

/** CMSG_ITEM_QUERY_SINGLE packet builder */
class ItemQueryPacket {
public:
    static network::Packet build(uint32_t entry, uint64_t guid);
};

/** SMSG_ITEM_QUERY_SINGLE_RESPONSE data */
struct ItemQueryResponseData {
    uint32_t entry = 0;
    std::string name;
    uint32_t displayInfoId = 0;
    uint32_t quality = 0;
    uint32_t inventoryType = 0;
    int32_t maxStack = 1;
    uint32_t containerSlots = 0;
    int32_t armor = 0;
    int32_t stamina = 0;
    int32_t strength = 0;
    int32_t agility = 0;
    int32_t intellect = 0;
    int32_t spirit = 0;
    uint32_t sellPrice = 0;
    std::string subclassName;
    bool valid = false;
};

/** SMSG_ITEM_QUERY_SINGLE_RESPONSE parser */
class ItemQueryResponseParser {
public:
    static bool parse(network::Packet& packet, ItemQueryResponseData& data);
};

// ============================================================
// Phase 2: Combat Core
// ============================================================

/** SMSG_MONSTER_MOVE data */
struct MonsterMoveData {
    uint64_t guid = 0;
    float x = 0, y = 0, z = 0;  // Current position (server coords)
    uint8_t moveType = 0;  // 0=Normal, 1=Stop, 2=FacingSpot, 3=FacingTarget, 4=FacingAngle
    float facingAngle = 0;
    uint64_t facingTarget = 0;
    uint32_t splineFlags = 0;
    uint32_t duration = 0;
    // Destination (final point of the spline, server coords)
    float destX = 0, destY = 0, destZ = 0;
    bool hasDest = false;
};

class MonsterMoveParser {
public:
    static bool parse(network::Packet& packet, MonsterMoveData& data);
};

/** CMSG_ATTACKSWING packet builder */
class AttackSwingPacket {
public:
    static network::Packet build(uint64_t targetGuid);
};

/** CMSG_ATTACKSTOP packet builder */
class AttackStopPacket {
public:
    static network::Packet build();
};

/** SMSG_ATTACKSTART data */
struct AttackStartData {
    uint64_t attackerGuid = 0;
    uint64_t victimGuid = 0;
    bool isValid() const { return attackerGuid != 0 && victimGuid != 0; }
};

class AttackStartParser {
public:
    static bool parse(network::Packet& packet, AttackStartData& data);
};

/** SMSG_ATTACKSTOP data */
struct AttackStopData {
    uint64_t attackerGuid = 0;
    uint64_t victimGuid = 0;
    uint32_t unknown = 0;
    bool isValid() const { return true; }
};

class AttackStopParser {
public:
    static bool parse(network::Packet& packet, AttackStopData& data);
};

/** Sub-damage entry for melee hits */
struct SubDamage {
    uint32_t schoolMask = 0;
    float damage = 0.0f;
    uint32_t intDamage = 0;
    uint32_t absorbed = 0;
    uint32_t resisted = 0;
};

/** SMSG_ATTACKERSTATEUPDATE data */
struct AttackerStateUpdateData {
    uint32_t hitInfo = 0;
    uint64_t attackerGuid = 0;
    uint64_t targetGuid = 0;
    int32_t totalDamage = 0;
    uint8_t subDamageCount = 0;
    std::vector<SubDamage> subDamages;
    uint32_t victimState = 0;    // 0=hit, 1=dodge, 2=parry, 3=interrupt, 4=block, etc.
    int32_t overkill = -1;
    uint32_t blocked = 0;

    bool isValid() const { return attackerGuid != 0; }
    bool isCrit() const { return (hitInfo & 0x200) != 0; }
    bool isMiss() const { return (hitInfo & 0x10) != 0; }
};

class AttackerStateUpdateParser {
public:
    static bool parse(network::Packet& packet, AttackerStateUpdateData& data);
};

/** SMSG_SPELLNONMELEEDAMAGELOG data (simplified) */
struct SpellDamageLogData {
    uint64_t targetGuid = 0;
    uint64_t attackerGuid = 0;
    uint32_t spellId = 0;
    uint32_t damage = 0;
    uint32_t overkill = 0;
    uint8_t schoolMask = 0;
    uint32_t absorbed = 0;
    uint32_t resisted = 0;
    bool isCrit = false;

    bool isValid() const { return spellId != 0; }
};

class SpellDamageLogParser {
public:
    static bool parse(network::Packet& packet, SpellDamageLogData& data);
};

/** SMSG_SPELLHEALLOG data (simplified) */
struct SpellHealLogData {
    uint64_t targetGuid = 0;
    uint64_t casterGuid = 0;
    uint32_t spellId = 0;
    uint32_t heal = 0;
    uint32_t overheal = 0;
    uint32_t absorbed = 0;
    bool isCrit = false;

    bool isValid() const { return spellId != 0; }
};

class SpellHealLogParser {
public:
    static bool parse(network::Packet& packet, SpellHealLogData& data);
};

// ============================================================
// XP Gain
// ============================================================

/** SMSG_LOG_XPGAIN data */
struct XpGainData {
    uint64_t victimGuid = 0;    // 0 for non-kill XP (quest, exploration)
    uint32_t totalXp = 0;
    uint8_t type = 0;           // 0 = kill, 1 = non-kill
    uint32_t groupBonus = 0;

    bool isValid() const { return totalXp > 0; }
};

class XpGainParser {
public:
    static bool parse(network::Packet& packet, XpGainData& data);
};

// ============================================================
// Phase 3: Spells, Action Bar, Auras
// ============================================================

/** SMSG_INITIAL_SPELLS data */
struct InitialSpellsData {
    uint8_t talentSpec = 0;
    std::vector<uint32_t> spellIds;
    std::vector<SpellCooldownEntry> cooldowns;

    bool isValid() const { return true; }
};

class InitialSpellsParser {
public:
    static bool parse(network::Packet& packet, InitialSpellsData& data);
};

/** CMSG_CAST_SPELL packet builder */
class CastSpellPacket {
public:
    static network::Packet build(uint32_t spellId, uint64_t targetGuid, uint8_t castCount);
};

/** CMSG_CANCEL_CAST packet builder */
class CancelCastPacket {
public:
    static network::Packet build(uint32_t spellId);
};

/** CMSG_CANCEL_AURA packet builder */
class CancelAuraPacket {
public:
    static network::Packet build(uint32_t spellId);
};

/** SMSG_CAST_FAILED data */
struct CastFailedData {
    uint8_t castCount = 0;
    uint32_t spellId = 0;
    uint8_t result = 0;

    bool isValid() const { return spellId != 0; }
};

class CastFailedParser {
public:
    static bool parse(network::Packet& packet, CastFailedData& data);
};

/** SMSG_SPELL_START data (simplified) */
struct SpellStartData {
    uint64_t casterGuid = 0;
    uint64_t casterUnit = 0;
    uint8_t castCount = 0;
    uint32_t spellId = 0;
    uint32_t castFlags = 0;
    uint32_t castTime = 0;
    uint64_t targetGuid = 0;

    bool isValid() const { return spellId != 0; }
};

class SpellStartParser {
public:
    static bool parse(network::Packet& packet, SpellStartData& data);
};

/** SMSG_SPELL_GO data (simplified) */
struct SpellGoData {
    uint64_t casterGuid = 0;
    uint64_t casterUnit = 0;
    uint8_t castCount = 0;
    uint32_t spellId = 0;
    uint32_t castFlags = 0;
    uint8_t hitCount = 0;
    std::vector<uint64_t> hitTargets;
    uint8_t missCount = 0;

    bool isValid() const { return spellId != 0; }
};

class SpellGoParser {
public:
    static bool parse(network::Packet& packet, SpellGoData& data);
};

/** SMSG_AURA_UPDATE / SMSG_AURA_UPDATE_ALL data */
struct AuraUpdateData {
    uint64_t guid = 0;
    std::vector<std::pair<uint8_t, AuraSlot>> updates; // slot index + aura data

    bool isValid() const { return true; }
};

class AuraUpdateParser {
public:
    static bool parse(network::Packet& packet, AuraUpdateData& data, bool isAll);
};

/** SMSG_SPELL_COOLDOWN data */
struct SpellCooldownData {
    uint64_t guid = 0;
    uint8_t flags = 0;
    std::vector<std::pair<uint32_t, uint32_t>> cooldowns; // spellId, cooldownMs

    bool isValid() const { return true; }
};

class SpellCooldownParser {
public:
    static bool parse(network::Packet& packet, SpellCooldownData& data);
};

// ============================================================
// Phase 4: Group/Party System
// ============================================================

/** CMSG_GROUP_INVITE packet builder */
class GroupInvitePacket {
public:
    static network::Packet build(const std::string& playerName);
};

/** SMSG_GROUP_INVITE data */
struct GroupInviteResponseData {
    uint8_t canAccept = 0;
    std::string inviterName;

    bool isValid() const { return !inviterName.empty(); }
};

class GroupInviteResponseParser {
public:
    static bool parse(network::Packet& packet, GroupInviteResponseData& data);
};

/** CMSG_GROUP_ACCEPT packet builder */
class GroupAcceptPacket {
public:
    static network::Packet build();
};

/** CMSG_GROUP_DECLINE packet builder */
class GroupDeclinePacket {
public:
    static network::Packet build();
};

/** CMSG_GROUP_DISBAND (leave party) packet builder */
class GroupDisbandPacket {
public:
    static network::Packet build();
};

/** SMSG_GROUP_LIST parser */
class GroupListParser {
public:
    static bool parse(network::Packet& packet, GroupListData& data);
};

/** SMSG_PARTY_COMMAND_RESULT data */
struct PartyCommandResultData {
    PartyCommand command;
    std::string name;
    PartyResult result;

    bool isValid() const { return true; }
};

class PartyCommandResultParser {
public:
    static bool parse(network::Packet& packet, PartyCommandResultData& data);
};

/** SMSG_GROUP_DECLINE data */
struct GroupDeclineData {
    std::string playerName;
    bool isValid() const { return !playerName.empty(); }
};

class GroupDeclineResponseParser {
public:
    static bool parse(network::Packet& packet, GroupDeclineData& data);
};

// ============================================================
// Phase 5: Loot System
// ============================================================

/** Loot item entry */
struct LootItem {
    uint8_t slotIndex = 0;
    uint32_t itemId = 0;
    uint32_t count = 0;
    uint32_t displayInfoId = 0;
    uint32_t randomSuffix = 0;
    uint32_t randomPropertyId = 0;
    uint8_t lootSlotType = 0;
};

/** SMSG_LOOT_RESPONSE data */
struct LootResponseData {
    uint64_t lootGuid = 0;
    uint8_t lootType = 0;
    uint32_t gold = 0;           // In copper
    std::vector<LootItem> items;

    bool isValid() const { return true; }
    uint32_t getGold() const { return gold / 10000; }
    uint32_t getSilver() const { return (gold / 100) % 100; }
    uint32_t getCopper() const { return gold % 100; }
};

/** CMSG_LOOT packet builder */
class LootPacket {
public:
    static network::Packet build(uint64_t targetGuid);
};

/** CMSG_AUTOSTORE_LOOT_ITEM packet builder */
class AutostoreLootItemPacket {
public:
    static network::Packet build(uint8_t slotIndex);
};

/** CMSG_USE_ITEM packet builder */
class UseItemPacket {
public:
    static network::Packet build(uint8_t bagIndex, uint8_t slotIndex, uint64_t itemGuid);
};

/** CMSG_AUTOEQUIP_ITEM packet builder */
class AutoEquipItemPacket {
public:
    static network::Packet build(uint8_t srcBag, uint8_t srcSlot);
};

/** CMSG_LOOT_MONEY packet builder (empty body) */
class LootMoneyPacket {
public:
    static network::Packet build();
};

/** CMSG_LOOT_RELEASE packet builder */
class LootReleasePacket {
public:
    static network::Packet build(uint64_t lootGuid);
};

/** SMSG_LOOT_RESPONSE parser */
class LootResponseParser {
public:
    static bool parse(network::Packet& packet, LootResponseData& data);
};

// ============================================================
// Phase 5: NPC Gossip
// ============================================================

/** Gossip menu option */
struct GossipOption {
    uint32_t id = 0;
    uint8_t icon = 0;          // 0=chat, 1=vendor, 2=taxi, 3=trainer, etc.
    bool isCoded = false;
    uint32_t boxMoney = 0;
    std::string text;
    std::string boxText;
};

/** Gossip quest item */
struct GossipQuestItem {
    uint32_t questId = 0;
    uint32_t questIcon = 0;
    int32_t questLevel = 0;
    uint32_t questFlags = 0;
    uint8_t isRepeatable = 0;
    std::string title;
};

/** SMSG_GOSSIP_MESSAGE data */
struct GossipMessageData {
    uint64_t npcGuid = 0;
    uint32_t menuId = 0;
    uint32_t titleTextId = 0;
    std::vector<GossipOption> options;
    std::vector<GossipQuestItem> quests;

    bool isValid() const { return true; }
};

/** CMSG_GOSSIP_HELLO packet builder */
class GossipHelloPacket {
public:
    static network::Packet build(uint64_t npcGuid);
};

/** CMSG_GOSSIP_SELECT_OPTION packet builder */
class GossipSelectOptionPacket {
public:
    static network::Packet build(uint64_t npcGuid, uint32_t menuId, uint32_t optionId, const std::string& code = "");
};

/** SMSG_GOSSIP_MESSAGE parser */
class GossipMessageParser {
public:
    static bool parse(network::Packet& packet, GossipMessageData& data);
};

/** CMSG_QUESTGIVER_QUERY_QUEST packet builder */
class QuestgiverQueryQuestPacket {
public:
    static network::Packet build(uint64_t npcGuid, uint32_t questId);
};

/** CMSG_QUESTGIVER_ACCEPT_QUEST packet builder */
class QuestgiverAcceptQuestPacket {
public:
    static network::Packet build(uint64_t npcGuid, uint32_t questId);
};

/** SMSG_QUESTGIVER_QUEST_DETAILS data (simplified) */
struct QuestDetailsData {
    uint64_t npcGuid = 0;
    uint32_t questId = 0;
    std::string title;
    std::string details;      // Quest description text
    std::string objectives;   // Objectives text
    uint32_t suggestedPlayers = 0;
    uint32_t rewardMoney = 0;
    uint32_t rewardXp = 0;
};

/** SMSG_QUESTGIVER_QUEST_DETAILS parser */
class QuestDetailsParser {
public:
    static bool parse(network::Packet& packet, QuestDetailsData& data);
};

/** Reward item entry (shared by quest detail/offer windows) */
struct QuestRewardItem {
    uint32_t itemId = 0;
    uint32_t count = 0;
    uint32_t displayInfoId = 0;
};

/** SMSG_QUESTGIVER_REQUEST_ITEMS data (turn-in progress check) */
struct QuestRequestItemsData {
    uint64_t npcGuid = 0;
    uint32_t questId = 0;
    std::string title;
    std::string completionText;
    uint32_t requiredMoney = 0;
    uint32_t completableFlags = 0;  // 0x03 = completable
    std::vector<QuestRewardItem> requiredItems;

    bool isCompletable() const { return (completableFlags & 0x03) != 0; }
};

/** SMSG_QUESTGIVER_REQUEST_ITEMS parser */
class QuestRequestItemsParser {
public:
    static bool parse(network::Packet& packet, QuestRequestItemsData& data);
};

/** SMSG_QUESTGIVER_OFFER_REWARD data (choose reward) */
struct QuestOfferRewardData {
    uint64_t npcGuid = 0;
    uint32_t questId = 0;
    std::string title;
    std::string rewardText;
    uint32_t rewardMoney = 0;
    uint32_t rewardXp = 0;
    std::vector<QuestRewardItem> choiceRewards;  // Pick one
    std::vector<QuestRewardItem> fixedRewards;   // Always given
};

/** SMSG_QUESTGIVER_OFFER_REWARD parser */
class QuestOfferRewardParser {
public:
    static bool parse(network::Packet& packet, QuestOfferRewardData& data);
};

/** CMSG_QUESTGIVER_COMPLETE_QUEST packet builder */
class QuestgiverCompleteQuestPacket {
public:
    static network::Packet build(uint64_t npcGuid, uint32_t questId);
};

/** CMSG_QUESTGIVER_CHOOSE_REWARD packet builder */
class QuestgiverChooseRewardPacket {
public:
    static network::Packet build(uint64_t npcGuid, uint32_t questId, uint32_t rewardIndex);
};

// ============================================================
// Phase 5: Vendor
// ============================================================

/** Vendor item entry */
struct VendorItem {
    uint32_t slot = 0;
    uint32_t itemId = 0;
    uint32_t displayInfoId = 0;
    int32_t maxCount = -1;       // -1 = unlimited
    uint32_t buyPrice = 0;       // In copper
    uint32_t durability = 0;
    uint32_t stackCount = 0;
    uint32_t extendedCost = 0;
};

/** SMSG_LIST_INVENTORY data */
struct ListInventoryData {
    uint64_t vendorGuid = 0;
    std::vector<VendorItem> items;

    bool isValid() const { return true; }
};

/** CMSG_LIST_INVENTORY packet builder */
class ListInventoryPacket {
public:
    static network::Packet build(uint64_t npcGuid);
};

/** CMSG_BUY_ITEM packet builder */
class BuyItemPacket {
public:
    static network::Packet build(uint64_t vendorGuid, uint32_t itemId, uint32_t slot, uint8_t count);
};

/** CMSG_SELL_ITEM packet builder */
class SellItemPacket {
public:
    static network::Packet build(uint64_t vendorGuid, uint64_t itemGuid, uint32_t count);
};

/** SMSG_LIST_INVENTORY parser */
class ListInventoryParser {
public:
    static bool parse(network::Packet& packet, ListInventoryData& data);
};

/** CMSG_REPOP_REQUEST packet builder */
class RepopRequestPacket {
public:
    static network::Packet build();
};

/** CMSG_SPIRIT_HEALER_ACTIVATE packet builder */
class SpiritHealerActivatePacket {
public:
    static network::Packet build(uint64_t npcGuid);
};

} // namespace game
} // namespace wowee