defmodule Odinsea.Net.Opcodes do
  @moduledoc """
  Packet opcodes for MapleStory GMS v342.

  Directly ported from Java recvops.properties and sendops.properties.
  All opcode values MUST match exactly for compatibility with the v342 client.

  Naming conventions:
  - Client → Server (recv): cp_* (Client Packet)
  - Server → Client (send): lp_* (LoopBack Packet)
  """

  # ==================================================================================================
  # Client → Server (Recv Opcodes) - From recvops.properties
  # ==================================================================================================

  # Connection/Security
  def cp_alive_ack(), do: 0x16

  # Login/Account
  def cp_client_hello(), do: 0x01
  def cp_login_password(), do: 0x02
  def cp_serverlist_request(), do: 0x04
  def cp_charlist_request(), do: 0x05
  def cp_serverstatus_request(), do: 0x06
  def cp_check_char_name(), do: 0x0E
  def cp_create_char(), do: 0x12
  def cp_create_ultimate(), do: 0x14
  def cp_delete_char(), do: 0x15
  def cp_exception_log(), do: 0x17
  def cp_security_packet(), do: 0x18
  def cp_hardware_info(), do: 0x70
  def cp_window_focus(), do: 0x71
  def cp_char_select(), do: 0x19
  def cp_auth_second_password(), do: 0x1A
  def cp_rsa_key(), do: 0x20
  def cp_client_dump_log(), do: 0x1D
  def cp_create_security_handle(), do: 0x1E
  def cp_select_world(), do: 0x03
  def cp_check_user_limit(), do: 0x06

  # Migration/Channel
  def cp_player_loggedin(), do: 0x0D
  def cp_change_map(), do: 0x23
  def cp_change_channel(), do: 0x24
  def cp_enter_cash_shop(), do: 0x25
  def cp_enter_pvp(), do: 0x26
  def cp_enter_pvp_party(), do: 0x27
  def cp_leave_pvp(), do: 0x29
  def cp_migrate_in(), do: 0x0D
  def cp_enter_mts(), do: 0xB4

  # Player Movement/Actions
  def cp_move_player(), do: 0x2A
  def cp_cancel_chair(), do: 0x2C
  def cp_use_chair(), do: 0x2D
  def cp_close_range_attack(), do: 0x2F
  def cp_ranged_attack(), do: 0x30
  def cp_magic_attack(), do: 0x31
  def cp_passive_energy(), do: 0x32
  def cp_take_damage(), do: 0x34
  def cp_pvp_attack(), do: 0x35
  def cp_general_chat(), do: 0x36
  def cp_close_chalkboard(), do: 0x37
  def cp_face_expression(), do: 0x38
  def cp_face_android(), do: 0x39
  def cp_use_itemeffect(), do: 0x3A
  def cp_wheel_of_fortune(), do: 0x3B
  def cp_char_info_request(), do: 0x75
  def cp_spawn_pet(), do: 0x76
  def cp_cancel_debuff(), do: 0x78
  def cp_change_map_special(), do: 0x79
  def cp_use_inner_portal(), do: 0x7B
  def cp_trock_add_map(), do: 0x7C

  # NPC Interaction
  def cp_npc_talk(), do: 0x40
  def cp_npc_move(), do: 0x41  # NPC animation/movement (added for compatibility)
  def cp_npc_talk_more(), do: 0x42
  def cp_npc_shop(), do: 0x43
  def cp_storage(), do: 0x44
  def cp_use_hired_merchant(), do: 0x45
  def cp_merch_item_store(), do: 0x47
  def cp_duey_action(), do: 0x48
  def cp_mech_cancel(), do: 0x49
  def cp_owl(), do: 0x4A
  def cp_owl_warp(), do: 0x4B

  # Inventory/Items
  def cp_item_sort(), do: 0x4D
  def cp_item_gather(), do: 0x4E
  def cp_item_move(), do: 0x4F
  def cp_move_bag(), do: 0x50
  def cp_switch_bag(), do: 0x51
  def cp_use_item(), do: 0x53
  def cp_cancel_item_effect(), do: 0x54
  def cp_use_summon_bag(), do: 0x56
  def cp_pet_food(), do: 0x57
  def cp_use_mount_food(), do: 0x58
  def cp_use_scripted_npc_item(), do: 0x59
  def cp_use_recipe(), do: 0x5A
  def cp_use_cash_item(), do: 0x5B
  def cp_use_catch_item(), do: 0x5D
  def cp_use_skill_book(), do: 0x5E
  def cp_use_owl_minerva(), do: 0x60
  def cp_use_tele_rock(), do: 0x61
  def cp_use_return_scroll(), do: 0x62
  def cp_use_upgrade_scroll(), do: 0x63
  def cp_use_flag_scroll(), do: 0x64
  def cp_use_equip_scroll(), do: 0x65
  def cp_use_potential_scroll(), do: 0x66
  def cp_use_bag(), do: 0x68
  def cp_use_magnify_glass(), do: 0x69
  def cp_item_pickup(), do: 0x10C

  # Stats/Skills
  def cp_distribute_ap(), do: 0x6A
  def cp_auto_assign_ap(), do: 0x6B
  def cp_heal_over_time(), do: 0x6C
  def cp_distribute_sp(), do: 0x6E
  def cp_special_move(), do: 0x6F
  def cp_cancel_buff(), do: 0x70
  def cp_skill_effect(), do: 0x71
  def cp_meso_drop(), do: 0x72
  def cp_give_fame(), do: 0x73
  def cp_skill_macro(), do: 0x84
  def cp_change_keymap(), do: 0xB2

  # Anti-Cheat
  def cp_user_anti_macro_item_use_request(), do: 0x7D
  def cp_user_anti_macro_skill_use_request(), do: 0x7E
  def cp_user_anti_macro_question_result(), do: 0x7F

  # Quests
  def cp_quest_action(), do: 0x81
  def cp_reward_item(), do: 0x86
  def cp_update_quest(), do: 0x142
  def cp_quest_item(), do: 0x143
  def cp_use_item_quest(), do: 0x144

  # Crafting
  def cp_item_maker(), do: 0x87
  def cp_repair_all(), do: 0x88
  def cp_repair(), do: 0x89
  def cp_solomon(), do: 0x8C
  def cp_gach_exp(), do: 0x8D
  def cp_craft_done(), do: 0xC8
  def cp_craft_effect(), do: 0xC9
  def cp_craft_make(), do: 0xCA

  # Profession/Harvesting
  def cp_profession_info(), do: 0x97
  def cp_use_pot(), do: 0x98
  def cp_clear_pot(), do: 0x99
  def cp_feed_pot(), do: 0x9A
  def cp_cure_pot(), do: 0x9B
  def cp_reward_pot(), do: 0x9C
  def cp_use_treasuer_chest(), do: 0x95
  def cp_start_harvest(), do: 0x12E
  def cp_stop_harvest(), do: 0x12F
  def cp_make_extractor(), do: 0x114

  # Social
  def cp_partychat(), do: 0xA0
  def cp_party_chat(), do: cp_partychat()  # Alias for readability
  def cp_whisper(), do: 0xA1
  def cp_messenger(), do: 0xA2
  def cp_player_interaction(), do: 0xA3
  def cp_party_operation(), do: 0xA4
  def cp_deny_party_request(), do: 0xA5
  def cp_expedition_operation(), do: 0xA6
  def cp_expedition_listing(), do: 0xA7
  def cp_guild_operation(), do: 0xA8
  def cp_deny_guild_request(), do: 0xA9
  def cp_admin_command(), do: 0xAA
  def cp_admin_log(), do: 0xAB
  def cp_buddylist_modify(), do: 0xAC
  def cp_note_action(), do: 0xAD
  def cp_alliance_operation(), do: 0xBA
  def cp_deny_alliance_request(), do: 0xBB

  # Family
  def cp_request_family(), do: 0xBC
  def cp_open_family(), do: 0xBD
  def cp_family_operation(), do: 0xBE
  def cp_delete_junior(), do: 0xBF
  def cp_delete_senior(), do: 0xC0
  def cp_accept_family(), do: 0xC1
  def cp_use_family(), do: 0xC2
  def cp_family_precept(), do: 0xC3
  def cp_family_summon(), do: 0xC4
  def cp_cygnus_summon(), do: 0xC5
  def cp_aran_combo(), do: 0xC6

  # Misc
  def cp_follow_request(), do: 0x8E
  def cp_follow_reply(), do: 0x91
  def cp_auto_follow_reply(), do: 0x92
  def cp_report(), do: 0x94
  def cp_pvp_respawn(), do: 0x9D
  def cp_use_door(), do: 0xAF
  def cp_use_mech_door(), do: 0xB0
  def cp_rps_game(), do: 0xB3
  def cp_ring_action(), do: 0xB5
  def cp_bbs_operation(), do: 0xCD
  def cp_transform_player(), do: 0xD2
  def cp_xmas_surprise(), do: 0xD3
  def cp_game_poll(), do: 0xD4

  # Pets
  def cp_move_pet(), do: 0xD7
  def cp_pet_chat(), do: 0xD8
  def cp_pet_command(), do: 0xD9
  def cp_pet_loot(), do: 0xDA
  def cp_pet_auto_pot(), do: 0xDB

  # Summons
  def cp_move_summon(), do: 0xDF
  def cp_summon_attack(), do: 0xE0
  def cp_damage_summon(), do: 0xE1
  def cp_sub_summon(), do: 0xE2
  def cp_remove_summon(), do: 0xE3
  def cp_pvp_summon(), do: 0xE4

  # Dragon/Android
  def cp_move_dragon(), do: 0xE7
  def cp_move_android(), do: 0xEA
  def cp_quick_slot(), do: 0xED
  def cp_pam_song(), do: 0xF0

  # Mobs/Life
  def cp_move_life(), do: 0xF7
  def cp_auto_aggro(), do: 0xF8
  def cp_friendly_damage(), do: 0xFB
  def cp_monster_bomb(), do: 0xFC
  def cp_hypnotize_dmg(), do: 0xFD
  def cp_mob_skill_delay_end(), do: 0xFE
  def cp_mob_bomb(), do: 0xFF
  def cp_mob_node(), do: 0x100
  def cp_display_node(), do: 0x101
  def cp_npc_action(), do: 0x106

  # Reactors
  def cp_damage_reactor(), do: 0x10F
  def cp_touch_reactor(), do: 0x110

  # Events/Games
  def cp_snowball(), do: 0x119
  def cp_left_knock_back(), do: 0x11A
  def cp_coconut(), do: 0x11B
  def cp_monster_carnival(), do: 0x125
  def cp_ship_object(), do: 0x127
  def cp_party_search_start(), do: 0x129
  def cp_party_search_stop(), do: 0x12A

  # Cash Shop
  def cp_cs_update(), do: 0x135
  def cp_buy_cs_item(), do: 0x136
  def cp_coupon_code(), do: 0x137

  # MTS
  def cp_mapletv(), do: 0x140
  def cp_touching_mts(), do: 0x159
  def cp_mts_tab(), do: 0x15A

  # Custom (server-specific)
  def cp_inject_packet(), do: 0x5002
  def cp_set_code_page(), do: 0x5003

  # Special (negative offsets from other opcodes)
  def cp_change_set(), do: 0x7FFE
  def cp_get_book_info(), do: 0x7FFA
  def cp_reissue_medal(), do: 0x7FFB
  def cp_click_reactor(), do: 0x7FFC

  # ==================================================================================================
  # Server → Client (Send Opcodes) - From sendops.properties
  # ==================================================================================================

  # General
  def lp_alive_req(), do: 0x0D

  # Login
  def lp_login_status(), do: 0x01
  def lp_serverstatus(), do: 0x03
  def lp_serverlist(), do: 0x06
  def lp_charlist(), do: 0x07
  def lp_server_ip(), do: 0x08
  def lp_char_name_response(), do: 0x09
  def lp_add_new_char_entry(), do: 0x0A
  def lp_delete_char_response(), do: 0x0B
  def lp_change_channel(), do: 0x0C
  def lp_cs_use(), do: 0x0E
  def lp_channel_selected(), do: 0x10
  def lp_relog_response(), do: 0x12
  def lp_rsa_key(), do: 0x13
  def lp_enable_recommended(), do: 0x15
  def lp_send_recommended(), do: 0x16
  def lp_login_auth(), do: 0x17
  def lp_secondpw_error(), do: 0x18

  # Inventory/Stats
  def lp_modify_inventory_item(), do: 0x19
  def lp_update_inventory_slot(), do: 0x1A
  def lp_update_stats(), do: 0x1B
  def lp_give_buff(), do: 0x1C
  def lp_cancel_buff(), do: 0x1D
  def lp_temp_stats(), do: 0x1E
  def lp_temp_stats_reset(), do: 0x1F
  def lp_update_skills(), do: 0x20
  def lp_fame_response(), do: 0x22
  def lp_show_status_info(), do: 0x23
  def lp_show_notes(), do: 0x24
  def lp_trock_locations(), do: 0x25
  def lp_anti_macro_result(), do: 0x26
  def lp_update_mount(), do: 0x2B
  def lp_show_quest_completion(), do: 0x2C
  def lp_send_title_box(), do: 0x2D
  def lp_fishing_store(), do: 0x2E
  def lp_use_skill_book(), do: 0x2F
  def lp_sp_reset(), do: 0x30
  def lp_report(), do: 0x31
  def lp_finish_sort(), do: 0x33
  def lp_finish_gather(), do: 0x34
  def lp_char_info(), do: 0x37

  # Social/Party/Guild
  def lp_party_operation(), do: 0x38
  def lp_expedition_operation(), do: 0x3A
  def lp_buddylist(), do: 0x3B
  def lp_guild_operation(), do: 0x3D
  def lp_alliance_operation(), do: 0x3E

  # Map Effects/Environment
  def lp_spawn_portal(), do: 0x3F
  def lp_mech_portal(), do: 0x40
  def lp_servermessage(), do: 0x41
  def lp_pigmi_reward(), do: 0x42
  def lp_owl_of_minerva(), do: 0x43
  def lp_engage_request(), do: 0x45
  def lp_engage_result(), do: 0x46
  def lp_yellow_chat(), do: 0x4A
  def lp_shop_discount(), do: 0x4B
  def lp_catch_mob(), do: 0x4C
  def lp_fishing_board_update(), do: 0x55
  def lp_bbs_operation(), do: 0x56
  def lp_avatar_mega(), do: 0x58
  def lp_player_npc(), do: 0x5D

  # Special Systems
  def lp_energy(), do: 0x69
  def lp_ghost_point(), do: 0x6A
  def lp_ghost_status(), do: 0x6B
  def lp_fairy_pend_msg(), do: 0x6C

  # Family
  def lp_send_pedigree(), do: 0x6D
  def lp_open_family(), do: 0x6E
  def lp_family_message(), do: 0x6F
  def lp_family_invite(), do: 0x70
  def lp_family_junior(), do: 0x71
  def lp_senior_message(), do: 0x72
  def lp_family(), do: 0x73
  def lp_rep_increase(), do: 0x74
  def lp_family_loggedin(), do: 0x75
  def lp_family_buff(), do: 0x76
  def lp_family_use_request(), do: 0x77
  def lp_level_update(), do: 0x78
  def lp_marriage_update(), do: 0x79
  def lp_job_update(), do: 0x7A
  def lp_pendant_slot(), do: 0x7B

  # Misc UI/Messages
  def lp_follow_request(), do: 0x7C
  def lp_top_msg(), do: 0x7E
  def lp_mid_msg(), do: 0x7F
  def lp_clear_mid_msg(), do: 0x80
  def lp_update_jaguar(), do: 0x82
  def lp_ultimate_explorer(), do: 0x84
  def lp_gm_police(), do: 0x88
  def lp_pam_song(), do: 0x89
  def lp_profession_info(), do: 0x8B
  def lp_item_pot(), do: 0x8D
  def lp_skill_macro(), do: 0x8F

  # Warps/Shops
  def lp_warp_to_map(), do: 0x90
  def lp_mts_open(), do: 0x91
  def lp_cs_open(), do: 0x92
  def lp_login_welcome(), do: 0x94
  def lp_server_blocked(), do: 0x97
  def lp_pvp_blocked(), do: 0x98

  # Effects
  def lp_show_equip_effect(), do: 0x99
  def lp_multichat(), do: 0x9A
  def lp_whisper(), do: 0x9B
  def lp_boss_env(), do: 0x9D
  def lp_move_env(), do: 0x9E
  def lp_update_env(), do: 0x9F
  def lp_map_effect(), do: 0xA1
  def lp_cash_song(), do: 0xA2
  def lp_gm_effect(), do: 0xA3
  def lp_ox_quiz(), do: 0xA4
  def lp_gmevent_instructions(), do: 0xA5
  def lp_clock(), do: 0xA6
  def lp_boat_eff(), do: 0xA7
  def lp_boat_effect(), do: 0xA8
  def lp_stop_clock(), do: 0xAC

  # Mini-games
  def lp_pyramid_update(), do: 0xAF
  def lp_pyramid_result(), do: 0xB0
  def lp_quick_slot(), do: 0xB1
  def lp_move_platform(), do: 0xB2

  # PVP
  def lp_pvp_info(), do: 0xB6
  def lp_public_npc(), do: 0xB7

  # Players
  def lp_spawn_player(), do: 0xB8
  def lp_remove_player_from_map(), do: 0xB9
  def lp_chattext(), do: 0xBA
  def lp_chalkboard(), do: 0xBC
  def lp_update_char_box(), do: 0xBD
  def lp_show_scroll_effect(), do: 0xBF
  def lp_show_potential_effect(), do: 0xC1
  def lp_show_potential_reset(), do: 0xC2
  def lp_player_damaged(), do: 0xC3
  def lp_pvp_attack(), do: 0xC4
  def lp_pvp_mist(), do: 0xC5
  def lp_pvp_cool(), do: 0xC6
  def lp_tesla_triangle(), do: 0xC7
  def lp_fishing_caught(), do: 0xC8
  def lp_pams_song(), do: 0xC9
  def lp_follow_effect(), do: 0xCA
  def lp_craft_effect(), do: 0xCC
  def lp_craft_complete(), do: 0xCD
  def lp_harvested(), do: 0xCE

  # Pets
  def lp_spawn_pet(), do: 0xD1
  def lp_move_pet(), do: 0xD4
  def lp_pet_chat(), do: 0xD5
  def lp_pet_namechange(), do: 0xD6
  def lp_pet_update(), do: 0xD7
  def lp_pet_command(), do: 0xD8

  # Dragon/Android
  def lp_dragon_spawn(), do: 0xD9
  def lp_dragon_move(), do: 0xDA
  def lp_dragon_remove(), do: 0xDB
  def lp_android_spawn(), do: 0xDC
  def lp_android_move(), do: 0xDD
  def lp_android_emotion(), do: 0xDE
  def lp_android_remove(), do: 0xDF
  def lp_android_deactivated(), do: 0xE0

  # Player Actions
  def lp_move_player(), do: 0xE2
  def lp_close_range_attack(), do: 0xE4
  def lp_ranged_attack(), do: 0xE5
  def lp_magic_attack(), do: 0xE6
  def lp_energy_attack(), do: 0xE7
  def lp_skill_effect(), do: 0xE8
  def lp_cancel_skill_effect(), do: 0xEA
  def lp_damage_player(), do: 0xEB
  def lp_facial_expression(), do: 0xEC
  def lp_show_item_effect(), do: 0xED
  def lp_show_chair(), do: 0xF0
  def lp_update_char_look(), do: 0xF1
  def lp_show_foreign_effect(), do: 0xF2
  def lp_give_foreign_buff(), do: 0xF3
  def lp_cancel_foreign_buff(), do: 0xF4
  def lp_update_partymember_hp(), do: 0xF5
  def lp_load_guild_name(), do: 0xF6
  def lp_load_guild_icon(), do: 0xF7
  def lp_load_team(), do: 0xF8
  def lp_show_harvest(), do: 0xF9
  def lp_pvp_hp(), do: 0xFA
  def lp_cancel_chair(), do: 0xFC
  def lp_show_item_gain_inchat(), do: 0xFF
  def lp_current_map_warp(), do: 0x100
  def lp_mesobag_success(), do: 0x101
  def lp_mesobag_failure(), do: 0x102
  def lp_update_quest_info(), do: 0x104
  def lp_buff_bar(), do: 0x108
  def lp_pet_flag_change(), do: 0x10A

  # Repair
  def lp_repair_window(), do: 0x115
  def lp_cygnus_intro_lock(), do: 0x116
  def lp_cygnus_intro_disable_ui(), do: 0x117
  def lp_summon_hint(), do: 0x118
  def lp_summon_hint_msg(), do: 0x119
  def lp_aran_combo(), do: 0x11A
  def lp_aran_combo_recharge(), do: 0x11B
  def lp_game_poll_reply(), do: 0x11E
  def lp_spouse_message(), do: 0x11F
  def lp_follow_move(), do: 0x124
  def lp_follow_msg(), do: 0x125
  def lp_game_poll_question(), do: 0x127
  def lp_create_ultimate(), do: 0x128
  def lp_harvest_message(), do: 0x129
  def lp_open_bag(), do: 0x12B
  def lp_dragon_blink(), do: 0x12D
  def lp_pvp_icegage(), do: 0x12E
  def lp_cooldown(), do: 0x12F

  # Summons
  def lp_spawn_summon(), do: 0x131
  def lp_remove_summon(), do: 0x132
  def lp_move_summon(), do: 0x133
  def lp_summon_attack(), do: 0x134
  def lp_pvp_summon(), do: 0x135
  def lp_summon_skill(), do: 0x136
  def lp_damage_summon(), do: 0x137

  # Monsters
  def lp_spawn_monster(), do: 0x13A
  def lp_kill_monster(), do: 0x13B
  def lp_spawn_monster_control(), do: 0x13C
  def lp_move_monster(), do: 0x13D
  def lp_move_monster_response(), do: 0x13E
  def lp_apply_monster_status(), do: 0x140
  def lp_cancel_monster_status(), do: 0x141
  def lp_mob_to_mob_damage(), do: 0x142
  def lp_damage_monster(), do: 0x144
  def lp_show_monster_hp(), do: 0x148
  def lp_show_magnet(), do: 0x149
  def lp_catch_monster(), do: 0x14A
  def lp_monster_properties(), do: 0x14D
  def lp_remove_talk_monster(), do: 0x14E
  def lp_talk_monster(), do: 0x14F

  # NPCs
  def lp_spawn_npc(), do: 0x156
  def lp_remove_npc(), do: 0x157
  def lp_spawn_npc_request_controller(), do: 0x158
  def lp_npc_action(), do: 0x159
  def lp_npc_set_script(), do: 0x15F

  # Merchants
  def lp_spawn_hired_merchant(), do: 0x161
  def lp_destroy_hired_merchant(), do: 0x162
  def lp_update_hired_merchant(), do: 0x163

  # Map Objects
  def lp_drop_item_from_mapobject(), do: 0x165
  def lp_remove_item_from_map(), do: 0x167
  def lp_spawn_mist(), do: 0x16B
  def lp_remove_mist(), do: 0x16C
  def lp_spawn_door(), do: 0x16D
  def lp_remove_door(), do: 0x16E
  def lp_mech_door_spawn(), do: 0x16F
  def lp_mech_door_remove(), do: 0x170

  # Reactors
  def lp_reactor_hit(), do: 0x171
  def lp_reactor_spawn(), do: 0x173
  def lp_reactor_destroy(), do: 0x174
  def lp_spawn_extractor(), do: 0x176
  def lp_remove_extractor(), do: 0x177

  # Mini-games/Events
  def lp_roll_snowball(), do: 0x178
  def lp_hit_snowball(), do: 0x179
  def lp_snowball_message(), do: 0x17A
  def lp_left_knock_back(), do: 0x17B
  def lp_hit_coconut(), do: 0x17C
  def lp_coconut_score(), do: 0x17D
  def lp_monster_carnival_start(), do: 0x180
  def lp_monster_carnival_obtained_cp(), do: 0x181
  def lp_monster_carnival_party_cp(), do: 0x182
  def lp_monster_carnival_summon(), do: 0x183
  def lp_monster_carnival_died(), do: 0x186
  def lp_chaos_horntail_shrine(), do: 0x18E
  def lp_chaos_zakum_shrine(), do: 0x18F
  def lp_horntail_shrine(), do: 0x190
  def lp_english_quiz(), do: 0x191

  # PVP (continued)
  def lp_pvp_type(), do: 0x192
  def lp_pvp_transform(), do: 0x193
  def lp_pvp_enabled(), do: 0x195
  def lp_pvp_score(), do: 0x196
  def lp_pvp_result(), do: 0x197
  def lp_pvp_team(), do: 0x198
  def lp_pvp_scoreboard(), do: 0x199
  def lp_pvp_points(), do: 0x19B
  def lp_pvp_killed(), do: 0x19C
  def lp_pvp_mode(), do: 0x19D
  def lp_pvp_iceknight(), do: 0x19E
  def lp_capture_flags(), do: 0x19F
  def lp_capture_position(), do: 0x1A0
  def lp_capture_reset(), do: 0x1A1

  # NPC/Shop Interactions
  def lp_npc_talk(), do: 0x1A3
  def lp_open_npc_shop(), do: 0x1A5
  def lp_confirm_shop_transaction(), do: 0x1A6
  def lp_open_storage(), do: 0x1A9
  def lp_merch_item_msg(), do: 0x1AA
  def lp_merch_item_store(), do: 0x1AB
  def lp_rps_game(), do: 0x1AC
  def lp_messenger(), do: 0x1AD
  def lp_player_interaction(), do: 0x1AE
  def lp_duey(), do: 0x1B6

  # Cash Shop
  def lp_cs_update(), do: 0x1B8
  def lp_cs_operation(), do: 0x1B9
  def lp_xmas_surprise(), do: 0x1BD

  # Input
  def lp_keymap(), do: 0x1C5
  def lp_pet_auto_hp(), do: 0x1C6
  def lp_pet_auto_mp(), do: 0x1C7

  # TV/MTS
  def lp_start_tv(), do: 0x1CD
  def lp_remove_tv(), do: 0x1CE
  def lp_enable_tv(), do: 0x1CF
  def lp_vicious_hammer(), do: 0x1D3
  def lp_get_mts_tokens(), do: 0x1D7
  def lp_mts_operation(), do: 0x1D8

  # Custom (server-specific)
  def lp_damage_skin(), do: 0x5000
  def lp_open_website(), do: 0x5001
  def lp_perfect_pitch(), do: 0x5002
  def lp_get_code_page(), do: 0x5003

  # Special (calculated/custom offsets)
  def lp_block_portal(), do: 0x7FFA
  def lp_ariant_scoreboard(), do: 0x7FFB
  def lp_player_hint(), do: 0x7FFC
  def lp_ariant_thing(), do: 0x7FFD
  def lp_ariant_pq_start(), do: 0x7FAE
  def lp_npc_confirm(), do: 0x7FBE
  def lp_pin_assigned(), do: 0x7FCE
  def lp_all_charlist(), do: 0x7FDE
  def lp_get_card(), do: 0x7FEE
  def lp_card_set(), do: 0x7FEE
  def lp_book_stats(), do: 0x7FEA
  def lp_book_info(), do: 0x7FEB
  def lp_party_search(), do: 0x7FEC
  def lp_member_search(), do: 0x7FED

  # ==================================================================================================
  # Helper Functions
  # ==================================================================================================

  @doc """
  Returns a human-readable name for a given opcode value.
  Useful for debugging and logging.
  """
  def name_for(opcode) when is_integer(opcode) do
    case opcode do
      # Client opcodes (common ones for debugging)
      0x01 -> "CP_CLIENT_HELLO"
      0x02 -> "CP_LOGIN_PASSWORD"
      0x0D -> "CP_PLAYER_LOGGEDIN"
      0x19 -> "CP_CHAR_SELECT"
      0x23 -> "CP_CHANGE_MAP"
      0x24 -> "CP_CHANGE_CHANNEL"
      0x2A -> "CP_MOVE_PLAYER"
      0x36 -> "CP_GENERAL_CHAT"
      0x40 -> "CP_NPC_TALK"
      0xA0 -> "CP_PARTYCHAT"
      0xA1 -> "CP_WHISPER"

      # Server opcodes (common ones for debugging)
      0x01 -> "LP_LOGIN_STATUS"
      0x06 -> "LP_SERVERLIST"
      0x07 -> "LP_CHARLIST"
      0x0D -> "LP_ALIVE_REQ"
      0xB8 -> "LP_SPAWN_PLAYER"
      0xB9 -> "LP_REMOVE_PLAYER_FROM_MAP"
      0xBA -> "LP_CHATTEXT"
      0xE2 -> "LP_MOVE_PLAYER"
      0x9A -> "LP_MULTICHAT"
      0x9B -> "LP_WHISPER"
      0x1A3 -> "LP_NPC_TALK"

      _ -> "UNKNOWN_0x#{Integer.to_string(opcode, 16) |> String.upcase()}"
    end
  end

  @doc """
  Validates if an opcode is a known client packet.
  """
  def valid_client_opcode?(opcode) when is_integer(opcode) do
    opcode in [
      # Add all valid client opcodes here for validation
      0x01,
      0x02,
      0x04,
      0x05,
      0x06,
      0x0D,
      0x0E,
      0x12,
      0x14,
      0x15,
      0x16,
      0x17,
      0x18,
      0x19,
      0x1A,
      0x1D,
      0x1E,
      0x20,
      0x23,
      0x24,
      0x25,
      0x26,
      0x27,
      0x29,
      0x2A,
      0x2C,
      0x2D,
      0x2F,
      0x30,
      0x31,
      0x32,
      0x34,
      0x35,
      0x36,
      0x37,
      0x38,
      0x39,
      0x3A,
      0x3B,
      0x40,
      0x42,
      0x43,
      0x44,
      0x45,
      0x47,
      0x48,
      0x49,
      0x4A,
      0x4B,
      0x4D,
      0x4E,
      0x4F,
      0x50,
      0x51,
      0x53,
      0x54,
      0x56,
      0x57,
      0x58,
      0x59,
      0x5A,
      0x5B,
      0x5D,
      0x5E,
      0x60,
      0x61,
      0x62,
      0x63,
      0x64,
      0x65,
      0x66,
      0x68,
      0x69,
      0x6A,
      0x6B,
      0x6C,
      0x6E,
      0x6F,
      0x70,
      0x71,
      0x72,
      0x73,
      0x75,
      0x76,
      0x78,
      0x79,
      0x7B,
      0x7C,
      0x7D,
      0x7E,
      0x7F,
      0x81,
      0x84,
      0x86,
      0x87,
      0x88,
      0x89,
      0x8C,
      0x8D,
      0x8E,
      0x91,
      0x92,
      0x94,
      0x95,
      0x97,
      0x98,
      0x99,
      0x9A,
      0x9B,
      0x9C,
      0x9D,
      0xA0,
      0xA1,
      0xA2,
      0xA3,
      0xA4,
      0xA5,
      0xA6,
      0xA7,
      0xA8,
      0xA9,
      0xAA,
      0xAB,
      0xAC,
      0xAD,
      0xAF,
      0xB0,
      0xB2,
      0xB3,
      0xB4,
      0xB5,
      0xBA,
      0xBB,
      0xBC,
      0xBD,
      0xBE,
      0xBF,
      0xC0,
      0xC1,
      0xC2,
      0xC3,
      0xC4,
      0xC5,
      0xC6,
      0xC8,
      0xC9,
      0xCA,
      0xCD,
      0xD2,
      0xD3,
      0xD4,
      0xD7,
      0xD8,
      0xD9,
      0xDA,
      0xDB,
      0xDF,
      0xE0,
      0xE1,
      0xE2,
      0xE3,
      0xE4,
      0xE7,
      0xEA,
      0xED,
      0xF0,
      0xF7,
      0xF8,
      0xFB,
      0xFC,
      0xFD,
      0xFE,
      0xFF,
      0x100,
      0x101,
      0x106,
      0x10C,
      0x10F,
      0x110,
      0x114,
      0x119,
      0x11A,
      0x11B,
      0x125,
      0x127,
      0x129,
      0x12A,
      0x12E,
      0x12F,
      0x135,
      0x136,
      0x137,
      0x140,
      0x142,
      0x143,
      0x144,
      0x159,
      0x15A
    ]
  end

  def valid_client_opcode?(_), do: false
end