You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: chaco.rs
    path of file: ./repos/doukutsu-rs/src/game/npc/ai
    
    the code of the file until where you have to start completion: use crate::common::Direction;
use crate::framework::error::GameResult;
use crate::game::caret::CaretType;
use crate::game::npc::NPC;
use crate::game::player::Player;
use crate::game::shared_game_state::SharedGameState;
use crate::util::rng::RNG;

impl NPC {
    pub(crate) fn tick_n093_chaco(&mut self, state: &mut SharedGameState, players: [&mut Player; 2]) -> GameResult {
        match self.action_num {
            0 | 1 => {
                if self.action_num == 0 {
                    self.action_num = 1;
                    self.action_counter = 0;
                    self.anim_counter = 0;
                }

                if self.rng.range(0..120) == 10 {
                    self.action_num = 2;
                    self.action_counter = 0;
                    self.anim_num = 1;
                }

                let player = self.get_closest_player_mut(players);
                if (self.x - player.x).abs() < 0x4000

    
    pub(crate) fn tick_n093_chaco(&mut self, state: &mut SharedGameState, players: [&mut Player; 2]) -> GameResult {
        match self.action_num {
            0 | 1 => {
                if self.action_num == 0 {
                    self.action_num = 1;
                    self.action_counter = 0;
                    self.anim_counter = 0;
                }

                if self.rng.range(0..120) == 10 {
                    self.action_num = 2;
                    self.action_counter = 0;
                    self.anim_num = 1;
                }

                let player = self.get_closest_player_mut(players);
                if (self.x - player.x).abs() < 0x4000
                    && self.y - 0x4000 < player.y
                    && self.y + 0x2000 > player.y {
                    self.direction = if self.x > player.x { Direction::Left } else { Direction::Right };
                }
            }
            2 => {
                self.action_counter += 1;
                if self.action_counter > 8 {
                    self.action_num = 1;
                    self.anim_num = 0;
                }
            }
            3 | 4 => {
                if self.action_num == 3 {
                    self.action_num = 4;
                    self.anim_num = 2;
                    self.anim_counter = 0;
                }

                self.animate(4, 2, 5);

                self.x += self.direction.vector_x() * 0x200;
            }
            10 => {
                self.anim_num = 6;

                self.action_counter += 1;
                if self.action_counter > 200 {
                    self.action_counter = 0;

                    state.create_caret(self.x, self.y, CaretType::Zzz, Direction::Left);
                }
            }
            _ => (),
        }

        let dir_offset = if self.direction == Direction::Left { 0 } else { 7 };

        self.anim_rect = state.constants.npc.n093_chaco[self.anim_num as usize + dir_offset];

        Ok(())
    }