part of Bot class

include/Bot.hpp

@@ -1,6 +1,60 @@
 #pragma once
 
-class Bot {
+#include <optional>
+
+#include "Map.hpp"
+#include "Snake.hpp"
+
+class Bot : public Snake, public GameObject {
 public:
+  struct Config {
+    float time_between_targets;
+    double speed;
+    float move_interval;
+  };
+
+  Bot(canvas::SnakeObject obj, Config config, Map &map)
+      : Snake(obj), config_(config), map_(map), real_pos_(obj.pos) {}
+
+  void act(float dt) override {
+    time_from_target_set_ += dt;
+
+    int eaten = map_.eat(utils::to_world_coord(pos), 20);
+    inc_length(eaten);
+
+    if (not target_.has_value() or
+        time_from_target_set_ >= config_.time_between_targets or
+        (target_.value() - real_pos_).len_sq() < radius * radius) {
+      time_from_target_set_ = 0;
+
+      target_ = map_.find_nearest_food(real_pos_); // TODO
+    }
+
+    direction_ = (Vecf(target_.value()) - real_pos_).norm();
+    // TODO: manually change direction
+
+    move(dt);
+  }
+
+  void draw(Veci offset) override { Snake::draw(offset); }
+
+protected:
+  void move(float dt) {
+    real_pos_ += direction_ * dt * config_.speed;
+    move_time_delta_ += dt;
+    if (move_time_delta_ > config_.move_interval) {
+      move_time_delta_ -= config_.move_interval;
+      add(Veci(real_pos_));
+    }
+  }
+
 private:
+  const Config config_;
+  Map &map_;
+
+  Vecf real_pos_;
+  Vecf direction_ = {};
+  std::optional<Vecf> target_ = {};
+  float time_from_target_set_ = 0;
+  float move_time_delta_ = 0;
 };