attacker.cpp

// Copyright (c) 2024 ibis-ssl
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.

#include <crane_robot_skills/attacker.hpp>

namespace crane::skills
{
Attacker::Attacker(RobotCommandWrapperBase::SharedPtr & base)
: SkillBaseWithState<AttackerState, RobotCommandWrapperPosition>(
    "Attacker", base, AttackerState::ENTRY_POINT),
  kick_target(getContextReference<Point>("kick_target")),
  forced_pass_receiver_id(getContextReference<int>("forced_pass_receiver")),
  forced_pass_phase(getContextReference<int>("forced_pass_phase", 0)),
  kick_skill(base),
  goal_kick_skill(base),
  receive_skill(base),
  steal_ball_skill(base)
{
  setPreUpdateFunction([&]() { command.clearSkillStates(); });
  receive_skill.setParameter("policy", std::string("closest"));
  addStateFunction(AttackerState::ENTRY_POINT, [this]() -> Status {
    command.setTargetPosition(world_model()->ball.pos);
    pass_receiver_id = std::nullopt;
    return Status::RUNNING;
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::FORCED_PASS, [this]() -> bool {
    // セットプレイのときは強制パス
    auto game_command = world_model()->getMsg().play_situation.command.value;
    // ボールの停止条件は、INPLAY切り替わりの遅延対策
    if (
      (game_command == crane_msgs::msg::PlaySituation::OUR_DIRECT_FREE ||
       game_command == crane_msgs::msg::PlaySituation::OUR_KICKOFF_START) &&
      world_model()->ball.isStopped()) {
      if (auto best_receiver = selectPassReceiver(); best_receiver) {
        forced_pass_receiver_id = best_receiver->id;
        auto receiver = world_model()->getOurRobot(forced_pass_receiver_id);
        pass_receiver_id = best_receiver->id;
        kick_skill.setParameter("target", receiver->pose.pos);
        forced_pass_phase = 1;
        return true;
      } else {
        return false;
      }
    } else {
      return false;
    }
  });

  // ----- ダブルタッチ防止の為、FORCED_PASS -> ENTRY_POINT の状態遷移は設けない ------- //

  addStateFunction(AttackerState::FORCED_PASS, [this]() -> Status {
    switch (forced_pass_phase) {
      case 0: {
        // 90度別の方向で構えて敵のプレッシャーをかわす
        Point target = world_model()->ball.pos +
                       getVerticalVec(kick_target - world_model()->ball.pos).normalized() * 0.3;
        command.setTargetPosition(target).lookAtBallFrom(target).enableBallAvoidance();
        if (robot()->getDistance(target) < 0.1) {
          forced_pass_phase = 1;
        }
        break;
      }
      case 1: {
        // パス
        command.disableBallAvoidance();
        kick_skill.setParameter("dot_threshold", 0.95);
        if (pass_receiver_id) {
          kick_target = world_model()->getOurRobot(pass_receiver_id.value())->pose.pos;
        }
        kick_skill.setParameter("target", kick_target);
        Segment kick_line{world_model()->ball.pos, kick_target};
        // 近くに敵ロボットがいればチップキック
        bool chip_kick = false;
        if (auto nearest_enemy = world_model()->getNearestRobotWithDistanceFromSegment(
              kick_line, world_model()->theirs.getAvailableRobots());
            nearest_enemy.has_value()) {
          if (
            nearest_enemy->distance < 0.4 &&
            nearest_enemy->robot->getDistance(world_model()->ball.pos) < 2.0) {
            chip_kick = true;
          }
        }
        if (chip_kick) {
          kick_skill.setParameter("chip_kick", true);
          kick_skill.setParameter("kick_power", 0.9);
          kick_skill.setParameter("with_dribble", true);
          kick_skill.setParameter("dribble_power", 0.7);
        } else {
          kick_skill.setParameter("kick_power", 0.2);
          kick_skill.setParameter("chip_kick", false);
          kick_skill.setParameter("dribble_power", 0.0);
        }
        kick_skill.run();
        break;
      }
      default:
        return Status::FAILURE;
    }
    return Status::RUNNING;
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::STEAL_BALL, [this]() -> bool {
    // 止まっているボールを相手が持っているとき
    auto nearest = world_model()->getNearestRobotWithDistanceFromPoint(
      world_model()->ball.pos, world_model()->theirs.getAvailableRobots());
    return nearest.has_value() && world_model()->ball.isStopped(0.1) && nearest->distance < 0.5;
  });

  addTransition(AttackerState::STEAL_BALL, AttackerState::ENTRY_POINT, [this]() -> bool {
    return world_model()->ball.isMoving(1.0);
  });

  addStateFunction(AttackerState::STEAL_BALL, [this]() -> Status {
    SvgCircleBuilder circle_builder;
    circle_builder.center(world_model()->ball.pos)
      .radius(0.25)
      .stroke("blue")
      .fill("white")
      .strokeWidth(10);
    visualizer->add(circle_builder.getSvgString());

    return steal_ball_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::REDIRECT_GOAL_KICK, [this]() -> bool {
    // ボールが遠くにいる/動いている/自分に向かってきている
    if (
      robot()->getDistance(world_model()->ball.pos) > 1.0 && world_model()->ball.vel.norm() > 1.0 &&
      world_model()->ball.isMovingTowards(robot()->pose.pos)) {
      auto [best_angle, goal_angle_width] =
        world_model()->getLargestGoalAngleRangeFromPoint(robot()->pose.pos);
      double angle_diff_deg =
        std::abs(getAngleDiff(getAngle(world_model()->ball.pos - robot()->pose.pos), best_angle)) *
        180.0 / M_PI;
      if (goal_angle_width * 180.0 / M_PI > 10. && angle_diff_deg < 90.) {
        // ゴールが見えている && リダイレクト角度が90度以内
        return true;
      }
    }
    return false;
  });

  addTransition(AttackerState::REDIRECT_GOAL_KICK, AttackerState::ENTRY_POINT, [this]() -> bool {
    // ボールが止まっている
    if (world_model()->ball.vel.norm() < 1.0) {
      return true;
    } else {
      return false;
    }
  });

  addStateFunction(AttackerState::REDIRECT_GOAL_KICK, [this]() -> Status {
    auto target = [&]() -> Point {
      double angle = GoalKick::getBestAngleToShootFromPoint(
        10.0 * M_PI / 180., robot()->pose.pos, world_model());
      Segment shoot_line{robot()->pose.pos, robot()->pose.pos + getNormVec(angle) * 10.};
      Segment goal_line;
      goal_line.first << world_model()->getTheirGoalCenter().x(),
        -world_model()->field_size.y() * 0.5;
      goal_line.second << world_model()->getTheirGoalCenter().x(),
        world_model()->field_size.y() * 0.5;
      if (auto intersection_points = getIntersections(shoot_line, goal_line);
          intersection_points.empty()) {
        return world_model()->getTheirGoalCenter();
      } else {
        return intersection_points.front();
      }
    }();

    receive_skill.setParameter("enable_redirect", true);
    receive_skill.setParameter("redirect_target", target);
    receive_skill.setParameter("policy", std::string("closest"));
    receive_skill.setParameter("redirect_kick_power", 0.2);
    return receive_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::GOAL_KICK, [this]() -> bool {
    auto [best_angle, goal_angle_width] =
      world_model()->getLargestGoalAngleRangeFromPoint(world_model()->ball.pos);
    // ボールが近い条件はいらないかも？
    return robot()->getDistance(world_model()->ball.pos) < 2.0 &&
           goal_angle_width * 180.0 / M_PI > 5. && not world_model()->ball.isMoving(1.0);
  });

  addTransition(AttackerState::GOAL_KICK, AttackerState::ENTRY_POINT, [this]() -> bool {
    // ボールが早い
    return world_model()->ball.isMoving(1.0);
  });

  addStateFunction(AttackerState::GOAL_KICK, [this]() -> Status {
    goal_kick_skill.setParameter("dot_threshold", 0.95);
    goal_kick_skill.setParameter("キック角度の最低要求精度[deg]", 5.0);
    return goal_kick_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::CLEARING_KICK, [this]() -> bool {
    // 未実装：やばいときに蹴る
    return false;
  });

  addStateFunction(AttackerState::CLEARING_KICK, [this]() -> Status {
    kick_skill.setParameter("target", world_model()->getTheirGoalCenter());
    kick_skill.setParameter("kick_power", 0.8);
    kick_skill.setParameter("dot_threshold", 0.9);
    kick_skill.setParameter("chip_kick", true);
    return kick_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::STANDARD_PASS, [this]() -> bool {
    if (robot()->getDistance(world_model()->ball.pos) > 1.0 or world_model()->ball.isMoving(1.0)) {
      return false;
    }

    auto our_robots = world_model()->ours.getAvailableRobots(robot()->id, true);
    const auto enemy_robots = world_model()->theirs.getAvailableRobots();
    double best_score = 0.0;
    Point best_target;
    for (const auto score_with_id : world_model()->getMsg().game_analysis.pass_scores) {
      if (score_with_id.id != robot()->id) {
        continue;
      } else if (score_with_id.id != world_model()->getOurGoalieId()) {
        continue;
      } else {
        kick_target = world_model()->getOurRobot(score_with_id.id)->pose.pos;
        pass_receiver_id = score_with_id.id;
        return true;
      }
    }
    return false;
  });

  addTransition(AttackerState::STANDARD_PASS, AttackerState::ENTRY_POINT, [this]() -> bool {
    // ボールが早い
    if (world_model()->ball.isMoving(1.0)) {
      pass_receiver_id = std::nullopt;
      return true;
    }
    return false;
  });

  addStateFunction(AttackerState::STANDARD_PASS, [this]() -> Status {
    if (pass_receiver_id) {
      kick_target = world_model()->getOurRobot(pass_receiver_id.value())->pose.pos;
    }

    auto our_robots = world_model()->ours.getAvailableRobots(robot()->id);
    const auto enemy_robots = world_model()->theirs.getAvailableRobots();

    SvgLineBuilder line_builder;
    line_builder.start(world_model()->ball.pos).end(kick_target).stroke("red").strokeWidth(10);
    visualizer->add(line_builder.getSvgString());

    kick_skill.setParameter("target", kick_target);
    Segment ball_to_target{world_model()->ball.pos, kick_target};
    if (auto nearest_enemy = world_model()->getNearestRobotWithDistanceFromSegment(
          ball_to_target, world_model()->theirs.getAvailableRobots());
        nearest_enemy.has_value()) {
      if (nearest_enemy->robot->getDistance(world_model()->ball.pos) < 2.0) {
        kick_skill.setParameter("chip_kick", true);
      }
    }
    kick_skill.setParameter("kick_power", 0.4);
    kick_skill.setParameter("dot_threshold", 0.97);
    return kick_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::LOW_CHANCE_GOAL_KICK, [this]() -> bool {
    // ボールが近く、相手コートにいるとき（本当にチャンスが無いとき(隙間が1deg以下)は除外）
    double x_diff_with_their_goal =
      std::abs(world_model()->getTheirGoalCenter().x() - world_model()->ball.pos.x());
    auto [best_angle, goal_angle_width] =
      world_model()->getLargestGoalAngleRangeFromPoint(world_model()->ball.pos);
    return robot()->getDistance(world_model()->ball.pos) < 1.0 &&
           x_diff_with_their_goal < world_model()->field_size.x() * 0.5 &&
           goal_angle_width * 180.0 / M_PI > 1. && not world_model()->ball.isMoving(1.0);
  });

  addTransition(AttackerState::LOW_CHANCE_GOAL_KICK, AttackerState::ENTRY_POINT, [this]() -> bool {
    return world_model()->ball.isMoving(1.0);
  });

  addStateFunction(
    AttackerState::LOW_CHANCE_GOAL_KICK, [this]() -> Status { return goal_kick_skill.run(); });

  addTransition(
    AttackerState::ENTRY_POINT, AttackerState::MOVE_BALL_TO_OPPONENT_HALF, [this]() -> bool {
      // ボールに近く、自コートにいるとき
      double x_diff_with_their_goal =
        std::abs(world_model()->getTheirGoalCenter().x() - world_model()->ball.pos.x());
      return robot()->getDistance(world_model()->ball.pos) < 1.0 &&
             x_diff_with_their_goal >= world_model()->field_size.x() * 0.5 &&
             not world_model()->ball.isMoving(1.0);
    });

  addTransition(
    AttackerState::MOVE_BALL_TO_OPPONENT_HALF, AttackerState::ENTRY_POINT,
    [this]() -> bool { return world_model()->ball.isMoving(1.0); });

  addStateFunction(AttackerState::MOVE_BALL_TO_OPPONENT_HALF, [this]() -> Status {
    kick_skill.setParameter("target", world_model()->getTheirGoalCenter());
    kick_skill.setParameter("kick_power", 0.8);
    kick_skill.setParameter("dot_threshold", 0.95);
    kick_skill.setParameter("chip_kick", true);
    command.disableBallAvoidance();
    return kick_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::RECEIVE_BALL, [this]() -> bool {
    if (
      world_model()->ball.vel.norm() < 1.0 or
      world_model()->ball.isMovingAwayFrom(robot()->pose.pos)) {
      // ボールが止まっているとき/ボールが自分から離れていっているときはは受け取らない
      return false;
    } else {
      return true;
    }
  });

  addTransition(AttackerState::RECEIVE_BALL, AttackerState::ENTRY_POINT, [this]() -> bool {
    // ボールが止まっている
    if (world_model()->ball.vel.norm() < 1.0) {
      return true;
    } else if (world_model()->ball.isMovingAwayFrom(robot()->pose.pos)) {
      // ボールが自分から離れていっている（多分受取に失敗した）
      return true;
    } else {
      return false;
    }
  });

  addStateFunction(AttackerState::RECEIVE_BALL, [this]() -> Status {
    receive_skill.setParameter("enable_redirect", false);
    receive_skill.setParameter("policy", std::string("min_slack"));
    receive_skill.setParameter("dribble_power", 0.0);
    receive_skill.setParameter("enable_software_bumper", false);
    return receive_skill.run();
  });

  addTransition(AttackerState::RECEIVE_BALL, AttackerState::ENTRY_POINT, [this]() -> bool {
    // 一定以上ボールに触れたら終了
    using std::chrono_literals::operator""s;
    return robot()->ball_contact.getContactDuration() > 0.2s;
  });

  addStateFunction(AttackerState::KICK_TO_GOAL, [this]() -> Status {
    kick_skill.setParameter("target", world_model()->getTheirGoalCenter());
    kick_skill.setParameter("kick_power", 0.9);
    // kick_skill.setParameter("dot_threshold", 0.95);
    kick_skill.setParameter("chip_kick", false);
    return kick_skill.run();
  });

  addTransition(AttackerState::ENTRY_POINT, AttackerState::KICK_TO_GOAL, [this]() -> bool {
    // どこにも当てはまらないときはゴールに向かってシュート
    static int count = 0;
    // 10フレームに1回ENTRY_POINTに戻して様子を見る
    if (count++ > 10) {
      count = 0;
      return true && world_model()->ball.isMoving(1.0);
    } else {
      return false;
    }
  });
}

std::shared_ptr<RobotInfo> Attacker::selectPassReceiver()
{
  auto our_robots = world_model()->ours.getAvailableRobots(robot()->id, true);
  const auto enemy_robots = world_model()->theirs.getAvailableRobots();
  double best_score = 0.0;
  std::shared_ptr<RobotInfo> best_bot = nullptr;
  for (auto & our_robot : our_robots) {
    Segment ball_to_target{world_model()->ball.pos, our_robot->pose.pos};
    auto target = our_robot->pose.pos;
    double score = 1.0;
    // パス先のゴールチャンスが大きい場合はスコアを上げる(30度以上で最大0.5上昇)
    auto [best_angle, goal_angle_width] = world_model()->getLargestGoalAngleRangeFromPoint(target);
    score += std::clamp(goal_angle_width / (M_PI / 12.), 0.0, 0.5);

    // 敵ゴールに近いときはスコアを上げる
    double normed_distance_to_their_goal = ((target - world_model()->getTheirGoalCenter()).norm() -
                                            (world_model()->field_size.x() * 0.5)) /
                                           (world_model()->field_size.x() * 0.5);
    // マイナスのときはゴールに近い
    score *= (1.0 - normed_distance_to_their_goal);

    if (auto nearest_enemy =
          world_model()->getNearestRobotWithDistanceFromSegment(ball_to_target, enemy_robots);
        nearest_enemy) {
      // ボールから遠い敵がパスコースを塞いでいる場合は諦める
      if (
        nearest_enemy->robot->getDistance(world_model()->ball.pos) > 1.0 &&
        nearest_enemy->distance < 0.4) {
        score = 0.0;
      }
      // パスラインに敵がいるときはスコアを下げる
      score *= 1.0 / (1.0 + nearest_enemy->distance);
    }

    if (score > best_score) {
      best_score = score;
      best_bot = our_robot;
    }
  }

  return best_bot;
}
}  // namespace crane::skills