#pragma once

// this class is #included into the Copter:: namespace

class FlightMode {
    friend class Copter;
    friend class AP_Arming_Copter;

public:

    FlightMode(Copter &copter) :
        _copter(copter),
        g(copter.g),
        g2(copter.g2),
        wp_nav(_copter.wp_nav),
        pos_control(_copter.pos_control),
        inertial_nav(_copter.inertial_nav),
        ahrs(_copter.ahrs),
        attitude_control(_copter.attitude_control),
        motors(_copter.motors),
        channel_roll(_copter.channel_roll),
        channel_pitch(_copter.channel_pitch),
        channel_throttle(_copter.channel_throttle),
        channel_yaw(_copter.channel_yaw),
        G_Dt(_copter.G_Dt),
        ap(_copter.ap),
        takeoff_state(_copter.takeoff_state),
        ekfGndSpdLimit(_copter.ekfGndSpdLimit),
        ekfNavVelGainScaler(_copter.ekfNavVelGainScaler),
        auto_yaw_mode(_copter.auto_yaw_mode)
        { };

protected:

    virtual bool init(bool ignore_checks) = 0;
    virtual void run() = 0; // should be called at 100hz or more

    virtual bool is_autopilot() const { return false; }
    virtual bool requires_GPS() const = 0;
    virtual bool has_manual_throttle() const = 0;
    virtual bool allows_arming(bool from_gcs) const = 0;
    void print_FlightMode(AP_HAL::BetterStream *port) const {
        port->print(name());
    }
    virtual const char *name() const = 0;

    // returns a string for this flightmode, exactly 4 bytes
    virtual const char *name4() const = 0;

    Copter &_copter;

    // convenience references to avoid code churn in conversion:
    Parameters &g;
    ParametersG2 &g2;
    AC_WPNav *&wp_nav;
    AC_PosControl *&pos_control;
    AP_InertialNav &inertial_nav;
    AP_AHRS &ahrs;
    AC_AttitudeControl_t *&attitude_control;
    MOTOR_CLASS *&motors;
    RC_Channel *&channel_roll;
    RC_Channel *&channel_pitch;
    RC_Channel *&channel_throttle;
    RC_Channel *&channel_yaw;
    float &G_Dt;
    ap_t ≈
    takeoff_state_t &takeoff_state;

    // gnd speed limit required to observe optical flow sensor limits
    float &ekfGndSpdLimit;

    // scale factor applied to velocity controller gain to prevent optical flow noise causing excessive angle demand noise
    float &ekfNavVelGainScaler;

    // Navigation Yaw control
    // auto flight mode's yaw mode
    uint8_t &auto_yaw_mode;

    // pass-through functions to reduce code churn on conversion;
    // these are candidates for moving into the FlightMode base
    // class.
    virtual void get_pilot_desired_lean_angles(float roll_in, float pitch_in, float &roll_out, float &pitch_out, float angle_max) {
        _copter.get_pilot_desired_lean_angles(roll_in, pitch_in, roll_out, pitch_out, angle_max);
    }
    virtual float get_surface_tracking_climb_rate(int16_t target_rate, float current_alt_target, float dt) {
        return _copter.get_surface_tracking_climb_rate(target_rate, current_alt_target, dt);
    }
    virtual float get_pilot_desired_yaw_rate(int16_t stick_angle) {
        return _copter.get_pilot_desired_yaw_rate(stick_angle);
    }
    virtual float get_pilot_desired_climb_rate(float throttle_control) {
        return _copter.get_pilot_desired_climb_rate(throttle_control);
    }
    virtual float get_pilot_desired_throttle(int16_t throttle_control, float thr_mid = 0.0f) {
        return _copter.get_pilot_desired_throttle(throttle_control, thr_mid);
    }
    virtual float get_non_takeoff_throttle() {
        return _copter.get_non_takeoff_throttle();
    }
    virtual void update_simple_mode(void) {
        _copter.update_simple_mode();
    }
    virtual float get_smoothing_gain() {
        return _copter.get_smoothing_gain();
    }
    virtual bool set_mode(control_mode_t mode, mode_reason_t reason) {
        return _copter.set_mode(mode, reason);
    }
    virtual void set_land_complete(bool b) {
        return _copter.set_land_complete(b);
    }
    GCS_Copter &gcs() {
        return _copter.gcs();
    }
    virtual void Log_Write_Event(uint8_t id) {
        return _copter.Log_Write_Event(id);
    }
    virtual void set_throttle_takeoff() {
        return _copter.set_throttle_takeoff();
    }
    virtual void set_auto_yaw_mode(uint8_t yaw_mode) {
        return _copter.set_auto_yaw_mode(yaw_mode);
    }
    void set_auto_yaw_rate(float turn_rate_cds) {
        return _copter.set_auto_yaw_rate(turn_rate_cds);
    }
    void set_auto_yaw_look_at_heading(float angle_deg, float turn_rate_dps, int8_t direction, bool relative_angle) {
        return _copter.set_auto_yaw_look_at_heading(angle_deg, turn_rate_dps, direction, relative_angle);
    }
    virtual void takeoff_timer_start(float alt_cm) {
        return _copter.takeoff_timer_start(alt_cm);
    }
    virtual void takeoff_stop() {
        return _copter.takeoff_stop();
    }
    virtual void takeoff_get_climb_rates(float& pilot_climb_rate, float& takeoff_climb_rate) {
        return _copter.takeoff_get_climb_rates(pilot_climb_rate, takeoff_climb_rate);
    }
    float get_auto_heading() {
        return _copter.get_auto_heading();
    }
    float get_auto_yaw_rate_cds() {
        return _copter.get_auto_yaw_rate_cds();
    }
    float get_avoidance_adjusted_climbrate(float target_rate) {
        return _copter.get_avoidance_adjusted_climbrate(target_rate);
    }
    uint16_t get_pilot_speed_dn() {
        return _copter.get_pilot_speed_dn();
    }

    // end pass-through functions
};


class FlightMode_ACRO : public FlightMode {

public:

    FlightMode_ACRO(Copter &copter) :
        Copter::FlightMode(copter)
        { }
    virtual bool init(bool ignore_checks) override;
    virtual void run() override; // should be called at 100hz or more

    virtual bool is_autopilot() const override { return false; }
    virtual bool requires_GPS() const override { return false; }
    virtual bool has_manual_throttle() const override { return true; }
    virtual bool allows_arming(bool from_gcs) const override { return true; };

protected:

    const char *name() const override { return "ACRO"; }
    const char *name4() const override { return "ACRO"; }

    void get_pilot_desired_angle_rates(int16_t roll_in, int16_t pitch_in, int16_t yaw_in, float &roll_out, float &pitch_out, float &yaw_out);

private:

};

#if FRAME_CONFIG == HELI_FRAME
class FlightMode_ACRO_Heli : public FlightMode_ACRO {

public:

    FlightMode_ACRO_Heli(Copter &copter) :
        Copter::FlightMode_ACRO(copter)
        { }

    bool init(bool ignore_checks) override;
    void run() override; // should be called at 100hz or more

    void get_pilot_desired_yaw_rate(int16_t yaw_in, float &yaw_out);

protected:
private:
};
#endif