#ifndef ORBITAL_OBJECTS_H
#define ORBITAL_OBJECTS_H

#include "physics.h"
#include "orbital_mechanics.h"

// Forward declarations
struct SimulationState;

// ============================================================================
// Rendezvous Types
// ============================================================================

enum RendezvousState {
    RENDEZVOUS_NONE,
    RENDEZVOUS_PLANNING,
    RENDEZVOUS_APPROACHING,
    RENDEZVOUS_MATCHING,
    RENDEZVOUS_COMPLETE,
    RENDEZVOUS_FAILED
};

struct RendezvousTarget {  // Active rendezvous target configuration
    int target_index;           // Index of target spacecraft/body
    RendezvousState state;      // Current rendezvous state
    double approach_distance;   // Distance to start approach phase (m)
    double capture_distance;    // Distance for capture (m)
    double max_relative_velocity; // Max closing speed for capture (m/s)
    double cw_linearization_time; // Last time CW equations were linearized (s)
    bool is_spacecraft_target;  // True if target is spacecraft, false if body
};

// ============================================================================
// Celestial Body Structure

struct CelestialBody {  // Gravitational body in the simulation
    char name[64];
    double mass;              // kg
    double radius;            // meters
    int parent_index;         // index of gravitational parent (-1 for root body like Sun)
    float color[3];           // RGB color for rendering

    // Orbital elements from config (Keplerian elements)
    OrbitalElements orbit;

    // Global frame (from origin)
    Vec3 global_position;    // meters from origin
    Vec3 global_velocity;    // m/s

    // Local frame (relative to parent)
    Vec3 local_position;      // meters from parent
    Vec3 local_velocity;      // m/s relative to parent

    double soi_radius;        // sphere of influence radius (meters)
};

struct Spacecraft {  // Spacecraft or probe in the simulation
    char name[64];
    double mass;
    int parent_index;

    // Orbital elements from config
    OrbitalElements orbit;

    // Global frame (from origin)
    Vec3 global_position;
    Vec3 global_velocity;

    // Local frame (relative to parent)
    Vec3 local_position;
    Vec3 local_velocity;

    // Rendezvous support
    RendezvousTarget rendezvous_target;  // Active rendezvous target (if any)
};

#endif // ORBITAL_OBJECTS_H