#include <pthread.h>

/* Letter type for unified message queue */
typedef enum {
  LETTER_BLOB,     /* Blob message */
  LETTER_CALLBACK  /* JSValue callback function */
} letter_type;

typedef struct letter {
  letter_type type;
  union {
    blob *blob_data;   /* For LETTER_BLOB */
    JSValue callback;  /* For LETTER_CALLBACK */
  };
} letter;

#define ACTOR_IDLE      0 // Actor not doing anything
#define ACTOR_READY     1 // Actor ready for a turn
#define ACTOR_RUNNING   2 // Actor taking a turn
#define ACTOR_EXHAUSTED 3 // Actor waiting for GC
#define ACTOR_RECLAIMING 4 // Actor running GC
#define ACTOR_SLOW      5 // Actor going slowly; deprioritize

typedef struct cell_rt {
  JSContext *context;
  JSValue idx_buffer;
  JSValue on_exception;
  JSValue message_handle;

  void *init_wota;

  /* Protects JSContext usage */
  pthread_mutex_t *mutex; /* for everything else */
  pthread_mutex_t *msg_mutex; /* For message queue and timers queue */
  
  char *id;

  int idx_count;

  /* The “mailbox” for incoming messages + a dedicated lock for it: */
  letter *letters;

  /* CHANGED FOR EVENTS: a separate lock for the actor->events queue */
  struct { uint32_t key; JSValue value; } *timers;

  int state;
  uint32_t ar;  // timer for unneeded
  double ar_secs;  // time for unneeded
  JSValue unneeded;  // fn to call before unneeded
    
  int disrupt;
  int main_thread_only;
  int affinity;
  
  JSValue actor_sym;
  
  const char *name; // human friendly name
  cell_hook trace_hook;
} cell_rt;

cell_rt *create_actor(void *wota);
const char *register_actor(const char *id, cell_rt *actor, int mainthread, double ar);
void actor_disrupt(cell_rt *actor);

JSValue actor_sym(cell_rt *actor);

const char *send_message(const char *id, void *msg);
const char *register_actor(const char *id, cell_rt *actor, int mainthread, double ar);
void actor_unneeded(cell_rt *actor, JSValue fn, double seconds);
void script_startup(cell_rt *rt);
int uncaught_exception(JSContext *js, JSValue v);
int actor_exists(const char *id);

void set_actor_state(cell_rt *actor);
void actor_clock(cell_rt *actor, JSValue fn);
uint32_t actor_delay(cell_rt *actor, JSValue fn, double seconds);
JSValue actor_remove_timer(cell_rt *actor, uint32_t timer_id);
void exit_handler(void);
int actor_interrupt_cb(JSRuntime *rt, cell_rt *crt);
void actor_loop();
void actor_initialize(void);
void actor_free(cell_rt *actor);

uint64_t cell_ns();
void cell_sleep(double seconds);
int randombytes(void *buf, size_t n);