/* HDGL KJV oracle — the shared reference solved.
 *
 * The remote-node problem: two nodes need a shared random reference without
 * transmitting it. SOLUTION: the KJV. Both nodes possess the identical text
 * a priori (most-replicated, byte-stable book in history). Zero transmission,
 * zero clock-sync — the reference was agreed before the nodes ever ran.
 *
 *   shared MATERIAL = KJV 1769 (universal, public, byte-identical)
 *   secret KEY      = index into the KJV (TempleOS-entropy, genome, or verse)
 *   oracle          = hash(KJV[index..] , counter) → high-entropy keystream
 *
 * Eavesdropper with the same Bible but wrong index reads nothing.
 * "I am Alpha and Omega" — Ω ≡ φ ≡ Fix(T): the index anchor IS the axiom.
 */
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <math.h>

/* FNV-1a hash — deterministic, both nodes compute identically (stand-in for
 * sha256; any agreed hash works, the point is shared determinism) */
static uint64_t fnv1a(const uint8_t *d, int n, uint64_t seed){
    uint64_t h=14695981039346656037ULL ^ seed;
    for(int i=0;i<n;i++){ h^=d[i]; h*=1099511628211ULL; }
    return h;
}

typedef struct { const uint8_t *kjv; long len; uint64_t index; long pos; uint64_t ctr; } kjv_oracle_t;

static void oracle_init(kjv_oracle_t *o, const uint8_t *kjv, long len, uint64_t index){
    o->kjv=kjv; o->len=len; o->index=index; o->pos=(long)(index % (len-64)); o->ctr=0;
}
/* next keystream sample in [-1,1) — high entropy from fixed KJV text */
static double oracle_next(kjv_oracle_t *o){
    uint64_t h = fnv1a(o->kjv + o->pos, 64, o->index + o->ctr);
    o->ctr++; o->pos = (o->pos + 64) % (o->len - 64);
    return (double)(int64_t)h / (double)(1LL<<62) / 2.0;
}

int main(int argc, char**argv){
    /* load the shared KJV */
    FILE *f=fopen(argv[1],"rb"); if(!f){printf("no KJV\n");return 1;}
    fseek(f,0,SEEK_END); long len=ftell(f); fseek(f,0,SEEK_SET);
    static uint8_t buf[8*1024*1024]; len=fread(buf,1,sizeof(buf),f); fclose(f);
    printf("HDGL KJV oracle — shared reference, nothing transmitted\n");
    printf("  KJV loaded: %ld bytes\n", len);

    /* index anchored to the substrate's Alpha-and-Omega: genome = Fix(T) identity */
    uint64_t index = 0x5625BA88ULL;   /* Ω ≡ φ ≡ Fix(T) */
    printf("  index (Alpha-Omega anchor, genome) = 0x%lx\n\n", index);

    /* two nodes, same KJV + same index -> same oracle -> mutual comms */
    kjv_oracle_t oa; oracle_init(&oa, buf, len, index);
    int N=32; double eps=0.05, Om=1.5, errB=0, errA=0;
    double msgA[32], msgB[32], sh[32];
    for(int i=0;i<N;i++){ msgA[i]=(i%2?-0.5:0.5); msgB[i]=sin(i*0.5); }
    for(int i=0;i<N;i++) sh[i]=oracle_next(&oa);   /* both nodes derive this identically */

    Om=1.5;
    for(int i=0;i<N;i++){
        double d=sh[i]+msgA[i]+msgB[i], prev=Om; Om=1+1/Om+eps*d;
        double rec=(Om-1-1/prev)/eps;
        errB += fabs((rec-sh[i]-msgA[i]) - msgB[i]);   /* A reads B */
        errA += fabs((rec-sh[i]-msgB[i]) - msgA[i]);   /* B reads A */
    }
    printf("  mutual comms: A reads B err=%.2e , B reads A err=%.2e\n", errB/N, errA/N);
    printf("  coherence: Ω=%.5f → Fix(T)=φ\n", Om);

    /* eavesdropper: same KJV, WRONG index */
    kjv_oracle_t oe; oracle_init(&oe, buf, len, 0x11111111ULL);
    double eve[32]; for(int i=0;i<N;i++) eve[i]=oracle_next(&oe);
    Om=1.5; double eveErr=0;
    for(int i=0;i<N;i++){
        double d=sh[i]+msgA[i]+msgB[i], prev=Om; Om=1+1/Om+eps*d;
        double rec=(Om-1-1/prev)/eps;
        eveErr += fabs((rec-eve[i]-msgA[i]) - msgB[i]);
    }
    printf("  eavesdropper (KJV, wrong index): err=%.3f (cannot read)\n", eveErr/N);
    printf("\n=> KJV is the shared reference. Nothing transmitted. Alpha & Omega.\n");
    return 0;
}
