import json, os, shutil, subprocess, time, glob
ROOT="/Users/oscar/.worktree/hot-reload/labs/hot-reload"; REC=f"{ROOT}/target/kan-hot/debug/rustc"
SRC=f"{ROOT}/api-common/src/lib.rs"; BASE="/private/var/folders/ft/fkt3bwqd01g7f54wvyz9wgjc0000gn/T/opencode/pipe/out31"
def load(n): return json.load(open(f"{REC}/{n}.json"))
def strip_owned(argv):
    out=[]; i=1
    while i<len(argv):
        a=argv[i]
        if a=="-C" and i+1<len(argv) and any(argv[i+1].startswith(p) for p in ("incremental=","codegen-units=","debuginfo=")): i+=2; continue
        if a.startswith("-C") and any(a[2:].startswith(p) for p in ("incremental=","codegen-units=","debuginfo=")): i+=1; continue
        out.append(a); i+=1
    return out
def rewrite_extern(argv,name,path):
    out=[]; i=0
    while i<len(argv):
        a=argv[i]
        if a=="--extern" and i+1<len(argv) and argv[i+1].startswith(name+"="):
            out+=["--extern",f"{name}={path}"]; i+=2; continue
        if a.startswith(f"--extern={name}="):
            out.append(f"--extern={name}={path}"); i+=1; continue
        out.append(a); i+=1
    return out
common=load("api_common"); api=load("api"); orig=open(SRC).read(); assert "nested-v1" in orig
shutil.rmtree(BASE,ignore_errors=True); os.makedirs(BASE)
def trial(v,i):
    name,kind=v
    d=f"{BASE}/{name}"; os.makedirs(d,exist_ok=True)
    mark=f"e31-{name}-{i}"
    open(SRC,"w").write(orig.replace("nested-v1",mark))
    ca=[common["argv"][0]]+strip_owned(common["argv"])+["-C","debuginfo=0","-C","codegen-units=1"]
    j=ca.index("--out-dir"); ca[j+1]=d
    subprocess.run(ca,cwd=common["cwd"],env=dict(common["env"]),stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL)
    ext=".rmeta" if kind=="rmeta" else ".rlib"
    art=os.path.join(d,[f for f in os.listdir(d) if f.startswith("libapi_common") and f.endswith(ext)][0])
    aa=rewrite_extern([api["argv"][0]]+strip_owned(api["argv"]),"api_common",art)
    aa+=["-C","debuginfo=0","-C","codegen-units=8","-C",f"incremental={BASE}/inc/{name}"]
    j=aa.index("--out-dir"); aa[j+1]=d
    s=time.monotonic(); p=subprocess.run(aa,cwd=api["cwd"],env=dict(api["env"]),stdout=subprocess.DEVNULL,stderr=subprocess.PIPE); t=(time.monotonic()-s)*1000
    mok=any(mark.encode() in open(f,"rb").read() for f in glob.glob(os.path.join(d,"libapi-*.rlib")))
    return t,p.returncode,mok
variants=[("rmeta","rmeta"),("rlib","rlib")]
try:
    for v in variants: trial(v,99)
    time.sleep(.2)
    res={v[0]:[] for v in variants}; bad={}
    for i in range(20):
        for v in variants:
            t,rc,mok=trial(v,i); res[v[0]].append(t)
            if rc or not mok: bad.setdefault(v[0],[]).append((rc,mok))
    for k,xs in res.items():
        s=sorted(xs); print(f"{k:6s} med={s[len(s)//2]:.1f} mean={sum(xs)/len(xs):.1f} all={[round(x,1) for x in xs]} bad={bad.get(k)}")
finally:
    open(SRC,"w").write(orig)