import json, os, shutil, subprocess, time
ROOT="/Users/oscar/.worktree/hot-reload/labs/hot-reload"; REC=f"{ROOT}/target/kan-hot/debug/rustc"
DEPS=f"{ROOT}/target/debug/deps"; SRC=f"{ROOT}/api-common/src/lib.rs"
BASE="/private/var/folders/ft/fkt3bwqd01g7f54wvyz9wgjc0000gn/T/opencode/pipe/out14"
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
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 common_cmd(outdir,mark,ldir=None):
    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]=outdir
    if ldir:
        for k,a in enumerate(ca):
            if a.startswith("-L"): ca[k]=f"-Ldependency={ldir}"
    return ca
def api_cmd(outdir,inc,rmeta,ldir=None):
    raw=[api["argv"][0]]+[a if not a.startswith("--extern=api_common=") else f"--extern=api_common={rmeta}" for a in api["argv"][1:]]
    aa=[api["argv"][0]]+strip_owned(raw)+["-C","debuginfo=0","-C","codegen-units=8","-C",f"incremental={inc}"]
    j=aa.index("--out-dir"); aa[j+1]=outdir
    if ldir:
        for k,a in enumerate(aa):
            if a.startswith("-L"): aa[k]=f"-Ldependency={ldir}"
    return aa
# copy deps for ldir test
COPY=f"{BASE}/deps_copy"
def measure(name,outdir,ldir=None,iters=4):
    os.makedirs(outdir,exist_ok=True)
    inc=f"{BASE}/inc_{name}"
    print("===",name,"out",outdir,"ldir",ldir)
    for i in range(iters):
        ca=common_cmd(outdir,f"e14-{name}-{i}",ldir)
        s=time.monotonic(); pc=subprocess.run(ca,cwd=common["cwd"],env=dict(common["env"]),stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL); tc=(time.monotonic()-s)*1000
        rmeta=os.path.join(outdir,[f for f in os.listdir(outdir) if f.startswith("libapi_common") and f.endswith(".rmeta")][0])
        aa=api_cmd(outdir,inc,rmeta,ldir)
        s=time.monotonic(); pa=subprocess.run(aa,cwd=api["cwd"],env=dict(api["env"]),stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL); ta=(time.monotonic()-s)*1000
        print(f" {i}: common={tc:.1f} api={ta:.1f} rc={pc.returncode}/{pa.returncode}")
        time.sleep(.15)
try:
    # B: fresh dir with dummy files
    dummy=f"{BASE}/dummy"
    os.makedirs(dummy,exist_ok=True)
    for i in range(944): open(os.path.join(dummy,f"dummy-{i}.rlib"),"wb").write(b"x"*100)
    measure("dummy",dummy)
    # A: out-dir deps but -L to a copy
    measure("deps_ldircopy",DEPS,ldir=COPY)
finally:
    open(SRC,"w").write(orig)