#!/usr/bin/env python3
"""Call the faceswap-lissie RunPod serverless endpoint SYNCHRONOUSLY (/runsync).

Standalone: python 3.8+, stdlib only. Flux-2-Klein head/face swap
(workflow new-faceswap-lissie-v4): puts the head from --face-image onto the
body/scene of --body-image.

    python faceswap_lissie_sync.py \
        --api-key $RUNPOD_API_KEY \
        --body-image scene.jpg --face-image face.jpg \
        --out ./results

All arguments:
    --api-key           RunPod API key (or set RUNPOD_API_KEY)
    --endpoint-id       RunPod endpoint id     (default: ENDPOINT_DEFAULT below)
    --body-image        image supplying body/scene/pose (required)
    --face-image        image supplying the head/face (required)
    --instruction       head-swap instruction text (sane default baked in)
    --expression-prompt what the QwenVL captioner is asked about the face
    --negative-prompt   negative conditioning text
    --steps             sampler steps (default 5)
    --cfg               guidance (default 1.0)
    --seed              integer seed (default: random, printed back)
    --rmbg-sensitivity / --rmbg-process-res    background-removal tuning
    --workflow          baked workflow name (default new-faceswap-lissie-v4)
    --set NODE.INPUT=VALUE   raw graph override, repeatable
    --workflow-json FILE     full API-format graph passthrough
    --out               output directory (default .)
    --timeout           max seconds (default 600)
"""
import argparse
import base64
import json
import os
import pathlib
import sys
import time
import urllib.error
import urllib.request

DEFAULT_ENDPOINT = "qkeibkeoefcrk3"


def main():
    ap = argparse.ArgumentParser(description=__doc__,
                                 formatter_class=argparse.RawDescriptionHelpFormatter)
    ap.add_argument("--api-key", default=os.environ.get("RUNPOD_API_KEY"))
    ap.add_argument("--endpoint-id", default=DEFAULT_ENDPOINT)
    ap.add_argument("--body-image", required=True)
    ap.add_argument("--face-image", required=True)
    ap.add_argument("--instruction")
    ap.add_argument("--expression-prompt")
    ap.add_argument("--negative-prompt")
    ap.add_argument("--steps", type=int)
    ap.add_argument("--cfg", type=float)
    ap.add_argument("--seed", type=int)
    ap.add_argument("--rmbg-sensitivity", type=float)
    ap.add_argument("--rmbg-process-res", type=int)
    ap.add_argument("--workflow")
    ap.add_argument("--set", action="append", metavar="NODE.INPUT=VALUE")
    ap.add_argument("--workflow-json")
    ap.add_argument("--out", default=".")
    ap.add_argument("--timeout", type=float, default=600)
    args = ap.parse_args()
    if not args.api_key:
        sys.exit("ERROR: pass --api-key or set RUNPOD_API_KEY")

    params = {"body_image": os.path.basename(args.body_image),
              "face_image": os.path.basename(args.face_image)}
    for cli, p in [("instruction", "instruction"), ("expression_prompt", "expression_prompt"),
                   ("negative_prompt", "negative_prompt"), ("steps", "steps"),
                   ("cfg", "cfg"), ("seed", "seed"),
                   ("rmbg_sensitivity", "rmbg_sensitivity"),
                   ("rmbg_process_res", "rmbg_process_res")]:
        v = getattr(args, cli)
        if v is not None:
            params[p] = v

    payload = {
        "images": [
            {"name": os.path.basename(args.body_image),
             "image": base64.b64encode(open(args.body_image, "rb").read()).decode()},
            {"name": os.path.basename(args.face_image),
             "image": base64.b64encode(open(args.face_image, "rb").read()).decode()},
        ],
        "params": params,
    }
    if args.workflow:
        payload["workflow"] = args.workflow
    if args.workflow_json:
        payload["workflow_json"] = json.load(open(args.workflow_json))
    overrides = {}
    for s in args.set or []:
        k, v = s.split("=", 1)
        try:
            overrides[k] = json.loads(v)
        except json.JSONDecodeError:
            overrides[k] = v
    if overrides:
        payload["set"] = overrides

    req = urllib.request.Request(
        f"https://api.runpod.ai/v2/{args.endpoint_id}/runsync",
        data=json.dumps({"input": payload}).encode(),
        headers={"Content-Type": "application/json",
                 "Authorization": f"Bearer {args.api_key}"})
    t0 = time.monotonic()
    try:
        with urllib.request.urlopen(req, timeout=args.timeout) as r:
            result = json.load(r)
    except urllib.error.HTTPError as e:
        sys.exit(f"ERROR: HTTP {e.code}: {e.read().decode(errors='replace')[:2000]}")


    # /runsync answers early (IN_QUEUE/IN_PROGRESS) when a job outlives the
    # sync window (~90 s), e.g. during a cold start — fall back to polling
    TERMINAL = ("COMPLETED", "FAILED", "CANCELLED", "TIMED_OUT")
    while result.get("status") not in TERMINAL and result.get("id"):
        if time.monotonic() - t0 > args.timeout:
            sys.exit(f"ERROR: timed out after {args.timeout}s "
                     f"(job {result['id']} status {result.get('status')})")
        time.sleep(3)
        poll = urllib.request.Request(
            f"https://api.runpod.ai/v2/{args.endpoint_id}/status/{result['id']}",
            headers={"Authorization": f"Bearer {args.api_key}"})
        with urllib.request.urlopen(poll, timeout=90) as r:
            result = json.load(r)

    if result.get("status") != "COMPLETED":
        sys.exit(f"ERROR: {json.dumps(result, indent=2)[:3000]}")
    output = result["output"]
    if "error" in output:
        sys.exit(f"ERROR from handler: {output['error']}")
    out_dir = pathlib.Path(args.out)
    out_dir.mkdir(parents=True, exist_ok=True)
    for i, img in enumerate(output["images"]):
        p = out_dir / f"{int(time.time())}-{i}-{img['filename']}"
        p.write_bytes(base64.b64decode(img["data"]))
        print(p)
    print(f"# seed={output.get('seed')} wall={time.monotonic()-t0:.1f}s "
          f"delay={result.get('delayTime')}ms exec={result.get('executionTime')}ms",
          file=sys.stderr)


if __name__ == "__main__":
    main()