import sys

sys.dont_write_bytecode = True

import argparse
import os
import re

import requests

sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from keycheck_common import (
    append_jsonl, classify_common_http_status, commit_status_transaction,
    default_input_file, default_proxy_file, ensure_output_files, iter_findings,
    keycheck_input_mode,
    load_checked_statuses, load_known_keys, load_proxies, mask_secret,
    read_plain_keys, record_validation_result, recover_status_transaction,
    request_error_message, require_provider_authority, service_output_dir, should_skip_key, write_keycheck_event,
)

SERVICE = "huggingface"
DETECTOR_NAMES = ["HuggingFace", "Huggingface"]
DETECTOR = "HuggingFace"
OUTPUT_DIR = os.getenv("KEYCHECK_OUTPUT_DIR") or service_output_dir(SERVICE)
INPUT_FILE = os.getenv("KEYCHECK_INPUT_FILE") or default_input_file()
PROXY_FILE = os.getenv("KEYCHECK_PROXY_FILE") or default_proxy_file()
CHECKED_FILE = os.path.join(OUTPUT_DIR, "huggingfaceChecked.txt")
RESULTS_FILE = os.path.join(OUTPUT_DIR, "huggingfaceResults.jsonl")
STATUS_FILES = {
    "VALID": os.path.join(OUTPUT_DIR, "huggingfaceAlive.txt"),
    "DEAD": os.path.join(OUTPUT_DIR, "huggingfaceDead.txt"),
    "RESTRICTED": os.path.join(OUTPUT_DIR, "huggingfaceRestricted.txt"),
    "LIMITED": os.path.join(OUTPUT_DIR, "huggingfaceLimited.txt"),
    "NETWORK": os.path.join(OUTPUT_DIR, "huggingfaceNetwork.txt"),
    "NO_CONTEXT": os.path.join(OUTPUT_DIR, "huggingfaceNoContext.txt"),
    "UNKNOWN": os.path.join(OUTPUT_DIR, "huggingfaceUnknown.txt"),
}
KEY_REGEX = re.compile(r"\bhf_[A-Za-z0-9]{20,}\b")
WHOAMI_URL = "https://huggingface.co/api/whoami-v2"


def ensure_files():
    ensure_output_files([CHECKED_FILE, RESULTS_FILE, *STATUS_FILES.values()])
    recover_status_transaction(CHECKED_FILE, STATUS_FILES)


def iter_candidate_decisions(input_file, plain_files):
    seen_plain = set()
    for item in iter_findings(input_file, DETECTOR_NAMES):
        key = item.get("credential_secret_text") or item["raw"]
        if key:
            yield key, item["source"], item["finding"], bool(KEY_REGEX.fullmatch(key))
    for item in read_plain_keys(plain_files, KEY_REGEX):
        key = item["key"]
        if key not in seen_plain:
            seen_plain.add(key)
            yield key, item["source"], {}, True


def extract_candidates(input_file, plain_files):
    for key, source, finding, valid_format in iter_candidate_decisions(input_file, plain_files):
        if valid_format:
            yield key, source, finding


def check_key(key, proxy, timeout):
    try:
        response = requests.get(WHOAMI_URL, headers={"Authorization": f"Bearer {key}"}, proxies=proxy, timeout=timeout)
    except requests.RequestException as exc:
        return {"status": "NETWORK", "message": str(exc)}
    if response.status_code == 200:
        data = response.json() if response.text else {}
        return {"status": "VALID", "message": "whoami accepted", "username": data.get("name") or data.get("fullname") or ""}
    status = "RESTRICTED" if response.status_code == 403 else classify_common_http_status(response.status_code)
    return {"status": status, "http_status": response.status_code, "message": request_error_message(response).replace(key, "***REDACTED***")}


def write_result(key, result, source, finding):
    status = result.get("status") or "UNKNOWN"
    write_keycheck_event(SERVICE, RESULTS_FILE, key, result, source, finding, DETECTOR)
    commit_status_transaction(
        CHECKED_FILE, STATUS_FILES, key, status, result.get("message", ""), source,
    )
    record_validation_result(SERVICE, key, result, source, finding, DETECTOR)


def parse_args():
    parser = argparse.ArgumentParser(description="HuggingFace key checker")
    parser.add_argument("--input", default=INPUT_FILE)
    parser.add_argument("--plain", action="append", default=[])
    parser.add_argument("--proxy-file", default=PROXY_FILE)
    parser.add_argument("--timeout", type=int, default=15)
    parser.add_argument("--max-keys", type=int, default=0)
    parser.add_argument("--retry-network", action="store_true")
    parser.add_argument("--retry-limited", action="store_true")
    parser.add_argument("--retry-unknown", action="store_true")
    parser.add_argument("--retry-restricted", action="store_true")
    parser.add_argument("--recheck-all", action="store_true")
    return parser.parse_args()


def main():
    require_provider_authority(SERVICE)
    args = parse_args()
    ensure_files()
    proxy_cycler = load_proxies(args.proxy_file)
    checked = load_checked_statuses(CHECKED_FILE)
    known = load_known_keys(CHECKED_FILE, STATUS_FILES)
    retry_statuses = set()
    if args.retry_network: retry_statuses.add("NETWORK")
    if args.retry_limited: retry_statuses.add("LIMITED")
    if args.retry_unknown: retry_statuses.update({"UNKNOWN", "NO_CONTEXT"})
    if args.retry_restricted: retry_statuses.add("RESTRICTED")
    processed = skipped = 0
    print("--- HuggingFace key checker ---")
    postgres_mode = keycheck_input_mode() == "postgres"
    for key, source, finding, valid_format in iter_candidate_decisions(args.input, args.plain):
        if not valid_format and not postgres_mode:
            skipped += 1
            continue
        if valid_format and should_skip_key(key, checked, known, args, retry_statuses, service=SERVICE, source=source, finding=finding, detector=DETECTOR):
            skipped += 1
            continue
        if args.max_keys and processed >= args.max_keys:
            break
        processed += 1
        print(f"\n[{processed}] HuggingFace candidate {mask_secret(key)} from {source}")
        result = (
            check_key(key, next(proxy_cycler) if proxy_cycler else None, args.timeout)
            if valid_format else
            {"status": "NO_CONTEXT", "message": "candidate does not match canonical Hugging Face token format"}
        )
        print(f"  STATUS: {result['status']} | {result.get('message', '')[:200]}")
        write_result(key, result, source, finding)
        known.add(key)
        checked[key] = result["status"]
    print(f"\nDone. Processed={processed}, skipped={skipped}, results={RESULTS_FILE}")


if __name__ == "__main__":
    main()