"""Fail-closed checks for a public Git/Zenodo release candidate."""

from __future__ import annotations

import hashlib
import json
from pathlib import Path
import re
import subprocess


ROOT = Path(__file__).resolve().parents[1]
CANONICAL_PDF = "output/pdf/dissecting_repository_scale_code_agent_harnesses.pdf"
CANONICAL_DOI = "10.5281/zenodo.21781711"
REQUIRED = {
    ".gitignore",
    ".zenodo.json",
    "CITATION.cff",
    "LICENSE",
    "LICENSE-DATA",
    "README.md",
    "README_ZENODO.md",
    "REPRODUCING.md",
    "THIRD_PARTY_NOTICES.md",
    "paper/main.tex",
    "paper/references.bib",
    CANONICAL_PDF,
    "output/pdf/SHA256SUMS",
}
SECRET_PATTERNS = {
    "private key": re.compile(r"-----BEGIN (?:RSA |EC |OPENSSH )?PRIVATE KEY-----"),
    "OpenAI-style key": re.compile(r"\bsk-[A-Za-z0-9_-]{20,}\b"),
    "GitHub token": re.compile(r"\b(?:gh[pousr]_[A-Za-z0-9]{20,}|github_pat_[A-Za-z0-9_]{20,})\b"),
    "AWS access key": re.compile(r"\bAKIA[0-9A-Z]{16}\b"),
}
PORTABLE_SUFFIXES = {".py", ".toml", ".md", ".tex", ".bib", ".txt", ".lock"}
PROVENANCE_PREFIXES = (
    "results/",
    "tasks/patches/",
    "tasks/selection/",
    "tasks/validation/",
)


def sha256(path: Path) -> str:
    return hashlib.sha256(path.read_bytes()).hexdigest()


def candidate_files() -> list[str]:
    result = subprocess.run(
        ["git", "ls-files", "--cached", "--others", "--exclude-standard"],
        cwd=ROOT,
        check=True,
        capture_output=True,
        text=True,
    )
    return sorted(set(result.stdout.splitlines()))


def audit() -> dict[str, object]:
    errors: list[str] = []
    files = candidate_files()
    missing = sorted(path for path in REQUIRED if not (ROOT / path).is_file())
    if missing:
        errors.append(f"missing required release files: {missing}")

    pdfs = sorted(
        path for path in files
        if path.startswith("output/pdf/")
        and path.endswith(".pdf")
        and (ROOT / path).is_file()
    )
    if pdfs != [CANONICAL_PDF]:
        errors.append(f"expected exactly one canonical PDF, found: {pdfs}")

    oversized = []
    for relative in files:
        path = ROOT / relative
        if path.is_file() and path.stat().st_size > 10 * 1024 * 1024:
            oversized.append((relative, path.stat().st_size))
    if oversized:
        errors.append(f"files larger than 10 MiB require explicit release handling: {oversized}")

    forbidden_outputs = [
        path for path in files
        if path.startswith(("results/raw/", "indexes/", "data/repos/"))
        and not path.endswith(".gitkeep")
    ]
    if forbidden_outputs:
        errors.append(f"heavy local artifacts are tracked: {forbidden_outputs}")

    secret_hits: list[str] = []
    portability_hits: list[str] = []
    for relative in files:
        path = ROOT / relative
        if not path.is_file() or path.stat().st_size > 10 * 1024 * 1024:
            continue
        try:
            text = path.read_text(encoding="utf-8")
        except UnicodeDecodeError:
            continue
        for label, pattern in SECRET_PATTERNS.items():
            if pattern.search(text):
                secret_hits.append(f"{relative}: {label}")
        if (
            path.suffix in PORTABLE_SUFFIXES
            and not relative.startswith(PROVENANCE_PREFIXES)
            and re.search(r"/(?:Users|home)/[^/\s]+/", text)
        ):
            portability_hits.append(relative)
    if secret_hits:
        errors.append(f"possible credentials detected: {secret_hits}")
    if portability_hits:
        errors.append(f"machine-specific paths in executable/public text: {portability_hits}")

    zenodo_path = ROOT / ".zenodo.json"
    if zenodo_path.is_file():
        metadata = json.loads(zenodo_path.read_text(encoding="utf-8"))
        for key in ("title", "upload_type", "publication_type", "creators", "license"):
            if not metadata.get(key):
                errors.append(f".zenodo.json missing {key}")
        if metadata.get("license") != "cc-by-4.0":
            errors.append("Zenodo content license must be cc-by-4.0")

    doi_files = (
        "README.md",
        "README_ZENODO.md",
        "CITATION.cff",
        ".zenodo.json",
        "paper/main.tex",
    )
    missing_doi = [
        relative for relative in doi_files
        if not (ROOT / relative).is_file()
        or CANONICAL_DOI not in (ROOT / relative).read_text(encoding="utf-8")
    ]
    if missing_doi:
        errors.append(f"canonical DOI missing from release metadata: {missing_doi}")

    checksum_path = ROOT / "output/pdf/SHA256SUMS"
    pdf_path = ROOT / CANONICAL_PDF
    if checksum_path.is_file() and pdf_path.is_file():
        expected_line = f"{sha256(pdf_path)}  {pdf_path.name}"
        lines = [line.strip() for line in checksum_path.read_text().splitlines() if line.strip()]
        if lines != [expected_line]:
            errors.append("output/pdf/SHA256SUMS is stale or contains a noncanonical PDF")

    return {
        "status": "pass" if not errors else "fail",
        "files_checked": len(files),
        "canonical_pdf": CANONICAL_PDF,
        "errors": errors,
    }


def main() -> None:
    result = audit()
    print(json.dumps(result, indent=2, sort_keys=True))
    if result["status"] != "pass":
        raise SystemExit(1)


if __name__ == "__main__":
    main()