#!/usr/bin/env python3
"""publish_source_ledger.py — idempotent Gitea publication for the Source Ledger
(PROV-1, #282).

Pure projection publisher: renders the ledger from the accepted OUTWARD
artifact and posts/updates a single OUTWARD SOURCE LEDGER comment on the
issue. Idempotency: the comment is identified by a fixed marker containing
the artifact hash — re-running with the same hash UPDATES the existing
comment instead of creating duplicates.

Publication failure raises visibly (per #282 constraint: provenance
publication fails visibly, must not silently falsify the ledger). It does
NOT alter research cognition or stage outcomes — callers invoke it after
gate acceptance, and its failure does not invalidate the accepted artifact.
"""

from __future__ import annotations

import json
import os
import urllib.request

from source_ledger import build_records, render_markdown
import sys as _sys
_SCRIPT_DIR = str(__import__('pathlib').Path(__file__).resolve().parent)
if _SCRIPT_DIR not in _sys.path:
    _sys.path.insert(0, _SCRIPT_DIR)
import gitea_auth

MARKER_PREFIX = "<!-- source-ledger"


def _api(method: str, path: str, payload: dict | None = None) -> tuple[int, dict | str]:
    token = gitea_auth.get_token() if gitea_auth.has_token() else ""
    server = os.environ.get("GITEA_SERVER", "https://gitea.thingscouldgetdicey.online")
    req = urllib.request.Request(
        server + "/api/v1" + path,
        method=method,
        data=json.dumps(payload).encode() if payload else None,
        headers={"Authorization": f"token {token}", "Content-Type": "application/json"},
    )
    try:
        with urllib.request.urlopen(req, timeout=60) as r:
            body = r.read().decode()
            return r.status, (json.loads(body) if body.strip() else "")
    except urllib.error.HTTPError as e:
        return e.code, e.read().decode()[:500]


def _marker(artifact_hash: str) -> str:
    return f"{MARKER_PREFIX} hash={artifact_hash} -->"


def publish(
    issue: int, artifact_dir: str, artifact_hash: str, runner: dict | None = None, model: str | None = None
) -> dict:
    """Render + post/update the ledger comment. Returns publication result."""
    path = os.path.join(artifact_dir, "outward.json")
    with open(path) as f:
        outward = json.load(f)

    # runner/model: persisted factual fields from the artifact; UNKNOWN if absent
    runner = runner or outward.get("runner")
    model = model or outward.get("model", "UNKNOWN")

    records = build_records(outward)
    legacy = not any(
        c.get("contradicts_source_ids")
        for c in outward.get("contradictory_evidence", outward.get("contradictions", []))
        if isinstance(c, dict)
    )
    body = (
        _marker(artifact_hash)
        + "\n"
        + render_markdown(records, outward, runner, model, artifact_hash, legacy_claims=legacy)
    )

    # Find existing ledger comment for this artifact hash (idempotency)
    status, comments = _api("GET", f"/repos/conductor/rune/issues/{issue}/comments?limit=50")
    if status != 200 or not isinstance(comments, list):
        raise RuntimeError(f"SourceLedger publish: cannot list comments (HTTP {status})")
    existing = None
    for c in comments:
        if isinstance(c, dict) and c.get("body", "").startswith(_marker(artifact_hash)):
            existing = c
            break

    if existing:
        status, _ = _api("PATCH", f"/repos/conductor/rune/issues/comments/{existing['id']}", {"body": body})
        if status not in (200, 201):
            raise RuntimeError(f"SourceLedger publish: update failed (HTTP {status})")
        return {"action": "updated", "comment_id": existing["id"], "artifact_hash": artifact_hash}

    status, created = _api("POST", f"/repos/conductor/rune/issues/{issue}/comments", {"body": body})
    if status not in (200, 201):
        raise RuntimeError(f"SourceLedger publish: create failed (HTTP {status}): {created}")
    return {"action": "created", "comment_id": created.get("id"), "artifact_hash": artifact_hash}


def main_with(argv: list[str]) -> int:
    import argparse

    parser = argparse.ArgumentParser(description="Publish the OUTWARD Source Ledger")
    parser.add_argument("--issue", type=int, required=True)
    parser.add_argument("--artifact-dir", required=True)
    parser.add_argument("--artifact-hash", required=True)
    args = parser.parse_args(argv[1:])
    result = publish(args.issue, args.artifact_dir, args.artifact_hash)
    print(json.dumps(result))
    return 0


if __name__ == "__main__":
    import sys

    raise SystemExit(main_with(sys.argv))