#!/usr/bin/env python3
"""Turnstone Harvester — collect logs and ship them to a Turnstone instance.

Subcommands:
    push      Read sources.yaml, POST each log file to Turnstone /api/glean/upload
    incident  Tag an incident on the remote Turnstone instance

Usage:
    # Push all configured sources
    python harvester.py push --url http://turnstone:8534 --sources /patterns/sources.yaml

    # Tag an incident
    python harvester.py incident "jellyseerr went down" \\
        --url http://turnstone:8534 \\
        --started "2026-05-19 10:00" --ended "2026-05-19 10:30" \\
        --type crash --severity HIGH

Environment variables (override flags):
    TURNSTONE_URL      Base URL of the Turnstone instance
    TURNSTONE_SOURCES  Path to sources.yaml
"""
from __future__ import annotations

import argparse
import json
import logging
import sys
import urllib.error
import urllib.parse
import urllib.request
from pathlib import Path

import yaml

logging.basicConfig(level=logging.INFO, format="%(levelname)s %(message)s")
logger = logging.getLogger("harvester")


# ---------------------------------------------------------------------------
# HTTP helpers
# ---------------------------------------------------------------------------

def _post_json(url: str, payload: dict) -> dict:
    data = json.dumps(payload).encode()
    req = urllib.request.Request(
        url,
        data=data,
        headers={"Content-Type": "application/json"},
        method="POST",
    )
    with urllib.request.urlopen(req, timeout=30) as resp:
        return json.loads(resp.read())


def _post_file(url: str, path: Path, source_id: str) -> dict:
    """POST a log file as multipart/form-data."""
    boundary = "----TurnstoneHarvesterBoundary"
    body_parts: list[bytes] = []

    content = path.read_bytes()
    body_parts.append(
        f"--{boundary}\r\n"
        f'Content-Disposition: form-data; name="file"; filename="{path.name}"\r\n'
        f"Content-Type: text/plain\r\n\r\n".encode()
    )
    body_parts.append(content)
    body_parts.append(b"\r\n")
    body_parts.append(f"--{boundary}--\r\n".encode())

    body = b"".join(body_parts)
    params = urllib.parse.urlencode({"source_id": source_id})
    req = urllib.request.Request(
        f"{url}?{params}",
        data=body,
        headers={"Content-Type": f"multipart/form-data; boundary={boundary}"},
        method="POST",
    )
    with urllib.request.urlopen(req, timeout=60) as resp:
        return json.loads(resp.read())


# ---------------------------------------------------------------------------
# push subcommand
# ---------------------------------------------------------------------------

def cmd_push(args: argparse.Namespace) -> int:
    sources_path = Path(args.sources)
    if not sources_path.exists():
        logger.error("sources file not found: %s", sources_path)
        return 1

    with open(sources_path) as f:
        config = yaml.safe_load(f) or {}

    sources = config.get("sources", [])
    if not sources:
        logger.warning("No sources defined in %s", sources_path)
        return 0

    upload_url = args.url.rstrip("/") + "/turnstone/api/glean/upload"
    total_gleaned = 0
    errors = 0

    for src in sources:
        src_id = src.get("id", "unknown")
        src_path = Path(src["path"])
        if not src_path.exists():
            logger.warning("Source %r not found, skipping: %s", src_id, src_path)
            continue
        logger.info("Pushing %s (%s) ...", src_id, src_path)
        try:
            result = _post_file(upload_url, src_path, src_id)
            count = result.get("gleaned", 0)
            total_gleaned += count
            logger.info("  %s: %d entries gleaned", src_id, count)
        except urllib.error.HTTPError as exc:
            logger.error("  %s: HTTP %d — %s", src_id, exc.code, exc.read().decode(errors="replace"))
            errors += 1
        except Exception as exc:
            logger.error("  %s: %s", src_id, exc)
            errors += 1

    logger.info("Done. Total gleaned: %d entries, errors: %d", total_gleaned, errors)
    return 1 if errors else 0


# ---------------------------------------------------------------------------
# incident subcommand
# ---------------------------------------------------------------------------

def cmd_incident(args: argparse.Namespace) -> int:
    payload = {
        "label": args.label,
        "issue_type": args.type or "",
        "started_at": args.started or "",
        "ended_at": args.ended or "",
        "notes": args.notes or "",
        "severity": args.severity or "MEDIUM",
    }
    url = args.url.rstrip("/") + "/turnstone/api/incidents"
    try:
        result = _post_json(url, payload)
        logger.info("Incident created: %s", result.get("id", result))
        return 0
    except urllib.error.HTTPError as exc:
        logger.error("HTTP %d — %s", exc.code, exc.read().decode(errors="replace"))
        return 1
    except Exception as exc:
        logger.error("%s", exc)
        return 1


# ---------------------------------------------------------------------------
# CLI
# ---------------------------------------------------------------------------

def build_parser() -> argparse.ArgumentParser:
    import os

    default_url = os.environ.get("TURNSTONE_URL", "http://localhost:8534")
    default_sources = os.environ.get("TURNSTONE_SOURCES", "/patterns/sources.yaml")

    parser = argparse.ArgumentParser(
        description="Turnstone Harvester — ship logs and tag incidents",
        formatter_class=argparse.RawDescriptionHelpFormatter,
    )
    sub = parser.add_subparsers(dest="cmd", required=True)

    # push
    p_push = sub.add_parser("push", help="Push log files to Turnstone")
    p_push.add_argument("--url", default=default_url, help="Turnstone base URL (default: %(default)s)")
    p_push.add_argument("--sources", default=default_sources, help="Path to sources.yaml (default: %(default)s)")

    # incident
    p_inc = sub.add_parser("incident", help="Tag an incident on the Turnstone instance")
    p_inc.add_argument("label", help="Short description of the incident")
    p_inc.add_argument("--url", default=default_url, help="Turnstone base URL (default: %(default)s)")
    p_inc.add_argument("--started", help="Start time (ISO or natural language)")
    p_inc.add_argument("--ended", help="End time (ISO or natural language)")
    p_inc.add_argument("--type", dest="type", help="Issue type tag (e.g. crash, oom, auth_fail)")
    p_inc.add_argument("--severity", default="MEDIUM",
                       choices=["LOW", "MEDIUM", "HIGH", "CRITICAL"],
                       help="Incident severity (default: MEDIUM)")
    p_inc.add_argument("--notes", help="Additional notes")

    return parser


def main() -> int:
    parser = build_parser()
    args = parser.parse_args()
    if args.cmd == "push":
        return cmd_push(args)
    if args.cmd == "incident":
        return cmd_incident(args)
    parser.print_help()
    return 1


if __name__ == "__main__":
    sys.exit(main())