#!/usr/bin/env python3
"""Ingest tpsc.yaml service dependency declarations into the State Hub.

Usage:
    uv run python scripts/ingest_tpsc.py --repo <slug> [--dry-run]
    uv run python scripts/ingest_tpsc.py --all [--dry-run]
"""
import argparse
import json
import sys
import urllib.error
import urllib.request
from pathlib import Path

try:
    import yaml
except ImportError:
    import tomllib as _t  # noqa — fallback not really viable; yaml is required
    yaml = None

API_BASE = "http://127.0.0.1:8000"
TPSC_FILENAME = "tpsc.yaml"


def _get(path: str) -> dict | list:
    req = urllib.request.Request(f"{API_BASE}{path}", headers={"Accept": "application/json"})
    with urllib.request.urlopen(req) as r:
        return json.loads(r.read())


def _post(path: str, payload: dict) -> dict:
    data = json.dumps(payload).encode()
    req = urllib.request.Request(
        f"{API_BASE}{path}/",
        data=data,
        headers={"Content-Type": "application/json"},
        method="POST",
    )
    try:
        with urllib.request.urlopen(req) as r:
            return json.loads(r.read())
    except urllib.error.HTTPError as e:
        body = e.read().decode()
        print(f"  ERROR {e.code}: {body}", file=sys.stderr)
        raise


def _load_yaml(path: Path) -> dict:
    if yaml is None:
        raise RuntimeError("PyYAML is required: uv add pyyaml")
    with open(path) as f:
        return yaml.safe_load(f) or {}


def _resolve_repo_path(repo: dict) -> str:
    import socket
    hostname = socket.gethostname()
    host_paths = repo.get("host_paths") or {}
    candidates = []
    if host_paths.get(hostname):
        candidates.append(host_paths[hostname])
    if repo.get("local_path"):
        candidates.append(repo["local_path"])
    for raw in candidates:
        p = Path(raw).expanduser()
        if p.is_dir():
            return str(p)
    return ""


def ingest_repo(slug: str, dry_run: bool = False) -> bool:
    try:
        repo = _get(f"/repos/{slug}")
    except Exception as e:
        print(f"  ✗ Repo '{slug}' not found: {e}", file=sys.stderr)
        return False

    if isinstance(repo, dict) and repo.get("error"):
        print(f"  ✗ {repo['error']}", file=sys.stderr)
        return False

    repo_path = _resolve_repo_path(repo)
    if not repo_path:
        print(f"  ✗ No accessible local path for '{slug}' on this host.", file=sys.stderr)
        return False

    tpsc_file = Path(repo_path) / TPSC_FILENAME
    if not tpsc_file.exists():
        print(f"  — '{slug}': no {TPSC_FILENAME} found, skipping.")
        return True

    data = _load_yaml(tpsc_file)
    services = data.get("services", [])
    if not services:
        print(f"  — '{slug}': {TPSC_FILENAME} has no services entries, skipping.")
        return True

    entries = [
        {
            "service_slug": svc.get("slug", ""),
            "purpose": svc.get("purpose"),
            "auth_type": svc.get("auth"),
            "endpoint_override": svc.get("endpoint"),
            "notes": svc.get("notes"),
        }
        for svc in services
        if svc.get("slug")
    ]

    print(f"  {'[dry-run] ' if dry_run else ''}'{slug}': {len(entries)} service(s) from {TPSC_FILENAME}")
    for e in entries:
        print(f"    • {e['service_slug']} ({e.get('auth_type', '?')}) — {e.get('purpose', '')}")

    if dry_run:
        return True

    result = _post("/tpsc/ingest", {
        "repo_slug": slug,
        "source_file": TPSC_FILENAME,
        "entries": entries,
    })
    print(f"  ✓ Snapshot {result['id'][:8]}… ingested {result['entry_count']} entries")
    return True


def main() -> None:
    parser = argparse.ArgumentParser(description="Ingest tpsc.yaml into State Hub")
    group = parser.add_mutually_exclusive_group(required=True)
    group.add_argument("--repo", metavar="SLUG", help="Single repo slug")
    group.add_argument("--all", action="store_true", help="All registered repos")
    parser.add_argument("--dry-run", action="store_true", help="Parse only, do not POST")
    args = parser.parse_args()

    if args.all:
        repos = _get("/repos/")
        slugs = [r["slug"] for r in repos]
    else:
        slugs = [args.repo]

    ok = all(ingest_repo(slug, dry_run=args.dry_run) for slug in slugs)
    sys.exit(0 if ok else 1)


if __name__ == "__main__":
    main()