"""Sink comun: persiste el resultado de cualquier escaneo de red en el ecosistema OSINT.

Toda funcion de scan (whois, rdap, dns, nmap, traceroute, ping) llama a esta funcion
DESPUES de ejecutarse para que el resultado quede archivado y navegable. Tiene dos capas:

1. Capa nota (SIEMPRE, fuente de verdad): escribe una nota Markdown en el vault de
   Obsidian OSINT bajo `dominios/<slug>/recon/<scan_type>-<ts>.md` con el raw del scan
   en un bloque de codigo y un frontmatter tipado. Compone create_obsidian_note del
   grupo obsidian.

2. Capa registro estructurado (best-effort): hace POST al service osint_db
   (FastAPI + DuckDB single-writer) en /api/scan para indexar el scan. Si el endpoint
   no existe todavia (404) o el service esta caido (ConnectionError), degrada a solo-nota
   con un register_warning, SIN fallar: la nota ya quedo guardada.

Funcion impura: escribe en disco y hace red. No lanza; devuelve un dict de estado.
"""

import json
import os
import re
import urllib.error
import urllib.request
from datetime import datetime

from obsidian import create_obsidian_note

# Tipos de scan reconocidos. scan_type es texto libre pero se sanea a slug seguro.
_KNOWN_SCAN_TYPES = {"whois", "rdap", "dns", "nmap", "traceroute", "ping"}

# Limite del raw embebido en la nota (caracteres). Por encima se trunca.
_RAW_MAX = 200_000


def _slugify(value: str) -> str:
    """Normaliza un texto a slug seguro: minusculas, solo [a-z0-9._-]."""
    s = re.sub(r"[^a-z0-9._-]+", "-", value.strip().lower()).strip("-")
    return s or "unknown"


def _fence(raw: str) -> str:
    """Envuelve raw en un bloque de codigo fenced, evitando colisionar con ``` interiores."""
    # Elige un cercado con suficientes backticks para que el contenido no lo cierre.
    longest = 0
    for run in re.findall(r"`+", raw):
        longest = max(longest, len(run))
    fence = "`" * max(3, longest + 1)
    return f"{fence}text\n{raw}\n{fence}"


def save_scan_to_osint(
    target: str,
    scan_type: str,
    raw: str,
    summary: dict | None = None,
    vault_dir: str = "~/Obsidian/osint",
    service_url: str = "http://127.0.0.1:8771",
    tool: str | None = None,
) -> dict:
    """Persiste un resultado de escaneo de red en el vault OSINT (nota + registro DuckDB).

    Args:
        target: objetivo del scan (dominio, host o IP). Define el slug de la carpeta.
        scan_type: tipo de scan (whois|rdap|dns|nmap|traceroute|ping); texto libre que
            se saneara a slug seguro para nombres de archivo y tags.
        raw: salida cruda del scan (texto). Se embebe en un bloque de codigo en la nota;
            si supera ~200KB se trunca dejando una marca.
        summary: dict opcional con campos resumidos del scan (registrar, ips, puertos,
            rtt, etc.). Se anade al frontmatter y se envia al registro estructurado.
        vault_dir: raiz del vault OSINT. Se expande ~ . Default ~/Obsidian/osint.
        service_url: base del service osint_db. Default http://127.0.0.1:8771.
        tool: nombre de la herramienta usada (nmap, dig, whois...). Si None, usa scan_type.

    Returns:
        dict de estado. Caso ok:
            {"status": "ok", "target": str, "slug": str, "scan_type": str,
             "note_path": str (rel al vault), "note_abs": str (ruta absoluta),
             "registered": bool, "register_warning": str | None,
             "scan_id": str | None}
        Caso error (solo si falla la escritura critica de la nota):
            {"status": "error", "error": str}
    """
    try:
        scan_type_slug = _slugify(scan_type)
        slug = _slugify(target)
        tool_name = tool or scan_type_slug

        now = datetime.now()
        ts_compact = now.strftime("%Y%m%d-%H%M")
        ts_iso = now.isoformat()

        rel_path = f"dominios/{slug}/recon/{scan_type_slug}-{ts_compact}.md"

        summary = summary if isinstance(summary, dict) else {}

        # --- Capa nota (critica) ---
        frontmatter = {
            "tipo": "scan-red",
            "scan_tipo": scan_type_slug,
            "target": target,
            "slug": slug,
            "fecha": ts_iso,
            "herramienta": tool_name,
            "tags": ["scan-red", scan_type_slug, "recon"],
        }
        if summary:
            frontmatter["summary"] = summary

        raw_body = raw if isinstance(raw, str) else str(raw)
        truncated = False
        if len(raw_body) > _RAW_MAX:
            raw_body = raw_body[:_RAW_MAX]
            truncated = True

        lines = [
            f"# {scan_type_slug} scan — {target}",
            "",
            f"- **Target:** {target}",
            f"- **Tipo:** {scan_type_slug}",
            f"- **Herramienta:** {tool_name}",
            f"- **Fecha:** {ts_iso}",
        ]
        if summary:
            lines.append("")
            lines.append("## Resumen")
            for k, v in summary.items():
                lines.append(f"- **{k}:** {v}")
        lines.append("")
        lines.append("## Salida cruda")
        lines.append("")
        lines.append(_fence(raw_body))
        if truncated:
            lines.append("")
            lines.append(
                f"> Salida truncada a {_RAW_MAX} caracteres (el original era mas largo)."
            )
        body = "\n".join(lines) + "\n"

        note_abs = create_obsidian_note(
            os.path.expanduser(vault_dir),
            rel_path,
            body=body,
            frontmatter=frontmatter,
            overwrite=True,
        )

        # --- Capa registro estructurado (best-effort) ---
        registered = False
        register_warning = None
        scan_id = None

        payload = {
            "target": target,
            "target_slug": slug,
            "scan_type": scan_type_slug,
            "tool": tool_name,
            "note_path": rel_path,
            "summary": summary,
            "scan_ts": ts_iso,
        }
        url = service_url.rstrip("/") + "/api/scan"
        try:
            data = json.dumps(payload).encode("utf-8")
            req = urllib.request.Request(
                url,
                data=data,
                headers={"Content-Type": "application/json"},
                method="POST",
            )
            with urllib.request.urlopen(req, timeout=5) as resp:
                registered = True
                try:
                    raw_resp = resp.read().decode("utf-8")
                    parsed = json.loads(raw_resp) if raw_resp else {}
                    if isinstance(parsed, dict) and parsed.get("id") is not None:
                        scan_id = str(parsed["id"])
                except (ValueError, UnicodeDecodeError):
                    # 2xx sin body JSON: cuenta como registrado igualmente.
                    pass
        except urllib.error.HTTPError as e:
            register_warning = f"HTTP {e.code} desde {url}: {e.reason}"
        except urllib.error.URLError as e:
            register_warning = f"service osint_db inaccesible en {url}: {e.reason}"
        except Exception as e:  # noqa: BLE001 - degradacion: red nunca rompe la nota
            register_warning = f"registro fallido: {type(e).__name__}: {e}"

        return {
            "status": "ok",
            "target": target,
            "slug": slug,
            "scan_type": scan_type_slug,
            "note_path": rel_path,
            "note_abs": note_abs,
            "registered": registered,
            "register_warning": register_warning,
            "scan_id": scan_id,
        }
    except Exception as e:  # noqa: BLE001 - contrato: nunca lanzar
        return {"status": "error", "error": f"{type(e).__name__}: {e}"}


if __name__ == "__main__":
    import tempfile

    tmp_vault = tempfile.mkdtemp()
    # service_url apunta a un puerto muerto para ejercitar la degradacion graceful.
    result = save_scan_to_osint(
        "example.com",
        "whois",
        "Domain: EXAMPLE.COM\nRegistrar: X",
        summary={"registrar": "X"},
        vault_dir=tmp_vault,
        service_url="http://127.0.0.1:1",
    )

    assert result["status"] == "ok", result
    assert result["slug"] == "example.com", result
    assert result["scan_type"] == "whois", result
    assert result["note_path"] == result["note_path"], result
    assert os.path.isfile(result["note_abs"]), result
    assert result["registered"] is False, result
    assert result["register_warning"], result
    assert result["scan_id"] is None, result

    content = open(result["note_abs"], encoding="utf-8").read()
    assert "Registrar: X" in content, content
    assert "scan-red" in content, content

    print("save_scan_to_osint smoke OK")
    print(f"  note_path: {result['note_path']}")
    print(f"  note_abs:  {result['note_abs']}")
    print(f"  registered: {result['registered']}")
    print(f"  register_warning: {result['register_warning']}")