"""Fixtures comunes para tests de enrichers de graph_explorer.

Cada test recibe:
  - `ops_db`: path a una operations.db con schema minimo en tmp dir
  - `app_dir`: tmp dir que actua como app_dir (cache_dir = <app_dir>/cache)
  - `registry_root`: ruta absoluta del registry (para imports en run.py)
  - `run_enricher(enricher, ctx_overrides)`: helper que invoca run.py via
    subprocess con el mismo wire protocol que jobs.cpp.

El schema se replica de `fn_operations/project_template/operations.db` —
solo las columnas que usan los enrichers. Si fn_operations cambia el
schema, este conftest se actualiza.
"""
from __future__ import annotations

import json
import os
import sqlite3
import subprocess
import sys
from pathlib import Path

import pytest


APP_DIR_SRC   = Path(__file__).resolve().parents[1]   # graph_explorer/
TESTS_DIR     = Path(__file__).resolve().parent
STUBS_DIR     = TESTS_DIR / "_stubs"

# Los enrichers viven en `<app>/enrichers/` en el repo dev y en
# `<app>/assets/enrichers/` en la carpeta portable de Windows
# (convencion `assets/` desde el ADR de feb-2026). Detectar cual
# existe y usar ese.
def _resolve_enrichers_dir() -> Path:
    cands = [
        APP_DIR_SRC / "enrichers",
        APP_DIR_SRC / "assets" / "enrichers",
    ]
    for c in cands:
        if c.is_dir():
            return c
    # Default a la primera para mensajes de error consistentes con el dev layout.
    return cands[0]


ENRICHERS_DIR = _resolve_enrichers_dir()


def _resolve_registry_root() -> Path:
    """Sube desde el directorio de tests buscando un marker del registry.

    En el repo: APP_DIR/projects/osint_graph/apps/graph_explorer/tests
    -> 5 niveles arriba esta fn_registry/. En la carpeta de Windows
    (Desktop/apps/graph_explorer/tests) NO hay registry — usamos el
    propio app dir como fallback. Los tests no leen registry.db; solo
    se pasa registry_root via ctx por compatibilidad con run.py.
    """
    # Marker fiable: fichero `cmd/fn/main.go` o `registry.db`.
    p = APP_DIR_SRC
    for _ in range(8):
        if (p / "cmd" / "fn" / "main.go").exists() or \
           (p / "registry.db").exists():
            return p
        if p.parent == p:
            break
        p = p.parent
    # Sin registry: usa el app dir como pseudo-root. Los tests funcionan
    # igual mientras no haya un test que importe paquetes del registry.
    return APP_DIR_SRC


REGISTRY_ROOT = _resolve_registry_root()


def _resolve_python_bin() -> Path:
    """Elige el Python con el que ejecutar los enrichers.

    Prioridad (cubre Linux/WSL dev y Windows portable instalado):
      1. $FN_TEST_PYTHON                                      env override
      2. <app>/assets/runtime/python/python.exe               (Windows portable, solo Windows)
      3. <app>/runtime/python/python.exe                      (legacy, solo Windows)
      4. <registry>/python/.venv/bin/python3                  (WSL dev venv)
      5. sys.executable                                       (whatever runs pytest)

    Los candidatos `python.exe` solo se aceptan si corremos en Windows
    nativo. En WSL/Linux pueden existir vendored en el repo (los
    distribuibles), pero no son ejecutables en este OS.
    """
    env = os.environ.get("FN_TEST_PYTHON")
    if env and Path(env).exists():
        return Path(env)
    is_windows = sys.platform.startswith("win")
    cands: list[Path] = []
    if is_windows:
        cands += [
            APP_DIR_SRC / "assets" / "runtime" / "python" / "python.exe",
            APP_DIR_SRC / "runtime" / "python" / "python.exe",
        ]
    cands += [REGISTRY_ROOT / "python" / ".venv" / "bin" / "python3"]
    for c in cands:
        if c.exists():
            return c
    return Path(sys.executable)


PYTHON_BIN = _resolve_python_bin()


def stub_requests(tmp_path: Path, plan: dict) -> dict:
    """Escribe el plan de respuestas y devuelve el env que activa el stub.

    Devuelve dos vias por las que `_runner.py` y un Python no-embedded
    pueden inyectar el stub:
      - `PYTHONPATH`: la ruta estandar; respeta el orden y el resto del
        entorno. Funciona en Linux y en Python full instalado (no-embed).
      - `_STUB_PATHS`: lo lee `_runner.py` y hace `sys.path.insert(0, ...)`.
        Necesario en el Python embebido de Windows, que ignora
        PYTHONPATH (lo controla `python312._pth`).
    Plan acepta `default` y/o `match` (lista de {contains, status, text}).
    """
    plan_file = tmp_path / "_stub_plan.json"
    plan_file.write_text(json.dumps(plan), encoding="utf-8")
    return {
        "PYTHONPATH": str(STUBS_DIR) + os.pathsep + os.environ.get("PYTHONPATH", ""),
        "_STUB_PATHS": str(STUBS_DIR),
        "_STUB_REQUESTS_PLAN": str(plan_file),
    }


SCHEMA_SQL = """
CREATE TABLE entities (
    id          TEXT PRIMARY KEY,
    name        TEXT NOT NULL,
    type_ref    TEXT NOT NULL,
    status      TEXT NOT NULL DEFAULT 'active',
    description TEXT NOT NULL DEFAULT '',
    domain      TEXT NOT NULL DEFAULT '',
    tags        TEXT NOT NULL DEFAULT '[]',
    source      TEXT NOT NULL,
    metadata    TEXT NOT NULL DEFAULT '{}',
    notes       TEXT NOT NULL DEFAULT '',
    group_id    TEXT,
    created_at  TEXT NOT NULL,
    updated_at  TEXT NOT NULL
);
CREATE TABLE relations (
    id          TEXT PRIMARY KEY,
    name        TEXT NOT NULL,
    from_entity TEXT NOT NULL DEFAULT '',
    to_entity   TEXT NOT NULL,
    via         TEXT NOT NULL DEFAULT '',
    description TEXT NOT NULL DEFAULT '',
    purity      TEXT NOT NULL DEFAULT '',
    direction   TEXT NOT NULL DEFAULT 'unidirectional',
    weight      REAL,
    status      TEXT NOT NULL DEFAULT 'designed',
    started_at  TEXT,
    ended_at    TEXT,
    "order"     INTEGER,
    tags        TEXT NOT NULL DEFAULT '[]',
    notes       TEXT NOT NULL DEFAULT '',
    created_at  TEXT NOT NULL,
    updated_at  TEXT NOT NULL
);
"""


@pytest.fixture
def ops_db(tmp_path):
    """operations.db vacia con schema minimo, lista para insertar nodos."""
    db = tmp_path / "operations.db"
    conn = sqlite3.connect(db)
    conn.executescript(SCHEMA_SQL)
    conn.commit()
    conn.close()
    return db


@pytest.fixture
def app_dir(tmp_path):
    """Directorio raiz de una 'app' para los enrichers (cache va dentro)."""
    d = tmp_path / "app"
    d.mkdir()
    (d / "cache").mkdir()
    return d


@pytest.fixture
def registry_root():
    return REGISTRY_ROOT


def make_node(ops_db: Path, *, node_id: str, name: str, type_ref: str,
              metadata: dict | None = None, source: str = "test") -> None:
    """Inserta un nodo de tipo arbitrario en operations.db."""
    conn = sqlite3.connect(ops_db)
    conn.execute(
        "INSERT INTO entities (id, name, type_ref, source, metadata, "
        " created_at, updated_at) VALUES (?, ?, ?, ?, ?, "
        " '2026-01-01T00:00:00Z', '2026-01-01T00:00:00Z')",
        (node_id, name, type_ref, source,
         json.dumps(metadata or {}, ensure_ascii=False)),
    )
    conn.commit()
    conn.close()


def get_entity(ops_db: Path, entity_id: str) -> dict | None:
    conn = sqlite3.connect(ops_db)
    try:
        cur = conn.execute(
            "SELECT id, name, type_ref, source, metadata "
            "FROM entities WHERE id=?", (entity_id,))
        row = cur.fetchone()
    finally:
        conn.close()
    if not row:
        return None
    md = {}
    try:
        md = json.loads(row[4]) if row[4] else {}
    except Exception:
        pass
    return {"id": row[0], "name": row[1], "type_ref": row[2],
            "source": row[3], "metadata": md}


def list_entities(ops_db: Path, type_ref: str | None = None) -> list[dict]:
    conn = sqlite3.connect(ops_db)
    try:
        if type_ref:
            cur = conn.execute(
                "SELECT id, name, type_ref, source, metadata, group_id "
                "FROM entities WHERE type_ref=? ORDER BY id", (type_ref,))
        else:
            cur = conn.execute(
                "SELECT id, name, type_ref, source, metadata, group_id "
                "FROM entities ORDER BY id")
        rows = cur.fetchall()
    finally:
        conn.close()
    out = []
    for r in rows:
        try:
            md = json.loads(r[4]) if r[4] else {}
        except Exception:
            md = {}
        out.append({"id": r[0], "name": r[1], "type_ref": r[2],
                    "source": r[3], "metadata": md, "group_id": r[5]})
    return out


def list_relations(ops_db: Path, name: str | None = None) -> list[dict]:
    conn = sqlite3.connect(ops_db)
    try:
        if name:
            cur = conn.execute(
                "SELECT id, name, from_entity, to_entity FROM relations "
                "WHERE name=? ORDER BY id", (name,))
        else:
            cur = conn.execute(
                "SELECT id, name, from_entity, to_entity FROM relations "
                "ORDER BY id")
        rows = cur.fetchall()
    finally:
        conn.close()
    return [{"id": r[0], "name": r[1], "from_entity": r[2], "to_entity": r[3]}
            for r in rows]


def run_enricher(enricher_id: str, ctx: dict, *, env: dict | None = None,
                 timeout: int = 30) -> tuple[int, dict | None, str]:
    """Lanza enrichers/<id>/run.py con el wire protocol estandar.

    Usa siempre el trampoline `_runner.py` para que el stub de
    requests se inyecte tanto con PYTHONPATH (Python normal) como con
    `_STUB_PATHS` (Python embebido de Windows que ignora PYTHONPATH).

    Returns: (exit_code, stdout_json_or_None, stderr_text)
    """
    run_py = ENRICHERS_DIR / enricher_id / "run.py"
    assert run_py.exists(), f"no existe {run_py}"
    runner = TESTS_DIR / "_runner.py"
    assert runner.exists(), f"no existe {runner}"

    full_env = os.environ.copy()
    if env:
        full_env.update(env)

    proc = subprocess.run(
        [str(PYTHON_BIN), str(runner), str(run_py)],
        input=json.dumps(ctx),
        capture_output=True,
        text=True,
        timeout=timeout,
        env=full_env,
    )
    parsed: dict | None = None
    if proc.stdout.strip():
        # Ultima linea no vacia es el JSON resumen.
        for line in reversed(proc.stdout.strip().splitlines()):
            line = line.strip()
            if not line:
                continue
            try:
                parsed = json.loads(line)
            except Exception:
                pass
            break
    return proc.returncode, parsed, proc.stderr


def base_ctx(*, ops_db, app_dir, registry_root, node_id, node_name,
             node_type, metadata=None, params=None) -> dict:
    """Construye el ctx tipico que jobs.cpp pasa por stdin."""
    return {
        "node_id":       node_id,
        "node_name":     node_name,
        "node_type":     node_type,
        "metadata":      metadata or {},
        "ops_db_path":   str(ops_db),
        "app_dir":       str(app_dir),
        "cache_dir":     str(Path(app_dir) / "cache"),
        "registry_root": str(registry_root),
        "params":        params or {},
    }