"""Persistence Agentic Ops."""
from __future__ import annotations
import json, sqlite3
from datetime import datetime, timezone
from typing import Any

from app.agents.messages import init_messages_schema

def _now():
    return datetime.now(timezone.utc).isoformat()

def init_agent_schema(conn):
    init_messages_schema(conn)
    conn.executescript("""
        CREATE TABLE IF NOT EXISTS agent_scenarios (
            id TEXT PRIMARY KEY, title TEXT NOT NULL, schedule TEXT,
            severity_default TEXT NOT NULL DEFAULT 'warn', config_json TEXT NOT NULL,
            enabled INTEGER NOT NULL DEFAULT 1, updated_at TEXT NOT NULL);
        CREATE TABLE IF NOT EXISTS agent_runs (
            id INTEGER PRIMARY KEY, scenario_id TEXT NOT NULL, trigger TEXT NOT NULL DEFAULT 'cron',
            status TEXT NOT NULL, summary_text TEXT, llm_model TEXT, metadata_json TEXT,
            started_at TEXT NOT NULL, finished_at TEXT);
        CREATE TABLE IF NOT EXISTS agent_findings (
            id INTEGER PRIMARY KEY, run_id INTEGER NOT NULL, severity TEXT NOT NULL,
            category TEXT NOT NULL DEFAULT 'api', title TEXT NOT NULL, detail_md TEXT,
            evidence_json TEXT, suggested_human_action TEXT, kb_refs_json TEXT,
            acknowledged_at TEXT, acknowledged_by TEXT, created_at TEXT NOT NULL);
        CREATE TABLE IF NOT EXISTS agent_action_log (
            id INTEGER PRIMARY KEY, ts TEXT NOT NULL, agent_id TEXT NOT NULL DEFAULT 'sentinel',
            run_id INTEGER, event_type TEXT NOT NULL, message TEXT, payload_json TEXT);
        CREATE TABLE IF NOT EXISTS agent_kb_chunks (
            id INTEGER PRIMARY KEY, source_path TEXT NOT NULL, chunk_text TEXT NOT NULL, indexed_at TEXT NOT NULL);
        CREATE INDEX IF NOT EXISTS idx_agent_runs_scenario ON agent_runs(scenario_id);
    """)

def log_event(conn, *, event_type, message, agent_id="sentinel", run_id=None, payload=None):
    conn.execute("INSERT INTO agent_action_log (ts,agent_id,run_id,event_type,message,payload_json) VALUES (?,?,?,?,?,?)",
        (_now(), agent_id, run_id, event_type, message, json.dumps(payload or {})))
    try:
        conn.execute("INSERT INTO desk_security_audit (username,event_type,client_ip,payload,created_at) VALUES (?,?,?,?,?)",
            ("agentic", f"agent.{event_type}", "vm122", json.dumps({"message": message, **(payload or {})}), _now()))
    except sqlite3.OperationalError:
        pass

def upsert_scenario(conn, scenario):
    conn.execute("""INSERT INTO agent_scenarios (id,title,schedule,severity_default,config_json,enabled,updated_at)
        VALUES (?,?,?,?,?,1,?) ON CONFLICT(id) DO UPDATE SET title=excluded.title, schedule=excluded.schedule,
        severity_default=excluded.severity_default, config_json=excluded.config_json, updated_at=excluded.updated_at""",
        (scenario["id"], scenario["title"], scenario.get("schedule","*/5 * * * *"),
         scenario.get("severity_default","warn"), json.dumps(scenario), _now()))

def list_scenarios(conn):
    out = []
    for row in conn.execute("SELECT * FROM agent_scenarios WHERE enabled=1 ORDER BY id"):
        item = dict(row)
        item["config"] = json.loads(item.pop("config_json") or "{}")
        last = conn.execute("SELECT status,started_at FROM agent_runs WHERE scenario_id=? ORDER BY id DESC LIMIT 1", (row["id"],)).fetchone()
        item["last_run_status"] = last["status"] if last else None
        item["last_run_at"] = last["started_at"] if last else None
        out.append(item)
    return out

def get_scenario(conn, scenario_id):
    row = conn.execute("SELECT * FROM agent_scenarios WHERE id=? AND enabled=1", (scenario_id,)).fetchone()
    if not row: return None
    item = dict(row); item["config"] = json.loads(item.pop("config_json") or "{}"); return item

def create_run(conn, scenario_id, trigger):
    return int(conn.execute("INSERT INTO agent_runs (scenario_id,trigger,status,started_at) VALUES (?,?,?,?)",
        (scenario_id, trigger, "running", _now())).lastrowid)

def finish_run(conn, run_id, *, status, summary, llm_model=None, metadata=None):
    conn.execute("UPDATE agent_runs SET status=?,summary_text=?,llm_model=?,metadata_json=?,finished_at=? WHERE id=?",
        (status, summary, llm_model, json.dumps(metadata or {}), _now(), run_id))

def add_finding(conn, run_id, *, severity, category, title, detail_md="", evidence=None, human_action="", kb_refs=None):
    return int(conn.execute("""INSERT INTO agent_findings (run_id,severity,category,title,detail_md,evidence_json,
        suggested_human_action,kb_refs_json,created_at) VALUES (?,?,?,?,?,?,?,?,?)""",
        (run_id, severity, category, title, detail_md, json.dumps(evidence or {}), human_action,
         json.dumps(kb_refs or []), _now())).lastrowid)

def list_findings(conn, *, severity=None, limit=50, open_only=True):
    q, params = "SELECT * FROM agent_findings WHERE 1=1", []
    if severity: q += " AND severity=?"; params.append(severity)
    if open_only: q += " AND acknowledged_at IS NULL"
    q += " ORDER BY id DESC LIMIT ?"; params.append(limit)
    return [dict(r) for r in conn.execute(q, params)]

def list_action_log(conn, limit=100):
    return [dict(r) for r in conn.execute("SELECT * FROM agent_action_log ORDER BY id DESC LIMIT ?", (limit,))]

def index_kb_file(conn, source_path, text):
    conn.execute("DELETE FROM agent_kb_chunks WHERE source_path=?", (source_path,))
    now = _now()
    for i in range(0, len(text), 1200):
        conn.execute("INSERT INTO agent_kb_chunks (source_path,chunk_text,indexed_at) VALUES (?,?,?)",
            (source_path, text[i:i+1200], now))

def search_kb(conn, query, limit=8):
    terms = [t.strip().lower() for t in query.split() if len(t.strip()) > 2]
    if not terms: return []
    scored = []
    for row in conn.execute("SELECT source_path,chunk_text FROM agent_kb_chunks"):
        score = sum(1 for t in terms if t in row["chunk_text"].lower())
        if score: scored.append((score, {"source": row["source_path"], "snippet": row["chunk_text"][:400]}))
    scored.sort(key=lambda x: -x[0])
    return [s[1] for s in scored[:limit]]