from __future__ import annotations

import json
import sqlite3
import time
from datetime import datetime, timezone
from pathlib import Path
from urllib.error import URLError
from urllib.request import Request, urlopen


ROOT = Path(__file__).resolve().parents[1]
DB_PATH = ROOT / ".data_local" / "mvp_cc.db"
OUT_DIR = ROOT / ".artifacts" / "track12-monitor"
OUT_DIR.mkdir(parents=True, exist_ok=True)
OUT_PATH = OUT_DIR / "latest.log"

BASE_URL = "http://127.0.0.1:8080"
AUTH_BASE_URL = "http://127.0.0.1:8001"
USERNAME = "operator"
PASSWORD = "op12345"
ROLE = "operator"
WINDOW_SECONDS = 180
POLL_SECONDS = 1.0


def iso_now() -> str:
    return datetime.now(timezone.utc).astimezone().isoformat(timespec="seconds")


def write_line(handle, label: str, payload) -> None:
    handle.write(f"[{iso_now()}] {label} {json.dumps(payload, ensure_ascii=False, sort_keys=True)}\n")
    handle.flush()


def login_headers() -> dict[str, str]:
    body = json.dumps(
        {
            "username": USERNAME,
            "password": PASSWORD,
            "role": ROLE,
        }
    ).encode("utf-8")
    req = Request(
        f"{AUTH_BASE_URL}/auth/login",
        headers={"Content-Type": "application/json"},
        data=body,
        method="POST",
    )
    with urlopen(req, timeout=10) as response:
        payload = json.loads(response.read().decode("utf-8", errors="replace"))
    token = str(payload.get("access_token") or "").strip()
    if not token:
        raise RuntimeError("auth/login did not return access_token")
    return {"Authorization": f"Bearer {token}"}


def fetch_json(path: str, headers: dict[str, str]):
    req = Request(
        f"{BASE_URL}{path}",
        headers=headers,
        method="GET",
    )
    with urlopen(req, timeout=10) as response:
        body = response.read().decode("utf-8", errors="replace")
    return json.loads(body)


def latest_events(conn: sqlite3.Connection, limit: int = 6) -> list[dict]:
    rows = conn.execute(
        """
        select event_id, event_type, call_id, interaction_id, payload_json, created_at
        from voice_events
        order by id desc
        limit ?
        """,
        (limit,),
    ).fetchall()
    result = []
    for row in rows:
        payload = row["payload_json"]
        try:
            payload = json.loads(payload)
        except Exception:
            pass
        result.append(
            {
                "event_id": row["event_id"],
                "event_type": row["event_type"],
                "call_id": row["call_id"],
                "interaction_id": row["interaction_id"],
                "payload": payload,
                "created_at": row["created_at"],
            }
        )
    return result


def latest_links(conn: sqlite3.Connection, limit: int = 4) -> list[dict]:
    rows = conn.execute(
        """
        select call_id, interaction_id, status, telephony_status, claimed_by_user,
               operator_extension, started_at, connected_at, ended_at
        from asterisk_call_links
        order by id desc
        limit ?
        """,
        (limit,),
    ).fetchall()
    return [dict(row) for row in rows]


def main() -> int:
    with OUT_PATH.open("w", encoding="utf-8") as handle:
        write_line(handle, "monitor", {"status": "started", "window_seconds": WINDOW_SECONDS})
        conn = sqlite3.connect(DB_PATH)
        conn.row_factory = sqlite3.Row
        headers = login_headers()
        write_line(handle, "auth", {"status": "ok", "user": USERNAME, "role": ROLE})
        end_at = time.time() + WINDOW_SECONDS
        seen = {
            "live": None,
            "recent": None,
            "events": None,
            "links": None,
        }
        try:
            while time.time() < end_at:
                try:
                    live = fetch_json("/proxy/asterisk-bridge/asterisk/live-calls", headers)
                    if live != seen["live"]:
                        seen["live"] = live
                        write_line(handle, "live-calls", live)
                except URLError as exc:
                    write_line(handle, "live-calls-error", {"error": str(exc)})

                try:
                    recent = fetch_json("/proxy/asterisk-bridge/asterisk/recent-calls", headers)
                    if recent != seen["recent"]:
                        seen["recent"] = recent
                        write_line(handle, "recent-calls", recent)
                except URLError as exc:
                    write_line(handle, "recent-calls-error", {"error": str(exc)})

                events = latest_events(conn)
                if events != seen["events"]:
                    seen["events"] = events
                    write_line(handle, "voice-events", events)

                links = latest_links(conn)
                if links != seen["links"]:
                    seen["links"] = links
                    write_line(handle, "call-links", links)

                time.sleep(POLL_SECONDS)
        finally:
            conn.close()
            write_line(handle, "monitor", {"status": "finished"})
    return 0


if __name__ == "__main__":
    raise SystemExit(main())