#!/usr/bin/env python3
"""CX Triage - diagnose Infrahub error alerts using the CX-Tools collectors.

Read-only: this tool queries Infrahub, OpenStack, InfraInsight and Prometheus,
and suggests what to do. It never changes platform state and never sends
customer comms.
"""
from __future__ import annotations

import argparse
import os
import sys
import webbrowser

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from triagelib import VERSION, cxbridge  # noqa: E402
from triagelib.prometheus import DEFAULT_BASE, PrometheusClient, PrometheusError  # noqa: E402


def preflight(prometheus_base: str) -> bool:
    ok = True

    print("Locating CX-Tools...")
    try:
        path = cxbridge.locate_cx_tools()
        print(f"  found: {path}")
    except cxbridge.BridgeError as exc:
        print(f"  FAIL: {exc}", file=sys.stderr)
        return False

    # Done in the foreground so any 1Password prompt reaches the terminal
    # rather than a background HTTP worker.
    print("Loading API credentials from 1Password (CX-Tools loader)...")
    try:
        cxbridge.bootstrap()
        print("  credentials loaded")
    except cxbridge.BridgeError as exc:
        print(f"  FAIL: {exc}", file=sys.stderr)
        ok = False

    print(f"Checking Prometheus at {prometheus_base}...")
    try:
        print(f"  reachable ({PrometheusClient(prometheus_base).describe_transport()})")
    except PrometheusError as exc:
        print(f"  WARN: {exc}", file=sys.stderr)
        print("  The app will still start; paste alerts manually until this is fixed.", file=sys.stderr)

    return ok


def main() -> int:
    parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
    parser.add_argument("--host", default="127.0.0.1", help="bind address (default: localhost only)")
    parser.add_argument("--port", type=int, default=8765, help="port (default: 8765)")
    parser.add_argument("--prometheus", default=DEFAULT_BASE, help=f"Prometheus base URL (default: {DEFAULT_BASE})")
    parser.add_argument("--no-open", action="store_true", help="do not open a browser on start")
    parser.add_argument("--check", action="store_true", help="run preflight checks and exit")
    parser.add_argument("--version", action="version", version=VERSION)
    args = parser.parse_args()

    if not preflight(args.prometheus):
        return 1
    if args.check:
        print("preflight OK")
        return 0

    url = f"http://{args.host}:{args.port}"
    if not args.no_open:
        webbrowser.open(url)

    from triagelib.server import serve

    serve(host=args.host, port=args.port, prometheus_base=args.prometheus)
    return 0


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