#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Zapise poznamku lekare do Medevio kalendare (color=CHARCOAL).

Hlavni funkce: `zapis_poznamku()` - bere parametry:
    calendar_id  UUID kalendare (Vlado / manzelka / ...)
    den          date nebo str 'YYYY-MM-DD'
    cas          str 'HH:MM' nebo time
    trvani_min   int - delka v minutach
    poznamka     str - text
    perioda      None | str - "DAILY", "WEEKDAYS", atd. (zatim NotImplemented)
    color        ECRFIconColor enum, default CHARCOAL
    clinic_slug  default mudr-buzalkova

Vrati id vytvorene rezervace (str).

CLI:
    python zapis_poznamky.py --den 2026-06-03 --cas 09:00 --trvani 5 --poznamka "Text"
    python zapis_poznamky.py --den 2026-06-03 --cas 09:00 --trvani 5 --poznamka "Text" --kalendar manzelka
"""

import sys
import json
import argparse
from pathlib import Path
from datetime import datetime, date, time as dtime, timedelta

import requests
from dateutil import tz

try:
    sys.stdout.reconfigure(encoding="utf-8")
except AttributeError:
    pass

GRAPHQL_URL = "https://api.medevio.cz/graphql"
CLINIC_SLUG = "mudr-buzalkova"
PRAGUE_TZ = tz.gettz("Europe/Prague")

# Pojmenovane kalendare - viz pamet project-medevio-kalendar
CALENDARS = {
    "vlado":    "b6555c7e-4e95-4657-b441-87c2c9a7b2ca",
    "manzelka": "144c4e12-347c-49ca-9ec0-8ca965a4470d",
}
DEFAULT_CALENDAR = "vlado"

BASE_DIR = Path(__file__).resolve().parent
TOKEN_PATH = BASE_DIR / "token.txt"
DEBUG_DIR = BASE_DIR / "debug"

MUTATION = """mutation CreateReservation_MakeReservationByDoctor(
  $clinicSlug: String!,
  $color: ECRFIconColor,
  $note: String!,
  $timeSlotInput: TimeSlotInput!
) {
  reservation: makeReservationByDoctor(
    clinicSlug: $clinicSlug
    color: $color
    note: $note
    timeSlotInput: $timeSlotInput
  ) {
    id
    __typename
  }
}"""


def _load_token() -> str:
    token = TOKEN_PATH.read_text(encoding="utf-8").strip()
    if token.startswith("Bearer "):
        token = token.split(" ", 1)[1]
    return token


def _headers() -> dict:
    return {
        "content-type": "application/json",
        "authorization": f"Bearer {_load_token()}",
        "origin": "https://my.medevio.cz",
        "referer": "https://my.medevio.cz/",
    }


def _to_utc_iso(dt: datetime) -> str:
    if dt.tzinfo is None:
        dt = dt.replace(tzinfo=PRAGUE_TZ)
    return dt.astimezone(tz.UTC).strftime("%Y-%m-%dT%H:%M:%S.000Z")


def _resolve_calendar(calendar) -> str:
    """Prijme UUID nebo nazev ('vlado', 'manzelka'). Vrati UUID."""
    if calendar in CALENDARS:
        return CALENDARS[calendar]
    if isinstance(calendar, str) and len(calendar) == 36 and calendar.count("-") == 4:
        return calendar
    raise ValueError(f"Neznamy kalendar: {calendar!r}. Pouzij UUID nebo jeden z {list(CALENDARS)}.")


def _resolve_day(den) -> date:
    if isinstance(den, date) and not isinstance(den, datetime):
        return den
    if isinstance(den, datetime):
        return den.date()
    return datetime.strptime(str(den), "%Y-%m-%d").date()


def _resolve_time(cas) -> dtime:
    if isinstance(cas, dtime):
        return cas
    return datetime.strptime(str(cas), "%H:%M").time()


def zapis_poznamku(
    calendar: str = DEFAULT_CALENDAR,
    den=None,
    cas=None,
    trvani_min: int = 5,
    poznamka: str = "",
    perioda: str | None = None,
    color: str = "CHARCOAL",
    clinic_slug: str = CLINIC_SLUG,
    save_debug: bool = True,
) -> str:
    """Vytvori poznamku lekare v Medevio kalendari. Vraci id rezervace."""
    if perioda is not None:
        raise NotImplementedError(
            "Periodicita zatim neni implementovana - neznam format payloadu. "
            "Zachyt jednu opakujici se rezervaci pres Claude in Chrome a doplnime."
        )
    if den is None or cas is None:
        raise ValueError("Musis zadat 'den' a 'cas'.")

    calendar_id = _resolve_calendar(calendar)
    d = _resolve_day(den)
    t = _resolve_time(cas)
    start_dt = datetime.combine(d, t).replace(tzinfo=PRAGUE_TZ)
    end_dt = start_dt + timedelta(minutes=int(trvani_min))

    payload = {
        "operationName": "CreateReservation_MakeReservationByDoctor",
        "variables": {
            "clinicSlug": clinic_slug,
            "color": color,
            "note": poznamka,
            "timeSlotInput": {
                "calendarId": calendar_id,
                "start": _to_utc_iso(start_dt),
                "end": _to_utc_iso(end_dt),
            },
        },
        "query": MUTATION,
    }

    r = requests.post(GRAPHQL_URL, headers=_headers(), data=json.dumps(payload), timeout=30)
    r.raise_for_status()
    data = r.json()

    if save_debug:
        DEBUG_DIR.mkdir(exist_ok=True)
        debug_path = DEBUG_DIR / f"poznamka_{datetime.now():%Y%m%d_%H%M%S}.json"
        debug_path.write_text(
            json.dumps({"request": payload["variables"], "response": data}, ensure_ascii=False, indent=2),
            encoding="utf-8",
        )
        print(f"[debug] {debug_path}")

    if "errors" in data:
        raise RuntimeError(f"GraphQL error: {data['errors']}")

    res_id = data["data"]["reservation"]["id"]
    print(f"OK: {d} {t:%H:%M} +{trvani_min}min  '{poznamka}'  -> {res_id}")
    return res_id


def main():
    ap = argparse.ArgumentParser(description="Zapis poznamku lekare do Medevio kalendare.")
    ap.add_argument("--kalendar", default=DEFAULT_CALENDAR,
                    help=f"Jmeno ({'/'.join(CALENDARS)}) nebo UUID. Default '{DEFAULT_CALENDAR}'.")
    ap.add_argument("--den", required=True, help="YYYY-MM-DD")
    ap.add_argument("--cas", required=True, help="HH:MM (lokalni cas Europe/Prague)")
    ap.add_argument("--trvani", type=int, default=5, help="delka v minutach (default 5)")
    ap.add_argument("--poznamka", required=True, help="text poznamky")
    ap.add_argument("--perioda", default=None,
                    help="opakovani (zatim NotImplemented)")
    ap.add_argument("--color", default="CHARCOAL")
    args = ap.parse_args()

    zapis_poznamku(
        calendar=args.kalendar,
        den=args.den,
        cas=args.cas,
        trvani_min=args.trvani,
        poznamka=args.poznamka,
        perioda=args.perioda,
        color=args.color,
    )


if __name__ == "__main__":
    main()