import os
import json
import requests
from jdatetime import datetime, timedelta
from dotenv import load_dotenv

# Load local configuration without overriding variables supplied by the shell or CI.
load_dotenv()

BARGHEMAN_TOKEN = os.getenv("BARGHEMAN_TOKEN", "").strip()
EITAAYAR_TOKEN = os.getenv("EITAAYAR_TOKEN", "").strip()
CHAT_ID = os.getenv("CHAT_ID", "").strip()
BILL_IDS = [bill_id.strip() for bill_id in os.getenv("BILL_IDS", "").split(",") if bill_id.strip()]
BLACKOUTS_FILE = os.getenv("BLACKOUTS_FILE", "").strip()

required_settings = {
    "BARGHEMAN_TOKEN": BARGHEMAN_TOKEN,
    "EITAAYAR_TOKEN": EITAAYAR_TOKEN,
    "CHAT_ID": CHAT_ID,
    "BILL_IDS": BILL_IDS,
    "BLACKOUTS_FILE": BLACKOUTS_FILE,
}
missing_settings = [name for name, value in required_settings.items() if not value]
if missing_settings:
    raise EnvironmentError(f"Missing required environment variables: {', '.join(missing_settings)}")

today = datetime.now()
to_date = today + timedelta(days=5)


def get_blackouts(bill_id) -> list:
    url = "https://uiapi2.saapa.ir/api/ebills/PlannedBlackoutsReport"
    url = "https://abat-lms.rodad.net/PlannedBlackoutsReport"
    headers = {
        'accept': 'application/json',
        "Authorization": f"Bearer {BARGHEMAN_TOKEN}",
    }
    payload = {
        "bill_id": bill_id,
        "from_date": today.strftime("%Y/%m/%d"),
        "to_date": to_date.strftime("%Y/%m/%d"),
    }
    response = requests.post(url, headers=headers, json=payload)
    if response.ok:
        return response.json().get("data", [])
    else:
        print(f"❌ Failed to get blackouts: {response.text}")
        return []


def load_blackouts() -> dict:
    if os.path.exists(BLACKOUTS_FILE):
        with open(BLACKOUTS_FILE, "r", encoding="utf-8") as f:
            return json.load(f)
    return {}


def save_blackouts(data) -> None:
    with open(BLACKOUTS_FILE, "w", encoding="utf-8") as f:
        json.dump(data, f, ensure_ascii=False, indent=2)


def format_message(bill_id, entry):
    RTLM = "\u200f"
    return f"{RTLM}\n{RTLM}".join([
        f"⚡️ اطلاعیه خاموشی برق",
        f"🆔 شناسه قبض: {bill_id}",
        f"📅 تاریخ: {entry['outage_date']}",
        f"⏰ ساعت: {entry['outage_start_time']} تا {entry['outage_stop_time']}",
        f"📍 محل: {entry['outage_address']}",
        f"📝 دلیل: {entry['reason_outage']}",
        f"📥 ارسال شده در {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}",
        f".",
    ])


def send_message(text):
    url = f"https://eitaayar.ir/api/{EITAAYAR_TOKEN}/sendMessage"
    payload = {
        "chat_id": CHAT_ID,
        "text": text,
        "parse_mode": "HTML"
    }
    response = requests.get(url, params=payload)
    if not response.ok:
        print(f"❌ Failed to send message: {response.text}")


def is_entries_valid(entries: list) -> bool:
    return 0 < len(entries) < 10


def main() -> None:
    previous_data = load_blackouts()
    updated_data = previous_data.copy()

    for bill_id in BILL_IDS:
        new_blackouts = get_blackouts(bill_id)
        old_blackouts = previous_data.get(bill_id, [])

        new_entries = [entry for entry in new_blackouts if entry not in old_blackouts]

        if not is_entries_valid(new_entries):
            print('unusual entries was received. count:', len(new_entries))
            print(json.dumps(new_entries, ensure_ascii=False, indent=2))
            continue

        for entry in new_entries:
            message = format_message(bill_id, entry)
            send_message(message)

        if new_entries:
            updated_data[bill_id] = old_blackouts + new_entries

    save_blackouts(updated_data)


if __name__ == '__main__':
    main()

"""
curl ^"https://uiapi2.saapa.ir/api/ebills/PlannedBlackoutsReport^" ^
  --compressed ^
  -X POST ^
  -H ^"Authorization: Bearer ...^" ^
  --data-raw ^"{\"bill_id\":\"7619314604429\",\"from_date\":\"1404/03/11\",\"to_date\":\"1404/03/16\"}^"
"""