import requests
import json
from datetime import datetime
import re

TI_API_URL = "https://ti-lage.prod.ccs.gematik.solutions/lageapi/v2/tilage"
WEBHOOK_URL = "https://mattermost.medisoftware.org/hooks/i67zgcgajifxxxtfwjxcxace7a"
STATE_FILE = "ti_status_state.json"

def fetch_status_messages():
    resp = requests.get(TI_API_URL)
    resp.raise_for_status()
    data = resp.json()
    messages = []
    for meldung in data.get("meldungen", []):
        zeit = meldung.get("zeitpunkt", "")
        titel = meldung.get("titel", "")
        beschreibung = meldung.get("beschreibung", "")
        link = meldung.get("link", "")
        msg = f"{zeit}\n- {titel}: {beschreibung}\n{link}".strip()
        messages.append(msg)
    return messages

def load_state():
    try:
        with open(STATE_FILE, "r", encoding="utf-8") as f:
            return json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return {"messages": []}

def save_state(state):
    with open(STATE_FILE, "w", encoding="utf-8") as f:
        json.dump(state, f, ensure_ascii=False, indent=2)

def markdownify_message(message):
    # Datumsangaben fett hervorheben (z.B. 2025-06-23 oder 23.06.2025)
    message = re.sub(r"(\d{4}-\d{2}-\d{2})", r"**\1**", message)
    message = re.sub(r"(\d{2}\.\d{2}\.\d{4})", r"**\1**", message)
    # URLs als Links darstellen
    message = re.sub(r"(https?://\S+)", r"[\1](\1)", message)
    # Listenpunkte erkennen (z.B. mit - oder *)
    lines = message.splitlines()
    md_lines = []
    for line in lines:
        line = line.strip()
        if line.startswith("-") or line.startswith("*"):
            md_lines.append(f"- {line[1:].strip()}")
        else:
            md_lines.append(line)
    # Absätze durch doppelte Zeilenumbrüche trennen
    md_message = "\n\n".join([l for l in md_lines if l])
    return md_message

def send_to_mattermost(message):
    md_message = markdownify_message(message)
    payload = {
        "text": f"#### Neue TI-Status-Meldung\n\n{md_message}\n\n[Zur Statusseite](https://fachportal.gematik.de/ti-status)\n_Gemeldet am {datetime.now().strftime('%d.%m.%Y %H:%M:%S')}_"
    }
    resp = requests.post(WEBHOOK_URL, json=payload)
    resp.raise_for_status()

def main():
    state = load_state()
    known_messages = set(state.get("messages", []))
    print("Prüfe TI-Status-API auf neue Meldungen...")
    try:
        messages = fetch_status_messages()
        new_messages = [m for m in messages if m not in known_messages]
        for msg in new_messages:
            print(f"Neue Meldung gefunden: {msg}")
            send_to_mattermost(msg)
            known_messages.add(msg)
        if new_messages:
            save_state({"messages": list(known_messages)})
        else:
            print(f"Keine neuen Meldungen ({datetime.now().strftime('%H:%M:%S')})")
    except Exception as e:
        print(f"Fehler: {e}")

if __name__ == "__main__":
    main()