from fastapi import FastAPI
import os, requests
from datetime import datetime
import pytz
from dotenv import load_dotenv

load_dotenv()

app = FastAPI()

clickup_api = os.getenv('CLICKUP_API_KEY')
telegram_bot_token = os.getenv('TELEGRAM_BOT_TOKEN')
telegram_chat_id = os.getenv('TELEGRAM_CHAT_ID')
TIMEZONE = 'Asia/Dhaka'

LISTS = [
    {"id": '901800830748', "title": "*Developer Task Board:*"},
    {"id": '901800835985', "title": "*Designer Task Board:*"}
]

def get_tasks(list_id):
    headers = {"Authorization": clickup_api}
    url = f"https://api.clickup.com/api/v2/list/{list_id}/task"
    resp = requests.get(url, headers=headers)
    data = resp.json()
    tasks = data.get("tasks", [])

    tz = pytz.timezone(TIMEZONE)
    today = datetime.now(tz).date()

    filtered_tasks = []
    for task in tasks:
        due_ts = task.get("due_date")
        status = task.get("status", {}).get("status", "").lower()

        if status in ["done", "complete", "completed"]:
            continue

        if due_ts:
            due_dt = datetime.fromtimestamp(int(due_ts) / 1000, tz).date()
            if due_dt >= today:
                filtered_tasks.append(task)

    return filtered_tasks

def send_to_telegram(message):
    url = f"https://api.telegram.org/bot{telegram_bot_token}/sendMessage"
    payload = {
        "chat_id": telegram_chat_id,
        "text": message,
        "parse_mode": "Markdown"
    }
    return requests.post(url, data=payload)

def format_and_send(list_id, board_title):
    tasks = get_tasks(list_id)
    if not tasks:
        return send_to_telegram(f"{board_title}\nNo tasks due today!")

    tz = pytz.timezone(TIMEZONE)
    task_map = {}
    today_str = datetime.now(tz).strftime("%B %d, %Y")

    for task in tasks:
        task_name = task.get("name", "No title")
        task_url = task.get("url", "")
        due_ts = task.get("due_date")
        status = task.get("status", {}).get("status", "Unknown")

        due_str = datetime.fromtimestamp(int(due_ts) / 1000, tz).strftime("%B %d, %Y") if due_ts else "No due time"
        assignees = task.get("assignees", []) or [{"name": "Unassigned"}]

        for a in assignees:
            name = a.get("name") or a.get("username") or a.get("email") or "Unassigned"
            task_map.setdefault(name, []).append(f"- [{task_name}]({task_url}) ({due_str}) - *{status}*")

    msg = f"{board_title} ({today_str})\n"
    for name, items in task_map.items():
        msg += f"\n*{name}* is assigned at:\n" + "\n".join(items) + "\n"

    return send_to_telegram(msg + "\n")

@app.get("/")
def run_notifier():
    results = []
    for board in LISTS:
        resp = format_and_send(board["id"], board["title"])
        results.append(resp.json())
    return {"status": "sent", "results": results}