import logging
import os
from typing import Any

from telegram import Update
from telegram.ext import Application, CommandHandler, ContextTypes
from dotenv import load_dotenv
from api.finnhub.financial_news_requester import fetch_comp_financial_news
from fastapi import FastAPI, Request
import uvicorn
import httpx


logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

load_dotenv()


BOT_TOKEN = os.getenv("BOT_TOKEN") or os.getenv("TELEGRAM_TOKEN")
if not BOT_TOKEN:
    logger.error("BOT_TOKEN not found! Please add it in Space Settings > Repository secrets")
    raise ValueError("BOT_TOKEN not found in environment variables")

SPACE_ID = os.environ.get('SPACE_ID', 'researchengineering-news_sentiment_analyzer')
PORT = int(os.environ.get('PORT', 7860))


application = None


def format_news_for_telegram(news_json: list[dict[str, Any]]) -> str:
    message = ""
    for item in news_json:
        message += (
            f"📰 <b>{item.get('headline', 'No headline')}</b>\n"
            f"📝 {item.get('summary', 'No summary')}\n"
            f"🏷️ Source: {item.get('source', 'Unknown')}\n"
            f"🔗 <a href=\"{item.get('url', '#')}\">Read more</a>\n\n"
        )
    return message if message else "No news available."


async def start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text("Hello! I'm your Financial News Bot. Use /run to get latest news.")


async def help_command(update: Update, context: ContextTypes.DEFAULT_TYPE):
    """Handle /help command"""
    await update.message.reply_text(
        "🤖 Available commands:\n"
        "/start - Start the bot\n"
        "/help - Show this help\n"
        "/run - Get latest financial news"
    )


async def run_crew(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text("Fetching latest financial news...")
    try:
        feed = fetch_comp_financial_news()
        logger.info(f"Processed: {len(feed)} news items")
        formatted_news = format_news_for_telegram(feed)
        # Split message if too long (Telegram limit is 4096 characters)
        if len(formatted_news) > 4000:
            # Split by news items, not by character count
            items = formatted_news.split('\n\n')
            chunk = ""
            for item in items:
                if len(chunk) + len(item) + 2 > 4000:
                    await update.message.reply_text(chunk, parse_mode='HTML')
                    chunk = ""
                chunk += item + "\n\n"
            if chunk:
                await update.message.reply_text(chunk, parse_mode='HTML')
        else:
            await update.message.reply_text(formatted_news, parse_mode='HTML')
    except Exception as e:
        logger.error(f"Error in run_crew: {e}")
        await update.message.reply_text(f"Sorry, there was an error fetching news: {str(e)}")


# Initialize the Telegram application
async def init_telegram_app():
    global application
    application = Application.builder().token(BOT_TOKEN).build()

    # Add handlers
    application.add_handler(CommandHandler("start", start))
    application.add_handler(CommandHandler("help", help_command))
    application.add_handler(CommandHandler("run", run_crew))

    # Initialize the application
    await application.initialize()
    logger.info("Telegram application initialized successfully")

# Create FastAPI app
app = FastAPI(title="Financial News Bot", description="Telegram bot for financial news")


@app.on_event("startup")
async def startup_event() -> None:
    """Initialize Telegram bot on FastAPI startup"""
    await init_telegram_app()


@app.on_event("shutdown")
async def shutdown_event() -> None:
    """Cleanup on shutdown"""
    global application
    if application:
        await application.shutdown()


@app.post(f"/{BOT_TOKEN}")
async def webhook(request: Request) -> dict[str, Any]:
    """Handle incoming webhook from Telegram"""
    try:
        # Get the update from Telegram
        json_data = await request.json()
        update = Update.de_json(json_data, application.bot)

        # Process the update
        await application.process_update(update)

        return {"status": "ok"}
    except Exception as e:
        logger.error(f"Error processing update: {e}")
        return {"status": "error", "message": str(e)}


@app.get("/")
async def root() -> dict[str, Any]:
    """Health check endpoint"""
    return {
        "status": "Financial News Bot is running!",
        "webhook_url": f"https://{SPACE_ID}.hf.space/{BOT_TOKEN[:10]}...",
        "space_id": SPACE_ID,
        "available_endpoints": ["/", "/set_webhook", "/webhook_info", "/health"],
        "bot_initialized": application is not None
    }


@app.get("/set_webhook")
async def set_webhook() -> dict[str, Any]:
    """Manually set the webhook (call this once after deployment)"""
    try:
        webhook_url = f"https://{SPACE_ID}.hf.space/{BOT_TOKEN}"
        set_webhook_url = f"https://api.telegram.org/bot{BOT_TOKEN}/setWebhook"

        logger.info(f"Setting webhook to: {webhook_url}")

        async with httpx.AsyncClient(timeout=30.0) as client:
            response = await client.post(set_webhook_url, json={
                "url": webhook_url,
                "drop_pending_updates": True
            })
            result = response.json()

        if result.get("ok"):
            logger.info("Webhook set successfully!")
            return {"status": "success", "webhook_url": webhook_url, "result": result}
        else:
            logger.error(f"Failed to set webhook: {result}")
            return {"status": "error", "result": result}

    except Exception as e:
        logger.error(f"Error setting webhook: {e}")
        return {"status": "error", "message": str(e)}


@app.get("/webhook_info")
async def webhook_info() -> dict[str, Any]:
    """Get current webhook information"""
    try:
        info_url = f"https://api.telegram.org/bot{BOT_TOKEN}/getWebhookInfo"

        async with httpx.AsyncClient(timeout=30.0) as client:
            response = await client.get(info_url)
            result = response.json()

        return result
    except Exception as e:
        logger.error(f"Error getting webhook info: {e}")
        return {"status": "error", "message": str(e)}


@app.get("/health")
async def health() -> dict[str, Any]:
    """Additional health check"""
    return {"status": "healthy", "bot_token_set": bool(BOT_TOKEN)}


def main() -> None:
    logger.info(f"Starting Financial News Bot on port {PORT}")
    logger.info(f"Bot token: {BOT_TOKEN[:10]}..." if BOT_TOKEN else "No token set")
    logger.info(f"Space ID: {SPACE_ID}")
    logger.info(f"Webhook URL will be: https://{SPACE_ID}.hf.space/{BOT_TOKEN[:10]}...")
    logger.info("After deployment, visit /set_webhook to configure the webhook")

    uvicorn.run(app, host="0.0.0.0", port=PORT)
    #application.run_polling()