from shiny import reactive, render, ui
import os
import requests
from bs4 import BeautifulSoup
from dotenv import load_dotenv, find_dotenv
import tweepy
import time
from llm_connect import get_response

# Load environment variables
load_dotenv(find_dotenv(), override=True)

# Load credentials
API_KEY = os.getenv("TWITTER_ACC_API_KEY")
API_SECRET = os.getenv("TWITTER_ACC_API_SECRET")
ACCESS_TOKEN = os.getenv("TWITTER_ACC_ACCESS_TOKEN")
ACCESS_TOKEN_SECRET = os.getenv("TWITTER_ACC_ACCESS_TOKEN_SECRET")

generated_tweet = reactive.Value("")

def scrape_shopify_blog(url: str) -> str:
    try:
        resp = requests.get(url)
        soup = BeautifulSoup(resp.content, 'html.parser')
        section = soup.find(
            'div',
            class_='w940 align-center size-content'
        )
        return section.get_text(strip=True, separator=' ') if section else ""
    except Exception as e:
        return f"❌ Error scraping blog: {e}"

def generate_tweet_from_text(text: str, url: str='https://ultimasupply.com/blogs/news', max_len: int = 250) -> str:
    # Step 1: Generate tweet from blog content
    gen_prompt = (
        "You are a social media manager for a hobby e-commerce company called 'Ultima Supply'.\n"
        f"Write a single engaging Twitter post (max {max_len} characters) summarizing the following Shopify blog content:\n\n"
        f"{text}\n\n"
        f"The tweet MUST include this URL: {url}\n"
        "Use casual, fun language. Add emojis and 3–5 SEO-relevant hashtags. Keep it under the character limit and make it attention-grabbing."
    )


    tweet = get_response(
        input=gen_prompt,
        template=lambda x: x.strip(),
        llm='gemini',
        md=False,
        temperature=0.6,
        max_tokens=100
    ).strip()

    print(f'Base Tweet: {tweet}')

    # Step 2: If too long, ask Gemini to shorten it
    if len(tweet) <= max_len:
        return tweet
    else:
        time.sleep(5)

        shorten_prompt = (
            f"You are shortening this tweet to {max_len} characters or fewer.\n"
            f"YOU MUST KEEP ALL of the original SEO hashtags and the Shopify blog link intact in the final output.\n"
            f"DO NOT remove or modify the link or any hashtags.\n\n"
            f"Original tweet:\n{tweet}\n"
        )

        shortened = get_response(
            input=shorten_prompt,
            template=lambda x: x.strip(),
            llm='gemini',
            md=False,
            temperature=0.5,
            max_tokens=75
        ).strip()

        return shortened  # Final hard cap just in case


def generate_tweet_from_topic(topic: str, max_len: int = 250) -> str:
    # Step 1: Generate tweet from topic
    gen_prompt = (
        f"You are a social media manager for a hobby e-commerce brand called 'Ultima Supply'.\n"
        f"Write a SHORT SINGLE SENTENCE Twitter post (max {max_len} characters) about: '{topic}'.\n"
        f"Use casual, fun language. Include emojis and 3-5 SEO-relevant hashtags."
    )

    tweet = get_response(
        input=gen_prompt,
        template=lambda x: x.strip(),
        llm='gemini',
        md=False,
        temperature=0.6,
        max_tokens=100
    ).strip()

    print(f'Base Tweet: {tweet}')

    # Step 2: If too long, regenerate with shortening prompt
    if len(tweet) <= max_len:
        return tweet
    else:
        shorten_prompt = (
            f"You are shortening this tweet to {max_len} characters or fewer.\n"
            f"YOU MUST KEEP ALL of the original SEO hashtags and the Shopify blog link intact in the final output.\n"
            f"DO NOT remove or modify the link or any hashtags.\n\n"
            f"Original tweet:\n{tweet}\n"
        )


        shortened = get_response(
            input=shorten_prompt,
            template=lambda x: x.strip(),
            llm='gemini',
            md=False,
            temperature=0.5,
            max_tokens=75
        ).strip()


        return shortened  # Ensure hard cutoff if still too long


def tweet_input_handler(url: str, topic: str) -> str:
    if url.strip():
        raw_text = scrape_shopify_blog(url)
        if not raw_text or raw_text.startswith("❌"):
            return "⚠️ Failed to extract content from blog."
        return generate_tweet_from_text(raw_text)
    elif topic.strip():
        return generate_tweet_from_topic(topic)
    else:
        return "⚠️ Provide either a blog URL or a topic."

# Create Tweepy v2 Client
def get_tweepy_client():
    return tweepy.Client(
        consumer_key=API_KEY,
        consumer_secret=API_SECRET,
        access_token=ACCESS_TOKEN,
        access_token_secret=ACCESS_TOKEN_SECRET
    )

# Post tweet using Tweepy v2 Client
def post_tweet_tweepy(tweet_text: str) -> str:
    try:
        client = get_tweepy_client()
        response = client.create_tweet(text=tweet_text)
        tweet_id = response.data.get("id")
        print("✅ Tweet posted:", tweet_id)
        return f"✅ Tweet posted (ID: {tweet_id})"
    except Exception as e:
        print("❌ Failed to post tweet:", e)
        return f"❌ Failed to post tweet: {e}"

# Check auth by attempting to fetch own user (optional)
def check_twitter_connection() -> str:
    try:
        client = get_tweepy_client()
        user_data = client.get_me()
        if user_data and user_data.data:
            username = user_data.data.username
            print(f"✅ Connected to Twitter as @{username}")
            return f"✅ Connected to Twitter as @{username}"
        else:
            return "❌ Unable to fetch Twitter account info."
    except Exception as e:
        print("❌ Connection check failed:", e)
        return f"❌ Twitter auth error: {e}"

# ---- EXPORT THIS FOR app.py TO CALL ----
def server(input, output, session):
    @output
    @render.ui
    @reactive.event(input.gen_btn_twt)
    def tweet_draft():
        url = input.shopify_url().strip()
        topic = input.tweet_topic().strip()
        tweet = tweet_input_handler(url, topic)
        print("📝 Generated Tweet:\n", tweet)
        if tweet.startswith("⚠️"):
            return ui.HTML(f"<p><strong>{tweet}</strong></p>")
        generated_tweet.set(tweet)
        return ui.HTML(f"<p><strong>Generated Tweet:</strong><br>{tweet}</p>")

    @output
    @render.text
    @reactive.event(input.post_btn_twt)
    def tweet_post_status():
        status = check_twitter_connection()
        if status.startswith("❌"):
            return status
        tweet = generated_tweet()
        print("📤 Attempting to post tweet:", tweet)
        if not tweet:
            return "⚠️ No tweet generated yet."
        return post_tweet_tweepy(tweet)