import os
import urllib.parse
import streamlit as st
import requests

# Load configuration from environment variables
FRONTEND_PASSWORD = os.environ.get("FE_PASS")
HF_TOKEN = os.environ.get("HF_TOKEN")
API_URL = os.environ.get("END_POINT_URL")

if not all([FRONTEND_PASSWORD, HF_TOKEN, API_URL]):
    raise RuntimeError("Please set FE_PASS, HF_TOKEN, and END_POINT_URL environment variables.")


def main():
    # Page config
    st.set_page_config(
        page_title="Automated Reporter",
        page_icon="🤖",
        layout="centered",
    )

    # Custom CSS for enhanced styling
    st.markdown("""
    <style>
    /* Page background and container */
    .stApp { background-color: #f7f9fc; }
    .block-container { padding: 2rem 1rem; max-width: 800px; margin: auto; }

    /* Title styling */
    .stMarkdown h1, .stMarkdown h2, .stMarkdown h3 { color: #333; }

    /* Input fields styling */
    div.stTextInput>div>div>input, div.stTextArea>div>div>textarea {
        border-radius: 8px !important;
        border: 1px solid #ccc !important;
        padding: 0.6rem !important;
        font-size: 1rem !important;
    }

    /* Button styling */
    div.stButton>button {
        background-color: #4caf50 !important;
        color: white !important;
        padding: 0.75rem 1.5rem !important;
        border-radius: 8px !important;
        font-size: 1rem !important;
        transition: background-color 0.3s ease;
    }
    div.stButton>button:hover {
        background-color: #45a049 !important;
    }

    /* Error and success message styling */
    .stError, .stSuccess { font-weight: bold; }

    /* WhatsApp share link styling */
    a.whatsapp-share {
        display: inline-block;
        margin-top: 0.5rem;
        color: #25D366;
        font-weight: bold;
        text-decoration: none;
    }
    a.whatsapp-share:hover { text-decoration: underline; }
    </style>
    """, unsafe_allow_html=True)

    # Password prompt before showing UI
    password = st.text_input("Enter password", type="password", placeholder="UI Access Password")
    if password != FRONTEND_PASSWORD:
        if password:
            st.error("Invalid password. Please try again.")
        return

    # Header
    st.title("🤖 Automated Reporter")
    st.markdown("Publish your news now – an advanced AI by Vinamra.")

    # User inputs
    title = st.text_input("Post Title", max_chars=150, placeholder="Enter a descriptive title")
    news_input = st.text_area("Raw News Text", height=200, placeholder="Paste your raw news text here")
    image = st.file_uploader("Featured Image", type=["png", "jpg", "jpeg", "gif"])

    # Publish button
    if st.button("Publish News"):
        # Validation
        if not title:
            st.error("Please provide a post title.")
            return
        if not news_input:
            st.error("Please provide the raw news text.")
            return
        if image is None:
            st.error("Please upload a featured image.")
            return

        # Send request
        with st.spinner("Publishing..."):
            try:
                files = {"image": (image.name, image, image.type)}
                data = {"title": title, "news_input": news_input}
                headers = {"Authorization": f"Bearer {HF_TOKEN}"}
                response = requests.post(
                    API_URL,
                    data=data,
                    files=files,
                    headers=headers,
                    timeout=60
                )

                if response.status_code == 201:
                    try:
                        result = response.json()
                    except ValueError:
                        st.error("Failed to parse JSON response.")
                        return

                    raw_url = result.get('post_url')
                    # Decode percent-encoded URL to display properly
                    decoded_url = urllib.parse.unquote(raw_url)

                    st.success("🎉 Post published successfully!")
                    # Display clickable decoded URL text
                    st.markdown(f"**Post URL:** [Click here]({decoded_url})")

                    # Share via WhatsApp: encode decoded URL for message text
                    share_text = decoded_url
                    encoded_text = urllib.parse.quote_plus(share_text)
                    whatsapp_link = f"https://wa.me/?text={encoded_text}"
                    st.markdown(
                        f"<a class=\"whatsapp-share\" href=\"{whatsapp_link}\" target=\"_blank\">📤 Share on WhatsApp</a>",
                        unsafe_allow_html=True
                    )

                else:
                    try:
                        err = response.json().get('error', response.text)
                    except ValueError:
                        err = response.text or 'No response body.'
                    st.error(f"Failed to publish post: {response.status_code} – {err}")

            except requests.exceptions.RequestException as e:
                st.error(f"Request error: {e}")


if __name__ == "__main__":
    main()