import gradio as gr
from newsletter import generate_newsletter
from mcp_client import DEFAULT_TOPICS
from email_client import send_email_via_mcp
import os
import requests

# 🔄 Load subscribers from your Django server on PythonAnywhere
def get_subscribers_from_django():
    try:
        res = requests.get("https://davebohnert.pythonanywhere.com/daveblog/api/subscribers/")
        res.raise_for_status()
        data = res.json()
        return data.get("emails", [])
    except Exception as e:
        print("❌ Error fetching subscribers from Django:", e)
        return []

# 🧠 Prepare newsletter content
def prepare_inputs(topic_input, region, hours):
    if topic_input.strip():
        topics = [t.strip() for t in topic_input.split(",") if t.strip()]
    else:
        topics = DEFAULT_TOPICS

    markdown_text, md_path, pdf_path = generate_newsletter(topics, region, hours)

    md_path = os.path.relpath(md_path, start=os.getcwd())
    pdf_path = os.path.relpath(pdf_path, start=os.getcwd())

    return markdown_text, md_path, pdf_path

# ✉️ Send newsletter via email with fallback to subscriber list
def send_newsletter_email(markdown_text, subject, recipient, sender_email=None, smtp_password=None):
    if recipient.strip():
        bcc_list = [r.strip() for r in recipient.split(",") if r.strip()]
    else:
        bcc_list = get_subscribers_from_django()
        if not bcc_list:
            raise ValueError("No recipients provided and no fallback subscribers found.")

    smtp_login = sender_email or os.getenv("DEFAULT_SENDER_EMAIL", "dave.bohnert77@gmail.com")
    visible_sender = f"DataDave Newsletter <{smtp_login}>"  # ✅ Only a display name

    smtp_password = smtp_password or os.getenv("DEFAULT_SMTP_PASSWORD", "jqgi udjp bgxx gynk")
    smtp_host = os.getenv("SMTP_HOST", "smtp.gmail.com")
    smtp_port = int(os.getenv("SMTP_PORT", "587"))
    subject = subject or "📰 AI Newsletter"

    return send_email_via_mcp(
        markdown_content=markdown_text,
        subject=subject,
        recipient=bcc_list,
        sender_email=visible_sender,
        smtp_login=smtp_login,
        smtp_password=smtp_password,
        smtp_host=smtp_host,
        smtp_port=smtp_port,
    )


# 🌐 Gradio UI
with gr.Blocks() as demo:
    gr.Markdown("## 🗞️ EU AI Regulation Weekly")

    with gr.Row():
        topic_input = gr.Textbox(
            label="Topics (comma-separated)", 
            value="",
            placeholder="e.g. AI, GDPR, AI Act, AI regulation, DORA, NIS2..."
        )
        region = gr.Textbox(label="Region", value="Europe")
        hours = gr.Number(label="Lookback Hours", value=168)

    with gr.Row():
        preview = gr.Textbox(label="Newsletter Preview", lines=30)
        md_file = gr.File(label="📄 Download Markdown")
        pdf_file = gr.File(label="🖨️ Download PDF", file_types=[".pdf"], interactive=True)

    with gr.Row():
        recipient_email = gr.Textbox(
            label="📩 Recipient Email(s)",
            placeholder="Leave empty to send to all subscribers"
        )
        sender_email = gr.Textbox(label="📤 Sender Email", placeholder="your.email@gmail.com")
        smtp_password = gr.Textbox(label="🔐 SMTP Password", type="password")
        subject = gr.Textbox(label="📝 Subject", value="📰 Your AI Newsletter")

    btn = gr.Button("📬 Generate Newsletter")
    btn.click(
        fn=prepare_inputs,
        inputs=[topic_input, region, hours],
        outputs=[preview, md_file, pdf_file],
        preprocess=False
    )

    send_btn = gr.Button("✉️ Send Newsletter via Email (BCC)")
    send_btn.click(
        fn=send_newsletter_email,
        inputs=[preview, subject, recipient_email, sender_email, smtp_password],
        outputs=[]
    )

#demo.launch()
if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=int(os.environ.get("PORT", 7860)))
    print("✅ App has started on port", os.environ.get("PORT", 7860))