from flask_mail import Message
from flask import current_app
from app.extensions import mail
import pandas as pd
from io import BytesIO

def get_report_data():
    """
    Fetch and return loan summary data.
    """
    return [
        {"Type": "Disbursement", "Count": 45},
        {"Type": "Repayment", "Count": 32},
    ]
def send_report_email(report_data: list, recipients: list):
    """
    Sends an HTML + Excel report to the given email recipients.
    """
    df = pd.DataFrame(report_data)
    output = BytesIO()
    df.to_excel(output, index=False)
    output.seek(0)

    html_table = df.to_html(index=False, border=1)

    msg = Message(
        subject="Loan Report Summary",
        recipients=recipients,
        html=f"<h3>Loan Report Summary</h3>{html_table}",
    )
    msg.attach(
        "loan_report.xlsx",
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        output.read()
    )

    with current_app.app_context():
        mail.send(msg)

    return "Report email sent"