"""FCC Form 499-Q Quarterly Filing Handler.

Simplified filing: the client submits quarterly revenue via the intake page,
and this handler files it at USAC E-File. Revenue calculations are minimal
compared to the 499-A — just four revenue buckets projected for the quarter.

The 499-Q determines quarterly USF contribution payments.
"""
from __future__ import annotations

import logging
import os
from datetime import datetime

from .base_handler import BaseComplianceHandler

logger = logging.getLogger("workers.services.form_499q")


class Form499QHandler(BaseComplianceHandler):
    SERVICE_SLUG = "fcc-499q"
    SERVICE_NAME = "FCC Form 499-Q Quarterly Filing"

    async def process(self, order_data: dict) -> dict | None:
        order_number = order_data.get("order_number", "")
        entity = order_data.get("entity", {})
        intake_data = order_data.get("intake_data", {})

        if not intake_data.get("intake_completed"):
            logger.info(
                "Form499QHandler: %s intake not completed — waiting for client",
                order_number,
            )
            self._create_admin_todo(
                order_number,
                f"499-Q {intake_data.get('quarter', '?')} for "
                f"{entity.get('legal_name', '?')} — awaiting client intake. "
                f"Due {intake_data.get('due_date', '?')}.",
            )
            return None

        quarter = intake_data.get("quarter", "?")
        revenue = intake_data.get("revenue", {})
        filer_id = intake_data.get("filer_id_499") or entity.get("filer_id_499", "")
        frn = intake_data.get("frn") or entity.get("frn", "")

        logger.info(
            "Form499QHandler: processing %s %s for %s (total: $%.2f)",
            order_number, quarter,
            entity.get("legal_name", "?"),
            revenue.get("total", 0),
        )

        # Create admin todo with filing instructions
        # (Full Playwright automation for USAC E-File 499-Q TBD)
        self._create_admin_todo(
            order_number,
            f"FILE 499-Q {quarter} for {entity.get('legal_name', '?')} "
            f"(FRN: {frn}, Filer ID: {filer_id})\n\n"
            f"Revenue:\n"
            f"  Carrier's Carrier Interstate: ${revenue.get('carriers_carrier_interstate', 0):.2f}\n"
            f"  Carrier's Carrier Intrastate: ${revenue.get('carriers_carrier_intrastate', 0):.2f}\n"
            f"  End-User Interstate: ${revenue.get('end_user_interstate', 0):.2f}\n"
            f"  End-User Intrastate: ${revenue.get('end_user_intrastate', 0):.2f}\n"
            f"  Total: ${revenue.get('total', 0):.2f}\n\n"
            f"Due: {intake_data.get('due_date', '?')}\n"
            f"Parent 499-A: {intake_data.get('parent_499a_order', '?')}\n\n"
            f"File at: https://forms.universalservice.org/",
        )

        # Send confirmation email to client
        self._send_confirmation_email(
            to=entity.get("contact_email") or order_data.get("customer_email", ""),
            entity_name=entity.get("legal_name", ""),
            order_number=order_number,
            quarter=quarter,
            due_date=intake_data.get("due_date", ""),
        )

        return {"status": "submitted_for_filing"}

    def _send_confirmation_email(
        self, to: str, entity_name: str, order_number: str,
        quarter: str, due_date: str,
    ) -> None:
        if not to:
            return
        try:
            import smtplib
            from email.mime.multipart import MIMEMultipart
            from email.mime.text import MIMEText

            subject = f"499-Q {quarter} Filing Received — {entity_name}"
            html = f"""
            <div style="font-family:Inter,sans-serif;max-width:600px;margin:0 auto;color:#1f2937">
              <div style="background:#1e3a5f;padding:16px 24px;border-radius:8px 8px 0 0">
                <h2 style="color:#fff;margin:0;font-size:16px">Form 499-Q {quarter} — Filing Received</h2>
              </div>
              <div style="padding:24px;border:1px solid #e5e7eb;border-top:none;border-radius:0 0 8px 8px">
                <p>Your FCC Form 499-Q quarterly revenue data for <strong>{entity_name}</strong>
                ({quarter}, due {due_date}) has been received.</p>
                <p>We'll file this with USAC E-File and send you a confirmation with your
                filing reference number once complete.</p>
                <p style="font-size:13px;color:#6b7280;margin-top:1rem">
                  Order: {order_number}<br>
                  Questions? Reply to this email or contact
                  <a href="mailto:ops@performancewest.net">ops@performancewest.net</a>.
                </p>
              </div>
            </div>
            """
            msg = MIMEMultipart("alternative")
            msg["From"] = os.environ.get("SMTP_FROM", "Performance West <noreply@performancewest.net>")
            msg["To"] = to
            msg["Subject"] = subject
            msg.attach(MIMEText(html, "html"))

            with smtplib.SMTP(
                os.environ.get("SMTP_HOST", "co.carrierone.com"),
                int(os.environ.get("SMTP_PORT", "587")),
                timeout=30,
            ) as s:
                s.starttls()
                s.login(
                    os.environ.get("SMTP_USER", ""),
                    os.environ.get("SMTP_PASS", ""),
                )
                s.send_message(msg)
        except Exception as exc:
            logger.warning("499-Q confirmation email failed: %s", exc)