"""Carrier Close-Out — Trucking Wrap-Up workflow.

Done-for-you shutdown of a motor carrier. Orchestrates the sequential
wind-down as an admin-tracked workflow:
  final MCS-150 (Out of Business) -> revoke MC authority -> cancel UCR ->
  close IFTA/IRP + state accounts -> advise on insurance timing.

The `entity-dissolution` add-on (separate slug, same handler) dissolves the
LLC/Corp and files the final report — gated on a no-outstanding-liabilities
attestation.

Intake data:
  - entity_name / legal_name, dot_number, mc_number
  - phy_state / state, operating_states
"""
from __future__ import annotations

import json
import logging
import os

LOG = logging.getLogger("workers.services.carrier_closeout")


class CarrierCloseoutHandler:
    SERVICE_SLUG = "carrier-closeout"

    async def process(self, order_data: dict) -> list[str]:
        order_number = order_data.get("order_number", order_data.get("name", ""))
        return self.handle(order_data, order_number)

    def handle(self, order_data: dict, order_number: str) -> list[str]:
        intake = order_data.get("intake_data") or {}
        if isinstance(intake, str):
            intake = json.loads(intake)

        slug = order_data.get("service_slug", self.SERVICE_SLUG)
        name = intake.get("entity_name") or intake.get("legal_name") or "Unknown carrier"
        dot = intake.get("dot_number") or intake.get("usdot") or "N/A"
        state = intake.get("phy_state") or intake.get("state") or "N/A"
        LOG.info("[%s] Carrier close-out (%s) for %s (DOT %s)", order_number, slug, name, dot)

        if slug == "entity-dissolution":
            steps = [
                "Confirm NO outstanding lawsuits, liens, or judgments before dissolving (client attestation).",
                f"File Articles of Dissolution for {name} with the {state} Secretary of State.",
                "File final state report / franchise tax return; close state tax accounts.",
                "Notify IRS (final return, check the 'final' box); close the EIN if requested.",
            ]
            title = f"Entity Dissolution — {name} ({state})"
        else:
            steps = [
                f"File final MCS-150 marking carrier OUT OF BUSINESS — deactivate USDOT {dot}.",
                "Submit voluntary revocation of operating authority (MC) to FMCSA.",
                "Cancel UCR registration; confirm marked inactive (no next-year bill).",
                "Close IFTA account, file final quarterly return, retire decals.",
                f"Return IRP apportioned plates to base state ({state}); close the account.",
                "Close state-level accounts/permits (CA MCP/CARB, OR weight-mile, NY HUT, KY KYU, etc.) per operating states.",
                "Advise client on insurance cancellation timing (only AFTER authority is revoked).",
            ]
            title = f"Trucking Wrap-Up (Shutdown) — {name} (DOT {dot})"

        description = (
            f"Carrier: {name}\nUSDOT: {dot}\nMC: {intake.get('mc_number', 'N/A')}\n"
            f"Base state: {state}\nOperating states: {intake.get('operating_states', 'N/A')}\n\n"
            "Sequential wind-down steps:\n"
            + "\n".join(f"  {i + 1}. {s}" for i, s in enumerate(steps))
        )
        self._create_todo(order_number, intake, title, description, slug, priority="high")
        return [f"Close-out workflow queued: {title}"]

    def _create_todo(self, order_number, intake, title, description, slug, priority="normal"):
        try:
            import psycopg2
            conn = psycopg2.connect(os.environ.get("DATABASE_URL", ""))
            with conn.cursor() as cur:
                cur.execute(
                    """
                    INSERT INTO admin_todos (
                        title, category, priority, order_number, service_slug,
                        description, data, status
                    ) VALUES (%s, %s, %s, %s, %s, %s, %s, 'pending')
                    """,
                    (title, "filing", priority, order_number, slug, description, json.dumps(intake)),
                )
            conn.commit()
            conn.close()
        except Exception as exc:
            LOG.error("[%s] Failed to create close-out todo: %s", order_number, exc)