"""
Odoo file export.

Odoo integration is still in development on your end, so for now we
generate a CSV of orders that fits your import template. This is a
placeholder column layout - once you know the exact columns your Odoo
import template expects, update ODOO_EXPORT_COLUMNS below (or tell me
and I'll adjust it) and the export will follow automatically.

When live Odoo API access is ready, this file is where an
OdooService(OrderService)-style push would go instead/alongside.
"""
from __future__ import annotations

import csv
from pathlib import Path
from typing import List

from app.models import Order

# (header label, function to get the value from an Order)
ODOO_EXPORT_COLUMNS = [
    ("Order Reference", lambda o: o.ticket_number or o.external_id),
    ("Company", lambda o: o.company),
    ("Source", lambda o: o.source),
    ("SKUs", lambda o: ", ".join(o.skus or [])),
    ("Status", lambda o: o.status),
    ("Summary", lambda o: o.summary),
    ("Source Created At", lambda o: o.source_created_at.isoformat() if o.source_created_at else ""),
]


def export_orders_to_csv(orders: List[Order], filepath: str) -> int:
    """Write orders to a CSV file. Returns the number of rows written."""
    path = Path(filepath)
    path.parent.mkdir(parents=True, exist_ok=True)

    with path.open("w", newline="", encoding="utf-8") as f:
        writer = csv.writer(f)
        writer.writerow([label for label, _ in ODOO_EXPORT_COLUMNS])
        for order in orders:
            writer.writerow([getter(order) for _, getter in ODOO_EXPORT_COLUMNS])

    return len(orders)