# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1
"""Migrate owner contact settings from email/name strings to a partner ref.

Pre-19.0.2.1.0, fusion_helpdesk stored two ICP keys:
  fusion_helpdesk.owner_email
  fusion_helpdesk.owner_name

19.0.2.1.0 replaces them with a single Many2one to res.partner exposed
as a partner-id string in:
  fusion_helpdesk.owner_partner_id

This script auto-resolves the email to an existing res.partner (best
effort — exact case-insensitive match), so admins don't have to re-pick
the owner contact after the upgrade. The old keys are then deleted to
avoid stale-config confusion. If no matching partner is found, the
owner_partner_id is left blank — admin reconfigures via Settings.
"""
import logging

_logger = logging.getLogger(__name__)


def migrate(cr, version):
    cr.execute(
        "SELECT value FROM ir_config_parameter "
        "WHERE key = 'fusion_helpdesk.owner_email'"
    )
    row = cr.fetchone()
    email = (row[0] or '').strip().lower() if row else ''
    if not email:
        _logger.info(
            'fusion_helpdesk: no legacy owner_email to migrate, skipping.'
        )
        _purge_legacy_keys(cr)
        return
    # Exact (lowercased) match on res_partner.email. The legacy ICP value
    # was free text — could be uppercase, have trailing spaces, etc. —
    # so normalise both sides. If multiple partners share the email,
    # pick the oldest (lowest id) — same convention used elsewhere in
    # the customer-followup partner backfill.
    cr.execute(
        "SELECT id, name FROM res_partner "
        "WHERE lower(email) = %s "
        "ORDER BY id ASC LIMIT 1",
        (email,),
    )
    match = cr.fetchone()
    if not match:
        _logger.warning(
            'fusion_helpdesk: legacy owner_email %s does not match any '
            'res.partner — owner_partner_id left blank, admin must '
            're-pick under Settings → Fusion Helpdesk → Owner Approval.',
            email,
        )
        _purge_legacy_keys(cr)
        return
    partner_id, partner_name = match
    cr.execute(
        "INSERT INTO ir_config_parameter (key, value) "
        "VALUES ('fusion_helpdesk.owner_partner_id', %s) "
        "ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value",
        (str(partner_id),),
    )
    _logger.info(
        'fusion_helpdesk: migrated owner_email "%s" → res.partner #%s '
        '("%s"). Legacy keys purged.', email, partner_id, partner_name,
    )
    _purge_legacy_keys(cr)


def _purge_legacy_keys(cr):
    """Delete the obsolete owner_email / owner_name ICP rows so a future
    reader doesn't trip over stale config. Safe — the new partner_id key
    is the only source of truth after this migration."""
    cr.execute(
        "DELETE FROM ir_config_parameter "
        "WHERE key IN ('fusion_helpdesk.owner_email', "
        "             'fusion_helpdesk.owner_name')"
    )