"""Cron handlers for fusion_accounting_followup.

Two scheduled jobs:
- Daily scan: walk every partner with an open overdue receivable line and
  call the engine to send/escalate where appropriate.
- Weekly risk refresh: recompute fusion_followup_risk_score on every
  partner with overdue.
"""

import logging
from datetime import date

from odoo import api, models

_logger = logging.getLogger(__name__)


class FusionFollowupCron(models.AbstractModel):
    _name = "fusion.followup.cron"
    _description = "Fusion Follow-up Cron Handlers"

    @api.model
    def _cron_daily_scan(self):
        """Scan every partner with overdue and send follow-ups when due."""
        engine = self.env['fusion.followup.engine']
        Line = self.env['account.move.line'].sudo()
        overdue_lines = Line.search([
            ('parent_state', '=', 'posted'),
            ('account_id.account_type', '=', 'asset_receivable'),
            ('reconciled', '=', False),
            ('amount_residual', '>', 0),
            ('date_maturity', '<', date.today()),
        ])
        partner_ids = list(set(overdue_lines.mapped('partner_id').ids))
        sent = 0
        skipped = 0
        for pid in partner_ids:
            partner = self.env['res.partner'].sudo().browse(pid)
            if not partner.exists():
                continue
            try:
                with self.env.cr.savepoint():
                    result = engine.send_followup_email(partner)
                    if result.get('status') == 'sent':
                        sent += 1
                    else:
                        skipped += 1
            except Exception as e:
                _logger.warning(
                    "Cron daily_scan failed for partner %s: %s", pid, e,
                )
                skipped += 1
        _logger.info(
            "Cron: scanned %d partners, sent %d, skipped %d",
            len(partner_ids), sent, skipped,
        )

    @api.model
    def _cron_risk_refresh(self):
        """Refresh fusion_followup_risk_score on every partner with overdue."""
        Partner = self.env['res.partner'].sudo()
        engine = self.env['fusion.followup.engine']
        Line = self.env['account.move.line'].sudo()
        partner_ids = list(set(Line.search([
            ('parent_state', '=', 'posted'),
            ('account_id.account_type', '=', 'asset_receivable'),
            ('reconciled', '=', False),
            ('amount_residual', '>', 0),
        ]).mapped('partner_id').ids))
        updated = 0
        for pid in partner_ids:
            partner = Partner.browse(pid)
            try:
                overdue = engine.get_overdue_for_partner(partner)
                partner.write({
                    'fusion_followup_risk_score': overdue['risk']['score'],
                    'fusion_followup_risk_band': overdue['risk']['band'],
                })
                updated += 1
            except Exception as e:
                _logger.warning(
                    "Risk refresh failed for partner %s: %s", pid, e,
                )
        _logger.info("Cron: refreshed risk on %d partners", updated)