"""Integration tests: full follow-up flow with real overdue invoices."""

from datetime import date, timedelta
from odoo.tests.common import TransactionCase
from odoo.tests import tagged


@tagged('post_install', '-at_install', 'integration')
class TestFollowupEngineIntegration(TransactionCase):

    def setUp(self):
        super().setUp()
        self.engine = self.env['fusion.followup.engine']
        self.partner = self.env['res.partner'].create({
            'name': 'Integration Partner', 'email': 'integ@test.local',
        })
        for seq, name, days, tone in [(801, 'Test Reminder', 7, 'gentle'),
                                      (802, 'Test Warning', 30, 'firm'),
                                      (803, 'Test Legal', 60, 'legal')]:
            self.env['fusion.followup.level'].create({
                'name': name, 'sequence': seq, 'delay_days': days, 'tone': tone,
            })

        line = self.env['account.move.line'].search([
            ('parent_state', '=', 'posted'),
            ('account_id.account_type', '=', 'asset_receivable'),
            ('reconciled', '=', False),
            ('amount_residual', '>', 0),
        ], limit=1)
        if not line:
            self.skipTest("No posted unreconciled receivable lines in test DB")
        line.write({
            'partner_id': self.partner.id,
            'date_maturity': date.today() - timedelta(days=20),
        })

    def test_get_overdue_finds_lines(self):
        result = self.engine.get_overdue_for_partner(self.partner)
        self.assertGreater(result['overdue_line_count'], 0)
        self.assertGreater(result['aging']['total_overdue_amount'], 0)

    def test_compute_level_picks_reminder_at_20_days(self):
        level = self.engine.compute_followup_level(self.partner)
        self.assertTrue(level)
        self.assertGreater(level.delay_days, 0)

    def test_send_followup_creates_run(self):
        result = self.engine.send_followup_email(self.partner, force=True)
        self.assertIn(result['status'], ('sent', 'manual_review'))
        if 'run_id' in result:
            run = self.env['fusion.followup.run'].browse(result['run_id'])
            self.assertEqual(run.partner_id, self.partner)

    def test_pause_blocks_send_unless_force(self):
        self.engine.pause_followup(self.partner,
                                   until_date=date.today() + timedelta(days=30))
        result = self.engine.send_followup_email(self.partner)
        self.assertTrue(result['status'].startswith('paused'))
        result_force = self.engine.send_followup_email(self.partner, force=True)
        self.assertIn(result_force['status'], ('sent', 'manual_review'))

    def test_history_grows_with_each_send(self):
        Run = self.env['fusion.followup.run']
        before = Run.search_count([('partner_id', '=', self.partner.id)])
        self.engine.send_followup_email(self.partner, force=True)
        after = Run.search_count([('partner_id', '=', self.partner.id)])
        self.assertGreater(after, before)

    def test_text_cache_used_on_repeat_call(self):
        Cache = self.env['fusion.followup.text.cache']
        self.engine.send_followup_email(self.partner, force=True)
        cache_count_after_first = Cache.search_count([('partner_id', '=', self.partner.id)])
        self.engine.send_followup_email(self.partner, force=True)
        cache_count_after_second = Cache.search_count([('partner_id', '=', self.partner.id)])
        self.assertEqual(cache_count_after_first, cache_count_after_second,
            "Repeat send with same params should not create new cache row")