"""Local LLM compat test for followup_text_generator.

Auto-detects LM Studio (:1234) or Ollama (:11434), skips when absent."""

import socket

from odoo.tests.common import TransactionCase
from odoo.tests import tagged


def _server_reachable(host, port, timeout=1.0):
    try:
        with socket.create_connection((host, port), timeout=timeout):
            return True
    except (OSError, socket.timeout):
        return False


def _detect_local_llm():
    for host, port, default_model in [
        ('host.docker.internal', 1234, 'local-model'),
        ('host.docker.internal', 11434, 'llama3.1:8b'),
        ('localhost', 1234, 'local-model'),
        ('localhost', 11434, 'llama3.1:8b'),
    ]:
        if _server_reachable(host, port, timeout=0.5):
            return (f'http://{host}:{port}/v1', default_model)
    return (None, None)


@tagged('post_install', '-at_install', 'local_llm')
class TestLocalLLMFollowupText(TransactionCase):

    def setUp(self):
        super().setUp()
        self.base_url, self.model = _detect_local_llm()
        if not self.base_url:
            self.skipTest("No local LLM server detected")

    def test_followup_text_with_local_llm(self):
        params = self.env['ir.config_parameter'].sudo()
        prior = {k: params.get_param(k) for k in [
            'fusion_accounting.openai_base_url',
            'fusion_accounting.openai_model',
            'fusion_accounting.provider.followup_text',
        ]}
        params.set_param('fusion_accounting.openai_base_url', self.base_url)
        params.set_param('fusion_accounting.openai_model', self.model)
        params.set_param('fusion_accounting.openai_api_key', 'lm-studio')
        params.set_param('fusion_accounting.provider.followup_text', 'openai')

        try:
            from odoo.addons.fusion_accounting_followup.services.followup_text_generator import (
                generate_followup_text,
            )
            result = generate_followup_text(
                self.env, partner_name='Acme Corp',
                total_overdue=15000, currency_code='USD',
                longest_overdue_days=45, tone='firm',
                invoice_count=3,
                risk_drivers=['8/12 invoices paid late', 'Avg 30 days late'],
            )
            self.assertIn('subject', result)
            self.assertIn('body', result)
            self.assertIn('tone_used', result)
        finally:
            for k, v in prior.items():
                if v is not None:
                    params.set_param(k, v)