# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1
"""Pure-helper tests for fusion_helpdesk_central.utils.

No Odoo env, no network — these run in any environment with `markupsafe`
installed. Mirrors the pattern in fusion_helpdesk/tests/test_utils.py.
"""
from unittest.mock import patch

from odoo.tests import TransactionCase, tagged

from odoo.addons.fusion_helpdesk_central.utils import (
    SUMMARY_PROMPT,
    OPENAI_PROMPT_MAX_CHARS,
    build_summary_prompt,
    call_openai_chat,
    format_engagement_chatter,
    truncate_for_openai,
)


@tagged('post_install', '-at_install', 'fusion_helpdesk_central')
class TestBuildSummaryPrompt(TransactionCase):

    def test_includes_title_description_and_messages(self):
        prompt = build_summary_prompt(
            'My ticket',
            'Detailed description here',
            [{'author': 'Alice', 'date': '2026-05-27 10:00:00',
              'body_plain': 'first reply'}],
        )
        self.assertIn('My ticket', prompt)
        self.assertIn('Detailed description here', prompt)
        self.assertIn('Alice', prompt)
        self.assertIn('first reply', prompt)

    def test_empty_messages_becomes_explicit_marker(self):
        # The model needs to know "no replies yet" — a blank section would
        # invite hallucination.
        prompt = build_summary_prompt('t', 'd', [])
        self.assertIn('(no replies yet)', prompt)

    def test_empty_title_and_description_use_fallbacks(self):
        prompt = build_summary_prompt('', '', [])
        self.assertIn('(untitled)', prompt)
        self.assertIn('(no description)', prompt)

    def test_empty_message_body_is_marked_not_dropped(self):
        prompt = build_summary_prompt('t', 'd', [
            {'author': 'A', 'date': 'X', 'body_plain': ''},
        ])
        # An empty body must still produce a line so author + date context
        # survives; '(empty)' marker keeps the model honest.
        self.assertIn('(empty)', prompt)

    def test_findings_included_in_prompt(self):
        # Findings is the support engineer's analysis — must reach OpenAI.
        prompt = build_summary_prompt(
            't', 'd', [], findings='Scope is small. ~2h of work.',
        )
        self.assertIn('Scope is small. ~2h of work.', prompt)

    def test_findings_absent_uses_explicit_marker(self):
        # Empty findings collapses to an explicit marker so the model
        # doesn't read a blank section as "missing".
        prompt = build_summary_prompt('t', 'd', [], findings='')
        self.assertIn('none provided', prompt)


@tagged('post_install', '-at_install', 'fusion_helpdesk_central')
class TestTruncateForOpenAI(TransactionCase):

    def test_no_truncation_when_under_limit(self):
        prompt = 'x' * 100
        self.assertEqual(truncate_for_openai(prompt, max_chars=200), prompt)

    def test_truncation_appends_marker_and_respects_cap(self):
        prompt = 'x' * 500
        out = truncate_for_openai(prompt, max_chars=200)
        self.assertLessEqual(len(out), 200)
        self.assertIn('truncated', out.lower())

    def test_default_cap_is_8000(self):
        # Regression guard — flipping this default has real $$ implications.
        self.assertEqual(OPENAI_PROMPT_MAX_CHARS, 8000)


@tagged('post_install', '-at_install', 'fusion_helpdesk_central')
class TestFormatEngagementChatter(TransactionCase):

    def test_approve_without_comment(self):
        out = str(format_engagement_chatter('approved', 'Kris'))
        self.assertIn('Approved', out)
        self.assertIn('Kris', out)
        self.assertIn('✓', out)
        # No blockquote when no comment.
        self.assertNotIn('blockquote', out)

    def test_reject_with_comment(self):
        out = str(format_engagement_chatter(
            'rejected', 'Kris', comment='not in scope this quarter'))
        self.assertIn('Rejected', out)
        self.assertIn('✗', out)
        self.assertIn('blockquote', out)
        self.assertIn('not in scope this quarter', out)

    def test_comment_html_escaped(self):
        # XSS guard: a malicious comment must not inject script tags.
        out = str(format_engagement_chatter(
            'approved', 'Kris', comment='<script>alert(1)</script>'))
        self.assertNotIn('<script>', out)
        self.assertIn('&lt;script&gt;', out)

    def test_owner_name_html_escaped(self):
        # Same XSS guard on the owner name path.
        out = str(format_engagement_chatter(
            'approved', '<b>Pwn</b>'))
        self.assertNotIn('<b>Pwn</b>', out)
        self.assertIn('&lt;b&gt;', out)

    def test_missing_owner_name_falls_back(self):
        out = str(format_engagement_chatter('approved', None))
        self.assertIn('the owner', out)

    def test_invalid_decision_raises(self):
        # Typo upstream should fail loud, not silently post a malformed line.
        with self.assertRaises(ValueError):
            format_engagement_chatter('maybe', 'Kris')


@tagged('post_install', '-at_install', 'fusion_helpdesk_central')
class TestCallOpenAIChat(TransactionCase):
    """OpenAI client unit tests — mock urlopen, never hit the network."""

    def test_empty_api_key_returns_empty_string(self):
        # No key configured? Don't even try to call OpenAI.
        self.assertEqual(call_openai_chat('', 'gpt-4o-mini', 'hi'), '')

    def test_empty_prompt_returns_empty_string(self):
        self.assertEqual(call_openai_chat('sk-x', 'gpt-4o-mini', ''), '')

    def test_happy_path_returns_message_content(self):
        fake_response = type('R', (), {})()
        fake_response.read = lambda: (
            b'{"choices":[{"message":{"content":"bullet one\\nbullet two"}}]}'
        )
        fake_response.__enter__ = lambda s: s
        fake_response.__exit__ = lambda *a: None
        with patch(
            'odoo.addons.fusion_helpdesk_central.utils.urllib.request.urlopen',
            return_value=fake_response,
        ):
            out = call_openai_chat('sk-x', 'gpt-4o-mini', 'prompt')
        self.assertEqual(out, 'bullet one\nbullet two')

    def test_network_error_returns_empty(self):
        # All exceptions must collapse to '' so the wizard's fallback fires.
        import urllib.error
        with patch(
            'odoo.addons.fusion_helpdesk_central.utils.urllib.request.urlopen',
            side_effect=urllib.error.URLError('boom'),
        ):
            self.assertEqual(call_openai_chat('sk-x', 'm', 'p'), '')

    def test_http_error_returns_empty(self):
        import urllib.error
        with patch(
            'odoo.addons.fusion_helpdesk_central.utils.urllib.request.urlopen',
            side_effect=urllib.error.HTTPError(
                'url', 429, 'rate limited', {}, None,
            ),
        ):
            self.assertEqual(call_openai_chat('sk-x', 'm', 'p'), '')

    def test_malformed_json_returns_empty(self):
        fake_response = type('R', (), {})()
        fake_response.read = lambda: b'not json at all'
        fake_response.__enter__ = lambda s: s
        fake_response.__exit__ = lambda *a: None
        with patch(
            'odoo.addons.fusion_helpdesk_central.utils.urllib.request.urlopen',
            return_value=fake_response,
        ):
            self.assertEqual(call_openai_chat('sk-x', 'm', 'p'), '')

    def test_empty_choices_returns_empty(self):
        fake_response = type('R', (), {})()
        fake_response.read = lambda: b'{"choices":[]}'
        fake_response.__enter__ = lambda s: s
        fake_response.__exit__ = lambda *a: None
        with patch(
            'odoo.addons.fusion_helpdesk_central.utils.urllib.request.urlopen',
            return_value=fake_response,
        ):
            self.assertEqual(call_openai_chat('sk-x', 'm', 'p'), '')


@tagged('post_install', '-at_install', 'fusion_helpdesk_central')
class TestPromptConstant(TransactionCase):

    def test_summary_prompt_has_required_placeholders(self):
        # The wizard calls .format(name=, description_plain=, messages_plain=)
        # — silently dropping any of these would yield a useless prompt.
        for placeholder in ('{name}', '{description_plain}', '{messages_plain}'):
            self.assertIn(placeholder, SUMMARY_PROMPT)