import json
import re
import unittest
import os
from unittest.mock import patch
from pathlib import Path
from src.config_params import build_config_params, config_params_source, build_config_params_with_meta, GAP
from src.build_config_client import BuildConfigError
from scripts.dry_run import _render


class TestConfigParams(unittest.TestCase):
    def setUp(self):
        env = patch.dict(os.environ, {}, clear=True)
        env.start()
        self.addCleanup(env.stop)

    def test_source_selection_and_failure(self):
        # No token → sample, no network
        with patch('src.config_params.resolve_token', side_effect=ValueError), patch('src.config_params.build_config') as client:
            self.assertEqual(config_params_source(), 'sample')
            yaml, meta = build_config_params_with_meta('壁砺')
            self.assertEqual(meta['auth'], 'missing')
            self.assertEqual(meta['configParams_source'], 'sample')
            client.assert_not_called()
        # Token alone → prefer build-config (kickoff default)
        for gpu, enum in [('壁砺', 'Biren_166m'), ('壁砺166M', 'Biren_166m'),
                          ('Biren_166m', 'Biren_166m'), ('曦望', 'Sunrise_pt-200-x1'),
                          ('曦望 S2', 'Sunrise_pt-200-x1'), ('Sunrise_pt-200-x1', 'Sunrise_pt-200-x1')]:
            with self.subTest(gpu=gpu), patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config', return_value='api: yaml') as client:
                self.assertEqual(config_params_source(), 'build-config')
                yaml, meta = build_config_params_with_meta(gpu)
                self.assertEqual(yaml, 'api: yaml')
                self.assertEqual(meta['configParams_source'], 'build-config')
                self.assertEqual(meta['auth'], 'ok')
                client.assert_called_once_with(enum, 'vllm', 'text-generation')
        # Failure → sample + GAP reason
        with patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config', side_effect=BuildConfigError('transport/timeout')):
            yaml, meta = build_config_params_with_meta('壁砺')
            self.assertEqual(meta['configParams_source'], 'sample')
            self.assertEqual(meta['configParams_fallback_reason'], 'GAP: transport/timeout')
            self.assertIn('max_model_len: 4096', yaml)
        # Forced build-config also soft-falls back in with_meta
        with patch.dict(os.environ, {'CONFIG_PARAMS_SOURCE': 'build-config'}), patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config', side_effect=BuildConfigError('transport/timeout')):
            yaml, meta = build_config_params_with_meta('壁砺')
            self.assertEqual(meta['configParams_fallback_reason'], 'GAP: transport/timeout')
        # Unmapped GPU → no API call
        for gpu in ('天垓150', '智铠 mrv-100', 'MetaX_c-500', '<GPU>', None):
            with patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config') as client:
                _, meta = build_config_params_with_meta(gpu)
                self.assertIn('GAP: gpu enum unmapped', meta['configParams_fallback_reason'])
                client.assert_not_called()
        # Force sample even with token
        with patch.dict(os.environ, {'CONFIG_PARAMS_SOURCE': 'sample'}), patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config') as client:
            self.assertEqual(config_params_source(), 'sample')
            build_config_params('壁砺')
            client.assert_not_called()

    def test_report_api_failure_metadata(self):
        with patch('src.config_params.resolve_token', return_value='synthetic'), patch('src.config_params.build_config', side_effect=BuildConfigError('transport/timeout')):
            report = _render([{'model_address': 'org/a', 'try_next_gpus': ['壁砺'],
                               'foothold_class': 'verified_reuse', 'evidence_source': 'pending-foothold',
                               'no_download': False}], 'test', 'fixture')
        for value in ('foothold_class=verified_reuse', 'evidence_source=pending-foothold', 'no_download=False',
                      'configParams_source=sample', 'configParams_fallback_reason=GAP: transport/timeout'):
            self.assertIn(value, report)

    def test_official_sample_exact(self):
        scrape = Path('/workspace/modelhub-adapt/logs/api-docs-scrape-2026-10-16.md')
        if scrape.is_file():
            body = json.loads(re.search(r'```json\n(.*?)\n```', scrape.read_text(), re.S)[1])
            with patch('src.config_params.resolve_token', side_effect=ValueError):
                self.assertEqual(build_config_params(), body['configParams'])
        with patch('src.config_params.resolve_token', side_effect=ValueError):
            self.assertIn('max_model_len: 4096', build_config_params())
            self.assertIn('framework: vllm', build_config_params())
        self.assertIn('NOT production-ready', GAP)

    def test_report_draft_and_gap(self):
        with patch('src.config_params.resolve_token', side_effect=ValueError):
            report = _render([{'model_address': 'org/a', 'try_next_gpus': ['壁砺']}], 'test', 'fixture')
        for value in ('代提候选 / 需 Victor 确认', 'configParams source', 'configParams_source=sample', 'foothold_class=unknown', 'evidence_source=GAP', 'no_download=False', 'GAP:', 'truncated', 'max_model_len: 4096', 'perf_order=unset', 'order_source=experience'):
            self.assertIn(value, report)