import json
import tempfile
import unittest
from pathlib import Path
from unittest.mock import Mock, patch

from copienator import EvaluationWorkspace, atomic_write_json, read_json
from copienator.commands import correction


class ConfirmedLabelRegradingTests(unittest.TestCase):
    def setUp(self):
        temporary = tempfile.TemporaryDirectory()
        self.addCleanup(temporary.cleanup)
        self.addCleanup(correction.stop_requested.clear)
        self.root = Path(temporary.name)
        self.workspace = EvaluationWorkspace(self.root)
        (self.root / 'labels').write_text('Ex 1\nEx 2\n')
        self.group = self.root / 'Par label/Ex 1/Group_1.jpg'
        self.group.parent.mkdir(parents=True)
        self.group.touch()
        atomic_write_json(self.group.with_suffix('.json'), [
            ['02', 0, 400, 1], ['01', 450, 950, .5],
        ])
        self.pdf = self.root / 'Copies/Copie01/Ex 1.pdf'
        self.pdf.parent.mkdir(parents=True)
        self.pdf.write_bytes(b'original answer')
        args = correction.build_parser().parse_args([str(self.root)])
        correction.configure_runtime(self.workspace, [(str(self.group), 'Ex 1')], args, api_client=Mock())
        self.original = [
            {'id': '02', 'result': {'score': 4, 'feedback': [], 'error': ''}},
            {'id': '01', 'result': {'score': 0, 'error': 'wrong-label',
                                   'feedback': [{'text': 'Wrong question', 'box_2d': None}]}},
        ]
        self.regraded = [{'id': '01', 'result': {
            'score': 2.5, 'error': '', 'feedback': [
                {'text': 'Monotonicity is missing', 'box_2d': [100, 200, 300, 400]},
            ],
        }}]

    def process(self, responses):
        with (
            patch.object(correction.prompting, 'generate_request', return_value=([], {})),
            patch.object(correction.prompting, 'get_single_image_bytes', return_value=b'image'),
            patch.object(correction, 'call_gemini_with_retries', side_effect=responses) as call,
        ):
            tasks = correction.process_single_task((str(self.group), 'Ex 1'), json.dumps(self.original))
        return tasks, call

    def test_confirmed_label_replaces_rejection_and_maps_boxes_to_original_group(self):
        tasks, calls = self.process(['Ex 1', json.dumps(self.regraded)])
        self.assertEqual(tasks, [])
        self.assertEqual(calls.call_count, 2)
        self.assertEqual(correction.errors_summary, [])
        saved = read_json(self.workspace.correction_file)['Ex 1'][0]
        self.assertEqual(saved[0], self.original[0])
        result = saved[1]['result']
        self.assertEqual(result['score'], 2.5)
        self.assertEqual(result['error'], '')
        self.assertEqual(result['feedback'][0]['text'], 'Monotonicity is missing')
        box = result['feedback'][0]['box_2d']
        self.assertAlmostEqual(box[0], 500 * 1000 / 950)
        self.assertAlmostEqual(box[2], 600 * 1000 / 950)
        self.assertEqual([box[1], box[3]], [100, 200])
        self.assertEqual(self.pdf.read_bytes(), b'original answer')
        self.assertEqual(correction.completed_tasks, [(str(self.group), 'Ex 1')])

    def test_invalid_regrading_never_publishes_stale_zero_or_marks_group_complete(self):
        for response in (
            [],
            [{'id': '02', 'result': self.regraded[0]['result']}],
            [self.regraded[0], self.regraded[0]],
            [self.original[1]],
            [{'id': '01', 'result': {'error': ''}}],
        ):
            with self.subTest(response=response):
                self.process(['Ex 1', json.dumps(response)])
                self.assertFalse(self.workspace.correction_file.exists())
                self.assertEqual(correction.completed_tasks, [])
                self.assertEqual(correction.results['Ex 1'], [])
                self.assertEqual(self.pdf.read_bytes(), b'original answer')

    def test_interrupted_regrading_keeps_wrong_label_in_pending_response(self):
        with self.assertRaises(correction.CorrectionStopRequested):
            self.process(['Ex 1', correction.CorrectionStopRequested()])
        pending = read_json(self.workspace.correction_pending_responses_file)
        self.assertEqual(json.loads(pending[str(self.group)]), self.original)
        self.assertFalse(self.workspace.correction_file.exists())
        self.process(['Ex 1', json.dumps(self.regraded)])
        self.assertEqual(read_json(self.workspace.correction_pending_responses_file), {})
        self.assertEqual(read_json(self.workspace.correction_file)['Ex 1'][0][1]['result']['score'], 2.5)

    def test_empty_answer_from_regrading_uses_normal_empty_answer_handling(self):
        response = [{'id': '01', 'result': {'score': 0, 'feedback': [], 'error': 'empty-answer'}}]
        self.process(['Ex 1', json.dumps(response)])
        result = read_json(self.workspace.correction_file)['Ex 1'][0][1]['result']
        self.assertEqual(result['error'], 'empty-answer')
        self.assertEqual(result['suffix'], '_old')
        self.assertFalse(self.pdf.exists())
        self.assertEqual(self.pdf.with_name('Ex 1_old.pdf').read_bytes(), b'original answer')

    def test_different_label_keeps_existing_move_behavior(self):
        (self.pdf.parent / 'Ex 2.pdf').touch()
        _, calls = self.process(['Ex 2'])
        self.assertEqual(calls.call_count, 1)
        result = read_json(self.workspace.correction_file)['Ex 1'][0][1]['result']
        self.assertEqual(result['error'], 'wrg-lbl:Ex 2?')
        self.assertEqual(result['delayed'], [['wrong-label', 'Ex 2']])

    def test_additional_answer_from_regrading_still_gets_resolved(self):
        (self.pdf.parent / 'Ex 2.pdf').touch()
        self.regraded[0]['result']['error'] = 'additional-answer'
        _, calls = self.process(['Ex 1', json.dumps(self.regraded), '["Ex 1", "Ex 2"]'])
        self.assertEqual(calls.call_count, 3)
        result = read_json(self.workspace.correction_file)['Ex 1'][0][1]['result']
        self.assertEqual(result['score'], 2.5)
        self.assertEqual(result['delayed'], [['add-label', 'Ex 2']])