"""Self-contained tests for Code4History scaffold's Python tooling."""
from __future__ import annotations
import importlib.util
from pathlib import Path
import shutil
import sys
import tempfile
import unittest

ROOT=Path(__file__).resolve().parents[1]

def load(name:str):
    path=ROOT/'tools'/f'{name}.py'
    spec=importlib.util.spec_from_file_location(name,path)
    module=importlib.util.module_from_spec(spec);sys.modules[name]=module
    spec.loader.exec_module(module)
    return module

new_item=load('new_item'); validate=load('validate')

class ScaffoldTests(unittest.TestCase):
    def test_real_scaffold_structure(self):
        errors,_=validate.check(ROOT)
        self.assertEqual(errors,[])
    def test_creation_numbering_and_references(self):
        with tempfile.TemporaryDirectory() as tmp:
            p=Path(tmp)
            (p/'10_templates').mkdir()
            shutil.copy(ROOT/'10_templates/primary.md',p/'10_templates/primary.md')
            shutil.copy(ROOT/'10_templates/evidence.md',p/'10_templates/evidence.md')
            id1, path1=new_item.create(p,'primary','first-source')
            id2, _=new_item.create(p,'primary','second-source')
            self.assertEqual((id1,id2),('SRC-P-0001','SRC-P-0002'))
            self.assertTrue(path1.read_text().startswith('---\nid: SRC-P-0001'))
            with self.assertRaises(ValueError): new_item.create(p,'evidence','../bad')
    def test_invalid_link_is_detected(self):
        with tempfile.TemporaryDirectory() as tmp:
            p=Path(tmp)
            shutil.copytree(ROOT,p/'code4history')
            q=p/'code4history'
            _,path=new_item.create(q,'evidence','unverifiable-note')
            text=path.read_text().replace('source_ids: []','source_ids: [SRC-P-9999]')
            path.write_text(text)
            errors,_=validate.check(q)
            self.assertTrue(any('SRC-P-9999' in e for e in errors))

if __name__=='__main__':unittest.main()