#!/usr/bin/env python3
"""Run reproducible source tests, examples, diagnostics and manifest checks."""
import argparse
import importlib.util
import json
from pathlib import Path
import re
import subprocess
import sys
import time


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('--output', help='write JSON report (default stdout)')
    args = parser.parse_args()
    root = Path(__file__).resolve().parents[1]
    commands = [('unit_tests', [sys.executable, '-m', 'unittest', 'discover', '-s', 'tests', '-v']),
                ('doctor_exact', [sys.executable, '-m', 'qzguard', 'doctor', '--backend', 'exact']),
                ('demo_exact', [sys.executable, 'START_HERE.py', 'demo', '--backend', 'exact']),
                ('stream_exact', [sys.executable, '-m', 'qzguard', 'check', '--bank',
                                  'examples/json/bank_exact.json', '--updates', 'examples/json/updates.jsonl'])]
    for example in ['weighted_policy', 'rounding_boundary', 'deletion_policy', 'prepared_bank', 'dynamic_policy']:
        commands.append((example, [sys.executable, f'examples/{example}.py']))
    numpy = importlib.util.find_spec('numpy') is not None
    if numpy:
        commands += [('doctor_filtered', [sys.executable, '-m', 'qzguard', 'doctor', '--backend', 'filtered']),
                     ('demo_filtered', [sys.executable, '-m', 'qzguard', 'demo', '--backend', 'filtered'])]
        for example in ['filtered_policy', 'reused_bank', 'fast_array_service']:
            commands.append((example, [sys.executable, f'examples/{example}.py']))
    if (root / 'MANIFEST_SHA256.json').is_file():
        commands.append(('manifest', [sys.executable, 'VERIFY_RELEASE.py']))
    checks = []
    for name, command in commands:
        start = time.perf_counter()
        result = subprocess.run(command, cwd=root, text=True, capture_output=True)
        record = {'name': name, 'exit_code': result.returncode,
                  'seconds': time.perf_counter() - start,
                  'stdout': result.stdout, 'stderr': result.stderr}
        if name == 'unit_tests':
            match = re.search(r'Ran (\d+) tests?', result.stderr)
            record['tests_run'] = int(match.group(1)) if match else None
        checks.append(record)
    report = {'version': (root / 'VERSION').read_text().strip(),
              'python': sys.version, 'numpy_available': numpy,
              'all_passed': all(check['exit_code'] == 0 for check in checks), 'checks': checks}
    data = json.dumps(report, indent=2) + '\n'
    if args.output:
        Path(args.output).write_text(data, encoding='utf-8')
    else:
        sys.stdout.write(data)
    return 0 if report['all_passed'] else 1


if __name__ == '__main__':
    raise SystemExit(main())