"""Export the Go 1.24 consumer slice from the producer's single source tree."""
from pathlib import Path
import argparse
import hashlib
import json

ROOT = Path(__file__).resolve().parent.parent
DESTINATION = ROOT / 'adapters/go/decisionpep'
FILES = ['LICENSE', 'pkg/api/canonical.go', 'pkg/api/caring.go',
         'pkg/api/resource_manifest.go', 'internal/sign/sign.go',
         'pkg/decisionpep/client.go', 'pkg/decisionpep/client_test.go',
         'testsupport/signfixture/sign.go']
BASELINE = {
    'pkg/api/canonical.go': 'a122a2e8cd524333b13c5939c7a3685e41efbe47497a64e0c7297c92b7f10d19',
    'pkg/api/caring.go': '1907156f0f889e7b9e9c14970cf7a86a20d00478a496efaf92c7231f27fec5e3',
    'pkg/api/resource_manifest.go': 'f0fa4080287d389ed48c2b1d6af96cc62e57ef72c902333f677f964420be133f',
    'internal/sign/sign.go': '0df9515922e90775ebbfac798361dcafb20da8a4213796b44e246b8a92046cde',
    'LICENSE': 'ff413f361a3b3bf44cf50f110fbcc4837064d57eefbcef89df2b43997c6262b6',
}


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('--check', action='store_true')
    args = parser.parse_args()
    output = {name: (ROOT / name).read_bytes() for name in FILES}
    for name, digest in BASELINE.items():
        if hashlib.sha256(output[name]).hexdigest() != digest:
            raise SystemExit('Producer API/signature baseline changed; review the export contract before advancing it')
    output['go.mod'] = b'module github.com/netkingdom/access-engine\n\ngo 1.24\n'
    metadata = {
        'upstream': 'github.com/netkingdom/access-engine',
        'commit': 'd328a2601095686f74376d87791bff01e2a3a2a3',
        'exact_unchanged_files': BASELINE,
        'module': 'Standalone Go1.24 source slice with original module/import identity; no canonical/schema/signature modifications',
        'new_code': ['pkg/decisionpep/client.go'],
        'fixture_code': ['testsupport/signfixture/sign.go'],
        'source_of_truth': 'repository root; generated with tools/export_decisionpep_adapter.py',
        'exported_file_sha256': {name: hashlib.sha256(raw).hexdigest() for name, raw in sorted(output.items())},
    }
    output['producer-source.json'] = (json.dumps(metadata, indent=2) + '\n').encode()
    actual = {str(item.relative_to(DESTINATION)) for item in DESTINATION.rglob('*') if item.is_file()}
    if actual - set(output):
        raise SystemExit('Unexpected files in the generated consumer slice')
    if args.check:
        drift = [name for name, raw in output.items() if not (DESTINATION / name).is_file() or (DESTINATION / name).read_bytes() != raw]
        if drift:
            raise SystemExit('Generated consumer slice differs: ' + ', '.join(drift))
    else:
        for name, raw in output.items():
            path = DESTINATION / name
            path.parent.mkdir(parents=True, exist_ok=True)
            path.write_bytes(raw)
    print(json.dumps({'status': 'verified' if args.check else 'exported', 'files': len(output)}))


if __name__ == '__main__':
    main()