import json
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / 'cli'))

from nanoshare_client import cli

class FakeClient:
  def __init__(self):
    self.registry = {'picoshare': 'https://example.com'}
    self.uploads = []
    self.deleted = []
    self.remote_files = []

  def call(self, node, method, params):
    if method == 'files.list':
      return {'files': list(self.remote_files)}
    if method == 'files.upload':
      file_id = f'file_{len(self.uploads) + 1}'
      self.uploads.append((node, params, file_id))
      self.remote_files.append({
        'file_id': file_id,
        'file_name': params['file_name'],
        'file_size': '1 B',
      })
      return {'file_id': file_id, 'file_name': params['file_name']}
    if method == 'files.delete':
      self.deleted.append(params['file_id'])
      self.remote_files = [item for item in self.remote_files if item['file_id'] != params['file_id']]
      return {'deleted': True}
    raise AssertionError(method)

  def close(self):
    pass

def test_sync_uploads_new_local_file_and_writes_state(tmp_path, monkeypatch):
  fake = FakeClient()
  monkeypatch.setattr(cli, 'make_client', lambda args: fake)

  (tmp_path / 'hello.txt').write_text('hello')

  code = cli.main([
    'sync',
    '--url', 'picoshare=https://example.com',
    '--token', 'token',
    str(tmp_path),
  ])

  assert code == 0
  assert fake.uploads[0][1]['file_name'] == 'hello.txt'
  state = json.loads((tmp_path / '.nanoshare-sync' / 'state.json').read_text())
  assert state['files']['hello.txt']['file_id'] == 'file_1'

def test_sync_deletes_old_remote_when_local_file_changes(tmp_path, monkeypatch):
  fake = FakeClient()
  fake.remote_files = [{'file_id': 'old_file', 'file_name': 'hello.txt', 'file_size': '5 B'}]
  monkeypatch.setattr(cli, 'make_client', lambda args: fake)

  path = tmp_path / 'hello.txt'
  path.write_text('changed')
  state_dir = tmp_path / '.nanoshare-sync'
  state_dir.mkdir()
  (state_dir / 'state.json').write_text(json.dumps({
    'version': 1,
    'files': {
      'hello.txt': {
        'file_id': 'old_file',
        'sha256': 'old_hash',
        'local_mtime': 1,
        'file_name': 'hello.txt',
      }
    }
  }))

  code = cli.main([
    'sync',
    '--url', 'picoshare=https://example.com',
    '--token', 'token',
    str(tmp_path),
  ])

  assert code == 0
  assert fake.deleted == ['old_file']
  state = json.loads((state_dir / 'state.json').read_text())
  assert state['files']['hello.txt']['file_id'] == 'file_1'