import unittest
import os
from enum import Enum
from typing import List, Dict, Any, Tuple, Optional, Set
from lightbrow.connectors.base import FileItem, AccessError, AccessLevel, BaseConnector
# --- Minimal recreations of assumed lightbrow base/data structures ---
# (In a real scenario, these would be imported from your lightbrow library)


# --- Actual lightbrow imports (replace with your actual module paths) ---
# from lightbrow.connectors.s3connector import S3Connector # Assuming this path
# from lightbrow.browsers.s3browser import S3Browser     # Assuming this path
# from lightbrow.search_engines.simple_search import SimpleSearch # Assuming this path

# --- Mock implementations for the purpose of these tests, if actual classes are not available ---
# If S3Connector, S3Browser, SimpleSearch are not found, the test will use these mocks.
# In a real test environment, you'd import the actual classes.

from lightbrow.connectors import S3Connector # Try to import actual
from lightbrow.connectors.s3connector import S3Connector as S3ConnectorReal # Alias for clarity
from lightbrow.browsers.s3browser import S3Browser

from lightbrow.search_engines import SimpleSearch
from lightbrow.search_engines import SimpleSearch as SimpleSearchReal # Alias


# --- Helper Mock Connector for Search Tests ---
class MockConnectorSync(BaseConnector): # Synchronous version for test
    def __init__(self, default_prefix="s3://"):
        super().__init__(default_prefix=default_prefix)
        # This data is based on run_sync_test from the prompt
        self._path_index["testbucket"] = {
            "s3://testbucket/foo/bar.txt": FileItem("bar.txt", "s3://testbucket/foo/bar.txt", False, 100, access_level=AccessLevel.READ_ONLY),
            "s3://testbucket/foo/baz/": FileItem("baz", "s3://testbucket/foo/baz/", True, access_level=AccessLevel.READ_ONLY),
            "s3://testbucket/foobar/item.zip": FileItem("item.zip", "s3://testbucket/foobar/item.zip", False, 2000, access_level=AccessLevel.READ_ONLY),
            "s3://testbucket/another/path/endingwithB": FileItem("endingwithB", "s3://testbucket/another/path/endingwithB", False, 50, access_level=AccessLevel.READ_ONLY),
            "s3://testbucket/start/s3_file_b": FileItem("s3_file_b", "s3://testbucket/start/s3_file_b", False, 60, access_level=AccessLevel.READ_ONLY),
            "s3://testbucket/start/s3_file_b_extra": FileItem("s3_file_b_extra", "s3://testbucket/start/s3_file_b_extra", False, 70, access_level=AccessLevel.READ_ONLY),
        }
        self._path_index["ta"] = {
            "s3://ta/bab/file.txt": FileItem("file.txt", "s3://ta/bab/file.txt", False, 10, access_level=AccessLevel.READ_ONLY),
            "s3://ta/bab/": FileItem("bab", "s3://ta/bab/", True, access_level=AccessLevel.READ_ONLY), # Dir
            "s3://ta/ba3-3b/data.json": FileItem("data.json", "s3://ta/ba3-3b/data.json", False, 20, access_level=AccessLevel.READ_ONLY),
            "s3://ta/ba3-3b/": FileItem("ba3-3b", "s3://ta/ba3-3b/", True, access_level=AccessLevel.READ_ONLY), # Dir
            "s3://ta/bc/b": FileItem("b", "s3://ta/bc/b", False, 30, access_level=AccessLevel.READ_ONLY), # file
            "s3://ta/ba3-3b/tempo": FileItem("tempo", "s3://ta/ba3-3b/tempo", False, 40, access_level=AccessLevel.READ_ONLY),
        }

    # For SimpleSearch, we make these synchronous as SimpleSearch.search is synchronous in the example
    def list_items(self, path: str = "", bucket_name: Optional[str] = None) -> List[FileItem]: # Changed from async def
        if bucket_name and bucket_name in self._path_index:
            # This mock's list_items isn't directly used by the SimpleSearch mock if it uses get_path_index_for_bucket
            # but a real SimpleSearch might call it.
            prefix_to_match = f"{self.default_prefix}{bucket_name}/"
            if path: # path is relative to bucket
                prefix_to_match += path
            
            matched_items = []
            for item_path, item_obj in self._path_index[bucket_name].items():
                if item_path.startswith(prefix_to_match):
                     # Simplistic: if path is "foo/", item "foo/bar.txt" matches, "foo/" matches.
                     # It doesn't correctly handle listing just direct children vs recursive.
                     # For SimpleSearch, the _path_index direct access is more relevant.
                    matched_items.append(item_obj)
            return matched_items
        return []

    def get_item_info(self, path: str, bucket_name: Optional[str] = None) -> Optional[FileItem]: # Changed from async def
        # Path is expected to be a full path like "s3://bucket/key"
        # Or bucket_name is given and path is relative.
        # For simplicity, assume path is full if bucket_name is None.
        target_bucket_name = bucket_name
        item_key_in_bucket = path

        if not target_bucket_name:
            try:
                if "://" in path:
                    protocol_bucket = path.split("://")[1]
                    target_bucket_name = protocol_bucket.split("/")[0]
                    # item_key_in_bucket remains the full path for lookup in _path_index
                else: # Should not happen if path is always full or bucket_name provided
                    return None
            except IndexError:
                return None
        else: # bucket_name is provided, path is relative
            item_key_in_bucket = f"{self.default_prefix}{bucket_name}/{path}"


        if target_bucket_name in self._path_index:
            return self._path_index[target_bucket_name].get(item_key_in_bucket)
        return None

    def check_access(self, path: str, bucket_name: Optional[str] = None) -> AccessLevel: # Changed from async def
        item = self.get_item_info(path, bucket_name)
        return item.access_level if item else AccessLevel.NO_ACCESS

    # Expose _path_index for SimpleSearch mock
    def get_path_index_for_bucket(self, bucket_name: str) -> Dict[str, FileItem]:
        return self._path_index.get(bucket_name, {})
    def start_background_indexing(self, bucket, max_depth = None):
        a = 2 # Placeholder for background indexing, not used in tests
        # In a real implementation, this would start an async task to index the bucket.
        

# --- Unit Test Classes ---

class TestS3Connector(unittest.TestCase):
    """Test cases for S3Connector
    This is to ensure the S3Connector class can be initialized correctly.
    Deep testing requires integration tests with a running S3-compatible server.
    """
    def test_s3connector_initialization_no_auth(self):
        """Test S3Connector initialization with no auth (e.g., for public buckets or IAM roles)."""
        connector = S3ConnectorReal() # Uses the actual or mock S3Connector
        self.assertIsInstance(connector, S3ConnectorReal)
        self.assertEqual(connector.default_prefix, "s3://")

    def test_s3connector_initialization_with_minio_auth(self):
        """Test S3Connector initialization with MinIO-style auth config."""
        minio_config = {
            'access_key': 'testkey',
            'secret_key': 'testsecret',
            'endpoint_url': 'http://localhost:9000',
        }
        connector = S3ConnectorReal(auth_config=minio_config, default_prefix="s3a://")
        self.assertIsInstance(connector, S3ConnectorReal)
        self.assertEqual(connector.auth_config, minio_config)
        self.assertEqual(connector.default_prefix, "s3a://")

    def test_s3connector_initialization_with_aws_auth(self):
        """Test S3Connector initialization with AWS-style auth config (no endpoint)."""
        aws_config = {
            'access_key': 'AWSACCESSKEY',
            'secret_key': 'AWSSECRETKEY',
            'region': 'us-west-1'
            # no 'endpoint_url' implies AWS S3
        }
        connector = S3ConnectorReal(auth_config=aws_config)
        self.assertIsInstance(connector, S3ConnectorReal)
        self.assertEqual(connector.auth_config, aws_config)
        self.assertEqual(connector.default_prefix, "s3://")

class TestS3Browser(unittest.TestCase):
    """
    Test cases for S3Browser in LightBrow.
    This ensures the S3Browser class can be initialized correctly.
    """
    def setUp(self):
        self.mock_connector_s3 = MockConnectorSync(default_prefix="s3://")
        self.mock_connector_s3a = MockConnectorSync(default_prefix="s3a://")

    def test_s3browser_initialization_empty(self):
        """Test S3Browser initialization with no bucket_connector_pairs."""
        browser = S3Browser(bucket_connector_pairs=[])
        self.assertIsInstance(browser, S3Browser)
        self.assertEqual(len(browser.connectors), 0)

    def test_s3browser_initialization_with_connectors(self):
        """Test S3Browser initialization with multiple bucket connectors."""
        pairs = [
            ('bucket1', self.mock_connector_s3),
            ('anotherbucket', self.mock_connector_s3a)
        ]
        browser = S3Browser(bucket_connector_pairs=pairs, max_depth=5)
        self.assertIsInstance(browser, S3Browser)
        self.assertEqual(len(browser.connectors), 2)
        self.assertIn('bucket1', browser.connectors)
        self.assertIn('anotherbucket', browser.connectors)
        self.assertIs(browser.connectors['bucket1'], self.mock_connector_s3)
        self.assertIs(browser.connectors['anotherbucket'], self.mock_connector_s3a)
        self.assertEqual(browser.max_depth, 5)


# class TestSearchEngine(unittest.TestCase):
#     """
#     Test cases for search engines in LightBrow.
#     This ensures the SimpleSearch class can be initialized correctly
#     and that it can perform basic search with dummy data.
#     """
#     @classmethod
#     def setUpClass(cls):
#         cls.connector = MockConnectorSync(default_prefix="s3://") # Consistent prefix for tests
#         cls.searcher = SimpleSearchReal(cls.connector) # Use actual or mock SimpleSearch

#         # Expected FileItem instances for easier assertion later (paths are primary identifiers)
#         cls.fi_bar_txt = FileItem("bar.txt", "s3://testbucket/foo/bar.txt", False)
#         cls.fi_baz_dir = FileItem("baz", "s3://testbucket/foo/baz/", True)
#         cls.fi_item_zip = FileItem("item.zip", "s3://testbucket/foobar/item.zip", False)
#         cls.fi_endingwithB = FileItem("endingwithB", "s3://testbucket/another/path/endingwithB", False)
#         cls.fi_s3_file_b = FileItem("s3_file_b", "s3://testbucket/start/s3_file_b", False)
#         cls.fi_s3_file_b_extra = FileItem("s3_file_b_extra", "s3://testbucket/start/s3_file_b_extra", False)

#         cls.fi_ta_file_txt = FileItem("file.txt", "s3://ta/bab/file.txt", False)
#         cls.fi_ta_bab_dir = FileItem("bab", "s3://ta/bab/", True)
#         cls.fi_ta_data_json = FileItem("data.json", "s3://ta/ba3-3b/data.json", False)
#         cls.fi_ta_ba3_3b_dir = FileItem("ba3-3b", "s3://ta/ba3-3b/", True)
#         cls.fi_ta_b_file = FileItem("b", "s3://ta/bc/b", False)
#         cls.fi_ta_tempo_file = FileItem("tempo", "s3://ta/ba3-3b/tempo", False)

#     def assertResultsMatchPaths(self, results: List[FileItem], expected_paths: List[str]):
#         """Helper to compare result paths against expected paths, order agnostic."""
#         found_paths = sorted([item.path for item in results])
#         self.assertListEqual(found_paths, sorted(expected_paths))
        
#     def assertResultsMatchFileItems(self, results: List[FileItem], expected_items: List[FileItem]):
#         """Helper to compare result FileItems against expected FileItems, order agnostic."""
#         # Using set comparison for FileItem requires FileItem to be hashable and have __eq__
#         self.assertCountEqual(results, expected_items)


#     def test_search_initialization(self):
#         """Test SimpleSearch initialization."""
#         self.assertIsInstance(self.searcher, SimpleSearchReal)
#         self.assertIs(self.searcher.connector, self.connector)

#     def test_search_ab_in_ta(self):
#         """Query: 'ab', Bucket: 'ta'"""
#         results = self.searcher.search("ab", "ta")
#         expected = [self.fi_ta_file_txt, self.fi_ta_bab_dir] # Contains 'ab' in 'bab'
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_a_star_b_in_ta(self):
#         """Query: 'a*b', Bucket: 'ta'"""
#         results = self.searcher.search("a*b", "ta")
#         # s3://ta/bab/file.txt (bab)
#         # s3://ta/bab/ (bab/)
#         # s3://ta/ba3-3b/data.json (ba3-3b)
#         # s3://ta/ba3-3b/ (ba3-3b/)
#         # s3://ta/bc/b (b) -> this is tricky, 'a*b' implies 'a' then something then 'b'. 'b' alone doesn't match.
#         # The original example included s3://ta/bc/b for "a*b", which suggests the regex might be `.*a.*b.*` if not anchored.
#         # My mock SimpleSearch interprets "a*b" as containing "a" followed by zero or more chars, then "b".
#         # Let's adjust expectation based on typical wildcard meaning "contains a, then later contains b"
#         # If simple_search `_compile_search_regex` makes `a*b` into `.*a.*b.*` (contains a then contains b)
#         # then `s3://ta/bab/file.txt`, `s3://ta/bab/` and `s3://ta/ba3-3b/data.json`, `s3://ta/ba3-3b/` should match.
#         # `s3://ta/bc/b` should NOT match `a*b` unless a is optional.
#         #
#         # If the mock SimpleSearch used `pattern = query.replace("*", ".*").replace("?", ".?")` and `re.compile(f".*{pattern}.*")`
#         # it means it searches for the pattern `a.*b` anywhere in the string.
#         # s3://ta/bab/file.txt (matches 'bab')
#         # s3://ta/bab/ (matches 'bab/')
#         # s3://ta/ba3-3b/data.json (matches 'ba3-3b')
#         # s3://ta/ba3-3b/ (matches 'ba3-3b/')
#         # s3://ta/bc/b does NOT match 'a' then 'b'.
#         # The prompt's output for "a*b" was: # s3://ta/bab/*, s3://ta/ba3-3b/*, s3://ta/bc/b
#         # This implies `s3://ta/bc/b` was expected. This is only true if `*` means "zero or more of any char",
#         # and `a*b` is treated as "a then anything then b" OR "b".
#         # Or maybe the `*` can match an empty sequence before `a` as well, if the regex is `.*a?.*b.*`.
#         # Let's assume the SimpleSearch wildcard '*' is like shell glob (zero or more chars) and query is substring.
#         # `a*b` -> find `a<any_chars>b`
#         expected = [
#             self.fi_ta_file_txt, # s3://ta/bab/file.txt
#             self.fi_ta_bab_dir,  # s3://ta/bab/
#             self.fi_ta_data_json,# s3://ta/ba3-3b/data.json
#             self.fi_ta_ba3_3b_dir # s3://ta/ba3-3b/
#         ]
#         self.assertResultsMatchFileItems(results, expected)


#     def test_search_exact_file_in_ta(self):
#         """Query: '<s>s3://ta/bc/b<e>', Bucket: 'ta'"""
#         results = self.searcher.search("<s>s3://ta/bc/b<e>", "ta")
#         expected = [self.fi_ta_b_file]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_exact_dir_in_ta(self):
#         """Query: '<s>s3://ta/ba3-3b/<e>', Bucket: 'ta'"""
#         results = self.searcher.search("<s>s3://ta/ba3-3b/<e>", "ta")
#         expected = [self.fi_ta_ba3_3b_dir]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_startswith_wildcard_endswith_b_in_ta(self):
#         """Query: '<s>s3://*b<e>', Bucket: 'ta'"""
#         # Expected: s3://ta/bc/b (file)
#         # s3://ta/ba3-3b/ (dir) path ends with '/', so *b<e> won't match unless query is *b/<e>
#         # The prompt example had this ambiguity. The MockConnectorSync has s3://ta/ba3-3b/ (ends with /)
#         # So, only s3://ta/bc/b should match.
#         results = self.searcher.search("<s>s3://*b<e>", "ta")
#         expected = [self.fi_ta_b_file]
#         self.assertResultsMatchFileItems(results, expected)
        
#     def test_search_startswith_wildcard_endswith_b_slash_in_ta(self):
#         """Query: '<s>s3://*b/<e>', Bucket: 'ta'"""
#         # This should match s3://ta/ba3-3b/
#         results = self.searcher.search("<s>s3://*b/<e>", "ta")
#         expected = [self.fi_ta_ba3_3b_dir] # s3://ta/ba3-3b/
#         self.assertResultsMatchFileItems(results, expected)


#     def test_search_all_in_testbucket(self):
#         """Query: '*', Bucket: 'testbucket'"""
#         results = self.searcher.search("*", "testbucket")
#         expected = [
#             self.fi_bar_txt, self.fi_baz_dir, self.fi_item_zip,
#             self.fi_endingwithB, self.fi_s3_file_b, self.fi_s3_file_b_extra
#         ]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_foo_in_testbucket(self):
#         """Query: 'foo', Bucket: 'testbucket'"""
#         # Matches paths containing "foo"
#         results = self.searcher.search("foo", "testbucket")
#         expected = [
#             self.fi_bar_txt, # s3://testbucket/foo/bar.txt
#             self.fi_baz_dir, # s3://testbucket/foo/baz/
#             self.fi_item_zip # s3://testbucket/foobar/item.zip
#         ]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_exact_file_in_testbucket(self):
#         """Query: '<s>s3://testbucket/foo/bar.txt<e>', Bucket: 'testbucket'"""
#         results = self.searcher.search("<s>s3://testbucket/foo/bar.txt<e>", "testbucket")
#         expected = [self.fi_bar_txt]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_bar_txt_in_testbucket_with_prefix(self):
#         """Query: 'bar.txt', Bucket: 'testbucket', Prefix: 'foo/'"""
#         # The SimpleSearch mock needs to handle search_path_prefix correctly.
#         # It should match "bar.txt" against item names/paths *relative* to "s3://testbucket/foo/"
#         results = self.searcher.search("bar.txt", "testbucket", search_path_prefix="foo/")
#         # Expected: s3://testbucket/foo/bar.txt
#         # The mock SimpleSearch might need adjustment to ensure `search_path_prefix` correctly
#         # filters items first and then applies the query to the remaining part of the path.
#         # The provided `run_sync_test` implies the path passed to regex is relative if prefix is given.
#         expected = [self.fi_bar_txt]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_b_endswith_in_ta_with_prefix_bc(self):
#         """Query: 'b<e>', Bucket: 'ta', Prefix: 'bc/'"""
#         # search for paths ending in 'b' under "s3://ta/bc/"
#         # Expected: s3://ta/bc/b
#         # If prefix is "bc/", paths to test are relative to "s3://ta/bc/"
#         # So "s3://ta/bc/b" becomes "b" for query "b<e>"
#         results = self.searcher.search("b<e>", "ta", search_path_prefix="bc/")
#         expected = [self.fi_ta_b_file]
#         self.assertResultsMatchFileItems(results, expected)

#     def test_search_no_results(self):
#         """Test a query that should yield no results."""
#         results = self.searcher.search("thisstringshouldnotmatchanything", "testbucket")
#         self.assertEqual(len(results), 0)

#     def test_search_in_empty_bucket(self):
#         """Test search in a bucket that exists but has no items in mock."""
#         self.connector._path_index["emptybucket"] = {}
#         results = self.searcher.search("*", "emptybucket")
#         self.assertEqual(len(results), 0)
#         del self.connector._path_index["emptybucket"] # cleanup

#     def test_search_in_nonexistent_bucket(self):
#         """Test search in a bucket not in the mock index."""
#         results = self.searcher.search("*", "nonexistentbucket")
#         self.assertEqual(len(results), 0)


if __name__ == '__main__':
    # This allows running the tests from the script directly
    # You might need to adjust PYTHONPATH if lightbrow modules are not directly importable
    # For example: export PYTHONPATH=$PYTHONPATH:/path/to/your/lightbrowproject
    print("Running LightBrow Unit Tests...")
    print("---")
    print("Note: If 'S3Connector not found', 'S3Browser not found', or 'SimpleSearch not found' warnings appear,")
    print("it means the tests are using the MOCK implementations defined within this test file.")
    print("For real testing, ensure your lightbrow package is installed and importable.")
    print("---")
    unittest.main()