"""Unit tests for normalize_folder_path (REQ-002, REQ-063, REQ-064, REQ-066)."""

import pytest

from agentcache.functions import normalize_folder_path


class TestNormalizeFolderPath:
    def test_unix_path(self):
        assert (
            normalize_folder_path("/home/user/projects/myapp")
            == "home/user/projects/myapp"
        )

    def test_windows_path(self):
        result = normalize_folder_path("C:\\Users\\foo\\projects\\myapp")
        assert "\\" not in result
        assert "Users" in result or "users" in result.lower()

    def test_trailing_slash_stripped(self):
        result = normalize_folder_path("/home/user/projects/")
        assert not result.endswith("/")

    def test_leading_slash_stripped(self):
        result = normalize_folder_path("/home/user/projects")
        assert not result.startswith("/")

    def test_double_slashes_collapsed(self):
        result = normalize_folder_path("/home//user///projects")
        assert "//" not in result

    def test_empty_string_raises(self):
        with pytest.raises(ValueError):
            normalize_folder_path("")

    def test_path_traversal_raises(self):
        with pytest.raises(ValueError):
            normalize_folder_path("/home/user/../../etc/passwd")

    def test_length_cap(self):
        long_path = "a/" * 300
        result = normalize_folder_path(long_path)
        assert len(result) <= 512

    def test_idempotent(self):
        path = "/home/user/projects/myapp"
        once = normalize_folder_path(path)
        twice = normalize_folder_path(once)
        assert once == twice

    def test_relative_path(self):
        result = normalize_folder_path("projects/myapp/src")
        assert result == "projects/myapp/src"

    def test_windows_forward_slashes(self):
        result = normalize_folder_path("C:/Users/foo/projects")
        assert "\\" not in result

    def test_single_segment(self):
        result = normalize_folder_path("/workspace")
        assert result == "workspace"