"""disk_quota.py 单元测试。

不连真 DB ── parse_bytes / scan_user_dir / skip dotfile 行为 / 不存在路径,
都纯 Python 文件系统操作可单测。upsert / check_disk_quota 需要 DB,跳过(集成测覆盖)。
"""
from __future__ import annotations

import sys
import tempfile
import unittest
from pathlib import Path

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

from core.storage.disk_quota import parse_bytes, scan_user_dir


class TestParseBytes(unittest.TestCase):
    def test_int_passthrough(self):
        self.assertEqual(parse_bytes(1024), 1024)
        self.assertEqual(parse_bytes(0), 0)

    def test_gb(self):
        self.assertEqual(parse_bytes("5gb"), 5 * 1024 ** 3)
        self.assertEqual(parse_bytes("5g"), 5 * 1024 ** 3)
        self.assertEqual(parse_bytes("5GB"), 5 * 1024 ** 3)

    def test_mb(self):
        self.assertEqual(parse_bytes("500mb"), 500 * 1024 ** 2)
        self.assertEqual(parse_bytes("500m"), 500 * 1024 ** 2)

    def test_kb(self):
        self.assertEqual(parse_bytes("1kb"), 1024)

    def test_bytes(self):
        self.assertEqual(parse_bytes("1024b"), 1024)
        self.assertEqual(parse_bytes("1024"), 1024)

    def test_float_suffix(self):
        self.assertEqual(parse_bytes("1.5gb"), int(1.5 * 1024 ** 3))

    def test_invalid(self):
        self.assertIsNone(parse_bytes(""))
        self.assertIsNone(parse_bytes("xxx"))
        self.assertIsNone(parse_bytes("1.2.3"))
        self.assertIsNone(parse_bytes(None))


class TestScanUserDir(unittest.TestCase):
    def test_empty_dir(self):
        with tempfile.TemporaryDirectory() as d:
            b, c = scan_user_dir(Path(d))
            self.assertEqual((b, c), (0, 0))

    def test_nonexistent(self):
        b, c = scan_user_dir(Path("/nonexistent/path/xxx"))
        self.assertEqual((b, c), (0, 0))

    def test_count_and_size(self):
        with tempfile.TemporaryDirectory() as d:
            root = Path(d)
            (root / "a.txt").write_bytes(b"hello")            # 5
            (root / "sub").mkdir()
            (root / "sub" / "b.txt").write_bytes(b"world!")   # 6
            (root / "sub" / "c.txt").write_bytes(b"x" * 1000) # 1000
            b, c = scan_user_dir(root)
            self.assertEqual(b, 1011)
            self.assertEqual(c, 3)

    def test_skip_dotfile_toplevel(self):
        """平台隐藏缓存/临时区与用户记忆不计入产品文件配额。"""
        with tempfile.TemporaryDirectory() as d:
            root = Path(d)
            (root / "a.txt").write_bytes(b"counted")          # 7
            for hidden in (
                ".zcbot_cache",
                ".zcbot_external_results",
                ".zcbot_tmp",
                ".memory",
            ):
                (root / hidden).mkdir()
                (root / hidden / "skipped.bin").write_bytes(b"x" * 99999)
            b, c = scan_user_dir(root)
            self.assertEqual(b, 7)
            self.assertEqual(c, 1)


if __name__ == "__main__":
    unittest.main()