diff --git a/.gitignore b/.gitignore
index e5cb8b6..a8b30e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .ruff_cache
 __pycache__
 debug.py
-videos
\ No newline at end of file
+videos
+config.test.json
\ No newline at end of file
diff --git a/constants.py b/constants.py
index 96f2264..89f8acc 100644
--- a/constants.py
+++ b/constants.py
@@ -1,6 +1,10 @@
 from pathlib import Path
+import os
 
-
-DEFAULT_CONFIG_PATH = Path(__file__).parent / "config.json"
+DEFAULT_CONFIG_PATH = (
+    Path(__file__).parent / "config.json"
+    if not os.getenv("TESTING")
+    else Path(__file__).parent / "config.test.json"
+)
 
 FFMPEG_COMMAND = "ffmpeg"
diff --git a/entry.py b/entry.py
new file mode 100644
index 0000000..7f69e0f
--- /dev/null
+++ b/entry.py
@@ -0,0 +1,17 @@
+from processor import process
+import sys
+import asyncio
+from settings import settings
+
+
+async def entry() -> None:
+    if any("once" in _ for _ in sys.argv):
+        # 单次运行
+        await process()
+    while True:
+        await process()
+        await asyncio.sleep(settings.interval)
+
+
+def start() -> None:
+    asyncio.run(entry())
diff --git a/main.py b/main.py
index b078aeb..9e5fcc0 100644
--- a/main.py
+++ b/main.py
@@ -1,10 +1,4 @@
-import asyncio
-from processor import process
-
-
-async def main() -> None:
-    await process()
-
+from entry import start
 
 if __name__ == "__main__":
-    asyncio.run(main())
+    start()
diff --git a/settings.py b/settings.py
index 3bfe0f0..4e2da42 100644
--- a/settings.py
+++ b/settings.py
@@ -1,21 +1,27 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, field, fields
 from dataclasses_json import DataClassJsonMixin
 from pathlib import Path
 from typing import Self
-import os
 
 from constants import DEFAULT_CONFIG_PATH
 
 
 @dataclass
 class Config(DataClassJsonMixin):
-    sessdata: str
-    bili_jct: str
-    buvid3: str
-    dedeuserid: str
-    ac_time_value: str
-    favorite_ids: list[int]
-    path_mapper: dict[int, str]
+    sessdata: str = ""
+    bili_jct: str = ""
+    buvid3: str = ""
+    dedeuserid: str = ""
+    ac_time_value: str = ""
+    interval: int = 20
+    favorite_ids: list[int] = field(default_factory=list)
+    path_mapper: dict[int, str] = field(default_factory=dict)
+
+    def validate(self) -> Self:
+        """所有值必须被设置"""
+        if not all(getattr(self, f.name) for f in fields(self)):
+            raise ValueError("Some config values are not set.")
+        return self
 
     @staticmethod
     def load(path: Path | None = None) -> Self:
@@ -33,7 +39,7 @@ class Config(DataClassJsonMixin):
         try:
             path.parent.mkdir(parents=True, exist_ok=True)
             with path.open("w") as f:
-                f.write(Config.schema().dumps(self))
+                f.write(Config.schema().dumps(self, indent=4))
             return self
         except Exception as e:
             raise RuntimeError(f"Failed to save config file: {path}") from e
@@ -41,26 +47,10 @@ class Config(DataClassJsonMixin):
 
 def init_settings() -> Config:
     if DEFAULT_CONFIG_PATH.exists():
-        return Config.load(DEFAULT_CONFIG_PATH)
-    if os.getenv("TESTING"):
-        from debug import debug_config
-
-        return debug_config
-    return (
-        Config.schema()
-        .load(
-            {
-                "sessdata": "",
-                "bili_jct": "",
-                "buvid3": "",
-                "dedeuserid": "",
-                "ac_time_value": "",
-                "favorite_ids": [],
-                "path_mapper": {},
-            }
-        )
-        .save(DEFAULT_CONFIG_PATH)
-    )
+        conf = Config.load(DEFAULT_CONFIG_PATH)
+    else:
+        conf = Config()
+    return conf.save(DEFAULT_CONFIG_PATH).validate()
 
 
 settings = init_settings()