chore : update env defaults and make targets

app/main.py

@@ -3,8 +3,10 @@ import time
 import socket
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel
+from dotenv import load_dotenv
 
 from .serial_bridge import SerialBridge, SerialConfig
+from .mock_bridge import MockBridge
 
 app = FastAPI(title="Pont bascule API", version="1.3")
 
@@ -16,20 +18,30 @@ def env(name: str, default: str) -> str:
     return os.getenv(name, default)
 
 
+load_dotenv()
+
 def hex2b(s: str) -> bytes:
     s = s.strip().replace("0x", "").replace(",", " ")
     parts = [p for p in s.split() if p]
     return bytes(int(p, 16) for p in parts)
 
 
-cfg = SerialConfig(
-    port=env("SERIAL_PORT", "/dev/ttyUSB0"),
-    baudrate=int(env("SERIAL_BAUDRATE", "9600")),
-    timeout_s=float(env("SERIAL_TIMEOUT_S", "1.0")),
-    open_delay_s=float(env("SERIAL_OPEN_DELAY_S", "2.0")),       # ✅ comme Tkinter
-    post_write_delay_s=float(env("SERIAL_POST_WRITE_DELAY_S", "0.5")),  # ✅
-)
-bridge = SerialBridge(cfg)
+APP_MODE = env("APP_MODE", "serial").strip().lower()
+if APP_MODE not in ("serial", "mock"):
+    APP_MODE = "serial"
+
+if APP_MODE == "mock":
+    cfg = None
+    bridge = MockBridge()
+else:
+    cfg = SerialConfig(
+        port=env("SERIAL_PORT", "/dev/ttyUSB0"),
+        baudrate=int(env("SERIAL_BAUDRATE", "9600")),
+        timeout_s=float(env("SERIAL_TIMEOUT_S", "1.0")),
+        open_delay_s=float(env("SERIAL_OPEN_DELAY_S", "2.0")),       # ✅ comme Tkinter
+        post_write_delay_s=float(env("SERIAL_POST_WRITE_DELAY_S", "0.5")),  # ✅
+    )
+    bridge = SerialBridge(cfg)
 
 
 class CustomReq(BaseModel):
@@ -40,12 +52,12 @@ class CustomReq(BaseModel):
 def health():
     return {
         "ok": True,
-        "mode": "serial",
+        "mode": APP_MODE,
         "busy": bridge.busy(),
         "hostname": socket.gethostname(),
         "timestamp": time.time(),
-        "port": cfg.port,
-        "baudrate": cfg.baudrate,
+        "port": cfg.port if cfg else None,
+        "baudrate": cfg.baudrate if cfg else None,
     }