First commit

apps/channel_gateway/app/settings.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+from typing import Literal
+from dotenv import load_dotenv
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+load_dotenv(override=False)
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file='.env', env_file_encoding='utf-8', extra='ignore')
+
+    APP_NAME: str = 'external-channel-gateway'
+    LOG_LEVEL: str = 'INFO'
+    API_HOST: str = '0.0.0.0'
+    API_PORT: int = 7000
+    CORS_ORIGINS: str = 'http://localhost:5173,http://127.0.0.1:5173'
+
+    # adapter = receive native/simple channel payloads and translate them to GatewayRequest.
+    # proxy   = receive only GatewayRequest and forward it after validation.
+    CHANNEL_GATEWAY_RUNTIME_MODE: Literal['adapter','proxy'] = 'adapter'
+    # Legacy alias accepted only for compatibility. Prefer CHANNEL_GATEWAY_RUNTIME_MODE.
+    CHANNEL_GATEWAY_MODE: str | None = None
+
+    AGENT_FRAMEWORK_BASE_URL: str = 'http://localhost:8000'
+    AGENT_FRAMEWORK_GATEWAY_PATH: str = '/gateway/message'
+    DEFAULT_TENANT_ID: str = 'default'
+    DEFAULT_AGENT_ID: str = 'telecom_contas'
+    REQUEST_TIMEOUT_SECONDS: float = 120.0
+
+    INTERNAL_GATEWAY_TOKEN: str | None = None
+
+    @property
+    def runtime_mode(self) -> str:
+        legacy = (self.CHANNEL_GATEWAY_MODE or '').strip().lower()
+        if legacy in {'adapter', 'proxy'}:
+            return legacy
+        # Legacy mapping for old deployments: embedded meant adapters on.
+        if legacy == 'embedded':
+            return 'adapter'
+        if legacy == 'external':
+            return 'proxy'
+        return self.CHANNEL_GATEWAY_RUNTIME_MODE
+
+
+settings = Settings()