Initial ai typewriter implementation

src/ai_typewriter/config.py

@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+import json
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Literal
+
+Provider = Literal["ollama", "gemini"]
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    provider: Provider = "ollama"
+    model: str = "llama3.1"
+    api_key: str = ""
+    server_url: str = "http://localhost:11434"
+    hotkey: str = "ctrl+alt+a"
+    request_timeout_seconds: float = 120.0
+    copy_wait_seconds: float = 1.0
+    type_delay_seconds: float = 0.0
+    restore_clipboard: bool = True
+    system_prompt: str = (
+        "Réponds directement et de manière ultra-concise. "
+        "Aucune phrase d'introduction, aucune salutation, aucun formatage superflu. "
+        "Uniquement la réponse brute."
+    )
+
+
+def _coerce_provider(value: Any) -> Provider:
+    provider = str(value or "ollama").lower().strip()
+    if provider not in {"ollama", "gemini"}:
+        raise ValueError("config.provider doit être 'ollama' ou 'gemini'")
+    return provider  # type: ignore[return-value]
+
+
+def load_config(path: str | Path = "config.json") -> AppConfig:
+    cfg_path = Path(path)
+    if not cfg_path.exists():
+        raise FileNotFoundError(
+            f"Configuration introuvable: {cfg_path}. Copiez config.json.template vers config.json."
+        )
+    data = json.loads(cfg_path.read_text(encoding="utf-8"))
+    return AppConfig(
+        provider=_coerce_provider(data.get("provider", "ollama")),
+        model=str(data.get("model", "llama3.1")),
+        api_key=str(data.get("api_key", "")),
+        server_url=str(data.get("server_url", "http://localhost:11434")).rstrip("/"),
+        hotkey=str(data.get("hotkey", "ctrl+alt+a")).lower(),
+        request_timeout_seconds=float(data.get("request_timeout_seconds", 120)),
+        copy_wait_seconds=float(data.get("copy_wait_seconds", 1)),
+        type_delay_seconds=float(data.get("type_delay_seconds", 0)),
+        restore_clipboard=bool(data.get("restore_clipboard", True)),
+        system_prompt=str(data.get("system_prompt", AppConfig.system_prompt)),
+    )