feat(core): rewrite installer with modular config, dynamic drive resolver, and clean orchestration

module/config.py

@@ -0,0 +1,64 @@
+"""
+Configuration and environment resolution for Acc Installer.
+"""
+
+from dataclasses import dataclass, field
+import logging
+import os
+from pathlib import Path
+from typing import List, Optional
+
+logger = logging.getLogger("acc_installer")
+
+
+def detect_target_drive(candidates: Optional[List[str]] = None) -> str:
+    """
+    Find the first available non-system drive on Windows.
+    Falls back to 'C:\\' if no secondary drive is found.
+    """
+    if candidates is None:
+        candidates = ["D", "E", "F", "G", "H"]
+
+    for letter in candidates:
+        drive_path = f"{letter}:\\"
+        if os.path.exists(drive_path):
+            logger.info("Found candidate drive: %s", drive_path)
+            return drive_path
+
+    logger.warning("No secondary drive found in candidates. Falling back to C:\\")
+    return "C:\\"
+
+
+@dataclass
+class InstallerConfig:
+    """
+    Centralized configuration holding paths and operational flags for the installer.
+    """
+    source_dir: Path = field(default_factory=lambda: Path(r"C:\SoftwareNP"))
+    target_drive: str = field(default_factory=detect_target_drive)
+    dry_run: bool = False
+    
+    # Calculated paths
+    base_dir: Path = field(init=False)
+    soft_dir: Path = field(init=False)
+    acc_dir: Path = field(init=False)
+
+    def __post_init__(self):
+        # Normalize target drive
+        if not self.target_drive.endswith("\\") and not self.target_drive.endswith("/"):
+            self.target_drive = f"{self.target_drive}\\"
+
+        drive_path = Path(self.target_drive)
+        self.base_dir = drive_path / "NovinPardazOne"
+        self.soft_dir = self.base_dir / "NovinSoft"
+        self.acc_dir = self.base_dir / "NovinAcc"
+
+    def ensure_directories(self) -> None:
+        """Create necessary target directories if they do not exist."""
+        if self.dry_run:
+            logger.info("[DRY-RUN] Would create: %s and %s", self.soft_dir, self.acc_dir)
+            return
+
+        self.soft_dir.mkdir(parents=True, exist_ok=True)
+        self.acc_dir.mkdir(parents=True, exist_ok=True)
+        logger.debug("Ensured directories at %s and %s", self.soft_dir, self.acc_dir)