from ..paths import get_templates_path
import shutil
import os

def find_template_conflicts(dest_dir: str) -> list[str]:
    templates_path = get_templates_path() / "project"

    if not os.path.exists(templates_path):
        raise RuntimeError(f"Project template path does not exist: {templates_path}")

    conflicts = []

    for root, _, files in os.walk(templates_path):
        rel = os.path.relpath(root, templates_path)
        target_root = os.path.join(dest_dir, rel) if rel != "." else dest_dir

        for file in files:
            target_file = os.path.join(target_root, file)
            if os.path.exists(target_file):
                conflicts.append(target_file)

    return conflicts

def copy_template_files(dest_dir: str, force: bool = False, checked: bool = False) -> None:
    templates_path = get_templates_path() / "project"

    if not os.path.exists(templates_path):
        raise RuntimeError(f"Project template path does not exist: {templates_path}")

    os.makedirs(dest_dir, exist_ok=True)

    if not checked:
        conflicts = find_template_conflicts(dest_dir)
        if conflicts and not force:
            raise FileExistsError(
                "Refusing to overwrite existing files:\n" +
                "\n".join(conflicts)
            )

    shutil.copytree(
        templates_path,
        dest_dir,
        dirs_exist_ok=True
    )

def is_chipnut_workspace(path: str = ".") -> bool:
    return os.path.isfile(os.path.join(path, "Nutfile"))