from models.model import Model


def _normalize_address(addr):
    """Normalize 6-byte ESP32 address to 12-char lowercase hex (no colons)."""
    if addr is None:
        return None
    s = str(addr).strip().lower().replace(":", "").replace("-", "")
    if len(s) == 12 and all(c in "0123456789abcdef" for c in s):
        return s
    return None


class Device(Model):
    def __init__(self):
        super().__init__()

    def create(self, name="", address=None, default_pattern=None, tabs=None):
        next_id = self.get_next_id()
        addr = _normalize_address(address)
        self[next_id] = {
            "name": name,
            "address": addr,
            "default_pattern": default_pattern if default_pattern else None,
            "tabs": list(tabs) if tabs else [],
        }
        self.save()
        return next_id

    def read(self, id):
        id_str = str(id)
        return self.get(id_str, None)

    def update(self, id, data):
        id_str = str(id)
        if id_str not in self:
            return False
        if "address" in data and data["address"] is not None:
            data = dict(data)
            data["address"] = _normalize_address(data["address"])
        self[id_str].update(data)
        self.save()
        return True

    def delete(self, id):
        id_str = str(id)
        if id_str not in self:
            return False
        self.pop(id_str)
        self.save()
        return True

    def list(self):
        return list(self.keys())