#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct Config {
    pub layers: Vec<String>,
    pub root_user: RootUser,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub mounts: Vec<Mount>,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub files: Vec<File>,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub groups: Vec<Group>,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub users: Vec<User>,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct RootUser {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub password_hash: Option<String>,
    pub authorized_keys: Vec<String>,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct Mount {
    pub r#type: Option<String>,
    pub dev: String,
    pub path: String,
    pub options: Option<String>,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct Group {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub gid: Option<u32>,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct User {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub uid: Option<u32>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub gid: Option<u32>,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
pub struct File {
    pub path: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub mode: Option<u32>,
    #[serde(flatten)]
    pub kind: FileKind,
}

#[derive(Debug, serde::Deserialize, serde::Serialize)]
#[serde(rename_all = "snake_case")]
pub enum FileKind {
    Content(String),
    Symlink(String),
    Dir(bool),
}