use serde::{Serialize,Deserialize};
use std::fmt;

#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
/// `DataStore` options
pub enum DataStore {
	File,
  Mysql,    // (sqlx::MySqlPool),
  Postgres, // (sqlx::PgPool),
  Sqlite,   // (sqlx::SqlitePool),
  Redis,    // (redis::Client),
  // Tikv,     // (tikv::RawClient),
  Slab,     // (Storage),
  Unknown,
}

pub type OptionDataStore = Option<DataStore>;

impl Default for DataStore {
  fn default() -> Self {
    DataStore::Unknown
  }
}
impl DataStore {
  /// Get `DataStore`from String to enum
  #[must_use]
  pub fn get_from(str: String) -> DataStore {
    match str.as_str() {
      "file" | "File" => DataStore::File,
      "mysql" | "Mysql" | "MySql" => DataStore::Mysql,
      "postgres" | "Postgres" | "pg" => DataStore::Postgres,
      "sqlite" | "Sqlite" => DataStore::Sqlite,
      "redis" | "Redis" => DataStore::Redis,
      // "tikv" | "Tikv" => DataStore::Tikv,
      "slab" | "Slab" => DataStore::Slab,
      _ => DataStore::Unknown,
    }
  }
}

#[allow(clippy::pattern_type_mismatch)]
impl fmt::Display for DataStore {
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      DataStore::File => write!(f, "file"),
      DataStore::Mysql => write!(f, "mysql"),
      DataStore::Postgres => write!(f, "postgres"),
      DataStore::Sqlite => write!(f, "sqlite"),
      DataStore::Redis => write!(f, "redis"),
      // DataStore::Tikv => write!(f, "tikv"),
      DataStore::Slab => write!(f, "slab"),
      DataStore::Unknown => write!(f, "Unknown"),
    }
  }
}