use crate::command_runner::CommandRunner;
use crate::storage::Storage;
use crate::symbols::Symbol;
use async_trait::async_trait;
use std::error::Error;

#[derive(Debug)]
pub struct Database<'a, D, S, C> {
  db_name: D,
  seed_file: S,
  command_runner: &'a C,
}

impl<'a, D, S, C: CommandRunner> Database<'a, D, S, C> {
  pub fn new(db_name: D, seed_file: S, command_runner: &'a C) -> Self {
    Self {
      db_name,
      seed_file,
      command_runner,
    }
  }

  async fn run_sql(&self, sql: &str) -> Result<String, Box<dyn Error>> {
    let b = self
      .command_runner
      .get_output("mariadb", args!["--skip-column-names", "-B", "-e", sql])
      .await?;
    Ok(String::from_utf8(b)?)
  }
}

#[async_trait(?Send)]
impl<D: AsRef<str>, S: Storage, C: CommandRunner> Symbol for Database<'_, D, S, C> {
  async fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
    Ok(
      self
        .run_sql(&format!("SHOW DATABASES LIKE '{}'", self.db_name.as_ref()))
        .await?
        .trim_end()
        == self.db_name.as_ref(),
    )
  }

  async fn execute(&self) -> Result<(), Box<dyn Error>> {
    self
      .run_sql(&format!("CREATE DATABASE {}", self.db_name.as_ref()))
      .await?;
    self
      .command_runner
      .run_successfully(
        "sh",
        args![
          "-c",
          format!(
            "mariadb '{}' < {}",
            self.db_name.as_ref(),
            self.seed_file.read_filename()?.to_str().unwrap()
          ),
        ],
      )
      .await
  }
}

#[cfg(test)]
mod test {}