use command_runner::{CommandRunner, SetuidCommandRunner};
use symbols::{Action, Symbol, SymbolRunner};
use symbols::acme::{AcmeCert, AcmeCertChain};
use symbols::file::File;
use symbols::hook::Hook;
use symbols::list::ListAction;
use symbols::nginx::server::NginxServer;
use symbols::systemd::reload::ReloadService;
use symbols::tls::SelfSignedTlsCert;

pub struct SymbolFactory<'a, C: 'a + CommandRunner, R: 'a + SymbolRunner>{
  command_runner: &'a C,
  acme_command_runner: SetuidCommandRunner<'a, C>,
  symbol_runner: &'a R
}

impl<'b, C: 'b + CommandRunner, R: 'b + SymbolRunner> SymbolFactory<'b, C, R> {
  pub fn new(command_runner: &'b C, symbol_runner: &'b R) -> Self {
    let acme_user = "acme"; // FIXME: CONFIG

    let acme_command_runner = SetuidCommandRunner::new(acme_user, command_runner);
    SymbolFactory { command_runner: command_runner, acme_command_runner: acme_command_runner, symbol_runner: symbol_runner }
  }

  pub fn get_nginx_acme_server<'a, 'c: 'a, S: 'a + Symbol>(&'c self, host: &'static str, nginx_server_symbol: S) -> Box<Action + 'a> {
    Box::new(ListAction::new(vec![
      Box::new(SelfSignedTlsCert::new(
        host.into(),
        self.command_runner
      )).into_action(self.symbol_runner),
      Box::new(Hook::new(
        nginx_server_symbol,
        ReloadService::new("nginx", self.command_runner)
      )).into_action(self.symbol_runner),
      Box::new(AcmeCert::new(
        host.into(),
        &self.acme_command_runner
      )).into_action(self.symbol_runner),
      Box::new(Hook::new(
        AcmeCertChain::new(
          host.into(),
          &self.acme_command_runner
        ),
        ReloadService::new("nginx", self.command_runner)
      )).into_action(self.symbol_runner)
    ]))
  }
  pub fn get_nginx_acme_challenge_config<'a>(&'a self) -> Box<Action + 'a> {
    Box::new(File::new(
      "/etc/nginx/snippets/acme-challenge.conf", "location ^~ /.well-known/acme-challenge/ {
  alias /home/acme/challenges/;
  try_files $uri =404;
}"
    )).into_action(self.symbol_runner)
  }

  fn get_php_fpm_pool_socket_path<'a>(&'a self, user_name: &'static str) -> String {
    format!("/run/php/{}.sock", user_name)
  }

  pub fn get_php_fpm_pool<'a>(&'a self, user_name: &'static str) -> Box<Action + 'a> {
    let socket = self.get_php_fpm_pool_socket_path(user_name);
    Box::new(Hook::new(
      File::new(
        format!("/etc/php/7.0/fpm/pool.d/{}.conf", user_name),
        format!(
        "[{0}]

user = {0}
group = www-data
listen = {1}
listen.owner = www-data
pm = ondemand
pm.max_children = 10"
      , user_name, socket)),
      ReloadService::new("php7.0-fpm", self.command_runner)
    )).into_action(self.symbol_runner)
  }

  pub fn get_nginx_php_server<'a>(&'a self, host_name: &'static str, user_name: &'static str, root_dir: &'static str) -> NginxServer<'a, C, String> {
    let socket = self.get_php_fpm_pool_socket_path(user_name);
    NginxServer::new_php(
      host_name,
      socket.into(),
      root_dir,
      self.command_runner
    )
  }
}