use std::fmt::Write as FmtWrite;

use crate::repl::Repl;
use crate::repl::command_tree::CommandTree;
use crate::repl::directive_actions::DirectiveAction;
use crate::language::{LangMetaRequest, LangMetaResponse, DebugAsk, DebugResponse}; 


pub fn directives_from_pass_names(pass_names: &Vec<String>) -> CommandTree {
  use DirectiveAction::*;

  let passes_directives: Vec<CommandTree> = pass_names.iter()
    .map(|pass_name| { CommandTree::nonterm_no_further_tab_completions(pass_name, None) })
    .collect();

  CommandTree::Top(vec![
    CommandTree::terminal_act("exit", Some("exit the REPL"), vec![], QuitProgram),
    CommandTree::terminal_act("quit", Some("exit the REPL"), vec![], QuitProgram),
    CommandTree::terminal_act("help", Some("Print this help message"), vec![], Help),
    CommandTree::nonterm("debug",
      Some("Configure debug information"),
      vec![
        CommandTree::terminal_act("list-passes", Some("List all registered compiler passes"), vec![], ListPasses),
        CommandTree::terminal_act("show-immediate", None, passes_directives.clone(), ShowImmediate),
        CommandTree::terminal_act("show", None, passes_directives.clone(), Show),
        CommandTree::terminal_act("hide", None, passes_directives.clone(), Hide),
        CommandTree::nonterm("total-time", None, vec![
          CommandTree::terminal_act("on", None, vec![], TotalTimeOn), 
          CommandTree::terminal_act("off", None, vec![], TotalTimeOff),
        ]),
        CommandTree::nonterm("stage-times", Some("Computation time per-stage"), vec![
          CommandTree::terminal_act("on", None, vec![], StageTimeOn),
          CommandTree::terminal_act("off", None, vec![], StageTimeOff),
        ])
      ]
    ),
    CommandTree::nonterm("lang",
      Some("switch between languages, or go directly to a langauge by name"),
      vec![
        CommandTree::nonterm_no_further_tab_completions("next", None),
        CommandTree::nonterm_no_further_tab_completions("prev", None),
        CommandTree::nonterm("go", None, vec![]),
      ]
    ),
    CommandTree::terminal_act("doc", Some("Get language-specific help for an item"), vec![], Doc),
  ])
}