use crate::repl::command_tree::CommandTree;
use crate::repl::directive_actions::DirectiveAction;

pub fn directives_from_pass_names(pass_names: &Vec<String>) -> CommandTree {
    let passes_directives: Vec<CommandTree> = pass_names
        .iter()
        .map(|pass_name| {
            if pass_name == "parsing" {
                CommandTree::nonterm(
                    pass_name,
                    None,
                    vec![
                        CommandTree::nonterm_no_further_tab_completions("compact", None),
                        CommandTree::nonterm_no_further_tab_completions("expanded", None),
                        CommandTree::nonterm_no_further_tab_completions("trace", None),
                    ],
                )
            } else {
                CommandTree::nonterm_no_further_tab_completions(pass_name, None)
            }
        })
        .collect();
    CommandTree::Top(get_list(&passes_directives, true))
}

fn get_list(passes_directives: &Vec<CommandTree>, include_help: bool) -> Vec<CommandTree> {
    use DirectiveAction::*;

    vec![
        CommandTree::terminal("exit", Some("exit the REPL"), vec![], QuitProgram),
        CommandTree::terminal("quit", Some("exit the REPL"), vec![], QuitProgram),
        CommandTree::terminal(
            "help",
            Some("Print this help message"),
            if include_help {
                get_list(passes_directives, false)
            } else {
                vec![]
            },
            Help,
        ),
        CommandTree::nonterm(
            "debug",
            Some("Configure debug information"),
            vec![
                CommandTree::terminal(
                    "list-passes",
                    Some("List all registered compiler passes"),
                    vec![],
                    ListPasses,
                ),
                CommandTree::terminal(
                    "show-immediate",
                    None,
                    passes_directives.clone(),
                    ShowImmediate,
                ),
                CommandTree::terminal(
                    "show",
                    Some("Show debug output for a specific pass"),
                    passes_directives.clone(),
                    Show,
                ),
                CommandTree::terminal(
                    "hide",
                    Some("Hide debug output for a specific pass"),
                    passes_directives.clone(),
                    Hide,
                ),
                CommandTree::nonterm(
                    "total-time",
                    None,
                    vec![
                        CommandTree::terminal("on", None, vec![], TotalTimeOn),
                        CommandTree::terminal("off", None, vec![], TotalTimeOff),
                    ],
                ),
                CommandTree::nonterm(
                    "stage-times",
                    Some("Computation time per-stage"),
                    vec![
                        CommandTree::terminal("on", None, vec![], StageTimeOn),
                        CommandTree::terminal("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(
            "doc",
            Some("Get language-specific help for an item"),
            vec![],
            Doc,
        ),
    ]
}