use crate::commands::{JoshutoCommand, JoshutoRunnable};
use crate::context::JoshutoContext;
use crate::preview;
use crate::ui;

#[derive(Clone, Debug)]
pub struct ParentDirectory;

impl ParentDirectory {
    pub fn new() -> Self {
        ParentDirectory
    }
    pub const fn command() -> &'static str {
        "parent_directory"
    }

    pub fn parent_directory(context: &mut JoshutoContext) {
        if !context.curr_tab_mut().curr_path.pop() {
            return;
        }

        match std::env::set_current_dir(&context.curr_tab_ref().curr_path) {
            Ok(_) => {
                let curr_tab = &mut context.tabs[context.curr_tab_index];

                let curr_list = curr_tab.curr_list.take();
                curr_tab.history.put_back(curr_list);
                let parent_list = curr_tab.parent_list.take();
                curr_tab.curr_list = parent_list;

                match curr_tab.curr_path.parent() {
                    Some(parent) => {
                        curr_tab.parent_list = match curr_tab
                            .history
                            .pop_or_create(&parent, &context.config_t.sort_type)
                        {
                            Ok(s) => Some(s),
                            Err(e) => {
                                ui::wprint_err(&context.views.left_win, e.to_string().as_str());
                                None
                            }
                        };
                    }
                    None => {
                        ncurses::werase(context.views.left_win.win);
                        ncurses::wnoutrefresh(context.views.left_win.win);
                    }
                }
                curr_tab.refresh(
                    &context.views,
                    &context.config_t,
                    &context.username,
                    &context.hostname,
                );
                preview::preview_file(curr_tab, &context.views, &context.config_t);
            }
            Err(e) => {
                ui::wprint_err(&context.views.bot_win, e.to_string().as_str());
            }
        };
        ncurses::doupdate();
    }
}

impl JoshutoCommand for ParentDirectory {}

impl std::fmt::Display for ParentDirectory {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        f.write_str(Self::command())
    }
}

impl JoshutoRunnable for ParentDirectory {
    fn execute(&self, context: &mut JoshutoContext) {
        Self::parent_directory(context);
    }
}