#![allow(non_snake_case)]
mod app;
mod ui;

use crate::app::status::{
    AppStatus, CurrentScreen, EditingField, EntryValError, entryValError2Field,
};
use crate::ui::ui;
use app::AppState;
use color_eyre::Result;
use ratatui::Terminal;
use ratatui::crossterm::event::{
    self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyModifiers,
};
use ratatui::crossterm::execute;
use ratatui::crossterm::terminal::{
    EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode,
};
use ratatui::prelude::{Backend, CrosstermBackend};
use std::env::var;
use std::io;

fn main() -> Result<()> {
    enable_raw_mode()?;
    let mut stderr = io::stderr(); // This is a special case. Normally using stdout is fine
    execute!(stderr, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stderr);
    let mut terminal = Terminal::new(backend)?;

    let configHome = var("XDG_CONFIG_HOME")
        .or_else(|_| var("HOME").map(|home| format!("{home}/.config")))
        .unwrap_or("~/.config".to_string());
    // create app and run it
    let mut appSettings = AppState::new(format!("{configHome}/steckbrett.conf"));
    // app.load();
    let _ = runApp(&mut appSettings, &mut terminal);
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    // match res {
    //     Ok(ent) => println!("{ent} entries "),
    //     _ => {}
    // }

    Ok(())
}

fn runApp<B: Backend>(app: &mut AppState, terminal: &mut Terminal<B>) -> Result<usize> {
    loop {
        terminal.draw(|f| ui(f, app))?; // from ui.rs
        if let Event::Key(key) = event::read()? {
            // println!("{key:?}");
            if key.kind == event::KeyEventKind::Release {
                continue;
            }

            match app.screen {
                CurrentScreen::Settings => match key.code {
                    KeyCode::Home | KeyCode::Char('m') | KeyCode::Esc => {
                        app.screen = CurrentScreen::Main;
                    }
                    _ => {}
                },
                CurrentScreen::Delete => match key.code {
                    KeyCode::Up => app.prevRow(),
                    KeyCode::Down => app.nextRow(),
                    KeyCode::Enter => app.delCur(),
                    KeyCode::Esc => app.screen = CurrentScreen::Main,
                    _ => {}
                },
                CurrentScreen::Main => match key.code {
                    KeyCode::Char('a') => {
                        app.screen = CurrentScreen::Add;
                        app.currentlyEditing = Some(EditingField::FromIP);
                        app.appStatus = AppStatus::Editing;
                    }
                    KeyCode::Char('q') | KeyCode::F(10) | KeyCode::Esc => {
                        app.screen = CurrentScreen::Exit
                    }
                    KeyCode::Char('s') => {
                        if app.isHashDifferent() {
                            app.screen = CurrentScreen::SaveConfirm;
                        }
                    }
                    KeyCode::F(2) => app.screen = CurrentScreen::Settings,
                    KeyCode::Char('d') => app.screen = CurrentScreen::Delete,
                    KeyCode::Up => app.prevRow(),
                    KeyCode::Down => app.nextRow(),
                    _ => {}
                },
                CurrentScreen::Add => match (key.modifiers, key.code) {
                    (KeyModifiers::NONE, KeyCode::Enter) => {
                        if let Some(eF) = &app.currentlyEditing {
                            match eF {
                                EditingField::ToPort => {
                                    let res = app.store();
                                    match res {
                                        EntryValError::None => {
                                            app.screen = CurrentScreen::Main;
                                            app.currentlyEditing = None;
                                            app.appStatus = AppStatus::Added;
                                        }
                                        _ => {
                                            app.currentlyEditing = Some(entryValError2Field(&res));
                                            app.appStatus = AppStatus::Error(res);
                                        }
                                    }
                                }
                                _ => app.nextField(),
                            }
                        }
                    }
                    (KeyModifiers::NONE, KeyCode::Backspace) => {
                        if let Some(eF) = &app.currentlyEditing {
                            match eF {
                                EditingField::FromIP => {
                                    app.fromIP.pop();
                                }
                                EditingField::FromPort => {
                                    app.fromPort.pop();
                                }
                                EditingField::ToIP => {
                                    app.toIP.pop();
                                }
                                EditingField::ToPort => {
                                    app.toPort.pop();
                                }
                            };
                        }
                    }
                    (KeyModifiers::NONE, KeyCode::Esc) => {
                        app.screen = CurrentScreen::Main;
                        app.currentlyEditing = None;
                    }
                    (KeyModifiers::NONE, KeyCode::Tab | KeyCode::Right) => app.nextField(),
                    (KeyModifiers::NONE, KeyCode::Left) => app.prevField(),
                    (KeyModifiers::SHIFT, KeyCode::Tab) => app.prevField(),
                    (_, KeyCode::Char(v)) => {
                        if let Some(e) = &app.currentlyEditing {
                            let mut isIP = false;
                            let opField = match e {
                                EditingField::FromIP => {
                                    isIP = true;
                                    &mut app.fromIP
                                }
                                EditingField::FromPort => &mut app.fromPort,
                                EditingField::ToIP => {
                                    isIP = true;
                                    &mut app.toIP
                                }
                                EditingField::ToPort => &mut app.toPort,
                            };
                            match v {
                                'l' => {
                                    if isIP {
                                        opField.clear();
                                        opField.push_str("127.0.0.1");
                                    }
                                }
                                'o' => {
                                    if isIP {
                                        opField.clear();
                                        opField.push_str("0.0.0.0");
                                    }
                                }
                                'c' => opField.clear(),
                                'C' => {
                                    app.fromIP.clear();
                                    app.toIP.clear();
                                    app.fromPort.clear();
                                    app.toPort.clear();
                                }
                                _ => opField.push(v),
                            }
                        }
                    }
                    _ => {}
                },
                CurrentScreen::SaveConfirm => match key.code {
                    KeyCode::Enter => {
                        app.saveConfigToScript();
                        app.saveConfigToSettingsFile();
                        app.appStatus = AppStatus::Saved;
                        terminal.clear()?;
                        app.screen = CurrentScreen::Main;
                    }
                    KeyCode::Esc => app.screen = CurrentScreen::Main,
                    _ => {}
                },
                CurrentScreen::Exit => match key.code {
                    KeyCode::Enter => {
                        // app.saveConfigToSettingsFile();
                        // app.saveConfigToScript();
                        return Ok(app.settings.entries.len());
                    }
                    KeyCode::Esc | KeyCode::Char('m') => app.screen = CurrentScreen::Main,
                    _ => {}
                },
            }
        }
    }
    // app.run(terminal)
}