use ratatui::text::{Line, Span};

use super::{
    settings::{color_settings::ColorSettings, key_settings::KeySettings},
    App,
};

#[derive(Debug, Clone)]
pub struct HelpLine {
    pub command: String,
    pub description: String,
}

impl HelpLine {
    pub fn new(command: &str, description: &str) -> Self {
        Self {
            command: command.to_string(),
            description: description.to_string(),
        }
    }

    pub fn to_line(&self, color_settings: &ColorSettings) -> Line<'static> {
        let mut line = Line::default();
        line.spans.push(Span::styled(
            self.command.to_string(),
            color_settings.help_command,
        ));
        line.spans
            .push(Span::styled(": ", color_settings.menu_text));
        line.spans.push(Span::styled(
            self.description.clone(),
            color_settings.menu_text,
        ));
        line.left_aligned()
    }
}

impl App {
    pub fn key_event_to_string(event: crossterm::event::KeyEvent) -> String {
        let mut result = String::new();
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::CONTROL)
        {
            result.push_str("Ctrl+");
        }
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::ALT)
        {
            result.push_str("Alt+");
        }
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::SHIFT)
        {
            result.push_str("Shift+");
        }
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::SUPER)
        {
            result.push_str("Super+");
        }
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::HYPER)
        {
            result.push_str("Hyper+");
        }
        if event
            .modifiers
            .contains(crossterm::event::KeyModifiers::META)
        {
            result.push_str("Meta+");
        }

        result.push_str(&match event.code {
            crossterm::event::KeyCode::Left => "←".into(),
            crossterm::event::KeyCode::Right => "→".into(),
            crossterm::event::KeyCode::Up => "↑".into(),
            crossterm::event::KeyCode::Down => "↓".into(),
            crossterm::event::KeyCode::F(n) => {
                format!("F{}", n)
            }
            crossterm::event::KeyCode::Char(c) => match c {
                ' ' => "Space".into(),
                '\t' => "Tab".into(),
                '\n' => "LF".into(),
                '\r' => "CR".into(),
                _ => c.to_ascii_uppercase().to_string(),
            },
            c => format!("{:?}", c),
        });
        result
    }

    pub(super) fn help_list(key_settings: &KeySettings) -> Vec<HelpLine> {
        vec![
            HelpLine::new(&Self::key_event_to_string(key_settings.up), "Move up"),
            HelpLine::new(&Self::key_event_to_string(key_settings.down), "Move down"),
            HelpLine::new(&Self::key_event_to_string(key_settings.left), "Move left"),
            HelpLine::new(&Self::key_event_to_string(key_settings.right), "Move right"),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.next),
                "Next instruction or block",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.previous),
                "Previous instruction or block",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.page_up),
                "Scroll up",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.page_down),
                "Scroll down",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.goto_start),
                "Scroll to start",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.goto_end),
                "Scroll to end",
            ),
            HelpLine::new(&Self::key_event_to_string(key_settings.run), "Run command"),
            HelpLine::new(&Self::key_event_to_string(key_settings.save), "Save"),
            HelpLine::new(&Self::key_event_to_string(key_settings.save_as), "Save as"),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.save_and_quit),
                "Save and quit",
            ),
            HelpLine::new(&Self::key_event_to_string(key_settings.quit), "Quit"),
            HelpLine::new(&Self::key_event_to_string(key_settings.open), "Open file"),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.change_view),
                "Change view",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.jump),
                "Jump to location",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.find_symbol),
                "Search symbol",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.find_text),
                "Search text",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.patch_text),
                "Patch text",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.patch_assembly),
                "Patch assembly",
            ),
            HelpLine::new(&Self::key_event_to_string(key_settings.log), "Open log"),
            HelpLine::new(&Self::key_event_to_string(key_settings.confirm), "Confirm"),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.close_popup),
                "Close popup",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.new_line),
                "Insert new line (with multiline text)",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.clear_log),
                "Clear log (with log open)",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.undo),
                "Undo last change",
            ),
            HelpLine::new(
                &Self::key_event_to_string(key_settings.redo),
                "Redo last change",
            ),
            HelpLine::new(&Self::key_event_to_string(key_settings.help), "Help"),
        ]
    }
}