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use termion::event::{Event, Key, MouseEvent};

use crate::coordinates::{Coordinates, Position, Size};

pub trait Widget {
    //fn render(&self) -> Vec<String>;
    fn get_size(&self) -> &Size;
    fn get_position(&self) -> &Position;
    fn set_size(&mut self, size: Size);
    fn set_position(&mut self, position: Position);
    fn get_coordinates(&self) -> &Coordinates;
    fn set_coordinates(&mut self, coordinates: &Coordinates);
    fn render_header(&self) -> String;

    fn on_event(&mut self, event: Event) {
        match event {
            Event::Key(Key::Char('q')) => panic!("It's your fault!"),
            Event::Key(key) => self.on_key(key),
            Event::Mouse(button) => self.on_mouse(button),
            Event::Unsupported(wtf) => self.on_wtf(wtf),
        }
    }

    fn on_key(&mut self, key: Key) {
        match key {
            _ => self.bad(Event::Key(key)),
        }
    }

    fn on_mouse(&mut self, event: MouseEvent) {
        match event {
            _ => self.bad(Event::Mouse(event)),
        }
    }

    fn on_wtf(&mut self, event: Vec<u8>) {
        match event {
            _ => self.bad(Event::Unsupported(event)),
        }
    }

    fn show_status(&self, status: &str) {
        crate::window::show_status(status);
    }

    fn minibuffer(&self, query: &str) -> Option<String> {
        crate::window::minibuffer(query)
    }

    fn bad(&mut self, event: Event) {
        self.show_status(&format!("Stop the nasty stuff!! {:?} does nothing!", event));
    }

    fn get_header_drawlist(&mut self) -> String {
        format!(
            "{}{}{}{:xsize$}",
            crate::term::goto_xy(1, 1),
            crate::term::header_color(),
            self.render_header(),
            " ",
            xsize = self.get_size().xsize() as usize
        )
    }

    fn get_clearlist(&self) -> String {
        let (xpos, ypos) = self.get_position().position();
        let (xsize, ysize) = self.get_size().size();

        (ypos..ysize + 2)
            .map(|line| {
                format!(
                    "{}{}{:xsize$}",
                    crate::term::reset(),
                    crate::term::goto_xy(xpos, line),
                    " ",
                    xsize = xsize as usize
                )
            })
            .collect()
    }

    fn get_redraw_empty_list(&self, lines: usize) -> String {
        let (xpos, ypos) = self.get_position().position();
        let (xsize, ysize) = self.get_size().size();

        let start_y = lines + ypos as usize;
        (start_y..(ysize + 2) as usize)
            .map(|i| {
                format!(
                    "{}{:xsize$}",
                    crate::term::goto_xy(xpos, i as u16),
                    " ",
                    xsize = xsize as usize
                )
            })
            .collect()
    }

    fn refresh(&mut self);
    fn get_drawlist(&self) -> String;
}