use crate::*;
use tengri::tui::ratatui::{style::{Color, Style}, prelude::Stylize};
pub(crate) use pad::PadStr;

mod column; pub use self::column::*;
mod string; pub use self::string::*;

impl Content<TuiOut> for Taggart {
    fn content (&self) -> impl Render<TuiOut> {
        let sizer    = Fill::xy(&self.size);
        let size     = format!("{}x{}", self.size.w(), self.size.h());
        let size_bar = status_bar(Align::e(size));
        let titlebar = status_bar(Align::w(self.columns.header()));
        Bsp::n(size_bar, Bsp::s(titlebar, Bsp::b(sizer, Fill::xy(TreeTable(self)))))
    }
}

struct TreeTable<'a>(&'a Taggart);

impl<'a> Content<TuiOut> for TreeTable<'a> {
    fn render (&self, to: &mut TuiOut) {
        let area = to.area();
        let Taggart { offset, paths, cursor, column, .. } = self.0;
        let (x, w) = self.0.columns.xw(*column);
        to.fill_bg([area.x() + x, area.y(), w, area.h()], Color::Rgb(0, 0, 0));
        for (i, y) in area.iter_y().enumerate() {
            let i_offset = i + offset;
            let selected = *cursor == i_offset;
            if let Some(entry) = paths.get(i_offset) {
                for (index, _fragment) in entry.path.iter().enumerate() {
                    if index == entry.depth - 1 {
                        let _cursor = if selected { ">" } else { " " };
                        let label = self.0.columns.row_content(&entry);
                        Content::render(&label)
                        to.blit(&label, area.x(), y, entry.style());
                        if selected {
                            let fill = [area.x(), y, area.w(), 1];
                            to.fill_fg(fill, Color::Rgb(0, 0, 0));
                            to.fill_bg(fill, Color::Rgb(192, 128, 0));
                            let fill = [area.x() + x as u16, y, w, 1];
                            to.fill_bg(fill, Color::Rgb(224, 192, 0));
                            if let Some((_index, value)) = &self.0.editing {
                                let x = area.x() + if x > 0 { x + 1 } else { x } as u16;
                                to.blit(&value, x, y, None)
                            }
                        }
                    }
                }
            } else {
                break
            }
        }
    }
}

impl Entry {
    pub fn name (&self) -> Option<Arc<str>> {
        let indent = "".pad_to_width((self.depth - 1) * 2);
        let icon   = self.icon();
        let name   = self.path.iter().last().expect("empty path").display();
        Some(format!("{indent}{icon} {name}").into())
    }
    fn icon (&self) -> &'static str {
        if self.is_dir() {
            "" //"+"
        } else if self.is_img() {
            ""
        } else if self.is_mus() {
            ""
        } else {
            "⁇"
        }
    }
    fn style (&self) -> Option<Style> {
        if self.is_dir() {
            None
        } else {
            Some(Style::default().bold())
        }
    }
}

fn status_bar (content: impl Content<TuiOut>) -> impl Content<TuiOut> {
    Fixed::y(1, Fill::x(Tui::bold(true, Tui::fg_bg(Color::Rgb(0,0,0), Color::Rgb(255,255,255), content))))
}