use egui::RichText;
use xmpd_manifest::store::BaseStore;

use super::{CompGetter, CompUi};

#[derive(Debug, Default)]
pub struct LeftNav {
    pub selected_playlist_id: Option<uuid::Uuid>,
}

component_register!(LeftNav);

impl CompUi for LeftNav {
    fn draw(ui: &mut egui::Ui, state: &mut crate::GuiState) -> crate::Result<()> {
        let w = ui.available_width();
        egui::ScrollArea::vertical()
            .id_source("left_nav")
            .drag_to_scroll(false)
            .show(ui, |ui| {
                ui.vertical(|ui| {
                    let len = state.manifest.store().get_songs().len();
                    add_playlist_tab(ui, &None, "All Songs", None, len, w);
                    let mut playlists: Vec<_> = state.manifest.store().get_playlists().into_iter().collect();
                    playlists.sort_by(|a, b| {
                        let a = a.1.name().to_lowercase();
                        let b = b.1.name().to_lowercase();
                        a.cmp(&b)
                    });
                    for (pid, playlist) in playlists.iter() {
                        add_playlist_tab(ui,
                            &Some(**pid), 
                            playlist.name(),
                            Some(playlist.author()),
                            playlist.songs().len(),
                            w
                        );
                    }
                });
        });
 
        Ok(())
    }
}

fn add_playlist_tab(ui: &mut egui::Ui, pid: &Option<uuid::Uuid>, title: &str, author: Option<&str>, song_count: usize, width: f32) {
    let wdg_rect = ui.horizontal(|ui| {
        ui.set_width(width);
        ui.add_space(5.0); 
        ui.add(
            egui::Image::new(crate::data::NOTE_ICON)
                .tint(crate::data::C_ACCENT)
                .fit_to_exact_size(egui::Vec2::new(32.0, 32.0))
        );
        ui.vertical(|ui| {
            {
                if handle_error_ui!(LeftNav::get()).selected_playlist_id == *pid {
                    ui.label(
                        RichText::new(title)
                            .size(10.0)
                            .color(crate::data::C_ACCENT)
                    );
                } else {
                    ui.label(
                        RichText::new(title)
                            .size(10.0)
                    );
                }
            }
            if let Some(author) = author {
                ui.monospace(
                    RichText::new(format!("By {author}"))
                        .color(crate::data::C_TEXT_DIM)
                        .size(8.0)
                );
            }
            ui.monospace(
                RichText::new(format!("{song_count} songs"))
                    .color(crate::data::C_TEXT_DIM)
                    .size(8.0)
            );
        });
    }).response.rect;

    if ui.interact(wdg_rect, format!("left_nav_playlist_{pid:?}").into(), egui::Sense::click()).clicked() {
        handle_error_ui!(LeftNav::get()).selected_playlist_id = pid.clone();
    }
    ui.separator();
}