// yt - A fully featured command line YouTube client
//
// Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
// SPDX-License-Identifier: GPL-3.0-or-later
//
// This file is part of Yt.
//
// You should have received a copy of the License along with this program.
// If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.

use anyhow::{Context, Result};
use bytes::Bytes;

use crate::{
    app::App,
    download::Downloader,
    storage::{
        subscriptions::get_subscriptions,
        video_database::{getters::get_videos, VideoStatus},
    },
};

macro_rules! get {
    ($videos:expr, $status:ident) => {
        $videos
            .iter()
            .filter(|vid| vid.status == VideoStatus::$status)
            .count()
    };
    (@changing $videos:expr, $status:ident) => {
        $videos
            .iter()
            .filter(|vid| vid.status == VideoStatus::$status && vid.status_change)
            .count()
    };
}

pub async fn show(app: &App) -> Result<()> {
    let all_videos = get_videos(
        app,
        &[
            VideoStatus::Pick,
            //
            VideoStatus::Watch,
            VideoStatus::Cached,
            VideoStatus::Watched,
            //
            VideoStatus::Drop,
            VideoStatus::Dropped,
        ],
        None,
    )
    .await?;

    // lengths
    let picked_videos_len = get!(all_videos, Pick);

    let watch_videos_len = get!(all_videos, Watch);
    let cached_videos_len = get!(all_videos, Cached);
    let watched_videos_len = get!(all_videos, Watched);

    let drop_videos_len = get!(all_videos, Drop);
    let dropped_videos_len = get!(all_videos, Dropped);

    // changing
    let picked_videos_changing = get!(@changing all_videos, Pick);

    let watch_videos_changing = get!(@changing all_videos, Watch);
    let cached_videos_changing = get!(@changing all_videos, Cached);
    let watched_videos_changing = get!(@changing all_videos, Watched);

    let drop_videos_changing = get!(@changing all_videos, Drop);
    let dropped_videos_changing = get!(@changing all_videos, Dropped);

    let subscriptions = get_subscriptions(app).await?;
    let subscriptions_len = subscriptions.0.len();

    let cache_usage_raw = Downloader::get_current_cache_allocation(app)
        .await
        .context("Failed to get current cache allocation")?;
    let cache_usage = Bytes::new(cache_usage_raw);
    println!(
        "\
Picked   Videos: {picked_videos_len} ({picked_videos_changing} changing)

Watch    Videos: {watch_videos_len} ({watch_videos_changing} changing)
Cached   Videos: {cached_videos_len} ({cached_videos_changing} changing)
Watched  Videos: {watched_videos_len} ({watched_videos_changing} changing)

Drop     Videos: {drop_videos_len} ({drop_videos_changing} changing)
Dropped  Videos: {dropped_videos_len} ({dropped_videos_changing} changing)


  Subscriptions: {subscriptions_len}
    Cache usage: {cache_usage}"
    );

    Ok(())
}

pub fn config(app: &App) -> Result<()> {
    let config_str = toml::to_string(&app.config)?;

    print!("{}", config_str);

    Ok(())
}