/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2025 metamuffin <metamuffin.org>
*/
use super::{
    account::session::{token, Session},
    layout::LayoutPage,
};
use crate::{
    database::Database,
    routes::{
        stream::rocket_uri_macro_r_stream,
        ui::{assets::rocket_uri_macro_r_item_backdrop, error::MyResult, layout::DynLayoutPage},
    },
    uri,
};
use anyhow::anyhow;
use jellybase::{permission::PermissionSetExt, CONF};
use jellycommon::{
    stream::{StreamFormat, StreamSpec},
    user::{PermissionSet, PlayerKind, UserPermission},
    Node, SourceTrackKind, TrackID,
};
use markup::DynRender;
use rocket::{get, response::Redirect, Either, FromForm, State, UriDisplayQuery};
use std::sync::Arc;

#[derive(FromForm, Default, Clone, Debug, UriDisplayQuery)]
pub struct PlayerConfig {
    pub a: Option<TrackID>,
    pub v: Option<TrackID>,
    pub s: Option<TrackID>,
    pub t: Option<f64>,
    pub kind: Option<PlayerKind>,
}

impl PlayerConfig {
    pub fn seek(t: f64) -> Self {
        Self {
            t: Some(t),
            ..Default::default()
        }
    }
}

fn jellynative_url(action: &str, seek: f64, secret: &str, node: &str, session: &str) -> String {
    let protocol = if CONF.tls { "https" } else { "http" };
    let host = &CONF.hostname;
    let stream_url = uri!(r_stream(
        node,
        StreamSpec {
            format: StreamFormat::HlsMaster,
            ..Default::default()
        }
    ));
    format!("jellynative://{action}/{secret}/{session}/{seek}/{protocol}://{host}{stream_url}",)
}

#[get("/n/<id>/player?<conf..>", rank = 4)]
pub fn r_player<'a>(
    sess: Session,
    db: &'a State<Database>,
    id: &'a str,
    conf: PlayerConfig,
) -> MyResult<Either<DynLayoutPage<'a>, Redirect>> {
    let item = db
        .get_node_slug(id)?
        .ok_or(anyhow!("node does not exist"))?;

    let native_session = |action: &str| {
        let perm = [
            UserPermission::StreamFormat(StreamFormat::HlsMaster),
            UserPermission::StreamFormat(StreamFormat::HlsVariant),
            UserPermission::StreamFormat(StreamFormat::Fragment),
        ];
        for perm in &perm {
            sess.user.permissions.assert(perm)?;
        }
        Ok(Either::Right(Redirect::temporary(jellynative_url(
            action,
            conf.t.unwrap_or(0.),
            &sess.user.native_secret,
            id,
            &token::create(
                sess.user.name,
                PermissionSet(perm.map(|e| (e, true)).into()),
                chrono::Duration::hours(24),
            ),
        ))))
    };

    match conf.kind.unwrap_or(sess.user.player_preference) {
        PlayerKind::Browser => (),
        PlayerKind::Native => {
            return native_session("player-v2");
        }
        PlayerKind::NativeFullscreen => {
            return native_session("player-fullscreen-v2");
        }
    }

    let spec = StreamSpec {
        track: None
            .into_iter()
            .chain(conf.v)
            .chain(conf.a)
            .chain(conf.s)
            .collect::<Vec<_>>(),
        format: StreamFormat::Matroska,
        webm: Some(true),
        ..Default::default()
    };

    let playing = !spec.track.is_empty();

    let conf = player_conf(item.clone(), playing)?;
    Ok(Either::Left(LayoutPage {
        title: item.title.to_owned().unwrap_or_default(),
        class: Some("player"),
        content: markup::new! {
            @if playing {
                video[src=uri!(r_stream(&id, &spec)), controls, preload="auto"]{}
            } else {
                img.backdrop[src=uri!(r_item_backdrop(&id, Some(2048))).to_string()];
            }
            @conf
        },
    }))
}

pub fn player_conf<'a>(item: Arc<Node>, playing: bool) -> anyhow::Result<DynRender<'a>> {
    let mut audio_tracks = vec![];
    let mut video_tracks = vec![];
    let mut sub_tracks = vec![];
    let tracks = item
        .media
        .clone()
        .ok_or(anyhow!("node does not have media"))?
        .tracks
        .clone();
    for (tid, track) in tracks.into_iter().enumerate() {
        match &track.kind {
            SourceTrackKind::Audio { .. } => audio_tracks.push((tid, track)),
            SourceTrackKind::Video { .. } => video_tracks.push((tid, track)),
            SourceTrackKind::Subtitles { .. } => sub_tracks.push((tid, track)),
        }
    }

    Ok(markup::new! {
        form.playerconf[method = "GET", action = ""] {
            h2 { "Select tracks for " @item.title }

            fieldset.video {
                legend { "Video" }
                @for (i, (tid, track)) in video_tracks.iter().enumerate() {
                    input[type="radio", id=tid, name="v", value=tid, checked=i==0];
                    label[for=tid] { @format!("{track}") } br;
                }
                input[type="radio", id="v-none", name="v", value=""];
                label[for="v-none"] { "No video" }
            }

            fieldset.audio {
                legend { "Audio" }
                @for (i, (tid, track)) in audio_tracks.iter().enumerate() {
                    input[type="radio", id=tid, name="a", value=tid, checked=i==0];
                    label[for=tid] { @format!("{track}") } br;
                }
                input[type="radio", id="a-none", name="a", value=""];
                label[for="a-none"] { "No audio" }
            }

            fieldset.subtitles {
                legend { "Subtitles" }
                @for (_i, (tid, track)) in sub_tracks.iter().enumerate() {
                    input[type="radio", id=tid, name="s", value=tid];
                    label[for=tid] { @format!("{track}") } br;
                }
                input[type="radio", id="s-none", name="s", value="", checked=true];
                label[for="s-none"] { "No subtitles" }
            }

            input[type="submit", value=if playing { "Change tracks" } else { "Start playback" }];
        }
    })
}