use std::convert::{TryFrom, TryInto};
use std::fmt::Debug;
use std::ops::Deref;

use crate::{
    artist::Artists,
    availability::Availabilities,
    copyright::Copyrights,
    error::{MetadataError, RequestError},
    external_id::ExternalIds,
    image::Images,
    request::RequestResult,
    restriction::Restrictions,
    sale_period::SalePeriods,
    track::Tracks,
    util::try_from_repeated_message,
    Metadata,
};

use librespot_core::date::Date;
use librespot_core::session::Session;
use librespot_core::spotify_id::SpotifyId;
use librespot_protocol as protocol;

use protocol::metadata::Disc as DiscMessage;

pub use protocol::metadata::Album_Type as AlbumType;

#[derive(Debug, Clone)]
pub struct Album {
    pub id: SpotifyId,
    pub name: String,
    pub artists: Artists,
    pub album_type: AlbumType,
    pub label: String,
    pub date: Date,
    pub popularity: i32,
    pub genres: Vec<String>,
    pub covers: Images,
    pub external_ids: ExternalIds,
    pub discs: Discs,
    pub reviews: Vec<String>,
    pub copyrights: Copyrights,
    pub restrictions: Restrictions,
    pub related: Albums,
    pub sale_periods: SalePeriods,
    pub cover_group: Images,
    pub original_title: String,
    pub version_title: String,
    pub type_str: String,
    pub availability: Availabilities,
}

#[derive(Debug, Clone)]
pub struct Albums(pub Vec<SpotifyId>);

impl Deref for Albums {
    type Target = Vec<SpotifyId>;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[derive(Debug, Clone)]
pub struct Disc {
    pub number: i32,
    pub name: String,
    pub tracks: Tracks,
}

#[derive(Debug, Clone)]
pub struct Discs(pub Vec<Disc>);

impl Deref for Discs {
    type Target = Vec<Disc>;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl Album {
    pub fn tracks(&self) -> Tracks {
        let result = self
            .discs
            .iter()
            .flat_map(|disc| disc.tracks.deref().clone())
            .collect();
        Tracks(result)
    }
}

#[async_trait]
impl Metadata for Album {
    type Message = protocol::metadata::Album;

    async fn request(session: &Session, album_id: SpotifyId) -> RequestResult {
        session
            .spclient()
            .get_album_metadata(album_id)
            .await
            .map_err(RequestError::Http)
    }

    fn parse(msg: &Self::Message, _: SpotifyId) -> Result<Self, MetadataError> {
        Self::try_from(msg)
    }
}

impl TryFrom<&<Self as Metadata>::Message> for Album {
    type Error = MetadataError;
    fn try_from(album: &<Self as Metadata>::Message) -> Result<Self, Self::Error> {
        Ok(Self {
            id: album.try_into()?,
            name: album.get_name().to_owned(),
            artists: album.get_artist().try_into()?,
            album_type: album.get_field_type(),
            label: album.get_label().to_owned(),
            date: album.get_date().into(),
            popularity: album.get_popularity(),
            genres: album.get_genre().to_vec(),
            covers: album.get_cover().into(),
            external_ids: album.get_external_id().into(),
            discs: album.get_disc().try_into()?,
            reviews: album.get_review().to_vec(),
            copyrights: album.get_copyright().into(),
            restrictions: album.get_restriction().into(),
            related: album.get_related().try_into()?,
            sale_periods: album.get_sale_period().into(),
            cover_group: album.get_cover_group().get_image().into(),
            original_title: album.get_original_title().to_owned(),
            version_title: album.get_version_title().to_owned(),
            type_str: album.get_type_str().to_owned(),
            availability: album.get_availability().into(),
        })
    }
}

try_from_repeated_message!(<Album as Metadata>::Message, Albums);

impl TryFrom<&DiscMessage> for Disc {
    type Error = MetadataError;
    fn try_from(disc: &DiscMessage) -> Result<Self, Self::Error> {
        Ok(Self {
            number: disc.get_number(),
            name: disc.get_name().to_owned(),
            tracks: disc.get_track().try_into()?,
        })
    }
}

try_from_repeated_message!(DiscMessage, Discs);