//! Get all of a broadcaster’s subscriptions.
//! [`get-broadcaster-subscriptions`](https://dev.twitch.tv/docs/api/reference#get-broadcaster-subscriptions)
//!
//! # Accessing the endpoint
//!
//! ## Request: [GetBroadcasterSubscriptionsRequest]
//!
//! To use this endpoint, construct a [`GetBroadcasterSubscriptionsRequest`] with the [`GetBroadcasterSubscriptionsRequest::builder()`] method.
//!
//! ```rust
//! use twitch_api2::helix::subscriptions::get_broadcaster_subscriptions;
//! let request = get_broadcaster_subscriptions::GetBroadcasterSubscriptionsRequest::builder()
//!     .broadcaster_id("1234")
//!     .build();
//! ```
//!
//! ## Response: [BroadcasterSubscription]
//!
//! Send the request to receive the response with [`HelixClient::req_get()`](helix::HelixClient::req_get).
//!
//! ```rust, no_run
//! use twitch_api2::helix::{self, subscriptions::get_broadcaster_subscriptions};
//! # use twitch_api2::client;
//! # #[tokio::main]
//! # async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>> {
//! # let client: helix::HelixClient<'static, client::DummyHttpClient> = helix::HelixClient::default();
//! # let token = twitch_oauth2::AccessToken::new("validtoken".to_string());
//! # let token = twitch_oauth2::UserToken::from_existing(&client, token, None, None).await?;
//! let request = get_broadcaster_subscriptions::GetBroadcasterSubscriptionsRequest::builder()
//!     .broadcaster_id("1234")
//!     .build();
//! let response: Vec<get_broadcaster_subscriptions::BroadcasterSubscription> = client.req_get(request, &token).await?.data;
//! # Ok(())
//! # }
//! ```
//!
//! You can also get the [`http::Request`] with [`request.create_request(&token, &client_id)`](helix::RequestGet::create_request)
//! and parse the [`http::Response`] with [`GetBroadcasterSubscriptionsRequest::parse_response(None, &request.get_uri(), response)`](GetBroadcasterSubscriptionsRequest::parse_response)

use super::*;
use helix::RequestGet;
/// Query Parameters for [Get Broadcaster Subscriptions](super::get_broadcaster_subscriptions)
///
/// [`get-broadcaster-subscriptions`](https://dev.twitch.tv/docs/api/reference#get-broadcaster-subscriptions)
#[derive(PartialEq, typed_builder::TypedBuilder, Deserialize, Serialize, Clone, Debug)]
#[non_exhaustive]
pub struct GetBroadcasterSubscriptionsRequest {
    /// User ID of the broadcaster. Must match the User ID in the Bearer token.
    #[builder(setter(into))]
    pub broadcaster_id: types::UserId,
    /// Unique identifier of account to get subscription status of. Accepts up to 100 values.
    #[builder(default)]
    pub user_id: Vec<types::UserId>,
    /// Cursor for forward pagination: tells the server where to start fetching the next set of results, in a multi-page response. The cursor value specified here is from the pagination response field of a prior query.
    #[builder(default)]
    pub after: Option<helix::Cursor>,
    /// Number of values to be returned per page. Limit: 100. Default: 20.
    #[builder(setter(into), default)]
    pub first: Option<String>,
}

/// Return Values for [Get Broadcaster Subscriptions](super::get_broadcaster_subscriptions)
///
/// [`get-broadcaster-subscriptions`](https://dev.twitch.tv/docs/api/reference#get-broadcaster-subscriptions)
#[derive(PartialEq, Deserialize, Serialize, Debug, Clone)]
#[cfg_attr(feature = "deny_unknown_fields", serde(deny_unknown_fields))]
#[non_exhaustive]
pub struct BroadcasterSubscription {
    /// User ID of the broadcaster.
    pub broadcaster_id: types::UserId,
    /// Login of the broadcaster.
    pub broadcaster_login: types::UserName,
    /// Display name of the broadcaster.
    pub broadcaster_name: types::DisplayName,
    /// User ID of the broadcaster.
    #[serde(
        default,
        deserialize_with = "helix::deserialize_none_from_empty_string"
    )]
    pub gifter_id: Option<types::UserId>,
    /// Login of the gifter.
    #[serde(
        default,
        deserialize_with = "helix::deserialize_none_from_empty_string"
    )]
    pub gifter_login: Option<types::UserName>,
    /// Display name of the gifter.
    #[serde(
        default,
        deserialize_with = "helix::deserialize_none_from_empty_string"
    )]
    pub gifter_name: Option<types::DisplayName>,
    /// Determines if the subscription is a gift subscription.
    pub is_gift: bool,
    /// Type of subscription (Tier 1, Tier 2, Tier 3). 1000 = Tier 1, 2000 = Tier 2, 3000 = Tier 3 subscriptions.
    pub tier: types::SubscriptionTier,
    /// Name of the subscription.
    pub plan_name: String,
    /// ID of the subscribed user.
    pub user_id: types::UserId,
    /// Login of the subscribed user.
    pub user_login: types::UserName,
    /// Display name of the subscribed user.
    pub user_name: types::DisplayName,
}

impl Request for GetBroadcasterSubscriptionsRequest {
    type Response = Vec<BroadcasterSubscription>;

    const PATH: &'static str = "subscriptions";
    #[cfg(feature = "twitch_oauth2")]
    const SCOPE: &'static [twitch_oauth2::Scope] =
        &[twitch_oauth2::Scope::ChannelReadSubscriptions];
}

impl RequestGet for GetBroadcasterSubscriptionsRequest {}

impl helix::Paginated for GetBroadcasterSubscriptionsRequest {
    fn set_pagination(&mut self, cursor: Option<helix::Cursor>) { self.after = cursor }
}

impl helix::Response<GetBroadcasterSubscriptionsRequest, Vec<BroadcasterSubscription>> {
    /// The current number of subscriber points earned by this broadcaster.
    pub fn points(&self) -> Result<i64, BroadcasterSubscriptionPointsError> {
        let points = self.get_other("points")?;
        if let Some(points) = points {
            Ok(points)
        } else {
            Err(BroadcasterSubscriptionPointsError::PointsNotFound)
        }
    }
}

/// Errors when retrieving `points` in [Get Broadcaster Subscriptions](self)
#[derive(Debug, thiserror::Error)]
pub enum BroadcasterSubscriptionPointsError {
    /// Deserialization error
    #[error(transparent)]
    DeserError(#[from] serde_json::Error),
    /// `points` not found in the response
    #[error("`points` not found in the response")]
    PointsNotFound,
}

#[cfg(test)]
#[test]
fn test_request() {
    use helix::*;
    let req = GetBroadcasterSubscriptionsRequest::builder()
        .broadcaster_id("123".to_string())
        .build();

    // From twitch docs. Example has ...
    let data = br#"
    {
        "data": [
          {
            "broadcaster_id": "141981764",
            "broadcaster_login": "twitchdev",
            "broadcaster_name": "TwitchDev",
            "gifter_id": "12826",
            "gifter_login": "twitch",
            "gifter_name": "Twitch",
            "is_gift": true,
            "tier": "1000",
            "plan_name": "Channel Subscription (twitchdev)",
            "user_id": "527115020",
            "user_name": "twitchgaming",
            "user_login": "twitchgaming"
          }
        ],
        "pagination": {
          "cursor": "xxxx"
        },
        "total": 13,
        "points": 13
      }
"#
    .to_vec();

    let http_response = http::Response::builder().body(data).unwrap();

    let uri = req.get_uri().unwrap();
    assert_eq!(
        uri.to_string(),
        "https://api.twitch.tv/helix/subscriptions?broadcaster_id=123"
    );

    let resp =
        dbg!(
            GetBroadcasterSubscriptionsRequest::parse_response(Some(req), &uri, http_response)
                .unwrap()
        );
    assert_eq!(resp.total, Some(13));
    assert_eq!(resp.points().unwrap(), 13);
}