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//! Mod comments interface

use serde::ser::{SerializeMap, Serializer};
use serde::Serialize;

use crate::prelude::*;
use crate::types::id::{CommentId, GameId, ModId};
pub use crate::types::mods::Comment;

/// Interface for comments of a mod.
#[derive(Clone)]
pub struct Comments {
    modio: Modio,
    game: GameId,
    mod_id: ModId,
}

impl Comments {
    pub(crate) fn new(modio: Modio, game: GameId, mod_id: ModId) -> Self {
        Self {
            modio,
            game,
            mod_id,
        }
    }

    /// Returns a `Query` interface to retrieve all comments.
    ///
    /// See [Filters and sorting](filters).
    pub fn search(&self, filter: Filter) -> Query<Comment> {
        let route = Route::GetModComments {
            game_id: self.game,
            mod_id: self.mod_id,
        };
        Query::new(self.modio.clone(), route, filter)
    }

    /// Return comment by id.
    pub async fn get(self, id: CommentId) -> Result<Comment> {
        let route = Route::GetModComment {
            game_id: self.game,
            mod_id: self.mod_id,
            comment_id: id,
        };
        self.modio.request(route).send().await
    }

    /// Add a new comment. [required: token]
    pub async fn add<S>(self, content: S, reply_id: Option<CommentId>) -> Result<Comment>
    where
        S: Into<String>,
    {
        let route = Route::AddModComment {
            game_id: self.game,
            mod_id: self.mod_id,
        };
        let content = content.into();
        let data = CommentOptions { content, reply_id };
        self.modio.request(route).form(&data).send().await
    }

    /// Edit a comment by id. [required: token]
    pub async fn edit<S>(self, id: CommentId, content: S) -> Result<Comment>
    where
        S: Into<String>,
    {
        let route = Route::EditModComment {
            game_id: self.game,
            mod_id: self.mod_id,
            comment_id: id,
        };
        let data = CommentOptions {
            content: content.into(),
            reply_id: None,
        };
        self.modio.request(route).form(&data).send().await
    }

    /// Delete a comment by id. [required: token]
    pub async fn delete(self, id: CommentId) -> Result<()> {
        let route = Route::DeleteModComment {
            game_id: self.game,
            mod_id: self.mod_id,
            comment_id: id,
        };
        self.modio.request(route).send().await
    }

    /// Update the karma for a comment. [required: token]
    pub async fn karma(self, id: CommentId, karma: Karma) -> Result<Editing<Comment>> {
        let route = Route::AddModCommentKarma {
            game_id: self.game,
            mod_id: self.mod_id,
            comment_id: id,
        };
        self.modio
            .request(route)
            .form(&karma)
            .send()
            .await
            .map(Editing::Entity)
            .or_else(|e| match (e.status(), e.error_ref()) {
                (Some(StatusCode::FORBIDDEN), Some(15059)) => Ok(Editing::NoChanges),
                _ => Err(e),
            })
    }
}

/// Comment filters and sorting.
///
/// # Filters
/// - `Fulltext`
/// - `Id`
/// - `ModId`
/// - `SubmittedBy`
/// - `DateAdded`
/// - `ReplyId`
/// - `ThreadPosition`
/// - `Karma`
/// - `Content`
///
/// # Sorting
/// - `Id`
/// - `ModId`
/// - `SubmittedBy`
/// - `DateAdded`
///
/// See [modio docs](https://docs.mod.io/#get-mod-comments) for more information.
///
/// By default this returns up to `100` items. You can limit the result by using `limit` and
/// `offset`.
///
/// # Example
/// ```
/// use modio::filter::prelude::*;
/// use modio::comments::filters::Id;
///
/// let filter = Id::_in(vec![1, 2]).order_by(Id::desc());
/// ```
#[rustfmt::skip]
pub mod filters {
    #[doc(inline)]
    pub use crate::filter::prelude::Fulltext;
    #[doc(inline)]
    pub use crate::filter::prelude::Id;
    #[doc(inline)]
    pub use crate::filter::prelude::ModId;
    #[doc(inline)]
    pub use crate::filter::prelude::DateAdded;
    #[doc(inline)]
    pub use crate::filter::prelude::SubmittedBy;

    filter!(ReplyId, REPLY_ID, "reply_id", Eq, NotEq, In, Cmp);
    filter!(ThreadPosition, THREAD_POSITION, "thread_position", Eq, NotEq, In, Like);
    filter!(Karma, KARMA, "karma", Eq, NotEq, In, Cmp);
    filter!(Content, CONTENT, "content", Eq, NotEq, Like);
}

pub enum Karma {
    Positive,
    Negative,
}

impl Serialize for Karma {
    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        let mut s = serializer.serialize_map(Some(1))?;
        match self {
            Self::Positive => s.serialize_entry("karma", &1)?,
            Self::Negative => s.serialize_entry("karma", &-1)?,
        }
        s.end()
    }
}

#[derive(Serialize)]
struct CommentOptions {
    content: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    reply_id: Option<CommentId>,
}