use super::*;
use crate::cache::Cache;
use crate::model::{
    Error, Result,
    auth::User,
    permissions::FinePermission,
    reactions::{AssetType, Reaction},
};
use crate::{auto_method, execute, get, query_row};

#[cfg(feature = "sqlite")]
use rusqlite::Row;

#[cfg(feature = "postgres")]
use tokio_postgres::Row;

impl DataManager {
    /// Get a [`Reaction`] from an SQL row.
    pub(crate) fn get_reaction_from_row(
        #[cfg(feature = "sqlite")] x: &Row<'_>,
        #[cfg(feature = "postgres")] x: &Row,
    ) -> Reaction {
        Reaction {
            id: get!(x->0(i64)) as usize,
            created: get!(x->1(i64)) as usize,
            owner: get!(x->2(i64)) as usize,
            asset: get!(x->3(i64)) as usize,
            asset_type: serde_json::from_str(&get!(x->4(String))).unwrap(),
            is_like: if get!(x->5(i8)) == 1 { true } else { false },
        }
    }

    auto_method!(get_reaction_by_id()@get_reaction_from_row -> "SELECT * FROM reactions WHERE id = $1" --name="reaction" --returns=Reaction --cache-key-tmpl="atto.reaction:{}");

    /// Get a reaction by `owner` and `asset`.
    pub async fn get_reaction_by_owner_asset(
        &self,
        owner: usize,
        asset: usize,
    ) -> Result<Reaction> {
        let conn = match self.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        let res = query_row!(
            &conn,
            "SELECT * FROM reactions WHERE owner = $1 AND asset = $2",
            &[&(owner as i64), &(asset as i64)],
            |x| { Ok(Self::get_reaction_from_row(x)) }
        );

        if res.is_err() {
            return Err(Error::GeneralNotFound("reaction".to_string()));
        }

        Ok(res.unwrap())
    }

    /// Create a new journal membership in the database.
    ///
    /// # Arguments
    /// * `data` - a mock [`Reaction`] object to insert
    pub async fn create_reaction(&self, data: Reaction) -> Result<()> {
        let conn = match self.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        let res = execute!(
            &conn,
            "INSERT INTO reactions VALUES ($1, $2, $3, $4, $5, $6)",
            &[
                &data.id.to_string().as_str(),
                &data.created.to_string().as_str(),
                &data.owner.to_string().as_str(),
                &data.asset.to_string().as_str(),
                &serde_json::to_string(&data.asset_type).unwrap().as_str(),
                &(if data.is_like { 1 } else { 0 }).to_string().as_str()
            ]
        );

        if let Err(e) = res {
            return Err(Error::DatabaseError(e.to_string()));
        }

        // incr corresponding
        match data.asset_type {
            AssetType::Journal => {
                if let Err(e) = self.incr_community_likes(data.id).await {
                    return Err(e);
                }
            }
            AssetType::JournalEntry => {
                if let Err(e) = self.incr_post_likes(data.id).await {
                    return Err(e);
                }
            }
        };

        // return
        Ok(())
    }

    pub async fn delete_reaction(&self, id: usize, user: User) -> Result<()> {
        let reaction = self.get_reaction_by_id(id).await?;

        if user.id != reaction.owner {
            if !user.permissions.check(FinePermission::MANAGE_REACTIONS) {
                return Err(Error::NotAllowed);
            }
        }

        let conn = match self.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        let res = execute!(
            &conn,
            "DELETE FROM reactions WHERE id = $1",
            &[&id.to_string()]
        );

        if let Err(e) = res {
            return Err(Error::DatabaseError(e.to_string()));
        }

        self.2.remove(format!("atto.reaction:{}", id)).await;

        // decr corresponding
        match reaction.asset_type {
            AssetType::Journal => {
                if let Err(e) = self.decr_community_likes(reaction.asset).await {
                    return Err(e);
                }
            }
            AssetType::JournalEntry => {
                if let Err(e) = self.decr_post_likes(reaction.asset).await {
                    return Err(e);
                }
            }
        };

        // return
        Ok(())
    }
}