use super::*;
use crate::cache::Cache;
use crate::model::{
    Error, Result, auth::User, permissions::FinePermission,
    communities_permissions::CommunityPermission, channels::Channel,
};
use crate::{auto_method, execute, get, query_row, query_rows, params};

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

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

impl DataManager {
    /// Get a [`Channel`] from an SQL row.
    pub(crate) fn get_channel_from_row(
        #[cfg(feature = "sqlite")] x: &Row<'_>,
        #[cfg(feature = "postgres")] x: &Row,
    ) -> Channel {
        Channel {
            id: get!(x->0(i64)) as usize,
            community: get!(x->1(i64)) as usize,
            owner: get!(x->2(i64)) as usize,
            created: get!(x->3(i64)) as usize,
            minimum_role_read: get!(x->4(i32)) as u32,
            minimum_role_write: get!(x->5(i32)) as u32,
            position: get!(x->6(i32)) as usize,
        }
    }

    auto_method!(get_channel_by_id(usize)@get_channel_from_row -> "SELECT * FROM channels WHERE id = $1" --name="channel" --returns=Channel --cache-key-tmpl="atto.channel:{}");

    /// Get all channels by user.
    ///
    /// # Arguments
    /// * `community` - the ID of the community to fetch channels for
    pub async fn get_channels_by_community(&self, community: usize) -> Result<Vec<Channel>> {
        let conn = match self.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        let res = query_rows!(
            &conn,
            "SELECT * FROM channels WHERE community = $1 ORDER BY position DESC",
            &[&(community as i64)],
            |x| { Self::get_channel_from_row(x) }
        );

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

        Ok(res.unwrap())
    }

    /// Create a new channel in the database.
    ///
    /// # Arguments
    /// * `data` - a mock [`Channel`] object to insert
    pub async fn create_channel(&self, data: Channel) -> Result<()> {
        let user = self.get_user_by_id(data.owner).await?;

        // check user permission in community
        let membership = self
            .get_membership_by_owner_community(user.id, data.community)
            .await?;

        if !membership.role.check(CommunityPermission::MANAGE_CHANNELS)
            && !user.permissions.check(FinePermission::MANAGE_CHANNELS)
        {
            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,
            "INSERT INTO channels VALUES ($1, $2, $3, $4, $5, $6, $7)",
            params![
                &(data.id as i64),
                &(data.community as i64),
                &(data.owner as i64),
                &(data.created as i64),
                &(data.minimum_role_read as i32),
                &(data.minimum_role_write as i32),
                &(data.position as i32)
            ]
        );

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

        Ok(())
    }

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

        // check user permission in community
        let membership = self
            .get_membership_by_owner_community(user.id, channel.community)
            .await?;

        if !membership.role.check(CommunityPermission::MANAGE_CHANNELS) {
            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 channels WHERE id = $1", &[&(id as i64)]);

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

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

    auto_method!(update_channel_position(i32)@get_channel_by_id:MANAGE_COMMUNITIES -> "UPDATE channels SET position = $1 WHERE id = $2" --cache-key-tmpl="atto.channel:{}");
    auto_method!(update_channel_minimum_role_read(i32)@get_channel_by_id:MANAGE_COMMUNITIES -> "UPDATE channels SET minimum_role_read = $1 WHERE id = $2" --cache-key-tmpl="atto.channel:{}");
    auto_method!(update_channel_minimum_role_write(i32)@get_channel_by_id:MANAGE_COMMUNITIES -> "UPDATE channels SET minimum_role_write = $1 WHERE id = $2" --cache-key-tmpl="atto.channel:{}");
}