use super::DataManager;
use crate::model::{Chat, ChatStyle};
use oiseau::{PostgresRow, cache::Cache, execute, get, params};
use tetratto_core::{
    auto_method,
    model::{Error, Result},
};

impl DataManager {
    /// Get a [`Chat`] from an SQL row.
    pub(crate) fn get_chat_from_row(x: &PostgresRow) -> Chat {
        Chat {
            id: get!(x->0(i64)) as usize,
            created: get!(x->1(i64)) as usize,
            style: serde_json::from_str(&get!(x->2(String))).unwrap(),
            members: serde_json::from_str(&get!(x->3(String))).unwrap(),
            last_message_created: get!(x->4(i64)) as usize,
            last_message_read_by: serde_json::from_str(&get!(x->5(String))).unwrap(),
        }
    }

    auto_method!(get_chat_by_id(usize as i64)@get_chat_from_row -> "SELECT * FROM t_chats WHERE id = $1" --name="chat" --returns=Chat --cache-key-tmpl="twny.chat:{}");

    /// Create a new chat in the database.
    ///
    /// # Arguments
    /// * `data` - a mock [`Chat`] object to insert
    pub async fn create_chat(&self, data: Chat) -> Result<Chat> {
        // check values
        if let ChatStyle::Group(ref info) = data.style {
            if info.name.trim().len() < 2 {
                return Err(Error::DataTooShort("name".to_string()));
            } else if info.name.len() > 128 {
                return Err(Error::DataTooLong("name".to_string()));
            }
        }

        // ...
        let conn = match self.0.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        let res = execute!(
            &conn,
            "INSERT INTO t_chats VALUES ($1, $2, $3, $4, $5, $6)",
            params![
                &(data.id as i64),
                &(data.created as i64),
                &serde_json::to_string(&data.style).unwrap(),
                &serde_json::to_string(&data.members).unwrap(),
                &(data.last_message_created as i64),
                &serde_json::to_string(&data.last_message_read_by).unwrap()
            ]
        );

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

        Ok(data)
    }

    /// Delete an existing chat.
    pub async fn delete_chat(&self, id: usize) -> Result<()> {
        let conn = match self.0.connect().await {
            Ok(c) => c,
            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
        };

        // delete chat
        let res = execute!(
            &conn,
            "DELETE FROM t_chats WHERE id = $1",
            params![&(id as i64)]
        );

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

        // delete messages
        let res = execute!(
            &conn,
            "DELETE FROM t_messages WHERE chat = $1",
            params![&(id as i64)]
        );

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

        // ...
        Ok(())
    }

    auto_method!(update_chat_style(ChatStyle) -> "UPDATE t_chats SET style = $1 WHERE id = $2" --serde --cache-key-tmpl="twny.chat:{}");
    auto_method!(update_chat_members(Vec<usize>) -> "UPDATE t_chats SET members = $1 WHERE id = $2" --serde --cache-key-tmpl="twny.chat:{}");
    auto_method!(update_chat_last_message_read_by(Vec<usize>) -> "UPDATE t_chats SET last_message_read_by = $1 WHERE id = $2" --serde --cache-key-tmpl="twny.chat:{}");
    auto_method!(update_chat_last_message_created(i64) -> "UPDATE t_chats SET last_message_created = $1 WHERE id = $2" --cache-key-tmpl="twny.chat:{}");
}