use rusqlite::OptionalExtension;
use tracing::instrument;

use crate::types::session::Session;

use super::Database;

impl Database {
    pub fn init_sessions(&self) -> Result<(), rusqlite::Error> {
        let sql = "
            CREATE TABLE IF NOT EXISTS sessions (
                user_id        INTEGER PRIMARY KEY NOT NULL,
                token       TEXT NOT NULL,  
                FOREIGN KEY(user_id) REFERENCES users(user_id)
            );
        ";
        self.0.execute(sql, ())?;
        Ok(())
    }

    #[instrument(skip(self))]
    pub fn get_session(&self, token: &str) -> Result<Option<Session>, rusqlite::Error> {
        tracing::trace!("Retrieving session");
        let mut stmt = self.0.prepare("SELECT * FROM sessions WHERE token = ?")?;
        let row = stmt
            .query_row([token], |row| {
                Ok(Session {
                    user_id: row.get(0)?,
                    token: row.get(1)?,
                })
            })
            .optional()?;
        Ok(row)
    }

    #[instrument(skip(self))]
    pub fn get_all_sessions(&self) -> Result<Vec<Session>, rusqlite::Error> {
        tracing::trace!("Retrieving session");
        let mut stmt = self.0.prepare("SELECT * FROM sessions")?;
        let row = stmt.query_map([], |row| {
            Ok(Session {
                user_id: row.get(0)?,
                token: row.get(1)?,
            })
        })?;
        Ok(row.into_iter().flatten().collect())
    }

    #[instrument(skip(self))]
    pub fn set_session(&self, user_id: u64, token: &str) -> Result<(), Box<dyn std::error::Error>> {
        tracing::trace!("Setting new session");
        let sql = "INSERT OR REPLACE INTO sessions (user_id, token) VALUES (?, ?);";
        self.0.execute(sql, (user_id, token))?;
        Ok(())
    }

    #[instrument(skip(self))]
    pub fn delete_session(&self, user_id: u64) -> Result<(), Box<dyn std::error::Error>> {
        tracing::trace!("Deleting session");
        let sql = "DELETE FROM sessions WHERE user_id = ?;";
        self.0.execute(sql, [user_id])?;
        Ok(())
    }
}