from database.database import Database
from typing import Optional
import sqlite3


def streamer_live_status(user_id: int) -> bool:
    """
    Returns boolean on whether the given streamer is live
    """
    db = Database()
    is_live = db.fetchone("""
            SELECT isLive 
            FROM streams 
            WHERE user_id = ?
        """, (user_id,))
    return is_live

def followed_live_streams(user_id: int) -> list[dict]:
    """
    Searches for streamers who the user followed which are currently live
    """
    db = Database()
    live_streams = db.fetchall("""
            SELECT user_id, stream_id, title, num_viewers
            FROM streams 
            WHERE user_id IN (SELECT followed_id FROM follows WHERE user_id = ?)
            AND stream_id = (SELECT MAX(stream_id) FROM streams WHERE user_id = streams.user_id)
            AND isLive = 1;
        """, (user_id,))
    return live_streams

def followed_streamers(user_id: int) -> list[dict]:
    """
    Returns a list of streamers who the user follows
    """
    db = Database()
    followed_streamers = db.fetchall("""
            SELECT user_id, username
            FROM users
            WHERE user_id IN (SELECT followed_id FROM follows WHERE user_id = ?);
        """, (user_id,))
    return followed_streamers

def streamer_most_recent_stream(user_id: int) -> dict:
    """
    Returns data of the most recent stream by a streamer
    """
    db = Database()
    most_recent_stream = db.fetchone("""
            SELECT * FROM streams 
            WHERE user_id = ? 
            AND stream_id = (SELECT MAX(stream_id) FROM streams WHERE user_id = ?)
        """, (user_id, user_id))
    return most_recent_stream

def user_stream(user_id: int, stream_id: int) -> dict:
    """
    Returns data of a streamers selected stream
    """
    db = Database()
    stream = db.fetchone("""
            SELECT * FROM streams 
            WHERE user_id = ? 
            AND stream_id = ?
        """, (user_id, stream_id))
    return stream