use serenity::all::{ChannelId, Context, Guild, GuildId, UserId};

/// Get a guild by id
pub fn get_guild(ctx: &Context, guild_id: &GuildId) -> Option<Guild> {
    let guild = match ctx.cache.guild(guild_id) {
        Some(guild) => guild,
        None => {
            println!("Cannot get guild!");
            return None
        }
    }; // TODO This is always None for some reason
    
    println!("Got guild: {:?}", guild.name);

    Some(guild.clone())
}

/// Get the current channel id of the bot
pub fn get_vc_id(ctx: &Context, guild_id: &GuildId, user_id: &UserId) -> Option<ChannelId> {
    let guild = match get_guild(&ctx, guild_id){
        Some(guild) => guild,
        None => {
            println!("Cannot get guild while getting channel id!");
            return None
        }
    };

    let channel_id = guild
        .voice_states
        .get(user_id)
        .and_then(|voice_state| voice_state.channel_id)?;

    println!("Got vc with id: {:?}", channel_id);

    Some(channel_id)
}

/// Check if the bot is connected to a voice channel
pub fn is_self_connected_to_vc(ctx: &Context, guild_id: &GuildId) -> bool {
    let channel_id = get_self_vc_id(ctx, guild_id);

    !channel_id.is_none()
}

/// Get the current channel id of the bot
pub fn get_self_vc_id(ctx: &Context, guild_id: &GuildId) -> Option<ChannelId> {
    let channel_id = get_vc_id(ctx, guild_id, &ctx.cache.current_user().id)?;

    Some(channel_id)
}