use std::{fs, hash::{DefaultHasher, Hash, Hasher}, io, path::Path, sync::Arc, vec};

use serenity::{all::{ChannelId, ChannelType, CreateMessage, GuildId, GuildRef, Message}, http::Http};

use poise::CreateReply;
use serenity::async_trait;

use crate::types::Context;


pub async fn get_system_channel(guild_id: GuildId, http: &Http) -> anyhow::Result<ChannelId> {
    use anyhow::Context;
    return http.get_guild(guild_id).await?.system_channel_id
        .context(format!("System channel of guild: {} not found", guild_id.get()));
}

pub async fn replace_msg(http: Arc<Http>, msg: Message, content: String) -> Result<Message, serenity::Error> {
    msg.delete(http.clone()).await?;

    return ChannelId::new(msg.channel_id.get()).send_message(http.clone(), CreateMessage::new().content(content)).await;
}

pub fn get_vc_names(guild: GuildRef) -> Vec<String> {

    let mut result: Vec<String> = [].to_vec();
    for (_, channel) in &guild.channels {
        if channel.kind == ChannelType::Voice {
            result.push(channel.name.clone());
        }
    }

    result
}

pub fn get_channel_by_name(guild: GuildRef, name: String) -> Option<ChannelId> {
    let mut result = None;
    for (_, channel) in &guild.channels {
        if channel.name.contains(&name) {
            result = Some(channel.id);
            break;
        }
    }

    result
}

pub fn get_local_songs(partial: &str) -> io::Result<Vec<String>> {
    let mut result: Vec<String> = vec![];
    let path = Path::new("/home/emil/Music");
    for entry in fs::read_dir(path)? {
        let entry = entry?;
        let path = entry.path();
        if path.is_dir() {
            continue;
        }

        let name = entry.file_name();
        if name.to_str().is_some_and(|name| !name.to_lowercase().contains(&partial.to_lowercase())) {
            continue;
        }

        result.push(name.to_str().unwrap().into());
    }

    Ok(result)
}

pub fn hash_to_u32<T: Hash>(from: &T) -> u32 {
    let mut hasher = DefaultHasher::new();
    from.hash(&mut hasher);
    let hash_val = hasher.finish();
    (hash_val & 0xFFFFFF) as u32
}