use std::vec;

use poise::CreateReply;
use songbird::input::{File, Input};
use songbird::TrackEvent;

use crate::utils::debug::send_error;
use crate::types::{Context, ContextExt, Error};
use crate::utils::utilities::get_local_songs;

use super::voice_utils::{connect, autocomplete_channel};


/************************************************************
 * Common commands that are the same for every implementation
 ************************************************************/

/// Disconnect bot from voice channel
#[poise::command(
    slash_command,
    description_localized("en-US", "Disconnect from voice channel"),
    category = "Voice",
    guild_only
)]
pub async fn disconnect(
    ctx: Context<'_>
) -> Result<(), Error> {

    let Some(guild_id) = ctx.guild_id() else {
        ctx.reply_ephemeral("Can't use this outside of guild").await?;
        return Ok(());
    };

    let manager = songbird::get(ctx.serenity_context())
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    let has_handler = manager.get(guild_id).is_some();

    if ! has_handler {
        ctx.reply_ephemeral("I am not connected to a channel!").await?;
        return Ok(())
    }

    match manager.remove(guild_id).await {
        Ok(()) => {
            ctx.reply_ephemeral("Disconnected").await?;
            return Ok(())
        }
        Err(e) => {
            let _ = send_error(ctx.serenity_context().http.clone(), e.to_string()).await;
            return Ok(())
        }
    }
}

#[allow(dead_code)]
async fn autocomplete_song(
    _ctx: Context<'_>,
    partial: &str,
) -> Vec<String> {

    match get_local_songs(partial) {
        Ok(names) => names,
        Err(_) => vec![]
    }
}

#[poise::command(
    slash_command,
    description_localized("en-US", "Play song from server storage"),
    category = "Voice",
    guild_only
)]
pub async fn play_local(ctx: Context<'_>,
    #[autocomplete = "autocomplete_channel"]
    #[description = "Voice channel name: "]
    channel: Option<String>,
    #[autocomplete = "autocomplete_song"]
    #[description = "Filename of local song: "]
    file_name: String
) -> Result<(), Error> {
    let events = vec![TrackEvent::End];
    let (manager, guild_id) = match connect(&ctx, channel, events).await {
        Ok(result) => result,
        Err(e) => {
            ctx.reply_ephemeral(&e.to_string()).await?;
            println!("SONGBIRD MANAGER ERROR: {}", e.to_string());
            return Ok(())
        }
    };

    if let Some(handler_lock) = manager.get(guild_id) {
        let mut handler = handler_lock.lock().await;

        let input_file = File::new(format!("/home/emil/Music/{file_name}"));
        let input = Input::Lazy(Box::new(input_file));
        let _ = handler.play_only_input(input);
    }
    else {
        ctx.reply_ephemeral("Not in a voice channel").await?;
        return Ok(())
    }

    ctx.reply_ephemeral("Done!").await?;
    Ok(())
}

/// Sends embed with some info about currently playing source
#[poise::command(
    slash_command,
    description_localized("en-US", "Display currently playing info"),
    category = "Voice",
    guild_only
)]
pub async fn playing(ctx: Context<'_>) -> Result<(), Error> {

    let Some(guild_id) = ctx.guild_id() else {
        ctx.reply_ephemeral("Guild id not found").await?;
        return Ok(())
    };

    let manager = songbird::get(ctx.serenity_context())
        .await
        .expect("Songbird Voice client placed in at initialisation.")
        .clone();

    let Some(_) = manager.get(guild_id) else {
        ctx.reply_ephemeral("I am not connected to any voice channel right now").await?;
        return Ok(())
    };

    let embed = {
        let mutex_hashmap = ctx.data().playing_info.lock().await;
        let Some(playing_info) = mutex_hashmap.get(&guild_id) else {
            ctx.reply_ephemeral("Entry not found, try to reconnect me").await?;
            return Ok(());
        };

        playing_info.generate_embed().await    
    };

    ctx.send(
        CreateReply::default()
            .embed(embed)
    ).await?;

    Ok(())
}