use std::vec;

use poise::ChoiceParameter;
use reqwest::Client;

use songbird::input::Input;
use songbird::input::HttpRequest;
use songbird::TrackEvent;

use super::super::connect;
use super::link_or_string;
use super::LinkString;
use super::parse_radio_autocomplete;
use super::radio_utils::paginate_search_stations;
use super::super::voice_utils::MAX_ENTRIES;

use crate::commands::voice_types::{NumberOfEntries, PlayingInfoType};
use crate::types::{Context, Error, ContextExt};
use crate::commands::voice::voice_utils::autocomplete_channel;

/// Plays online radio stream 
#[poise::command(
    slash_command,
    description_localized("en-US", "Plays music from URL source"),
    subcommands("search", "play"),
    guild_only
)]
pub async fn radio(_ctx: Context<'_>) -> Result<(), Error> {
    Ok(())
}

/// Play online radio stream directly from URL or autocompleted string
#[poise::command(
    slash_command,
    description_localized("en-US", "Plays music from URL source"),
    category = "Voice"
)]
pub async fn play(ctx: Context<'_>,
    #[autocomplete = "autocomplete_channel"]
    #[description = "Voice channel name: "]
    channel: Option<String>,
    #[autocomplete = "autocomplete_radio"]
    #[description = "Radio station: "]
    name: String,
) -> Result<(), Error> {
    let api = &ctx.data().radio_browser;
    
    let stations_result = match link_or_string(&name) {
        LinkString::Link => {            
            if name.ends_with(".m3u") {
                ctx.reply_ephemeral("Sorry, currently I don't support m3u files").await?;
                return Ok(());
            }

            api.get_stations().byurl(name).await
        },
        LinkString::String => {
            let (name, country, language) = match parse_radio_autocomplete(&name) {
                Some(tuple) => tuple,
                None => {
                    ctx.reply_ephemeral("Please use either direct URL or provided autocomplete").await?;
                    return Ok(())
                }
            };

            api.get_stations()
                .name_exact(true)
                .name(name)
                .country_exact(true)
                .country(country)
                .language_exact(true)
                .language(language)
                .send().await
        }
    };

    let Ok(stations) = stations_result else {
        ctx.reply_ephemeral("There was an error with radio API!").await?;
        return Ok(())
    };

    let Some(station) = stations.first() else {
        ctx.reply_ephemeral("Radio station not found!").await?;
        return Ok(())
    };

    let events = vec![TrackEvent::End, TrackEvent::Error];
    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 client = Client::new();
        let request = HttpRequest::new(client, station.url.clone());
        let input = Input::from(request);
        handler.play_only_input(input);
    }
    else {
        ctx.reply_ephemeral("Not in a voice channel").await?;
        return Ok(())
    }

    {
        let mut hash_map = ctx.data().playing_info.lock().await;
        hash_map.insert(guild_id, PlayingInfoType::RadioInfo(station.clone()));
    }

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

async fn autocomplete_radio(
    ctx: Context<'_>,
    partial: &str
) -> Vec<String> {
    
    let api = &ctx.data().radio_browser;

    let stations: Vec<String> = match api.get_stations()
        .limit(MAX_ENTRIES)
        .name(partial)
        .hidebroken(true)
        .send().await {
            Ok(stations) => {
                stations.iter().map(|station: &radiobrowser::ApiStation| 
                    format!("Name: {} Country: {} Language: {}", station.name, station.country, station.language)
                ).collect()
            },
            Err(_) => return vec!["".to_owned()]
    };

    return stations
}

/// Search online radios (you can use stream URL from output for /play) 
#[poise::command(
    slash_command,
    description_localized("en-US", "Search for a radio"),
    category = "Voice"
)]
pub async fn search(ctx: Context<'_>,
    #[description = "Radio station: "]
    name: String,
    #[description = "Country: "]
    country: Option<String>,
    #[description = "Tag: "]
    tag: Option<String>,
    #[description = "Number of entries on page: "]
    entries: Option<NumberOfEntries>
) -> Result<(), Error> {

    let api = &ctx.data().radio_browser;    

    let entries = entries.unwrap_or(NumberOfEntries::Ten);

    let search_builder = api.get_stations()
        .limit(entries.name())
        .name(name)
        .tag(tag.unwrap_or("".to_owned()))
        .country(country.unwrap_or("".to_owned()))
        .hidebroken(true);

    paginate_search_stations(&ctx, &search_builder, entries).await?;

    Ok(())
}