use warp::{
    Filter, Reply,
    filters::BoxedFilter,
    http::Uri,
};
use crate::app::{
    State,
    config::{CommandExecutor, Command, Cooldowns},
    web::{
        CustomRejection,
        template::commands::{CommandsTemplate, AddCommandTemplate},
    },
};
use std::{
    collections::HashMap,
    convert::Infallible,
    sync::Arc,
};

pub fn commands_routes(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::get()
        .and(
            commands_get(Arc::clone(&state))
                .or(commands_add_get())
        )
        .or(warp::post().and(
            commands_add_post(Arc::clone(&state))
                .or(commands_delete_post(Arc::clone(&state)))
        ))
        .boxed()
}

fn commands_get(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("commands")
        .and(warp::path::end())
        .and_then(move || {
            let state = Arc::clone(&state);
            async move {
                Result::<CommandsTemplate, Infallible>::Ok(CommandsTemplate {
                    commands: state.config.read().await.commands.clone(),
                })
            }
        })
        .boxed()
}

fn commands_add_get() -> BoxedFilter<(impl Reply, )> {
    warp::path("commands")
        .and(warp::path("add"))
        .and(warp::path::end())
        .map(|| AddCommandTemplate)
        .boxed()
}

fn commands_add_post(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("commands")
        .and(warp::path("add"))
        .and(warp::path::end())
        .and(warp::body::content_length_limit(1024 * 5))
        .and(warp::body::form())
        .and_then(move |mut form: HashMap<String, String>| {
            let state = Arc::clone(&state);
            async move {
                let form_get = try {
                    let name = form.remove("name")?;
                    let aliases = form.remove("aliases")?;
                    let kind = form.remove("type")?;
                    let script = form.remove("executor_data")?;
                    (name, aliases, kind, script)
                };

                let (name, aliases, kind, script) = match form_get {
                    Some(x) => x,
                    None => return Err(warp::reject::custom(CustomRejection::InvalidForm)),
                };

                let executor = match &*kind {
                    "Text" => CommandExecutor::Text(script),
                    "Rhai" => CommandExecutor::Rhai(script),
                    _ => return Err(warp::reject::custom(CustomRejection::InvalidForm)),
                };

                let command = Command {
                    name,
                    executor,
                    aliases: aliases.split("\n").map(|x| x.trim().to_string()).filter(|x| !x.is_empty()).collect(),
                    cooldowns: Cooldowns::default(),
                };

                state.config.write().await.commands.push(command);

                Ok(warp::redirect(Uri::from_static("/commands")))
            }
        })
        .boxed()
}

fn commands_delete_post(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("commands")
        .and(warp::path("delete"))
        .and(warp::path::end())
        .and(warp::body::content_length_limit(1024 * 5))
        .and(warp::body::form())
        .and_then(move |mut form: HashMap<String, String>| {
            let state = Arc::clone(&state);
            async move {
                let name = match form.remove("name") {
                    Some(n) => n,
                    None => return Err(warp::reject::custom(CustomRejection::InvalidForm)),
                };

                state.config.write().await.commands.drain_filter(|command| command.name == name);

                Ok(warp::redirect(Uri::from_static("/commands")))
            }
        })
        .boxed()
}