use twitch_api2::{
    helix::points::{CreateCustomRewardRequest, CreateCustomRewardBody, GetCustomRewardRequest, CustomReward},
    types::RewardId,
};
use warp::{
    Filter, Reply,
    filters::BoxedFilter,
    http::Uri,
};
use uuid::Uuid;
use crate::app::{
    State,
    config::Redemption,
    web::{
        CustomRejection,
        template::redemptions::{RedemptionsTemplate, AddRedemptionTemplate, CreateRedemptionTemplate, ListRedemptionsTemplate},
    },
};
use std::{
    collections::HashMap,
    convert::Infallible,
    sync::Arc,
};

pub fn redemptions_routes(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::get()
        .and(
            redemptions_get(Arc::clone(&state))
                .or(redemptions_add_get())
                .or(redemptions_list_get(Arc::clone(&state)))
                .or(redemptions_create_get())
        )
        .or(warp::post().and(
            redemptions_add_post(Arc::clone(&state))
                .or(redemptions_delete_post(Arc::clone(&state)))
                .or(redemptions_create_post(Arc::clone(&state)))
        ))
        .boxed()
}

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

fn redemptions_add_get() -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .and(warp::path("add"))
        .and(warp::path::end())
        .map(|| AddRedemptionTemplate)
        .boxed()
}

fn redemptions_add_post(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .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 twitch_id = form.remove("twitch_id")?;
                    let rhai = form.remove("rhai")?;
                    (name, twitch_id, rhai)
                };

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

                let redemption = Redemption {
                    id: Uuid::new_v4(),
                    name,
                    twitch_id: RewardId::new(twitch_id),
                    rhai,
                };

                state.config.write().await.redemptions.push(redemption);

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

fn redemptions_create_get() -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .and(warp::path("create"))
        .and(warp::path::end())
        .map(|| CreateRedemptionTemplate)
        .boxed()
}

fn redemptions_create_post(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .and(warp::path("create"))
        .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")?;
                    name
                };

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

                let request = CreateCustomRewardRequest::builder()
                    .broadcaster_id(state.user_config.twitch.channel_id.to_string())
                    .build();

                let body = CreateCustomRewardBody::builder()
                    .title(name)
                    .cost(100)
                    .build();

                let token = match state.twitch.user_token().await {
                    Ok(token) => token,
                    Err(_) => return Err(warp::reject::custom(CustomRejection::TwitchError)),
                };
                let _reward: CustomReward = match state.twitch.client.helix.req_post(request, body, &token).await {
                    Ok(resp) => resp.data,
                    Err(_) => return Err(warp::reject::custom(CustomRejection::TwitchError)),
                };

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

fn redemptions_delete_post(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .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 id = match super::uuid_from_form(&mut form) {
                    Some(n) => n,
                    None => return Err(warp::reject::custom(CustomRejection::InvalidForm)),
                };

                state.config.write().await.redemptions.drain_filter(|redemption| redemption.id == id);

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

fn redemptions_list_get(state: Arc<State>) -> BoxedFilter<(impl Reply, )> {
    warp::path("redemptions")
        .and(warp::path("list"))
        .and(warp::path::end())
        .and_then( move || {
            let state = Arc::clone(&state);
            async move {
                let req = GetCustomRewardRequest::builder()
                    .broadcaster_id(state.user_config.twitch.channel_id.to_string())
                    .build();
                let token = match state.twitch.user_token().await {
                    Ok(token) => token,
                    Err(_) => return Err(warp::reject::custom(CustomRejection::TwitchError)),
                };
                let rewards: Vec<CustomReward> = match state.twitch.client.helix.req_get(req, &token).await {
                    Ok(resp) => resp.data,
                    Err(_) => return Err(warp::reject::custom(CustomRejection::TwitchError)),
                };
                Ok(rewards)
            }
        })
        .map(|rewards: Vec<CustomReward>| ListRedemptionsTemplate {
            rewards,
        })
        .boxed()
}