use actix_web::web::{self, Data};
use actix_web::{HttpRequest, HttpResponse};
use deserr::actix_web::AwebJson;
use deserr::Deserr;
use index_scheduler::IndexScheduler;
use log::debug;
use meilisearch_types::deserr::DeserrJsonError;
use meilisearch_types::error::ResponseError;
use meilisearch_types::keys::actions;
use serde_json::json;

use crate::analytics::Analytics;
use crate::extractors::authentication::policies::ActionPolicy;
use crate::extractors::authentication::GuardedData;
use crate::extractors::sequential_extractor::SeqHandler;

pub fn configure(cfg: &mut web::ServiceConfig) {
    cfg.service(
        web::resource("")
            .route(web::get().to(SeqHandler(get_features)))
            .route(web::patch().to(SeqHandler(patch_features)))
            .route(web::delete().to(SeqHandler(delete_features)))
            .route(web::post().to(SeqHandler(post_features))),
    );
}

async fn get_features(
    index_scheduler: GuardedData<
        ActionPolicy<{ actions::EXPERIMENTAL_FEATURES_GET }>,
        Data<IndexScheduler>,
    >,
    req: HttpRequest,
    analytics: Data<dyn Analytics>,
) -> Result<HttpResponse, ResponseError> {
    let features = index_scheduler.features()?;

    analytics.publish("Experimental features Seen".to_string(), json!(null), Some(&req));
    debug!("returns: {:?}", features.runtime_features());
    Ok(HttpResponse::Ok().json(features.runtime_features()))
}

#[derive(Debug, Deserr)]
#[deserr(error = DeserrJsonError, rename_all = camelCase, deny_unknown_fields)]
pub struct RuntimeTogglableFeatures {
    #[deserr(default)]
    pub score_details: Option<bool>,
    #[deserr(default)]
    pub vector_store: Option<bool>,
}

async fn patch_features(
    index_scheduler: GuardedData<
        ActionPolicy<{ actions::EXPERIMENTAL_FEATURES_UPDATE }>,
        Data<IndexScheduler>,
    >,
    new_features: AwebJson<RuntimeTogglableFeatures, DeserrJsonError>,
    req: HttpRequest,
    analytics: Data<dyn Analytics>,
) -> Result<HttpResponse, ResponseError> {
    let features = index_scheduler.features()?;

    let old_features = features.runtime_features();

    let new_features = meilisearch_types::features::RuntimeTogglableFeatures {
        score_details: new_features.0.score_details.unwrap_or(old_features.score_details),
        vector_store: new_features.0.vector_store.unwrap_or(old_features.vector_store),
    };

    analytics.publish("Experimental features Updated".to_string(), json!(new_features), Some(&req));
    index_scheduler.put_runtime_features(new_features)?;
    Ok(HttpResponse::Ok().json(new_features))
}

async fn post_features(
    index_scheduler: GuardedData<
        ActionPolicy<{ actions::EXPERIMENTAL_FEATURES_UPDATE }>,
        Data<IndexScheduler>,
    >,
    new_features: AwebJson<RuntimeTogglableFeatures, DeserrJsonError>,
    analytics: Data<dyn Analytics>,
    req: HttpRequest,
) -> Result<HttpResponse, ResponseError> {
    let new_features = meilisearch_types::features::RuntimeTogglableFeatures {
        score_details: new_features.0.score_details.unwrap_or(false),
        vector_store: new_features.0.vector_store.unwrap_or(false),
    };

    analytics.publish("Experimental features Updated".to_string(), json!(new_features), Some(&req));
    index_scheduler.put_runtime_features(new_features)?;
    Ok(HttpResponse::Ok().json(new_features))
}

async fn delete_features(
    index_scheduler: GuardedData<
        ActionPolicy<{ actions::EXPERIMENTAL_FEATURES_UPDATE }>,
        Data<IndexScheduler>,
    >,
    analytics: Data<dyn Analytics>,
    req: HttpRequest,
) -> Result<HttpResponse, ResponseError> {
    let deleted_features = Default::default();
    analytics.publish(
        "Experimental features Updated".to_string(),
        json!(deleted_features),
        Some(&req),
    );
    index_scheduler.put_runtime_features(deleted_features)?;
    Ok(HttpResponse::Ok().json(deleted_features))
}