use std::sync::Arc;

use actix_web::web;
use database::redis::RedisPool;
use log::{info, warn};
use queue::{
    analytics::AnalyticsQueue, payouts::PayoutsQueue, session::AuthQueue, socket::ActiveSockets,
};
use scheduler::Scheduler;
use sqlx::Postgres;
use tokio::sync::RwLock;

extern crate clickhouse as clickhouse_crate;
use clickhouse_crate::Client;
use util::cors::default_cors;

use crate::{
    queue::payouts::process_payout,
    search::indexing::index_projects,
    util::env::{parse_strings_from_var, parse_var},
};

pub mod auth;
pub mod clickhouse;
pub mod database;
pub mod file_hosting;
pub mod models;
pub mod queue;
pub mod ratelimit;
pub mod routes;
pub mod scheduler;
pub mod search;
pub mod util;
pub mod validate;

#[derive(Clone)]
pub struct Pepper {
    pub pepper: String,
}

#[derive(Clone)]
pub struct LabrinthConfig {
    pub pool: sqlx::Pool<Postgres>,
    pub redis_pool: RedisPool,
    pub clickhouse: Client,
    pub file_host: Arc<dyn file_hosting::FileHost + Send + Sync>,
    pub maxmind: Arc<queue::maxmind::MaxMindIndexer>,
    pub scheduler: Arc<Scheduler>,
    pub ip_salt: Pepper,
    pub search_config: search::SearchConfig,
    pub session_queue: web::Data<AuthQueue>,
    pub payouts_queue: web::Data<PayoutsQueue>,
    pub analytics_queue: Arc<AnalyticsQueue>,
    pub active_sockets: web::Data<RwLock<ActiveSockets>>,
}

pub fn app_setup(
    pool: sqlx::Pool<Postgres>,
    redis_pool: RedisPool,
    clickhouse: &mut Client,
    file_host: Arc<dyn file_hosting::FileHost + Send + Sync>,
    maxmind: Arc<queue::maxmind::MaxMindIndexer>,
) -> LabrinthConfig {
    info!(
        "Starting Labrinth on {}",
        dotenvy::var("BIND_ADDR").unwrap()
    );

    let search_config = search::SearchConfig {
        address: dotenvy::var("MEILISEARCH_ADDR").unwrap(),
        key: dotenvy::var("MEILISEARCH_KEY").unwrap(),
    };

    let mut scheduler = scheduler::Scheduler::new();

    // The interval in seconds at which the local database is indexed
    // for searching.  Defaults to 1 hour if unset.
    let local_index_interval =
        std::time::Duration::from_secs(parse_var("LOCAL_INDEX_INTERVAL").unwrap_or(3600));

    let pool_ref = pool.clone();
    let search_config_ref = search_config.clone();
    let redis_pool_ref = redis_pool.clone();
    scheduler.run(local_index_interval, move || {
        let pool_ref = pool_ref.clone();
        let redis_pool_ref = redis_pool_ref.clone();
        let search_config_ref = search_config_ref.clone();
        async move {
            info!("Indexing local database");
            let result = index_projects(pool_ref, redis_pool_ref.clone(), &search_config_ref).await;
            if let Err(e) = result {
                warn!("Local project indexing failed: {:?}", e);
            }
            info!("Done indexing local database");
        }
    });

    // Changes statuses of scheduled projects/versions
    let pool_ref = pool.clone();
    // TODO: Clear cache when these are run
    scheduler.run(std::time::Duration::from_secs(60 * 5), move || {
        let pool_ref = pool_ref.clone();
        info!("Releasing scheduled versions/projects!");

        async move {
            let projects_results = sqlx::query!(
                "
                UPDATE mods
                SET status = requested_status
                WHERE status = $1 AND approved < CURRENT_DATE AND requested_status IS NOT NULL
                ",
                crate::models::projects::ProjectStatus::Scheduled.as_str(),
            )
            .execute(&pool_ref)
            .await;

            if let Err(e) = projects_results {
                warn!("Syncing scheduled releases for projects failed: {:?}", e);
            }

            let versions_results = sqlx::query!(
                "
                UPDATE versions
                SET status = requested_status
                WHERE status = $1 AND date_published < CURRENT_DATE AND requested_status IS NOT NULL
                ",
                crate::models::projects::VersionStatus::Scheduled.as_str(),
            )
            .execute(&pool_ref)
            .await;

            if let Err(e) = versions_results {
                warn!("Syncing scheduled releases for versions failed: {:?}", e);
            }

            info!("Finished releasing scheduled versions/projects");
        }
    });

    scheduler::schedule_versions(&mut scheduler, pool.clone(), redis_pool.clone());

    let session_queue = web::Data::new(AuthQueue::new());

    let pool_ref = pool.clone();
    let redis_ref = redis_pool.clone();
    let session_queue_ref = session_queue.clone();
    scheduler.run(std::time::Duration::from_secs(60 * 30), move || {
        let pool_ref = pool_ref.clone();
        let redis_ref = redis_ref.clone();
        let session_queue_ref = session_queue_ref.clone();

        async move {
            info!("Indexing sessions queue");
            let result = session_queue_ref.index(&pool_ref, &redis_ref).await;
            if let Err(e) = result {
                warn!("Indexing sessions queue failed: {:?}", e);
            }
            info!("Done indexing sessions queue");
        }
    });

    let reader = maxmind.clone();
    {
        let reader_ref = reader;
        scheduler.run(std::time::Duration::from_secs(60 * 60 * 24), move || {
            let reader_ref = reader_ref.clone();

            async move {
                info!("Downloading MaxMind GeoLite2 country database");
                let result = reader_ref.index().await;
                if let Err(e) = result {
                    warn!(
                        "Downloading MaxMind GeoLite2 country database failed: {:?}",
                        e
                    );
                }
                info!("Done downloading MaxMind GeoLite2 country database");
            }
        });
    }
    info!("Downloading MaxMind GeoLite2 country database");

    let analytics_queue = Arc::new(AnalyticsQueue::new());
    {
        let client_ref = clickhouse.clone();
        let analytics_queue_ref = analytics_queue.clone();
        let pool_ref = pool.clone();
        let redis_ref = redis_pool.clone();
        scheduler.run(std::time::Duration::from_secs(15), move || {
            let client_ref = client_ref.clone();
            let analytics_queue_ref = analytics_queue_ref.clone();
            let pool_ref = pool_ref.clone();
            let redis_ref = redis_ref.clone();

            async move {
                info!("Indexing analytics queue");
                let result = analytics_queue_ref
                    .index(client_ref, &redis_ref, &pool_ref)
                    .await;
                if let Err(e) = result {
                    warn!("Indexing analytics queue failed: {:?}", e);
                }
                info!("Done indexing analytics queue");
            }
        });
    }

    {
        let pool_ref = pool.clone();
        let redis_ref = redis_pool.clone();
        let client_ref = clickhouse.clone();
        scheduler.run(std::time::Duration::from_secs(60 * 60 * 6), move || {
            let pool_ref = pool_ref.clone();
            let redis_ref = redis_ref.clone();
            let client_ref = client_ref.clone();

            async move {
                info!("Started running payouts");
                let result = process_payout(&pool_ref, &redis_ref, &client_ref).await;
                if let Err(e) = result {
                    warn!("Payouts run failed: {:?}", e);
                }
                info!("Done running payouts");
            }
        });
    }

    let ip_salt = Pepper {
        pepper: models::ids::Base62Id(models::ids::random_base62(11)).to_string(),
    };

    let payouts_queue = web::Data::new(PayoutsQueue::new());
    let active_sockets = web::Data::new(RwLock::new(ActiveSockets::default()));

    LabrinthConfig {
        pool,
        redis_pool,
        clickhouse: clickhouse.clone(),
        file_host,
        maxmind,
        scheduler: Arc::new(scheduler),
        ip_salt,
        search_config,
        session_queue,
        payouts_queue,
        analytics_queue,
        active_sockets,
    }
}

pub fn app_config(cfg: &mut web::ServiceConfig, labrinth_config: LabrinthConfig) {
    cfg.app_data(
        web::FormConfig::default()
            .error_handler(|err, _req| routes::ApiError::Validation(err.to_string()).into()),
    )
    .app_data(
        web::PathConfig::default()
            .error_handler(|err, _req| routes::ApiError::Validation(err.to_string()).into()),
    )
    .app_data(
        web::QueryConfig::default()
            .error_handler(|err, _req| routes::ApiError::Validation(err.to_string()).into()),
    )
    .app_data(
        web::JsonConfig::default()
            .error_handler(|err, _req| routes::ApiError::Validation(err.to_string()).into()),
    )
    .app_data(web::Data::new(labrinth_config.redis_pool.clone()))
    .app_data(web::Data::new(labrinth_config.pool.clone()))
    .app_data(web::Data::new(labrinth_config.file_host.clone()))
    .app_data(web::Data::new(labrinth_config.search_config.clone()))
    .app_data(labrinth_config.session_queue.clone())
    .app_data(labrinth_config.payouts_queue.clone())
    .app_data(web::Data::new(labrinth_config.ip_salt.clone()))
    .app_data(web::Data::new(labrinth_config.analytics_queue.clone()))
    .app_data(web::Data::new(labrinth_config.clickhouse.clone()))
    .app_data(web::Data::new(labrinth_config.maxmind.clone()))
    .app_data(labrinth_config.active_sockets.clone())
    .configure(routes::v2::config)
    .configure(routes::v3::config)
    .configure(routes::internal::config)
    .configure(routes::root_config)
    .default_service(web::get().wrap(default_cors()).to(routes::not_found));
}

// This is so that env vars not used immediately don't panic at runtime
pub fn check_env_vars() -> bool {
    let mut failed = false;

    fn check_var<T: std::str::FromStr>(var: &'static str) -> bool {
        let check = parse_var::<T>(var).is_none();
        if check {
            warn!(
                "Variable `{}` missing in dotenv or not of type `{}`",
                var,
                std::any::type_name::<T>()
            );
        }
        check
    }

    failed |= check_var::<String>("SITE_URL");
    failed |= check_var::<String>("CDN_URL");
    failed |= check_var::<String>("LABRINTH_ADMIN_KEY");
    failed |= check_var::<String>("RATE_LIMIT_IGNORE_KEY");
    failed |= check_var::<String>("DATABASE_URL");
    failed |= check_var::<String>("MEILISEARCH_ADDR");
    failed |= check_var::<String>("MEILISEARCH_KEY");
    failed |= check_var::<String>("REDIS_URL");
    failed |= check_var::<String>("BIND_ADDR");
    failed |= check_var::<String>("SELF_ADDR");

    failed |= check_var::<String>("STORAGE_BACKEND");

    let storage_backend = dotenvy::var("STORAGE_BACKEND").ok();
    match storage_backend.as_deref() {
        Some("backblaze") => {
            failed |= check_var::<String>("BACKBLAZE_KEY_ID");
            failed |= check_var::<String>("BACKBLAZE_KEY");
            failed |= check_var::<String>("BACKBLAZE_BUCKET_ID");
        }
        Some("s3") => {
            failed |= check_var::<String>("S3_ACCESS_TOKEN");
            failed |= check_var::<String>("S3_SECRET");
            failed |= check_var::<String>("S3_URL");
            failed |= check_var::<String>("S3_REGION");
            failed |= check_var::<String>("S3_BUCKET_NAME");
        }
        Some("local") => {
            failed |= check_var::<String>("MOCK_FILE_PATH");
        }
        Some(backend) => {
            warn!("Variable `STORAGE_BACKEND` contains an invalid value: {}. Expected \"backblaze\", \"s3\", or \"local\".", backend);
            failed |= true;
        }
        _ => {
            warn!("Variable `STORAGE_BACKEND` is not set!");
            failed |= true;
        }
    }

    failed |= check_var::<usize>("LOCAL_INDEX_INTERVAL");
    failed |= check_var::<usize>("VERSION_INDEX_INTERVAL");

    if parse_strings_from_var("WHITELISTED_MODPACK_DOMAINS").is_none() {
        warn!("Variable `WHITELISTED_MODPACK_DOMAINS` missing in dotenv or not a json array of strings");
        failed |= true;
    }

    if parse_strings_from_var("ALLOWED_CALLBACK_URLS").is_none() {
        warn!("Variable `ALLOWED_CALLBACK_URLS` missing in dotenv or not a json array of strings");
        failed |= true;
    }

    failed |= check_var::<String>("GITHUB_CLIENT_ID");
    failed |= check_var::<String>("GITHUB_CLIENT_SECRET");
    failed |= check_var::<String>("GITLAB_CLIENT_ID");
    failed |= check_var::<String>("GITLAB_CLIENT_SECRET");
    failed |= check_var::<String>("DISCORD_CLIENT_ID");
    failed |= check_var::<String>("DISCORD_CLIENT_SECRET");
    failed |= check_var::<String>("MICROSOFT_CLIENT_ID");
    failed |= check_var::<String>("MICROSOFT_CLIENT_SECRET");
    failed |= check_var::<String>("GOOGLE_CLIENT_ID");
    failed |= check_var::<String>("GOOGLE_CLIENT_SECRET");
    failed |= check_var::<String>("STEAM_API_KEY");

    failed |= check_var::<String>("TREMENDOUS_API_URL");
    failed |= check_var::<String>("TREMENDOUS_API_KEY");
    failed |= check_var::<String>("TREMENDOUS_PRIVATE_KEY");

    failed |= check_var::<String>("PAYPAL_API_URL");
    failed |= check_var::<String>("PAYPAL_WEBHOOK_ID");
    failed |= check_var::<String>("PAYPAL_CLIENT_ID");
    failed |= check_var::<String>("PAYPAL_CLIENT_SECRET");

    failed |= check_var::<String>("TURNSTILE_SECRET");

    failed |= check_var::<String>("SMTP_USERNAME");
    failed |= check_var::<String>("SMTP_PASSWORD");
    failed |= check_var::<String>("SMTP_HOST");

    failed |= check_var::<String>("SITE_VERIFY_EMAIL_PATH");
    failed |= check_var::<String>("SITE_RESET_PASSWORD_PATH");

    failed |= check_var::<String>("BEEHIIV_PUBLICATION_ID");
    failed |= check_var::<String>("BEEHIIV_API_KEY");

    if parse_strings_from_var("ANALYTICS_ALLOWED_ORIGINS").is_none() {
        warn!(
            "Variable `ANALYTICS_ALLOWED_ORIGINS` missing in dotenv or not a json array of strings"
        );
        failed |= true;
    }

    failed |= check_var::<String>("CLICKHOUSE_URL");
    failed |= check_var::<String>("CLICKHOUSE_USER");
    failed |= check_var::<String>("CLICKHOUSE_PASSWORD");
    failed |= check_var::<String>("CLICKHOUSE_DATABASE");

    failed |= check_var::<String>("MAXMIND_LICENSE_KEY");

    failed |= check_var::<u64>("PAYOUTS_BUDGET");

    failed
}