use crate::db::{ConnectionPool, DbError};
use crate::message_broker::MessageBroker;
use std::sync::atomic::Ordering;
use std::sync::Arc;
use std::time::{Duration, Instant};

use super::base::{BaseWorker, Worker, WorkerState};

pub struct HouseWorker {
    base: BaseWorker,
}

// SQL-Queries analog zu `houseworker.h`
const QUERY_GET_NEW_HOUSE_DATA: &str = r#"
    SELECT
        h.id AS house_id
    FROM
        falukant_type.house AS h
    WHERE
        random() < 0.0001
        AND label_tr <> 'under_bridge';
"#;

const QUERY_ADD_NEW_BUYABLE_HOUSE: &str = r#"
    INSERT INTO falukant_data.buyable_house (house_type_id)
    VALUES ($1);
"#;

const QUERY_UPDATE_BUYABLE_HOUSE_STATE: &str = r#"
    UPDATE falukant_data.buyable_house
       SET roof_condition   = ROUND(roof_condition   - random() * (3 + 0 * id)),
           floor_condition  = ROUND(floor_condition  - random() * (3 + 0 * id)),
           wall_condition   = ROUND(wall_condition   - random() * (3 + 0 * id)),
           window_condition = ROUND(window_condition - random() * (3 + 0 * id));
"#;

const QUERY_UPDATE_USER_HOUSE_STATE: &str = r#"
    UPDATE falukant_data.user_house
       SET roof_condition   = ROUND(roof_condition   - random() * (3 + 0 * id)),
           floor_condition  = ROUND(floor_condition  - random() * (3 + 0 * id)),
           wall_condition   = ROUND(wall_condition   - random() * (3 + 0 * id)),
           window_condition = ROUND(window_condition - random() * (3 + 0 * id))
     WHERE house_type_id NOT IN (
           SELECT id
             FROM falukant_type.house h
            WHERE h.label_tr = 'under_bridge'
     );
"#;

impl HouseWorker {
    pub fn new(pool: ConnectionPool, broker: MessageBroker) -> Self {
        Self {
            base: BaseWorker::new("HouseWorker", pool, broker),
        }
    }

    fn run_loop(pool: ConnectionPool, _broker: MessageBroker, state: Arc<WorkerState>) {
        let mut last_hourly_run: Option<Instant> = None;
        let mut last_daily_run: Option<Instant> = None;

        while state.running_worker.load(Ordering::Relaxed) {
            let now = Instant::now();

            // Stündliche Aufgaben: neue Häuser erzeugen
            let should_run_hourly = match last_hourly_run {
                None => true,
                Some(last) => now.saturating_duration_since(last) >= Duration::from_secs(3600),
            };

            if should_run_hourly {
                if let Err(err) = Self::perform_task_inner(&pool) {
                    eprintln!("[HouseWorker] Fehler in performTask: {err}");
                }
                last_hourly_run = Some(now);
            }

            // Tägliche Aufgaben: Hauszustände verschlechtern
            let should_run_daily = match last_daily_run {
                None => true,
                Some(last) => now.saturating_duration_since(last) >= Duration::from_secs(24 * 3600),
            };

            if should_run_daily {
                if let Err(err) = Self::perform_house_state_change_inner(&pool) {
                    eprintln!("[HouseWorker] Fehler in performHouseStateChange: {err}");
                }
                last_daily_run = Some(now);
            }

            std::thread::sleep(Duration::from_secs(1));
        }
    }

    fn perform_task_inner(pool: &ConnectionPool) -> Result<(), DbError> {
        let mut conn = pool
            .get()
            .map_err(|e| DbError::new(format!("[HouseWorker] DB-Verbindung fehlgeschlagen: {e}")))?;

        conn.prepare("get_new_house_data", QUERY_GET_NEW_HOUSE_DATA)?;
        let rows = conn.execute("get_new_house_data", &[])?;

        conn.prepare("add_new_buyable_house", QUERY_ADD_NEW_BUYABLE_HOUSE)?;

        for row in rows {
            if let Some(house_id) = row
                .get("house_id")
                .and_then(|v| v.parse::<i32>().ok())
            {
                conn.execute("add_new_buyable_house", &[&house_id])?;
            }
        }

        Ok(())
    }

    fn perform_house_state_change_inner(pool: &ConnectionPool) -> Result<(), DbError> {
        let mut conn = pool
            .get()
            .map_err(|e| DbError::new(format!("[HouseWorker] DB-Verbindung fehlgeschlagen: {e}")))?;

        conn.prepare(
            "update_buyable_house_state",
            QUERY_UPDATE_BUYABLE_HOUSE_STATE,
        )?;
        conn.prepare(
            "update_user_house_state",
            QUERY_UPDATE_USER_HOUSE_STATE,
        )?;

        conn.execute("update_buyable_house_state", &[])?;
        conn.execute("update_user_house_state", &[])?;

        Ok(())
    }
}

impl Worker for HouseWorker {
    fn start_worker_thread(&mut self) {
        let pool = self.base.pool.clone();
        let broker = self.base.broker.clone();

        self.base
            .start_worker_with_loop(move |state: Arc<WorkerState>| {
                Self::run_loop(pool.clone(), broker.clone(), state);
            });
    }

    fn stop_worker_thread(&mut self) {
        self.base.stop_worker();
    }

    fn enable_watchdog(&mut self) {
        self.base.start_watchdog();
    }
}