Refactor QUERY_GET_BEST_PRODUCTION SQL query in Worker: Improve readability and maintainability by restructuring the query with clearer aliases and consistent use of COALESCE. Enhance join conditions and ensure proper handling of character health, resulting in more accurate production worth calculations.

src/worker/director.rs

@@ -3,6 +3,7 @@ use std::collections::HashMap;
 use crate::message_broker::MessageBroker;
 use std::sync::atomic::Ordering;
 use std::sync::Arc;
+use std::sync::Mutex;
 use std::time::{Duration, Instant};
 
 use crate::db::ConnectionPool;
@@ -318,10 +319,36 @@ impl DirectorWorker {
         conn.prepare("get_to_produce", QUERY_GET_BEST_PRODUCTION)?;
         let rows = conn.execute("get_to_produce", &[&director.id, &director.branch_id])?;
         if rows.is_empty() {
+            // Debug: SQL-Vorschau nur gedrosselt loggen, damit wir die Query testen können
+            // ohne Log-Flut.
+            static LAST_EMPTY_PROD_LOG: Mutex<Option<Instant>> = Mutex::new(None);
+            let mut last = LAST_EMPTY_PROD_LOG.lock().unwrap();
+            let should_log = last
+                .map(|t| t.elapsed().as_secs() >= 60)
+                .unwrap_or(true);
+            if should_log {
+                // SQL ggf. kürzen, um Log-Flut zu vermeiden
+                let mut sql_preview = QUERY_GET_BEST_PRODUCTION.to_string();
+                const MAX_SQL_PREVIEW: usize = 1200;
+                if sql_preview.len() > MAX_SQL_PREVIEW {
+                    sql_preview.truncate(MAX_SQL_PREVIEW);
+                    sql_preview.push_str(" …");
+                }
+                eprintln!(
+                    "[DirectorWorker] Keine Produktionskandidaten für Director {} (branch_id={}). Query (get_to_produce): {} | params: director_id={}, branch_id={}",
+                    director.id,
+                    director.branch_id,
+                    sql_preview,
+                    director.id,
+                    director.branch_id
+                );
+                *last = Some(Instant::now());
+            } else {
                 eprintln!(
                     "[DirectorWorker] Keine Produktionskandidaten für Director {} gefunden.",
                     director.id
                 );
+            }
             return Ok(());
         }
 

src/worker/sql.rs

@@ -122,22 +122,66 @@ UPDATE falukant_data.vehicle v
 "#;
 
 pub const QUERY_GET_BEST_PRODUCTION: &str = r#"
-SELECT fdu.id falukant_user_id, CAST(fdu.money AS text) AS money, fdu.certificate, ftp.id product_id, ftp.label_tr, fdb.region_id,
+SELECT
-(SELECT SUM(quantity) FROM falukant_data.stock fds WHERE fds.branch_id = fdb.id) AS stock_size,
+    fdu.id AS falukant_user_id,
-COALESCE((SELECT SUM(COALESCE(fdi.quantity, 0)) FROM falukant_data.stock fds JOIN falukant_data.inventory fdi ON fdi.stock_id = fds.id WHERE fds.branch_id = fdb.id), 0) AS used_in_stock,
+    CAST(fdu.money AS text) AS money,
-(ftp.sell_cost * (fdtpw.worth_percent + (fdk_character.knowledge * 2 + fdk_director.knowledge) / 3) / 100 - 6 * ftp.category) / (300.0 * ftp.production_time) AS worth,
+    fdu.certificate,
-fdb.id AS branch_id, (SELECT COUNT(id) FROM falukant_data.production WHERE branch_id = fdb.id) AS running_productions,
+    ftp.id AS product_id,
-COALESCE((SELECT SUM(COALESCE(fdp.quantity, 0)) quantity FROM falukant_data.production fdp WHERE fdp.branch_id = fdb.id), 0) AS running_productions_quantity
+    ftp.label_tr,
+    fdb.region_id,
+    (SELECT SUM(quantity) FROM falukant_data.stock fds WHERE fds.branch_id = fdb.id) AS stock_size,
+    COALESCE(
+        (SELECT SUM(COALESCE(fdi.quantity, 0))
+           FROM falukant_data.stock fds
+           JOIN falukant_data.inventory fdi ON fdi.stock_id = fds.id
+          WHERE fds.branch_id = fdb.id),
+        0
+    ) AS used_in_stock,
+    (
+        ftp.sell_cost
+        * (
+            COALESCE(tpw.worth_percent, 100.0)
+            + (
+                (COALESCE(k_char.knowledge, 0) * 2 + COALESCE(k_dir.knowledge, 0))::double precision / 3.0
+              )
+          ) / 100.0
+        - 6 * ftp.category
+    ) / (300.0 * GREATEST(1, ftp.production_time)) AS worth,
+    fdb.id AS branch_id,
+    (SELECT COUNT(id) FROM falukant_data.production WHERE branch_id = fdb.id) AS running_productions,
+    COALESCE(
+        (SELECT SUM(COALESCE(fdp.quantity, 0))
+           FROM falukant_data.production fdp
+          WHERE fdp.branch_id = fdb.id),
+        0
+    ) AS running_productions_quantity
 FROM falukant_data.director fdd
-JOIN falukant_data.character fdc ON fdc.id = fdd.director_character_id
+JOIN falukant_data."character" fdc
-JOIN falukant_data.falukant_user fdu ON fdd.employer_user_id = fdu.id
+  ON fdc.id = fdd.director_character_id
-JOIN falukant_data.character user_character ON user_character.user_id = fdu.id
+JOIN falukant_data.falukant_user fdu
-JOIN falukant_data.branch fdb ON fdb.falukant_user_id = fdu.id AND fdb.region_id = fdc.region_id
+  ON fdd.employer_user_id = fdu.id
-JOIN falukant_data.town_product_worth fdtpw ON fdtpw.region_id = fdb.region_id
+LEFT JOIN falukant_data."character" user_character
-JOIN falukant_data.knowledge fdk_character ON fdk_character.product_id = fdtpw.product_id AND fdk_character.character_id = user_character.id
+  ON user_character.user_id = fdu.id
-JOIN falukant_data.knowledge fdk_director ON fdk_director.product_id = fdtpw.product_id AND fdk_director.character_id = fdd.director_character_id
+ AND user_character.health > 0
-JOIN falukant_type.product ftp ON ftp.id = fdtpw.product_id AND ftp.category <= fdu.certificate
+JOIN falukant_data.branch fdb
-WHERE fdd.id = $1 AND fdb.id = $2 ORDER BY worth DESC LIMIT 1;
+  ON fdb.falukant_user_id = fdu.id
+ AND fdb.region_id = fdc.region_id
+JOIN falukant_type.product ftp
+  ON ftp.category <= fdu.certificate
+LEFT JOIN falukant_data.town_product_worth tpw
+  ON tpw.region_id = fdb.region_id
+ AND tpw.product_id = ftp.id
+LEFT JOIN falukant_data.knowledge k_char
+  ON k_char.product_id = ftp.id
+ AND user_character.id IS NOT NULL
+ AND k_char.character_id = user_character.id
+LEFT JOIN falukant_data.knowledge k_dir
+  ON k_dir.product_id = ftp.id
+ AND k_dir.character_id = fdd.director_character_id
+WHERE fdd.id = $1
+  AND fdb.id = $2
+ORDER BY worth DESC
+LIMIT 1;
 "#;
 
 pub const QUERY_INSERT_PRODUCTION: &str = r#"