Add optional file logging and fix board offsets

Introduce --log CLI flag to enable logging to
war_in_tunnels.log via simplelog.

src/app/widgets/board.rs

@@ -23,13 +23,13 @@ impl BoardWidget {
         let rows: u16 = area_height / CELL_HIGHT;
         let cols: u16 = area_width / CELL_WIDTH;
 
-        let h_max_offset: usize = if app.states.settings.map_height as u16 > rows {
+        let v_max_offset: usize = if app.states.settings.map_height as u16 > rows {
             app.states.settings.map_height as u16 - rows
         } else {
             0
         } as usize;
 
-        let v_max_offset: usize = if app.states.settings.map_width as u16 > cols {
+        let h_max_offset: usize = if app.states.settings.map_width as u16 > cols {
             app.states.settings.map_width as u16 - cols
         } else {
             0

src/cli.rs

@@ -97,6 +97,13 @@ pub struct Cli {
         default_value = "120"
     )]
     pub skill_points_limit: u16,
+
+    #[arg(
+        long,
+        help = "Enable logging to file (default: disabled)",
+        default_value_t = false
+    )]
+    pub log: bool,
 }
 
 pub fn get_args() -> Cli {

src/lib.rs

@@ -1,2 +1,3 @@
 pub mod app;
 pub mod cli;
+pub mod logs;

src/logs.rs

@@ -0,0 +1,11 @@
+use simplelog::{Config, LevelFilter, WriteLogger};
+use std::fs::File;
+
+pub fn init_logger() {
+    WriteLogger::init(
+        LevelFilter::Info,
+        Config::default(),
+        File::create("war_in_tunnels.log").expect("Failed to create log file"),
+    )
+    .expect("Failed to initialize logger");
+}

src/main.rs

@@ -7,10 +7,15 @@ use std::{
 use war_in_tunnels::{
     app::{App, Event, handle_input_events},
     cli::{Cli, get_args},
+    logs::init_logger,
 };
 
 fn main() -> Result<()> {
     let args: Cli = get_args();
+    if args.log {
+        init_logger();
+    }
+
     let mut terminal: Terminal<CrosstermBackend<Stdout>> = ratatui::init();
     let mut app: App = App::new(args);