1 files changed, 279 insertions, 0 deletions
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 00000000..0022d230
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,279 @@
+use std::path::PathBuf;
+
+use crossterm::event::{KeyCode, KeyModifiers};
+use serde::Deserialize;
+use tracing::warn;
+
+#[derive(Debug, Default, Deserialize)]
+#[serde(default)]
+pub struct Config {
+    pub keys: KeysConfig,
+    pub ui: UiConfig,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(default)]
+pub struct KeysConfig {
+    /// Prefix key to toggle navigate mode (e.g. "ctrl+s", "ctrl+a", "ctrl+b").
+    pub prefix: String,
+    /// Split pane vertically (side by side). Default: "v"
+    pub split_vertical: String,
+    /// Split pane horizontally (stacked). Default: "-"
+    pub split_horizontal: String,
+    /// Close the focused pane. Default: "x"
+    pub close_pane: String,
+    /// Toggle fullscreen for the focused pane. Default: "f"
+    pub fullscreen: String,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(default)]
+pub struct UiConfig {
+    pub sidebar_width: u16,
+    /// Ask for confirmation before closing a workspace. Default: true.
+    pub confirm_close: bool,
+    /// Accent color for highlights, borders, and navigation UI.
+    /// Accepts hex (#89b4fa), named colors (cyan, blue), or RGB (rgb(137,180,250)).
+    pub accent: String,
+}
+
+impl Default for KeysConfig {
+    fn default() -> Self {
+        Self {
+            prefix: "ctrl+s".into(),
+            split_vertical: "v".into(),
+            split_horizontal: "-".into(),
+            close_pane: "x".into(),
+            fullscreen: "f".into(),
+        }
+    }
+}
+
+impl Default for UiConfig {
+    fn default() -> Self {
+        Self {
+            sidebar_width: 26,
+            confirm_close: true,
+            accent: "cyan".into(),
+        }
+    }
+}
+
+impl Config {
+    pub fn load() -> Self {
+        let path = config_path();
+        if path.exists() {
+            match std::fs::read_to_string(&path) {
+                Ok(content) => match toml::from_str(&content) {
+                    Ok(config) => return config,
+                    Err(e) => warn!(err = %e, "config parse error, using defaults"),
+                },
+                Err(e) => warn!(err = %e, "config read error, using defaults"),
+            }
+        }
+        Self::default()
+    }
+
+    pub fn prefix_key(&self) -> (KeyCode, KeyModifiers) {
+        parse_key_combo(&self.keys.prefix)
+    }
+
+    /// Human-readable label for the prefix key (shown in status bar).
+    pub fn prefix_label(&self) -> String {
+        self.keys.prefix.clone()
+    }
+
+    /// Parsed keybinds for navigate mode actions.
+    pub fn keybinds(&self) -> Keybinds {
+        Keybinds {
+            split_vertical: parse_key_combo(&self.keys.split_vertical),
+            split_horizontal: parse_key_combo(&self.keys.split_horizontal),
+            close_pane: parse_key_combo(&self.keys.close_pane),
+            fullscreen: parse_key_combo(&self.keys.fullscreen),
+        }
+    }
+}
+
+/// Parsed keybinds for navigate mode actions.
+#[derive(Debug, Clone)]
+pub struct Keybinds {
+    pub split_vertical: (KeyCode, KeyModifiers),
+    pub split_horizontal: (KeyCode, KeyModifiers),
+    pub close_pane: (KeyCode, KeyModifiers),
+    pub fullscreen: (KeyCode, KeyModifiers),
+}
+
+/// Parse a color string into a ratatui Color.
+/// Supports: hex (#rrggbb, #rgb), named colors, rgb(r,g,b).
+pub fn parse_color(s: &str) -> ratatui::style::Color {
+    use ratatui::style::Color;
+    let s = s.trim().to_lowercase();
+
+    // Hex: #rrggbb or #rgb
+    if let Some(hex) = s.strip_prefix('#') {
+        if hex.len() == 6 {
+            if let (Ok(r), Ok(g), Ok(b)) = (
+                u8::from_str_radix(&hex[0..2], 16),
+                u8::from_str_radix(&hex[2..4], 16),
+                u8::from_str_radix(&hex[4..6], 16),
+            ) {
+                return Color::Rgb(r, g, b);
+            }
+        } else if hex.len() == 3 {
+            let chars: Vec<u8> = hex
+                .chars()
+                .filter_map(|c| u8::from_str_radix(&c.to_string(), 16).ok())
+                .collect();
+            if chars.len() == 3 {
+                return Color::Rgb(chars[0] * 17, chars[1] * 17, chars[2] * 17);
+            }
+        }
+    }
+
+    // rgb(r, g, b)
+    if let Some(inner) = s.strip_prefix("rgb(").and_then(|s| s.strip_suffix(')')) {
+        let parts: Vec<&str> = inner.split(',').collect();
+        if parts.len() == 3 {
+            if let (Ok(r), Ok(g), Ok(b)) = (
+                parts[0].trim().parse::<u8>(),
+                parts[1].trim().parse::<u8>(),
+                parts[2].trim().parse::<u8>(),
+            ) {
+                return Color::Rgb(r, g, b);
+            }
+        }
+    }
+
+    // Named colors
+    match s.as_str() {
+        "black" => Color::Black,
+        "red" => Color::Red,
+        "green" => Color::Green,
+        "yellow" => Color::Yellow,
+        "blue" => Color::Blue,
+        "magenta" | "purple" => Color::Magenta,
+        "cyan" => Color::Cyan,
+        "white" => Color::White,
+        "gray" | "grey" => Color::Gray,
+        "darkgray" | "darkgrey" => Color::DarkGray,
+        "lightred" => Color::LightRed,
+        "lightgreen" => Color::LightGreen,
+        "lightyellow" => Color::LightYellow,
+        "lightblue" => Color::LightBlue,
+        "lightmagenta" => Color::LightMagenta,
+        "lightcyan" => Color::LightCyan,
+        _ => {
+            warn!(color = s, "unknown color, defaulting to cyan");
+            Color::Cyan
+        }
+    }
+}
+
+fn config_path() -> PathBuf {
+    if let Ok(dir) = std::env::var("XDG_CONFIG_HOME") {
+        PathBuf::from(dir).join("herdr/config.toml")
+    } else if let Ok(home) = std::env::var("HOME") {
+        PathBuf::from(home).join(".config/herdr/config.toml")
+    } else {
+        PathBuf::from("/tmp/herdr/config.toml")
+    }
+}
+
+fn parse_key_combo(s: &str) -> (KeyCode, KeyModifiers) {
+    let parts: Vec<&str> = s.split('+').collect();
+    let mut modifiers = KeyModifiers::empty();
+    let mut key_str = "";
+
+    for part in &parts {
+        match part.trim().to_lowercase().as_str() {
+            "ctrl" | "control" => modifiers |= KeyModifiers::CONTROL,
+            "shift" => modifiers |= KeyModifiers::SHIFT,
+            "alt" | "meta" => modifiers |= KeyModifiers::ALT,
+            _ => key_str = part.trim(),
+        }
+    }
+
+    let code = match key_str.to_lowercase().as_str() {
+        "space" | " " => KeyCode::Char(' '),
+        "enter" | "return" => KeyCode::Enter,
+        "esc" | "escape" => KeyCode::Esc,
+        "tab" => KeyCode::Tab,
+        "backspace" | "bs" => KeyCode::Backspace,
+        s if s.len() == 1 => KeyCode::Char(s.chars().next().unwrap()),
+        s if s.starts_with('f') => s[1..]
+            .parse::<u8>()
+            .map(KeyCode::F)
+            .unwrap_or(KeyCode::Char('s')),
+        _ => KeyCode::Char('s'),
+    };
+
+    (code, modifiers)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crossterm::event::{KeyCode, KeyModifiers};
+
+    #[test]
+    fn parse_simple_char() {
+        assert_eq!(parse_key_combo("v"), (KeyCode::Char('v'), KeyModifiers::empty()));
+    }
+
+    #[test]
+    fn parse_ctrl_combo() {
+        assert_eq!(parse_key_combo("ctrl+s"), (KeyCode::Char('s'), KeyModifiers::CONTROL));
+    }
+
+    #[test]
+    fn parse_special_key() {
+        assert_eq!(parse_key_combo("enter"), (KeyCode::Enter, KeyModifiers::empty()));
+        assert_eq!(parse_key_combo("tab"), (KeyCode::Tab, KeyModifiers::empty()));
+        assert_eq!(parse_key_combo("esc"), (KeyCode::Esc, KeyModifiers::empty()));
+    }
+
+    #[test]
+    fn parse_ctrl_shift() {
+        assert_eq!(
+            parse_key_combo("ctrl+shift+a"),
+            (KeyCode::Char('a'), KeyModifiers::CONTROL | KeyModifiers::SHIFT)
+        );
+    }
+
+    #[test]
+    fn parse_f_key() {
+        assert_eq!(parse_key_combo("f5"), (KeyCode::F(5), KeyModifiers::empty()));
+    }
+
+    #[test]
+    fn default_keybinds_parse() {
+        let config = Config::default();
+        let kb = config.keybinds();
+        assert_eq!(kb.split_vertical.0, KeyCode::Char('v'));
+        assert_eq!(kb.split_horizontal.0, KeyCode::Char('-'));
+        assert_eq!(kb.close_pane.0, KeyCode::Char('x'));
+        assert_eq!(kb.fullscreen.0, KeyCode::Char('f'));
+    }
+
+    #[test]
+    fn custom_keybinds_from_toml() {
+        let toml = r#"
+[keys]
+prefix = "ctrl+a"
+split_vertical = "s"
+split_horizontal = "shift+s"
+close_pane = "ctrl+w"
+fullscreen = "z"
+"#;
+        let config: Config = toml::from_str(toml).unwrap();
+        let (code, mods) = config.prefix_key();
+        assert_eq!(code, KeyCode::Char('a'));
+        assert_eq!(mods, KeyModifiers::CONTROL);
+
+        let kb = config.keybinds();
+        assert_eq!(kb.split_vertical.0, KeyCode::Char('s'));
+        assert_eq!(kb.split_horizontal, (KeyCode::Char('s'), KeyModifiers::SHIFT));
+        assert_eq!(kb.close_pane, (KeyCode::Char('w'), KeyModifiers::CONTROL));
+        assert_eq!(kb.fullscreen.0, KeyCode::Char('z'));
+    }
+}