1 files changed, 195 insertions, 0 deletions
diff --git a/src/configuration.rs b/src/configuration.rs
new file mode 100644
index 0000000..775d6cd
--- /dev/null
+++ b/src/configuration.rs
@@ -0,0 +1,195 @@
+/// Configuration options for rendering
+#[derive(Debug, Clone)]
+pub struct Options {
+    pub show_background: bool,
+    pub smart_label_positioning: bool,
+}
+
+impl Default for Options {
+    fn default() -> Self {
+        Self {
+            show_background: true,
+            smart_label_positioning: true,
+        }
+    }
+}
+
+/// Color configuration
+#[derive(Debug, Clone)]
+pub struct Colors {
+    pub background: String,
+    pub axis: String,
+    pub vertex: String,
+    pub label: String,
+    pub stage_foreground: String,
+    pub stage_background: String,
+    pub inertia: String,
+    pub evolution: String,
+    pub groups: Vec<String>,
+}
+
+impl Default for Colors {
+    fn default() -> Self {
+        Self {
+            background: "#FFFFFF".to_string(),
+            axis: "#0F261F".to_string(),
+            vertex: "#0F261F".to_string(),
+            label: "#0F261F".to_string(),
+            stage_foreground: "#DAE6E3".to_string(),
+            stage_background: "#FFFFFF".to_string(),
+            inertia: "#FA2B00".to_string(),
+            evolution: "#4F8FE6".to_string(),
+            groups: vec![
+                "#3A5BA0".to_string(), // Olympic Blue
+                "#C44536".to_string(), // Jasper Red
+                "#8FBE92".to_string(), // Light Porcelain Green
+                "#FAD55C".to_string(), // Naples Yellow
+                "#EC9CAB".to_string(), // Hermosa Pink
+            ],
+        }
+    }
+}
+
+/// Size configuration
+#[derive(Debug, Clone)]
+pub struct Sizes {
+    pub map_width: f64,
+    pub map_height: f64,
+    pub padding: f64,
+    pub bottom_padding: f64,
+    pub line_width: f64,
+    pub vertex_size: f64,
+    pub arrowhead_size: f64,
+    pub stage_height: f64,
+}
+
+impl Default for Sizes {
+    fn default() -> Self {
+        Self {
+            map_width: 1300.0,
+            map_height: 1000.0,
+            padding: 42.0,
+            bottom_padding: 120.0,
+            line_width: 0.5,
+            vertex_size: 25.0,
+            arrowhead_size: 10.0,
+            stage_height: 100.0,
+        }
+    }
+}
+
+/// Font configuration
+#[derive(Debug, Clone)]
+pub struct Fonts {
+    pub family: String,
+    pub axis_label: f64,
+    pub vertex_label: f64,
+    pub note: f64,
+}
+
+impl Default for Fonts {
+    fn default() -> Self {
+        Self {
+            family: "Helvetica Neue, Helvetica, Arial, sans-serif".to_string(),
+            axis_label: 14.0,
+            vertex_label: 12.0,
+            note: 12.0,
+        }
+    }
+}
+
+/// Line height configuration
+#[derive(Debug, Clone)]
+pub struct LineHeights {
+    pub vertex_label: f64,
+    pub note: f64,
+}
+
+impl Default for LineHeights {
+    fn default() -> Self {
+        Self {
+            vertex_label: 18.0,
+            note: 18.0,
+        }
+    }
+}
+
+/// Opacity configuration
+#[derive(Debug, Clone)]
+pub struct Opacity {
+    pub groups: f64,
+}
+
+impl Default for Opacity {
+    fn default() -> Self {
+        Self { groups: 0.1 }
+    }
+}
+
+/// Theme configuration
+#[derive(Debug, Clone, Default)]
+pub struct Theme {
+    pub colors: Colors,
+    pub sizes: Sizes,
+    pub fonts: Fonts,
+    pub line_heights: LineHeights,
+    pub opacity: Opacity,
+}
+
+/// Main configuration struct
+#[derive(Debug, Clone, Default)]
+pub struct Configuration {
+    pub options: Options,
+    pub theme: Theme,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_default_configuration() {
+        let config = Configuration::default();
+
+        // Test options
+        assert!(config.options.show_background);
+        assert!(config.options.smart_label_positioning);
+
+        // Test colors (matching JS implementation exactly)
+        assert_eq!(config.theme.colors.background, "#FFFFFF");
+        assert_eq!(config.theme.colors.axis, "#0F261F");
+        assert_eq!(config.theme.colors.vertex, "#0F261F");
+        assert_eq!(config.theme.colors.label, "#0F261F");
+        assert_eq!(config.theme.colors.stage_foreground, "#DAE6E3");
+        assert_eq!(config.theme.colors.stage_background, "#FFFFFF");
+        assert_eq!(config.theme.colors.inertia, "#FA2B00");
+        assert_eq!(config.theme.colors.evolution, "#4F8FE6");
+        assert_eq!(config.theme.colors.groups.len(), 5);
+
+        // Test sizes (matching JS implementation with extra bottom padding for wrapped labels)
+        assert_eq!(config.theme.sizes.map_width, 1300.0);
+        assert_eq!(config.theme.sizes.map_height, 1000.0);
+        assert_eq!(config.theme.sizes.padding, 42.0);
+        assert_eq!(config.theme.sizes.bottom_padding, 120.0);
+        assert_eq!(config.theme.sizes.line_width, 0.5);
+        assert_eq!(config.theme.sizes.vertex_size, 25.0);
+        assert_eq!(config.theme.sizes.arrowhead_size, 10.0);
+        assert_eq!(config.theme.sizes.stage_height, 100.0);
+
+        // Test fonts
+        assert_eq!(
+            config.theme.fonts.family,
+            "Helvetica Neue, Helvetica, Arial, sans-serif"
+        );
+        assert_eq!(config.theme.fonts.axis_label, 14.0);
+        assert_eq!(config.theme.fonts.vertex_label, 12.0);
+        assert_eq!(config.theme.fonts.note, 12.0);
+
+        // Test line heights
+        assert_eq!(config.theme.line_heights.vertex_label, 18.0);
+        assert_eq!(config.theme.line_heights.note, 18.0);
+
+        // Test opacity
+        assert_eq!(config.theme.opacity.groups, 0.1);
+    }
+}