use serde_json::Value;
use super::super::tool_adapter::{ToolAdapter, append_hint_to_schema};

/// Pencil MCP 工具适配器
/// 
/// 为 Pencil 绘图工具提供特定的 Schema 优化:
/// 1. 处理非标准的视觉属性字段 (cornerRadius, strokeWidth 等)
/// 2. 优化文件路径参数的描述
/// 3. 添加 Pencil 特定的使用提示
pub struct PencilAdapter;

impl ToolAdapter for PencilAdapter {
    fn matches(&self, tool_name: &str) -> bool {
        tool_name.starts_with("mcp__pencil__")
    }
    
    fn pre_process(&self, schema: &mut Value) -> Result<(), String> {
        if let Value::Object(map) = schema {
            // 1. 处理视觉属性字段
            self.handle_visual_properties(map);
            
            // 2. 优化文件路径参数
            self.optimize_path_parameters(map);
        }
        Ok(())
    }
}

impl PencilAdapter {
    /// 处理 Pencil 特有的视觉属性字段
    fn handle_visual_properties(&self, map: &mut serde_json::Map<String, Value>) {
        // Pencil 使用的非标准视觉属性
        let visual_props = ["cornerRadius", "strokeWidth", "opacity", "rotation"];
        
        for prop in visual_props {
            if map.contains_key(prop) {
                let hint = format!("Visual property: {}", prop);
                append_hint_to_schema(&mut Value::Object(map.clone()), &hint);
            }
        }
        
        // 处理 properties 中的视觉属性
        if let Some(Value::Object(props)) = map.get_mut("properties") {
            for (key, value) in props.iter_mut() {
                if visual_props.contains(&key.as_str()) {
                    if let Value::Object(prop_map) = value {
                        prop_map
                            .entry("description".to_string())
                            .and_modify(|d| {
                                if let Value::String(s) = d {
                                    if !s.contains("visual property") {
                                        *s = format!("{} (visual property for UI elements)", s);
                                    }
                                }
                            })
                            .or_insert_with(|| {
                                Value::String("Visual property for UI elements".to_string())
                            });
                    }
                }
            }
        }
    }
    
    /// 优化文件路径相关参数的描述
    fn optimize_path_parameters(&self, map: &mut serde_json::Map<String, Value>) {
        if let Some(Value::Object(props)) = map.get_mut("properties") {
            for (key, value) in props.iter_mut() {
                // 识别路径相关参数
                let is_path_param = key.contains("path") 
                    || key.contains("file") 
                    || key.contains("File")
                    || key.contains("Path");
                
                if is_path_param {
                    if let Value::Object(prop_map) = value {
                        prop_map
                            .entry("description".to_string())
                            .and_modify(|d| {
                                if let Value::String(s) = d {
                                    if !s.contains("absolute path") {
                                        *s = format!("{} (use absolute path, e.g., /path/to/file.pen)", s);
                                    }
                                }
                            })
                            .or_insert_with(|| {
                                Value::String("File path (use absolute path)".to_string())
                            });
                    }
                }
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use serde_json::json;

    #[test]
    fn test_pencil_adapter_matches() {
        let adapter = PencilAdapter;
        assert!(adapter.matches("mcp__pencil__create_shape"));
        assert!(adapter.matches("mcp__pencil__update_properties"));
        assert!(!adapter.matches("mcp__filesystem__read"));
    }

    #[test]
    fn test_visual_properties_handling() {
        let adapter = PencilAdapter;
        let mut schema = json!({
            "type": "object",
            "properties": {
                "cornerRadius": {
                    "type": "number"
                },
                "color": {
                    "type": "string"
                }
            }
        });
        
        adapter.pre_process(&mut schema).unwrap();
        
        // 验证 cornerRadius 的 description 被添加
        assert!(schema["properties"]["cornerRadius"]["description"].is_string());
        let desc = schema["properties"]["cornerRadius"]["description"]
            .as_str()
            .unwrap();
        assert!(desc.contains("Visual property"));
    }

    #[test]
    fn test_path_parameter_optimization() {
        let adapter = PencilAdapter;
        let mut schema = json!({
            "type": "object",
            "properties": {
                "filePath": {
                    "type": "string",
                    "description": "Path to the file"
                }
            }
        });
        
        adapter.pre_process(&mut schema).unwrap();
        
        let desc = schema["properties"]["filePath"]["description"]
            .as_str()
            .unwrap();
        assert!(desc.contains("absolute path"));
    }
}