chasm-cli 2.0.0

// Copyright (c) 2024-2026 Nervosys LLC
// SPDX-License-Identifier: AGPL-3.0-only
//! MCP Server Types - JSON-RPC message definitions for MCP protocol

#![allow(dead_code)]

use serde::{Deserialize, Serialize};
use std::collections::HashMap;

/// JSON-RPC Request
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct JsonRpcRequest {
    pub jsonrpc: String,
    pub id: Option<serde_json::Value>,
    pub method: String,
    #[serde(default)]
    pub params: serde_json::Value,
}

/// JSON-RPC Response
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct JsonRpcResponse {
    pub jsonrpc: String,
    pub id: Option<serde_json::Value>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub result: Option<serde_json::Value>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub error: Option<JsonRpcError>,
}

/// JSON-RPC Error
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct JsonRpcError {
    pub code: i32,
    pub message: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub data: Option<serde_json::Value>,
}

impl JsonRpcResponse {
    pub fn success(id: Option<serde_json::Value>, result: serde_json::Value) -> Self {
        Self {
            jsonrpc: "2.0".to_string(),
            id,
            result: Some(result),
            error: None,
        }
    }

    pub fn error(id: Option<serde_json::Value>, code: i32, message: String) -> Self {
        Self {
            jsonrpc: "2.0".to_string(),
            id,
            result: None,
            error: Some(JsonRpcError {
                code,
                message,
                data: None,
            }),
        }
    }
}

// ============================================================================
// MCP Protocol Types
// ============================================================================

/// Server capabilities
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ServerCapabilities {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub tools: Option<ToolsCapability>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub resources: Option<ResourcesCapability>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub prompts: Option<PromptsCapability>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ToolsCapability {
    #[serde(rename = "listChanged", skip_serializing_if = "Option::is_none")]
    pub list_changed: Option<bool>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourcesCapability {
    #[serde(rename = "listChanged", skip_serializing_if = "Option::is_none")]
    pub list_changed: Option<bool>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub subscribe: Option<bool>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PromptsCapability {
    #[serde(rename = "listChanged", skip_serializing_if = "Option::is_none")]
    pub list_changed: Option<bool>,
}

/// Initialize request params
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct InitializeParams {
    #[serde(rename = "protocolVersion")]
    pub protocol_version: String,
    pub capabilities: ClientCapabilities,
    #[serde(rename = "clientInfo")]
    pub client_info: ClientInfo,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ClientCapabilities {
    #[serde(skip_serializing_if = "Option::is_none")]
    pub roots: Option<serde_json::Value>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub sampling: Option<serde_json::Value>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ClientInfo {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub version: Option<String>,
}

/// Initialize response
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct InitializeResult {
    #[serde(rename = "protocolVersion")]
    pub protocol_version: String,
    pub capabilities: ServerCapabilities,
    #[serde(rename = "serverInfo")]
    pub server_info: ServerInfo,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ServerInfo {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub version: Option<String>,
}

// ============================================================================
// Tool Types
// ============================================================================

/// Tool definition
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Tool {
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub description: Option<String>,
    #[serde(rename = "inputSchema")]
    pub input_schema: serde_json::Value,
}

/// Tool call request params
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CallToolParams {
    pub name: String,
    #[serde(default)]
    pub arguments: HashMap<String, serde_json::Value>,
}

/// Tool call result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CallToolResult {
    pub content: Vec<ToolContent>,
    #[serde(rename = "isError", skip_serializing_if = "Option::is_none")]
    pub is_error: Option<bool>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum ToolContent {
    #[serde(rename = "text")]
    Text { text: String },
    #[serde(rename = "image")]
    Image { data: String, mime_type: String },
    #[serde(rename = "resource")]
    Resource { resource: ResourceContent },
}

// ============================================================================
// Resource Types
// ============================================================================

/// Resource definition
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Resource {
    pub uri: String,
    pub name: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub description: Option<String>,
    #[serde(rename = "mimeType", skip_serializing_if = "Option::is_none")]
    pub mime_type: Option<String>,
}

/// Resource content
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResourceContent {
    pub uri: String,
    #[serde(rename = "mimeType", skip_serializing_if = "Option::is_none")]
    pub mime_type: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub text: Option<String>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub blob: Option<String>,
}

/// Read resource params
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ReadResourceParams {
    pub uri: String,
}

/// Read resource result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ReadResourceResult {
    pub contents: Vec<ResourceContent>,
}

// ============================================================================
// CSM-Specific Types
// ============================================================================

/// Workspace info for MCP responses
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct WorkspaceInfo {
    pub hash: String,
    pub project_path: String,
    pub session_count: usize,
    pub has_chats: bool,
}

/// Session info for MCP responses
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SessionInfo {
    pub id: String,
    pub title: String,
    pub message_count: usize,
    pub last_modified: String,
    pub is_orphaned: bool,
    pub workspace_hash: String,
    pub file_path: String,
}

/// Orphaned session info
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OrphanedSessionInfo {
    pub id: String,
    pub title: String,
    pub message_count: usize,
    pub file_path: String,
}