package cmd

import (
	"fmt"
	"os"
	"path/filepath"

	"github.com/BitterSecurity/Decepticon/clients/launcher/internal/compose"
	"github.com/BitterSecurity/Decepticon/clients/launcher/internal/config"
	"github.com/spf13/cobra"
)

var mcpCmd = &cobra.Command{
	Use:   "mcp",
	Short: "Connect coding agents to a running Decepticon instance",
	Long: `Expose Decepticon's MCP tools to coding agents over the Model
Context Protocol (MCP).

Start Decepticon first ('decepticon start'), then point your coding
agent at this MCP server so it can drive a running Decepticon
instance: check status and health, read logs, and follow engagement
workflows.`,
	Example: `  decepticon mcp serve             Serve Decepticon MCP tools over stdio

  # Register with Claude Code (run after 'decepticon start'):
  claude mcp add decepticon -- decepticon mcp serve`,
}

var mcpServeCmd = &cobra.Command{
	Use:   "serve",
	Short: "Serve Decepticon MCP tools over stdio",
	Long:  "Serve Decepticon MCP tools over stdio for Claude Code, Codex, or another MCP client. Start Decepticon first.",
	Args:  cobra.NoArgs,
	RunE: func(cmd *cobra.Command, args []string) error {
		home := config.DecepticonHome()
		for _, name := range []string{"docker-compose.yml", ".env"} {
			if _, err := os.Stat(filepath.Join(home, name)); err != nil {
				return fmt.Errorf("Decepticon is not installed at %s; run decepticon onboard first: %w", home, err)
			}
		}
		return compose.New().RunMCPStdio()
	},
}

func init() {
	mcpCmd.AddCommand(mcpServeCmd)
	rootCmd.AddCommand(mcpCmd)
}