// Command agent demonstrates the agent loop: model + system prompt +
// toolbox, run to completion with step observation.
package main

import (
	"context"
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"os"

	"gitea.stevedudenhoeffer.com/steve/majordomo"
	"gitea.stevedudenhoeffer.com/steve/majordomo/agent"
)

func main() {
	model := flag.String("model", "ollama-cloud/minimax-m3:cloud", "model spec")
	flag.Parse()

	files := majordomo.NewToolbox("files",
		majordomo.Tool{
			Name:        "list_dir",
			Description: "List the files in a directory.",
			Parameters:  json.RawMessage(`{"type":"object","properties":{"path":{"type":"string"}},"required":["path"]}`),
			Handler: func(_ context.Context, args json.RawMessage) (any, error) {
				var p struct {
					Path string `json:"path"`
				}
				if err := json.Unmarshal(args, &p); err != nil {
					return nil, err
				}
				entries, err := os.ReadDir(p.Path)
				if err != nil {
					return nil, err
				}
				names := make([]string, 0, len(entries))
				for _, e := range entries {
					names = append(names, e.Name())
				}
				return names, nil
			},
		},
	)

	m, err := majordomo.Parse(*model)
	if err != nil {
		log.Fatalf("parse: %v", err)
	}

	a := agent.New(m, "You are a filesystem assistant. Use your tools; never invent file names.",
		agent.WithToolbox(files),
		agent.WithMaxSteps(6),
		agent.WithStepObserver(func(s agent.Step) {
			for _, call := range s.Response.ToolCalls {
				fmt.Printf("  step %d: %s(%s)\n", s.Index, call.Name, call.Arguments)
			}
		}),
	)

	res, err := a.Run(context.Background(), "What Go files are in the current directory?")
	if err != nil {
		log.Fatalf("run: %v", err)
	}
	fmt.Printf("\n%s\n(%d steps, %d tokens)\n", res.Output, len(res.Steps), res.Usage.Total())
}