package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"os"
	"time"

	"shadowmo/Cognition-OS/runtime/ledger"
)

func main() {
	path := flag.String("file", "ledger-demo.jsonl", "path to ledger file")
	op := flag.String("op", "append", "operation: append|verify|show")
	flag.Parse()

	l, err := ledger.Open(*path)
	if err != nil {
		fmt.Fprintln(os.Stderr, "open error:", err)
		os.Exit(1)
	}
	defer l.Close()

	switch *op {
	case "append":
		payload := map[string]interface{}{
			"msg": fmt.Sprintf("demo event at %s", time.Now().Format(time.RFC3339)),
		}
		h, err := l.Append("demo_event", payload)
		if err != nil {
			fmt.Fprintln(os.Stderr, "append error:", err)
			os.Exit(1)
		}
		fmt.Println("appended hash:", h)
	case "verify":
		if err := l.Verify(); err != nil {
			fmt.Fprintln(os.Stderr, "verify failed:", err)
			os.Exit(2)
		}
		fmt.Println("ledger verified ok")
	case "show":
		f, err := os.Open(*path)
		if err != nil { fmt.Fprintln(os.Stderr, "open:", err); os.Exit(1) }
		defer f.Close()
		dec := json.NewDecoder(f)
		for {
			var e map[string]interface{}
			if err := dec.Decode(&e); err != nil { break }
			b, _ := json.MarshalIndent(e, "", "  ")
			fmt.Println(string(b))
		}
	default:
		fmt.Fprintln(os.Stderr, "unknown op")
	}
}