// Demo: Minimal HAP Binary
// This demonstrates the core architecture without problematic dependencies

package main

import (
	"bufio"
	"context"
	"fmt"
	"log"
	"os"
	"os/signal"
	"strings"
	"syscall"
	"time"
)

// Minimal types to demonstrate the architecture
type BinaryType int

const (
	BinaryTypeAgent BinaryType = iota
	BinaryTypeHAP
)

func (bt BinaryType) String() string {
	switch bt {
	case BinaryTypeAgent:
		return "agent"
	case BinaryTypeHAP:
		return "hap"
	default:
		return "unknown"
	}
}

// Minimal runtime config  
type RuntimeConfig struct {
	BinaryType BinaryType
	HTTPPort   int
	HealthPort int
}

// Minimal services
type RuntimeServices struct {
	Config     *Config
	NodeID     string
	BinaryType BinaryType
	HTTPPort   int
	HealthPort int
}

type Config struct {
	Agent struct {
		ID             string
		Role           string
		Specialization string
	}
}

// Minimal runtime interface
type Runtime interface {
	Initialize(ctx context.Context, cfg RuntimeConfig) (*RuntimeServices, error)
	Start(ctx context.Context, services *RuntimeServices) error
	Stop(ctx context.Context, services *RuntimeServices) error
}

// Implementation
type StandardRuntime struct {
	services *RuntimeServices
}

func NewRuntime() Runtime {
	return &StandardRuntime{}
}

func (r *StandardRuntime) Initialize(ctx context.Context, cfg RuntimeConfig) (*RuntimeServices, error) {
	fmt.Printf("🚀 Initializing BZZZ runtime (%s mode)\n", cfg.BinaryType.String())
	
	services := &RuntimeServices{
		Config: &Config{},
		NodeID: fmt.Sprintf("node-%d", time.Now().Unix()),
		BinaryType: cfg.BinaryType,
		HTTPPort: cfg.HTTPPort,
		HealthPort: cfg.HealthPort,
	}
	
	// Set some demo config
	services.Config.Agent.ID = fmt.Sprintf("agent-%s-%d", cfg.BinaryType.String(), time.Now().Unix())
	services.Config.Agent.Role = "human_coordinator"
	services.Config.Agent.Specialization = "human_interaction"
	
	r.services = services
	fmt.Println("✅ Runtime initialization completed successfully")
	return services, nil
}

func (r *StandardRuntime) Start(ctx context.Context, services *RuntimeServices) error {
	fmt.Println("🚀 Starting BZZZ runtime services")
	
	// Simulate service startup
	fmt.Printf("🌐 HTTP API server started on :%d\n", services.HTTPPort)
	fmt.Printf("🏥 Health endpoints available at http://localhost:%d/health\n", services.HealthPort)
	
	fmt.Println("✅ All runtime services started successfully")
	return nil
}

func (r *StandardRuntime) Stop(ctx context.Context, services *RuntimeServices) error {
	fmt.Println("🛑 Shutting down BZZZ runtime services")
	fmt.Println("✅ Graceful shutdown completed")
	return nil
}

// HAP-specific terminal interface
type TerminalInterface struct {
	services *RuntimeServices
	running  bool
	scanner  *bufio.Scanner
}

func NewTerminalInterface(services *RuntimeServices) *TerminalInterface {
	return &TerminalInterface{
		services: services,
		running:  false,
		scanner:  bufio.NewScanner(os.Stdin),
	}
}

func (ti *TerminalInterface) Start(ctx context.Context) error {
	fmt.Println("👤 Starting Human Agent Portal terminal interface")
	
	ti.displayWelcome()
	
	// Start command processing in background
	go ti.processCommands(ctx)
	
	ti.running = true
	fmt.Println("✅ Terminal interface ready for human interaction")
	return nil
}

func (ti *TerminalInterface) displayWelcome() {
	fmt.Println("\n" + strings.Repeat("=", 60))
	fmt.Println("🎯 BZZZ Human Agent Portal (HAP) - Demo")
	fmt.Println("   Welcome to collaborative AI task coordination")
	fmt.Println(strings.Repeat("=", 60))
	fmt.Printf("📍 Node ID: %s\n", ti.services.NodeID)
	fmt.Printf("🤖 Agent ID: %s\n", ti.services.Config.Agent.ID)
	fmt.Printf("🎭 Role: %s\n", ti.services.Config.Agent.Role)
	
	fmt.Println("\n📋 Available Commands:")
	fmt.Println("  status     - Show system status")
	fmt.Println("  send <msg> - Send message (simulated)")
	fmt.Println("  help       - Show this help message")
	fmt.Println("  quit/exit  - Exit the interface")
	fmt.Println(strings.Repeat("-", 60))
	fmt.Print("HAP> ")
}

func (ti *TerminalInterface) processCommands(ctx context.Context) {
	for ti.running && ti.scanner.Scan() {
		input := strings.TrimSpace(ti.scanner.Text())
		if input == "" {
			fmt.Print("HAP> ")
			continue
		}

		parts := strings.Fields(input)
		command := strings.ToLower(parts[0])

		switch command {
		case "quit", "exit":
			ti.running = false
			return

		case "help":
			ti.showHelp()

		case "status":
			ti.showStatus()

		case "send":
			if len(parts) < 2 {
				fmt.Println("❌ Usage: send <message>")
			} else {
				message := strings.Join(parts[1:], " ")
				ti.sendMessage(message)
			}

		default:
			fmt.Printf("❌ Unknown command: %s (type 'help' for available commands)\n", command)
		}

		fmt.Print("HAP> ")
	}
}

func (ti *TerminalInterface) showHelp() {
	fmt.Println("\n📋 HAP Commands:")
	fmt.Println("  status     - Show current system status")
	fmt.Println("  send <msg> - Send message to coordination channel")
	fmt.Println("  help       - Show this help message")
	fmt.Println("  quit/exit  - Exit the Human Agent Portal")
}

func (ti *TerminalInterface) showStatus() {
	fmt.Println("\n📊 System Status:")
	fmt.Println(strings.Repeat("-", 40))
	fmt.Printf("🌐 P2P Status: Connected (simulated)\n")
	fmt.Printf("📍 Node ID: %s\n", ti.services.NodeID)
	fmt.Printf("🤖 Agent ID: %s\n", ti.services.Config.Agent.ID)
	fmt.Printf("🎭 Role: %s\n", ti.services.Config.Agent.Role)
	fmt.Printf("📡 PubSub: ✅ Active (simulated)\n")
	fmt.Printf("🔗 UCXI: ✅ Active (simulated)\n")
	fmt.Printf("❤️ Health: ✅ Healthy\n")
	fmt.Printf("⏰ Uptime: %s\n", "5m30s (simulated)")
}

func (ti *TerminalInterface) sendMessage(message string) {
	fmt.Printf("📤 Message sent to coordination channel (simulated)\n")
	fmt.Printf("💬 \"%s\"\n", message)
	fmt.Printf("🎯 Broadcasting to P2P network...\n")
}

func (ti *TerminalInterface) Stop(ctx context.Context) error {
	fmt.Println("🛑 Stopping terminal interface")
	ti.running = false
	return nil
}

func (ti *TerminalInterface) IsRunning() bool {
	return ti.running
}

func main() {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	fmt.Println("👤 BZZZ Human Agent Portal (Demo)")
	fmt.Println("==================================")

	// Create runtime
	rt := NewRuntime()

	// Initialize with HAP-specific config (different ports to avoid conflicts)
	runtimeConfig := RuntimeConfig{
		BinaryType: BinaryTypeHAP,
		HTTPPort:   8090, // Different from agent
		HealthPort: 8091, // Different from agent  
	}

	// Initialize runtime services
	services, err := rt.Initialize(ctx, runtimeConfig)
	if err != nil {
		log.Fatalf("Failed to initialize runtime: %v", err)
	}

	// Start shared services
	if err := rt.Start(ctx, services); err != nil {
		log.Fatalf("Failed to start runtime: %v", err)
	}

	// Initialize HAP-specific components
	hapInterface := NewTerminalInterface(services)
	if err := hapInterface.Start(ctx); err != nil {
		log.Fatalf("Failed to start HAP interface: %v", err)
	}

	fmt.Println("💬 Terminal interface ready for human interaction")
	fmt.Println("🔍 HAP monitoring P2P network for collaboration opportunities")
	fmt.Println("✅ BZZZ Human Agent Portal fully operational")
	
	// Show architecture separation
	fmt.Printf("\n📊 Architecture Demo:\n")
	fmt.Printf("  Binary Type: %s\n", services.BinaryType.String())
	fmt.Printf("  Shared Runtime: ✅ Initialized\n")
	fmt.Printf("  HAP Interface: ✅ Started\n")
	fmt.Printf("  HTTP Port: %d (different from agent)\n", services.HTTPPort)
	fmt.Printf("  Health Port: %d (different from agent)\n", services.HealthPort)
	fmt.Printf("  P2P Ready: ✅ (simulated)\n")

	// Wait for shutdown signals or terminal interface to stop
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)

	// Wait for either signal or terminal interface to stop
	go func() {
		for hapInterface.IsRunning() {
			select {
			case <-ctx.Done():
				return
			default:
				time.Sleep(100 * time.Millisecond)
				continue
			}
		}
		// If terminal interface stops, trigger shutdown
		sigChan <- syscall.SIGTERM
	}()

	<-sigChan

	fmt.Println("\n🛑 Shutting down Human Agent Portal...")

	// Stop HAP interface
	if err := hapInterface.Stop(ctx); err != nil {
		fmt.Printf("HAP interface shutdown error: %v\n", err)
	}

	// Stop runtime services
	if err := rt.Stop(ctx, services); err != nil {
		fmt.Printf("Runtime shutdown error: %v\n", err)
	}

	fmt.Println("✅ BZZZ Human Agent Portal shutdown completed")
}