package cli

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

	"github.com/DeBrosOfficial/network/pkg/environments/development"
)

// HandleDevCommand handles the dev command group
func HandleDevCommand(args []string) {
	if len(args) == 0 {
		showDevHelp()
		return
	}

	subcommand := args[0]
	subargs := args[1:]

	switch subcommand {
	case "up":
		handleDevUp(subargs)
	case "down":
		handleDevDown(subargs)
	case "status":
		handleDevStatus(subargs)
	case "logs":
		handleDevLogs(subargs)
	case "help":
		showDevHelp()
	default:
		fmt.Fprintf(os.Stderr, "Unknown dev subcommand: %s\n", subcommand)
		showDevHelp()
		os.Exit(1)
	}
}

func showDevHelp() {
	fmt.Printf("🚀 Development Environment Commands\n\n")
	fmt.Printf("Usage: dbn dev <subcommand> [options]\n\n")
	fmt.Printf("Subcommands:\n")
	fmt.Printf("  up                - Start development environment (bootstrap + 2 nodes + gateway)\n")
	fmt.Printf("  down              - Stop all development services\n")
	fmt.Printf("  status            - Show status of running services\n")
	fmt.Printf("  logs <component>  - Tail logs for a component\n")
	fmt.Printf("  help              - Show this help\n\n")
	fmt.Printf("Examples:\n")
	fmt.Printf("  dbn dev up\n")
	fmt.Printf("  dbn dev down\n")
	fmt.Printf("  dbn dev status\n")
	fmt.Printf("  dbn dev logs bootstrap --follow\n")
}

func handleDevUp(args []string) {
	ctx := context.Background()

	// Get home directory and .debros path
	homeDir, err := os.UserHomeDir()
	if err != nil {
		fmt.Fprintf(os.Stderr, "❌ Failed to get home directory: %v\n", err)
		os.Exit(1)
	}
	debrosDir := filepath.Join(homeDir, ".debros")

	// Step 1: Check dependencies
	fmt.Printf("📋 Checking dependencies...\n\n")
	checker := development.NewDependencyChecker()
	if _, err := checker.CheckAll(); err != nil {
		fmt.Fprintf(os.Stderr, "❌ %v\n", err)
		os.Exit(1)
	}
	fmt.Printf("✓ All required dependencies available\n\n")

	// Step 2: Check ports
	fmt.Printf("🔌 Checking port availability...\n\n")
	portChecker := development.NewPortChecker()
	if _, err := portChecker.CheckAll(); err != nil {
		fmt.Fprintf(os.Stderr, "❌ %v\n\n", err)
		fmt.Fprintf(os.Stderr, "Port mapping:\n")
		for port, service := range development.PortMap() {
			fmt.Fprintf(os.Stderr, "  %d - %s\n", port, service)
		}
		fmt.Fprintf(os.Stderr, "\n")
		os.Exit(1)
	}
	fmt.Printf("✓ All required ports available\n\n")

	// Step 3: Ensure configs
	fmt.Printf("⚙️  Preparing configuration files...\n\n")
	ensurer := development.NewConfigEnsurer(debrosDir)
	if err := ensurer.EnsureAll(); err != nil {
		fmt.Fprintf(os.Stderr, "❌ Failed to prepare configs: %v\n", err)
		os.Exit(1)
	}
	fmt.Printf("\n")

	// Step 4: Start services
	pm := development.NewProcessManager(debrosDir, os.Stdout)
	if err := pm.StartAll(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "❌ Error starting services: %v\n", err)
		os.Exit(1)
	}

	// Step 5: Show summary
	fmt.Printf("🎉 Development environment is running!\n\n")
	fmt.Printf("Key endpoints:\n")
	fmt.Printf("  Gateway:           http://localhost:6001\n")
	fmt.Printf("  Bootstrap IPFS:    http://localhost:4501\n")
	fmt.Printf("  Node2 IPFS:        http://localhost:4502\n")
	fmt.Printf("  Node3 IPFS:        http://localhost:4503\n")
	fmt.Printf("  Anon SOCKS:        127.0.0.1:9050\n")
	fmt.Printf("  Olric Cache:       http://localhost:3320\n\n")
	fmt.Printf("Useful commands:\n")
	fmt.Printf("  dbn dev status           - Show status\n")
	fmt.Printf("  dbn dev logs bootstrap   - Bootstrap logs\n")
	fmt.Printf("  dbn dev down             - Stop all services\n\n")
	fmt.Printf("Logs directory: %s/logs\n\n", debrosDir)
}

func handleDevDown(args []string) {
	homeDir, err := os.UserHomeDir()
	if err != nil {
		fmt.Fprintf(os.Stderr, "❌ Failed to get home directory: %v\n", err)
		os.Exit(1)
	}
	debrosDir := filepath.Join(homeDir, ".debros")

	pm := development.NewProcessManager(debrosDir, os.Stdout)
	ctx := context.Background()

	if err := pm.StopAll(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "⚠️  Error stopping services: %v\n", err)
	}
}

func handleDevStatus(args []string) {
	homeDir, err := os.UserHomeDir()
	if err != nil {
		fmt.Fprintf(os.Stderr, "❌ Failed to get home directory: %v\n", err)
		os.Exit(1)
	}
	debrosDir := filepath.Join(homeDir, ".debros")

	pm := development.NewProcessManager(debrosDir, os.Stdout)
	ctx := context.Background()

	pm.Status(ctx)
}

func handleDevLogs(args []string) {
	if len(args) == 0 {
		fmt.Fprintf(os.Stderr, "Usage: dbn dev logs <component> [--follow]\n")
		fmt.Fprintf(os.Stderr, "\nComponents: bootstrap, node2, node3, gateway, ipfs-bootstrap, ipfs-node2, ipfs-node3, olric, anon\n")
		os.Exit(1)
	}

	component := args[0]
	follow := len(args) > 1 && args[1] == "--follow"

	homeDir, err := os.UserHomeDir()
	if err != nil {
		fmt.Fprintf(os.Stderr, "❌ Failed to get home directory: %v\n", err)
		os.Exit(1)
	}
	debrosDir := filepath.Join(homeDir, ".debros")

	logPath := filepath.Join(debrosDir, "logs", fmt.Sprintf("%s.log", component))
	if _, err := os.Stat(logPath); os.IsNotExist(err) {
		fmt.Fprintf(os.Stderr, "❌ Log file not found: %s\n", logPath)
		os.Exit(1)
	}

	if follow {
		// Run tail -f
		tailCmd := fmt.Sprintf("tail -f %s", logPath)
		fmt.Printf("Following %s (press Ctrl+C to stop)...\n\n", logPath)
		// syscall.Exec doesn't work in all environments, use exec.Command instead
		cmd := exec.Command("sh", "-c", tailCmd)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		cmd.Stdin = os.Stdin
		cmd.Run()
	} else {
		// Cat the file
		data, _ := os.ReadFile(logPath)
		fmt.Print(string(data))
	}
}