package cli

import (
	"bufio"
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"strings"
	"syscall"

	"github.com/spf13/cobra"
	"golang.org/x/term"
)

const apiURL = "http://localhost:8080"

var rootCmd = &cobra.Command{
	Use:   "termbox",
	Short: "Termbox CLI - A secure messaging platform",
	Long:  "Termbox CLI allows you to register, login, and send messages securely.",
}

var registerCmd = &cobra.Command{
	Use:   "register",
	Short: "Register a new account",
	Long:  "Register a new account with username, email, and password. You'll need to verify your email.",
	Run:   runRegister,
}

var loginCmd = &cobra.Command{
	Use:   "login",
	Short: "Login to your account",
	Long:  "Login to your account with username and password.",
	Run:   runLogin,
}

var verifyCmd = &cobra.Command{
	Use:   "verify",
	Short: "Verify your email address",
	Long:  "Verify your email address with the code sent to your email.",
	Run:   runVerify,
}

func init() {
	rootCmd.AddCommand(registerCmd)
	rootCmd.AddCommand(loginCmd)
	rootCmd.AddCommand(verifyCmd)
}

func Execute() error {
	return rootCmd.Execute()
}

func runRegister(cmd *cobra.Command, args []string) {
	fmt.Print("Username: ")
	reader := bufio.NewReader(os.Stdin)
	username, _ := reader.ReadString('\n')
	username = strings.TrimSpace(username)

	fmt.Print("Email: ")
	email, _ := reader.ReadString('\n')
	email = strings.TrimSpace(email)

	fmt.Print("Password: ")
	passwordBytes, err := term.ReadPassword(int(syscall.Stdin))
	if err != nil {
		fmt.Printf("Error reading password: %v\n", err)
		return
	}
	password := string(passwordBytes)
	fmt.Println()

	requestBody, _ := json.Marshal(map[string]string{
		"username": username,
		"email":    email,
		"password": password,
	})

	resp, err := http.Post(apiURL+"/auth/register", "application/json", bytes.NewBuffer(requestBody))
	if err != nil {
		fmt.Printf("Error registering: %v\n", err)
		return
	}
	defer resp.Body.Close()

	var response map[string]interface{}
	json.NewDecoder(resp.Body).Decode(&response)

	if resp.StatusCode == http.StatusCreated {
		fmt.Printf("✅ Registration successful! Check your email (%s) for verification code.\n", email)
		fmt.Println("Run 'termbox verify' to complete registration.")
	} else {
		fmt.Printf("❌ Registration failed: %s\n", response["error"])
	}
}

func runVerify(cmd *cobra.Command, args []string) {
	fmt.Print("Email: ")
	reader := bufio.NewReader(os.Stdin)
	email, _ := reader.ReadString('\n')
	email = strings.TrimSpace(email)

	fmt.Print("Verification code: ")
	code, _ := reader.ReadString('\n')
	code = strings.TrimSpace(code)

	requestBody, _ := json.Marshal(map[string]string{
		"email": email,
		"code":  code,
	})

	resp, err := http.Post(apiURL+"/auth/verify", "application/json", bytes.NewBuffer(requestBody))
	if err != nil {
		fmt.Printf("Error verifying: %v\n", err)
		return
	}
	defer resp.Body.Close()

	var response map[string]interface{}
	json.NewDecoder(resp.Body).Decode(&response)

	if resp.StatusCode == http.StatusOK {
		fmt.Println("✅ Account verified successfully! You can now login.")
	} else {
		fmt.Printf("❌ Verification failed: %s\n", response["error"])
	}
}

func runLogin(cmd *cobra.Command, args []string) {
	fmt.Print("Username: ")
	reader := bufio.NewReader(os.Stdin)
	username, _ := reader.ReadString('\n')
	username = strings.TrimSpace(username)

	fmt.Print("Password: ")
	passwordBytes, err := term.ReadPassword(int(syscall.Stdin))
	if err != nil {
		fmt.Printf("Error reading password: %v\n", err)
		return
	}
	password := string(passwordBytes)
	fmt.Println()

	requestBody, _ := json.Marshal(map[string]string{
		"username": username,
		"password": password,
	})

	resp, err := http.Post(apiURL+"/auth/login", "application/json", bytes.NewBuffer(requestBody))
	if err != nil {
		fmt.Printf("Error logging in: %v\n", err)
		return
	}
	defer resp.Body.Close()

	var response map[string]interface{}
	json.NewDecoder(resp.Body).Decode(&response)

	if resp.StatusCode == http.StatusOK {
		user := response["user"].(map[string]interface{})
		fmt.Printf("✅ Login successful! Welcome back, %s!\n", user["username"])
	} else {
		fmt.Printf("❌ Login failed: %s\n", response["error"])
	}
}