package tfa

import (
	"fmt"
	"strings"
	"time"

	"clapclap/internal/auth/jwt"
	"clapclap/internal/email"
	"clapclap/internal/env"

	"clapclap/internal/uuid"
)

// DispatchVerificationEmail generates a token and sends the verification email.
// Notice it returns an error instead of logging it directly.
func DispatchVerificationEmail(userID uuid.UUID, userEmail string) error {
	secret := env.C.JWT_SECRET
	clientURL := strings.TrimRight(env.C.API_URL, "/")

	tokenString, err := jwt.GenerateActionToken(secret, userID, "email_verification", 24*time.Hour)
	if err != nil {
		return fmt.Errorf("failed to generate verification token: %w", err)
	}

	verifyLink := fmt.Sprintf("%s/auth/verify-email?token=%s", clientURL, tokenString)

	htmlContent := fmt.Sprintf(`
		<div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
			<h2 style="color: #333;">Welcome to clapclap! 🚀</h2>
			<p>Please click the button below to verify your email address. This link will expire in 24 hours.</p>
			<a href="%s" style="display: inline-block; padding: 10px 20px; color: white; background-color: #007bff; text-decoration: none; border-radius: 5px; margin-top: 15px;">Verify Email</a>
			<p style="color: #888; font-size: 12px; margin-top: 30px;">If you didn't request this, you can safely ignore this email.</p>
		</div>
	`, verifyLink)

	emailObj := email.Email{
		To:      userEmail,
		Subject: "Verify your Account - clapclap",
		Content: htmlContent,
	}

	if err := email.Send(emailObj); err != nil {
		return fmt.Errorf("smtp error sending verification email: %w", err)
	}

	return nil
}

func DispatchPasswordResetEmail(userID uuid.UUID, userEmail string) error {
	secret := env.C.JWT_SECRET
	clientURL := strings.TrimRight(env.C.CLIENT_URL, "/")

	tokenString, err := jwt.GenerateActionToken(secret, userID, "password_reset", 15*time.Minute)
	if err != nil {
		return fmt.Errorf("failed to generate password reset token: %w", err)
	}

	resetLink := fmt.Sprintf("%s/change-password?token=%s", clientURL, tokenString)

	htmlContent := fmt.Sprintf(`
		<div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
			<h2 style="color: #333;">Password Reset Request</h2>
			<p>We received a request to reset your password. Click the button below to choose a new one. This link will expire in 15 minutes.</p>
			<a href="%s" style="display: inline-block; padding: 10px 20px; color: white; background-color: #d9534f; text-decoration: none; border-radius: 5px; margin-top: 15px;">Reset Password</a>
			<p style="color: #888; font-size: 12px; margin-top: 30px;">If you didn't request a password reset, you can safely ignore this email.</p>
		</div>
	`, resetLink)

	emailObj := email.Email{
		To:      userEmail,
		Subject: "Password Reset Request",
		Content: htmlContent,
	}

	if err := email.Send(emailObj); err != nil {
		return fmt.Errorf("smtp error sending password reset email: %w", err)
	}

	return nil
}