from flask import current_app
from flask_mail import Mail, Message

def send_verification_email(to_email: str, token: str) -> None:
    verify_url = f"{current_app.config['FRONTEND_URL']}/auth/verify?token={token}"
    html_body = f'Click <a href="{verify_url}">here</a> to verify your account.'
    msg = Message(
        subject="Verify your account",
        recipients=[to_email],
        html=html_body,
        sender=current_app.config.get('MAIL_DEFAULT_SENDER', 'no-reply@reward-app.local')
    )
    try:
        Mail(current_app).send(msg)
        print(f"[EMAIL to {to_email}] Verification: {verify_url}")
    except Exception:
        print(f"Failed to send email to {to_email}. Verification link: {verify_url}")

def send_reset_password_email(to_email: str, token: str) -> None:
    reset_url = f"{current_app.config['FRONTEND_URL']}/auth/reset-password?token={token}"
    html_body = f'Click <a href="{reset_url}">here</a> to reset your password.'
    msg = Message(
        subject="Reset your password",
        recipients=[to_email],
        html=html_body,
        sender=current_app.config.get('MAIL_DEFAULT_SENDER', 'no-reply@reward-app.local')
    )
    try:
        Mail(current_app).send(msg)
        print(f"[EMAIL to {to_email}] Reset password: {reset_url}")
    except Exception:
        print(f"Failed to send email to {to_email}. Reset link: {reset_url}")

def send_pin_setup_email(to_email: str, code: str) -> None:
    html_body = f"""
    <div style='font-family:sans-serif;'>
      <h2>Set up your Parent PIN</h2>
      <p>To set your Parent PIN, enter the following code in the app:</p>
      <div style='font-size:2rem; font-weight:bold; letter-spacing:0.2em; margin:1.5rem 0;'>{code}</div>
      <p>This code is valid for 10 minutes.</p>
      <p>If you did not request this, you can ignore this email.</p>
      <hr>
      <div style='color:#888;font-size:0.95rem;'>Reward App</div>
    </div>
    """
    msg = Message(
        subject="Set up your Parent PIN",
        recipients=[to_email],
        html=html_body,
        sender=current_app.config.get('MAIL_DEFAULT_SENDER', 'no-reply@reward-app.local')
    )
    try:
        Mail(current_app).send(msg)
        print(f"[EMAIL to {to_email}] Parent PIN setup code: {code}")
    except Exception:
        print(f"Failed to send email to {to_email}. Parent PIN setup code: {code}")