import httpx
import logging
from config.settings import get_settings

logger = logging.getLogger(__name__)
settings = get_settings()

FROM_EMAIL = "CodeNexus <noreply@codenexus.qzz.io>"


async def send_email(to: str, subject: str, html: str) -> bool:
    """Send email via Resend. Returns True on success."""
    try:
        async with httpx.AsyncClient(timeout=15.0) as client:
            response = await client.post(
                "https://api.resend.com/emails",
                headers={"Authorization": f"Bearer {settings.resend_api_key}", "Content-Type": "application/json"},
                json={"from": FROM_EMAIL, "to": [to], "subject": subject, "html": html}
            )
            if response.status_code not in (200, 201):
                logger.error(f"Resend error {response.status_code}: {response.text}")
                return False
            return True
    except Exception as e:
        logger.error(f"Email send failed: {e}")
        return False


async def send_welcome_email(to: str, name: str) -> bool:
    return await send_email(
        to=to,
        subject="Welcome to CodeNexus! 🚀",
        html=f"""
        <div style="font-family:Inter,sans-serif;max-width:600px;margin:0 auto;background:#030712;color:#fff;padding:40px;border-radius:16px;">
          <h1 style="color:#6366f1;font-size:28px;margin-bottom:8px;">Welcome to CodeNexus!</h1>
          <p style="color:#9ca3af;font-size:16px;">Hi {name}, your account is ready.</p>
          <p style="color:#d1d5db;">Start writing and analyzing code right now — it's completely free.</p>
          <a href="https://codenexus.qzz.io/editor" style="display:inline-block;margin-top:24px;padding:14px 28px;background:#6366f1;color:#fff;border-radius:10px;text-decoration:none;font-weight:600;">
            Open Editor →
          </a>
          <p style="color:#4b5563;font-size:12px;margin-top:32px;">CodeNexus — Where Code Meets Intelligence</p>
        </div>
        """
    )


async def send_support_notification_to_admin(admin_email: str, user_email: str, category: str, message: str) -> bool:
    return await send_email(
        to=admin_email,
        subject=f"[CodeNexus Support] New {category} ticket from {user_email}",
        html=f"""
        <div style="font-family:Inter,sans-serif;max-width:600px;margin:0 auto;background:#030712;color:#fff;padding:40px;border-radius:16px;">
          <h2 style="color:#f59e0b;">New Support Ticket</h2>
          <p><strong>From:</strong> {user_email}</p>
          <p><strong>Category:</strong> {category}</p>
          <p><strong>Message:</strong></p>
          <div style="background:#111827;padding:16px;border-radius:8px;color:#d1d5db;">{message}</div>
          <a href="https://codenexus.qzz.io/admin" style="display:inline-block;margin-top:24px;padding:14px 28px;background:#6366f1;color:#fff;border-radius:10px;text-decoration:none;font-weight:600;">
            View in Admin Panel →
          </a>
        </div>
        """
    )


async def send_support_confirmation_to_user(to: str, category: str) -> bool:
    return await send_email(
        to=to,
        subject="We received your support request — CodeNexus",
        html=f"""
        <div style="font-family:Inter,sans-serif;max-width:600px;margin:0 auto;background:#030712;color:#fff;padding:40px;border-radius:16px;">
          <h2 style="color:#6366f1;">We got your message!</h2>
          <p style="color:#9ca3af;">Thanks for reaching out about <strong>{category}</strong>.</p>
          <p style="color:#d1d5db;">Our team will review your request and get back to you as soon as possible.</p>
          <p style="color:#4b5563;font-size:12px;margin-top:32px;">CodeNexus — Where Code Meets Intelligence</p>
        </div>
        """
    )


async def send_ticket_reply_to_user(to: str, reply: str) -> bool:
    return await send_email(
        to=to,
        subject="Reply to your CodeNexus support ticket",
        html=f"""
        <div style="font-family:Inter,sans-serif;max-width:600px;margin:0 auto;background:#030712;color:#fff;padding:40px;border-radius:16px;">
          <h2 style="color:#6366f1;">Support Reply</h2>
          <div style="background:#111827;padding:16px;border-radius:8px;color:#d1d5db;">{reply}</div>
          <p style="color:#4b5563;font-size:12px;margin-top:32px;">CodeNexus Support Team</p>
        </div>
        """
    )