import { CircularProgress } from "@mui/material";
import { Inbox } from "lucide-react";
import { Text } from "@/components/ui/text";
import type { NotificationCenter } from "./use-notification-center";
import { NotificationRow } from "./notification-row";

type NotificationFeedListProps = {
  center: NotificationCenter;
};

export function NotificationFeedList({ center }: NotificationFeedListProps) {
  if (center.isLoading) {
    return (
      <div className="flex justify-center py-16">
        <CircularProgress size={24} aria-label="Loading notifications" />
      </div>
    );
  }

  if (center.error != null && !center.hasData) {
    return (
      <Text variant="error" className="py-6">
        Notifications could not be loaded. They will retry automatically.
      </Text>
    );
  }

  if (center.sections.length === 0) {
    return (
      <div className="flex flex-col items-center justify-center gap-2 py-16">
        <Inbox size={24} aria-hidden style={{ color: "var(--color-text-muted)" }} />
        <Text variant="description" sx={{ fontSize: 13, color: "var(--color-text-muted)" }}>
          Nothing needs your attention
        </Text>
      </div>
    );
  }

  return (
    <div>
      {center.sections.map((section) => (
        <section
          key={section.reason}
          aria-label={`${section.label}, ${section.count}`}
          style={{ marginTop: 16 }}
        >
          <div className="flex items-center gap-2" style={{ marginBottom: 4 }}>
            <Text
              as="h3"
              variant="label"
              sx={{
                fontSize: 11,
                fontWeight: 500,
                textTransform: "uppercase",
                letterSpacing: "0.06em",
                color: "var(--color-text-muted)",
              }}
            >
              {section.label}
            </Text>
            <span
              style={{
                fontSize: 11,
                fontWeight: 500,
                color: "var(--color-text-secondary)",
                background: "var(--color-bg-muted)",
                borderRadius: "var(--radius-sm)",
                padding: "1px 6px",
              }}
            >
              {section.count}
            </span>
          </div>
          <ul className="m-0 list-none p-0">
            {section.items.map((item) => (
              <NotificationRow
                key={item.id}
                item={item}
                unread={center.unreadIds.has(item.id)}
                onOpen={center.open}
                onDismiss={center.dismiss}
                onAcknowledge={center.acknowledge}
                acknowledging={
                  item.target.workOrderId != null &&
                  item.target.workOrderId === center.acknowledgingWorkOrderId
                }
              />
            ))}
          </ul>
        </section>
      ))}
    </div>
  );
}