import { Ionicons } from "@expo/vector-icons";
import { router } from "expo-router";
import { Pressable, ScrollView, View } from "react-native";
import { useTranslation } from "react-i18next";
import { Badge } from "@/components/ui/Badge";
import { Button } from "@/components/ui/Button";
import { Card } from "@/components/ui/Card";
import { EmptyState } from "@/components/ui/EmptyState";
import { AppHeader } from "@/components/ui/Header";
import { Screen } from "@/components/ui/Screen";
import { Text } from "@/components/ui/Text";
import { routes } from "@/lib/routes";
import {
  useNotificationStore,
  type NotificationKind,
} from "@/lib/stores/notificationStore";
import { colors, gutter } from "@/lib/theme";

const kindMeta: Record<
  NotificationKind,
  { label: string; icon: keyof typeof Ionicons.glyphMap; tone: "brand" | "info" | "warn" | "neutral" | "danger" }
> = {
  order: { label: "Order", icon: "cube-outline", tone: "info" },
  rx: { label: "Rx", icon: "document-text-outline", tone: "warn" },
  dose: { label: "Dose", icon: "alarm-outline", tone: "brand" },
  loyalty: { label: "Loyalty", icon: "star-outline", tone: "brand" },
  promo: { label: "Promo", icon: "pricetag-outline", tone: "neutral" },
  system: { label: "Tips", icon: "information-circle-outline", tone: "neutral" },
};

export default function NotificationsScreen() {
  const { t } = useTranslation();
  const items = useNotificationStore((s) => s.items);
  const markRead = useNotificationStore((s) => s.markRead);
  const markAllRead = useNotificationStore((s) => s.markAllRead);
  const remove = useNotificationStore((s) => s.remove);
  const unread = items.filter((n) => !n.read).length;

  return (
    <Screen>
      <AppHeader
        title={t("common.notifications")}
        subtitle={
          unread
            ? `${unread} unread · separate from your order history`
            : "Alerts for doses, Rx, loyalty and orders"
        }
        right={
          unread ? (
            <Pressable onPress={markAllRead} hitSlop={8}>
              <Text variant="label" color={colors.brandText}>
                Read all
              </Text>
            </Pressable>
          ) : undefined
        }
      />
      <ScrollView
        contentContainerStyle={{
          paddingHorizontal: gutter,
          paddingBottom: 40,
          gap: 10,
        }}
      >
        <Card elevated={false} tone="brand">
          <Text variant="bodySm" color={colors.muted}>
            This inbox is not your Orders list. Order history lives under Profile → Orders.
            Notifications include dose reminders, Rx updates, loyalty, promos, and status
            alerts that may deep-link into an order.
          </Text>
          <Button
            title="Open order history"
            variant="outline"
            size="md"
            fullWidth={false}
            style={{ marginTop: 12 }}
            onPress={() => router.push(routes.orders)}
          />
        </Card>

        {items.length === 0 ? (
          <EmptyState
            icon="notifications-outline"
            title="No notifications"
            body="Dose reminders, Rx status, and order alerts will show up here."
            actionTitle="Browse shop"
            onAction={() => router.push(routes.shop)}
          />
        ) : (
          items.map((n) => {
            const meta = kindMeta[n.kind];
            return (
              <Pressable
                key={n.id}
                onPress={() => {
                  markRead(n.id);
                  if (n.href) router.push(n.href as never);
                }}
                style={{
                  backgroundColor: n.read ? colors.surface : colors.brandWash,
                  borderRadius: 18,
                  borderWidth: 1,
                  borderColor: n.read ? colors.line : colors.brandBorder,
                  padding: 14,
                }}
              >
                <View style={{ flexDirection: "row", gap: 12, alignItems: "flex-start" }}>
                  <View
                    style={{
                      width: 40,
                      height: 40,
                      borderRadius: 12,
                      backgroundColor: colors.surface,
                      alignItems: "center",
                      justifyContent: "center",
                      borderWidth: 1,
                      borderColor: colors.line,
                    }}
                  >
                    <Ionicons name={meta.icon} size={18} color={colors.brandText} />
                  </View>
                  <View style={{ flex: 1 }}>
                    <View
                      style={{
                        flexDirection: "row",
                        alignItems: "center",
                        gap: 8,
                        flexWrap: "wrap",
                      }}
                    >
                      <Badge label={meta.label} tone={meta.tone} />
                      {!n.read ? <Badge label="New" solid /> : null}
                    </View>
                    <Text variant="h3" style={{ marginTop: 8 }}>
                      {n.title}
                    </Text>
                    <Text variant="bodySm" color={colors.muted} style={{ marginTop: 4 }}>
                      {n.body}
                    </Text>
                    <Text variant="caption" color={colors.subtle} style={{ marginTop: 8 }}>
                      {new Date(n.createdAt).toLocaleString()}
                    </Text>
                  </View>
                  <Pressable
                    onPress={() => remove(n.id)}
                    hitSlop={8}
                    accessibilityLabel="Dismiss"
                  >
                    <Ionicons name="close" size={18} color={colors.subtle} />
                  </Pressable>
                </View>
              </Pressable>
            );
          })
        )}
      </ScrollView>
    </Screen>
  );
}