"use client";

import { useState } from "react";
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { toast } from "sonner";
import { Button, Dialog, FormField, Input, PageHeader, EmptyState } from "@/components/ds";
import { loyaltyApi } from "@/modules/loyalty/services/loyalty-api";
import { useTenantId } from "@/hooks/useTenantId";
import { LoyaltyBreadcrumbs } from "@/modules/loyalty/components/LoyaltyBreadcrumbs";
import { LoyaltyPageLoader, LoyaltyPageError } from "@/modules/loyalty/pages/shared";
import { LoyaltyTablePage, LoyaltyStatusChip } from "@/modules/loyalty/design-system";

export default function ReferralsPage() {
  const { tenantId } = useTenantId();
  const qc = useQueryClient();
  const [open, setOpen] = useState(false);
  const [code, setCode] = useState("");
  const [refereeId, setRefereeId] = useState("");

  const q = useQuery({
    queryKey: ["loyalty", tenantId, "referrals"],
    queryFn: async () => {
      const page = await loyaltyApi.referrals.list(tenantId!, { page: 1, page_size: 200 });
      return "items" in page ? page.items : (page as never);
    },
    enabled: !!tenantId,
  });

  const attrM = useMutation({
    mutationFn: () =>
      loyaltyApi.referrals.attribute(tenantId!, {
        code,
        referee_member_id: refereeId,
      }),
    onSuccess: () => {
      toast.success("ارجاع ثبت شد");
      setOpen(false);
      qc.invalidateQueries({ queryKey: ["loyalty", tenantId, "referrals"] });
    },
    onError: (e: Error) => toast.error(e.message),
  });

  const act = useMutation({
    mutationFn: ({ id, action }: { id: string; action: "convert" | "reward" | "cancel" }) => {
      if (action === "convert") return loyaltyApi.referrals.convert(tenantId!, id);
      if (action === "reward") return loyaltyApi.referrals.reward(tenantId!, id);
      return loyaltyApi.referrals.cancel(tenantId!, id, { reason: "cancelled from UI" });
    },
    onSuccess: () => {
      toast.success("به‌روز شد");
      qc.invalidateQueries({ queryKey: ["loyalty", tenantId, "referrals"] });
    },
    onError: (e: Error) => toast.error(e.message),
  });

  if (!tenantId || q.isLoading) return <LoyaltyPageLoader />;
  if (q.error) return <LoyaltyPageError error={q.error} onRetry={() => q.refetch()} />;

  return (
    <div>
      <LoyaltyBreadcrumbs items={[{ label: "ارجاعات" }]} />
      <PageHeader
        title="ارجاعات"
        description="ثبت attribution و تبدیل/پاداش/لغو."
        actions={<Button onClick={() => setOpen(true)}>ثبت ارجاع</Button>}
      />
      <LoyaltyTablePage
        title="Attributionها"
        columns={[
          { key: "id", header: "شناسه" },
          {
            key: "status",
            header: "وضعیت",
            render: (r) => (
              <LoyaltyStatusChip status={String(r.status)} domain="referral_attribution" />
            ),
          },
          { key: "referrer_member_id", header: "معرف" },
          { key: "referee_member_id", header: "معرفی‌شونده" },
          {
            key: "actions",
            header: "عملیات",
            searchable: false,
            render: (r) => (
              <div className="flex gap-1">
                <Button size="sm" variant="ghost" onClick={() => act.mutate({ id: String(r.id), action: "convert" })}>
                  تبدیل
                </Button>
                <Button size="sm" variant="ghost" onClick={() => act.mutate({ id: String(r.id), action: "reward" })}>
                  پاداش
                </Button>
                <Button size="sm" variant="ghost" onClick={() => act.mutate({ id: String(r.id), action: "cancel" })}>
                  لغو
                </Button>
              </div>
            ),
          },
        ]}
        rows={(q.data ?? []) as unknown as Record<string, unknown>[]}
        empty={<EmptyState title="ارجاعی نیست" />}
      />
      <Dialog open={open} onClose={() => setOpen(false)} title="ثبت ارجاع">
        <div className="space-y-3">
          <FormField label="کد معرفی">
            <Input value={code} onChange={(e) => setCode(e.target.value)} />
          </FormField>
          <FormField label="شناسه عضو معرفی‌شونده">
            <Input value={refereeId} onChange={(e) => setRefereeId(e.target.value)} />
          </FormField>
          <Button loading={attrM.isPending} onClick={() => attrM.mutate()}>
            ثبت
          </Button>
        </div>
      </Dialog>
    </div>
  );
}