"use client";

import { useQuery } from "@tanstack/react-query";
import { PageHeader } from "@/components/ds";
import { useTenantId } from "@/hooks/useTenantId";
import {
  CrmCountsGrid,
  CrmPageLoader,
  CrmPageError,
  CrmServiceBadge,
  useCrmCounts,
} from "@/modules/crm/pages/shared";
import { CrmBreadcrumbs } from "@/modules/crm/components/CrmBreadcrumbs";
import { CrmStatGrid } from "@/modules/crm/design-system";
import { crmApi } from "@/modules/crm/services/crm-api";

function DashboardShell({
  title,
  description,
  children,
}: {
  title: string;
  description: string;
  children: React.ReactNode;
}) {
  return (
    <div>
      <CrmBreadcrumbs items={[{ label: "داشبورد", href: "/crm/sales/dashboard/overview" }, { label: title }]} />
      <PageHeader title={title} description={description} actions={<CrmServiceBadge />} />
      {children}
    </div>
  );
}

export function OverviewDashboard() {
  const { tenantId } = useTenantId();
  if (!tenantId) return <CrmPageLoader />;
  return (
    <DashboardShell title="نمای کلی" description="خلاصه وضعیت CRM tenant — داده واقعی از API.">
      <CrmCountsGrid tenantId={tenantId} />
    </DashboardShell>
  );
}

export function SalesDashboard() {
  const { tenantId } = useTenantId();
  const q = useCrmCounts(tenantId);
  const goalsQ = useQuery({
    queryKey: ["crm", tenantId, "goals"],
    queryFn: () => crmApi.goals.list(tenantId!, { page: 1, page_size: 50 }),
    enabled: !!tenantId,
  });
  const targetsQ = useQuery({
    queryKey: ["crm", tenantId, "targets"],
    queryFn: () => crmApi.targets.list(tenantId!, { page: 1, page_size: 50 }),
    enabled: !!tenantId,
  });

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

  return (
    <DashboardShell title="داشبورد فروش" description="معاملات، اهداف و اهداف کمی فروش.">
      <CrmStatGrid
        stats={[
          { label: "معاملات باز", value: q.data!.openDeals },
          { label: "معاملات برنده", value: q.data!.wonDeals },
          { label: "اهداف فروش", value: goalsQ.data?.length ?? 0 },
          { label: "تارگت‌ها", value: targetsQ.data?.length ?? 0 },
        ]}
      />
    </DashboardShell>
  );
}

export function PipelineDashboard() {
  const { tenantId } = useTenantId();
  const pipelinesQ = useQuery({
    queryKey: ["crm", tenantId, "pipelines"],
    queryFn: () => crmApi.pipelines.list(tenantId!, { page: 1, page_size: 100 }),
    enabled: !!tenantId,
  });
  const oppsQ = useQuery({
    queryKey: ["crm", tenantId, "opportunities"],
    queryFn: () => crmApi.opportunities.list(tenantId!, { page: 1, page_size: 500 }),
    enabled: !!tenantId,
  });

  if (!tenantId || pipelinesQ.isLoading || oppsQ.isLoading) return <CrmPageLoader />;
  if (pipelinesQ.error) return <CrmPageError error={pipelinesQ.error} onRetry={() => pipelinesQ.refetch()} />;

  const opps = oppsQ.data ?? [];
  const byPipeline = (pipelinesQ.data ?? []).map((p) => ({
    label: p.name,
    value: opps.filter((o) => o.pipeline_id === p.id).length,
  }));

  return (
    <DashboardShell title="داشبورد قیف" description="توزیع معاملات در قیف‌های فروش.">
      <CrmStatGrid stats={byPipeline.length ? byPipeline : [{ label: "قیف", value: 0 }]} />
    </DashboardShell>
  );
}

export function LeadDashboard() {
  const { tenantId } = useTenantId();
  const q = useQuery({
    queryKey: ["crm", tenantId, "leads"],
    queryFn: () => crmApi.leads.list(tenantId!, { page: 1, page_size: 500 }),
    enabled: !!tenantId,
  });

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

  const leads = q.data ?? [];
  const byStatus = ["new", "contacted", "qualified", "converted", "lost"].map((s) => ({
    label: s,
    value: leads.filter((l) => l.status === s && !l.is_deleted).length,
  }));

  return (
    <DashboardShell title="داشبورد سرنخ" description="وضعیت سرنخ‌ها بر اساس lifecycle.">
      <CrmStatGrid stats={[{ label: "کل سرنخ", value: leads.length }, ...byStatus]} />
    </DashboardShell>
  );
}

export function ActivityDashboard() {
  const { tenantId } = useTenantId();
  const q = useQuery({
    queryKey: ["crm", tenantId, "activity-dash"],
    queryFn: async () => {
      const [activities, tasks, meetings] = await Promise.all([
        crmApi.activities.list(tenantId!, { page: 1, page_size: 500 }),
        crmApi.tasks.list(tenantId!, { page: 1, page_size: 500 }),
        crmApi.meetings.list(tenantId!, { page: 1, page_size: 500 }),
      ]);
      return { activities, tasks, meetings };
    },
    enabled: !!tenantId,
  });

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

  return (
    <DashboardShell title="داشبورد فعالیت" description="فعالیت‌ها، وظایف و جلسات.">
      <CrmStatGrid
        stats={[
          { label: "فعالیت‌ها", value: q.data!.activities.length },
          { label: "وظایف", value: q.data!.tasks.length },
          { label: "جلسات", value: q.data!.meetings.length },
          {
            label: "فعالیت تکمیل‌شده",
            value: q.data!.activities.filter((a) => a.status === "completed").length,
          },
        ]}
      />
    </DashboardShell>
  );
}

export function CalendarDashboard() {
  const { tenantId } = useTenantId();
  const q = useQuery({
    queryKey: ["crm", tenantId, "meetings"],
    queryFn: () => crmApi.meetings.list(tenantId!, { page: 1, page_size: 500 }),
    enabled: !!tenantId,
  });

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

  const upcoming = (q.data ?? [])
    .filter((m) => new Date(m.starts_at) >= new Date())
    .slice(0, 10);

  return (
    <DashboardShell title="تقویم" description="جلسات آینده — بر اساس API meetings.">
      <div className="space-y-2">
        {upcoming.map((m) => (
          <div
            key={m.id}
            className="rounded-xl border border-[var(--border)] bg-[var(--surface)] px-4 py-3 shadow-[var(--shadow-sm)]"
          >
            <p className="font-medium text-secondary">{m.subject}</p>
            <p className="text-xs text-[var(--muted)]">
              {new Date(m.starts_at).toLocaleString("fa-IR")}
              {m.location ? ` — ${m.location}` : ""}
            </p>
          </div>
        ))}
        {upcoming.length === 0 ? (
          <p className="text-sm text-[var(--muted)]">جلسه آینده‌ای ثبت نشده.</p>
        ) : null}
      </div>
    </DashboardShell>
  );
}