/**
 * React Query hooks wrapping the intelligence API for the CP dashboard.
 *
 * (c) 2026 TWWIM UG. All rights reserved. (www.twwim.com)
 */

import { useQuery } from '@tanstack/react-query';
import { intelligenceApi, type IntelligenceGranularity, type ProductDemandSortBy } from '@/infrastructure/http/api/intelligence';

const keys = {
  today:        (tenantId: string, startISO?: string, endISO?: string) => ['intel', 'today', tenantId, startISO, endISO] as const,
  kpiSeries:    (tenantId: string, gran: IntelligenceGranularity, s?: string, e?: string) => ['intel', 'kpiSeries', tenantId, gran, s, e] as const,
  overview:     (tenantId: string, s?: string, e?: string) => ['intel', 'overview', tenantId, s, e] as const,
  errors:       (tenantId: string, s?: string, e?: string) => ['intel', 'errors', tenantId, s, e] as const,
  timeseries:   (tenantId: string, gran: IntelligenceGranularity, s?: string, e?: string) => ['intel', 'timeseries', tenantId, gran, s, e] as const,
  productDemand:(tenantId: string, sortBy: ProductDemandSortBy, s?: string, e?: string, l?: number) => ['intel', 'product', tenantId, sortBy, s, e, l] as const,
  queryPhrase:  (tenantId: string, gapOnly: boolean, s?: string, e?: string, l?: number) => ['intel', 'phrase', tenantId, gapOnly, s, e, l] as const,
  intentTheme:  (tenantId: string, s?: string, e?: string) => ['intel', 'intent', tenantId, s, e] as const,
};

// Caller passes ISO strings — Date objects are recreated on every render and
// would otherwise destabilise the queryKey (causing a refetch loop). The
// hooks parse back to Date only when actually building the fetch call.
const toDate = (s?: string | null): Date | undefined => (s ? new Date(s) : undefined);

interface DateWindow { startISO?: string; endISO?: string }

export function useTodayKpis(tenantId: string | null, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.today(tenantId ?? '', startISO, endISO),
    queryFn: () => intelligenceApi.today(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useKpiTimeseries(tenantId: string | null, granularity: IntelligenceGranularity, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.kpiSeries(tenantId ?? '', granularity, startISO, endISO),
    queryFn: () => intelligenceApi.kpiTimeseries(tenantId!, granularity, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useAnalyticsOverview(tenantId: string | null, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.overview(tenantId ?? '', startISO, endISO),
    queryFn: () => intelligenceApi.analyticsOverview(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useAnalyticsErrors(tenantId: string | null, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.errors(tenantId ?? '', startISO, endISO),
    queryFn: () => intelligenceApi.analyticsErrors(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useAnalyticsTimeseries(tenantId: string | null, granularity: IntelligenceGranularity, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.timeseries(tenantId ?? '', granularity, startISO, endISO),
    queryFn: () => intelligenceApi.analyticsTimeseries(tenantId!, granularity, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useProductDemand(tenantId: string | null, sortBy: ProductDemandSortBy, opts: DateWindow & { limit?: number } = {}) {
  const { startISO, endISO, limit } = opts;
  return useQuery({
    queryKey: keys.productDemand(tenantId ?? '', sortBy, startISO, endISO, limit),
    queryFn: () => intelligenceApi.productDemand(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO), limit, sortBy }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useQueryPhrase(tenantId: string | null, opts: DateWindow & { limit?: number; gapOnly?: boolean } = {}) {
  const { startISO, endISO, limit, gapOnly } = opts;
  return useQuery({
    queryKey: keys.queryPhrase(tenantId ?? '', !!gapOnly, startISO, endISO, limit),
    queryFn: () => intelligenceApi.queryPhrase(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO), limit, gapOnly }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}

export function useIntentTheme(tenantId: string | null, window: DateWindow = {}) {
  const { startISO, endISO } = window;
  return useQuery({
    queryKey: keys.intentTheme(tenantId ?? '', startISO, endISO),
    queryFn: () => intelligenceApi.intentTheme(tenantId!, { startDate: toDate(startISO), endDate: toDate(endISO) }),
    enabled: !!tenantId,
    select: (r) => r.data,
  });
}