// SRC-06: gemeinsamer Aufbau der bool.must-Liste für Such- und
// Facetten-Route — statische Feldnamen, keine dynamische SQL-/Klausel-
// Bildung (gleiche Konvention wie mail/internal/search/facets.go
// buildFilteredMust).
import { isFacetField } from "./facetFields";

const FIELD_TENANT_SLUG = "tenant_slug";

export interface AppliedFilter {
  field: string;
  value: string;
}

export function parseFilterParams(values: string[]): AppliedFilter[] {
  const filters: AppliedFilter[] = [];
  for (const raw of values) {
    const sep = raw.indexOf(":");
    if (sep <= 0) continue;
    const field = raw.slice(0, sep);
    const value = raw.slice(sep + 1);
    if (!isFacetField(field) || value === "") continue;
    filters.push({ field, value });
  }
  return filters;
}

export function buildMust(tenantSlug: string, query: string, filters: AppliedFilter[]): Record<string, unknown>[] {
  const must: Record<string, unknown>[] = [{ equals: { [FIELD_TENANT_SLUG]: tenantSlug } }];
  if (query) {
    must.push({ query_string: query });
  }
  for (const f of filters) {
    must.push({ equals: { [f.field]: f.value } });
  }
  return must;
}