import { clsx } from "clsx";

interface ResourceMonthTemplateCompleteness {
  scope: "resource_month";
  isAuditReady: boolean;
  isRecommendedComplete: boolean;
  recommendedColumnCount: number;
  selectedRecommendedColumnCount: number;
  minimumAuditColumnCount: number;
  selectedMinimumAuditColumnCount: number;
  missingRecommendedColumns: string[];
  missingMinimumAuditColumns: string[];
}

interface ResourceMonthConfigSectionProps<
  TBlueprint extends { id: string; label: string; description: string },
> {
  periodMonth: string;
  onPeriodMonthChange: (value: string) => void;
  blueprints: TBlueprint[];
  onApplyBlueprint: (blueprint: TBlueprint) => void;
  completeness: ResourceMonthTemplateCompleteness | null;
  selectedTemplate: { isShared?: boolean; isOwner?: boolean } | null;
  hasTemplateDraftChanges: boolean;
  selectedColumns: Set<string>;
  onToggleColumn: (column: string) => void;
  columnLabelMap: Map<string, string>;
  recommendedColumns: readonly string[];
  summarizeMissing: (columns: string[], labelMap: Map<string, string>) => string;
}

export function ResourceMonthConfigSection<
  TBlueprint extends { id: string; label: string; description: string },
>({
  periodMonth,
  onPeriodMonthChange,
  blueprints,
  onApplyBlueprint,
  completeness,
  selectedTemplate,
  hasTemplateDraftChanges,
  selectedColumns,
  onToggleColumn,
  columnLabelMap,
  recommendedColumns,
  summarizeMissing,
}: ResourceMonthConfigSectionProps<TBlueprint>) {
  return (
    <div className="mt-4 space-y-4 rounded-2xl border border-emerald-200 bg-emerald-50/70 p-4 dark:border-emerald-900/60 dark:bg-emerald-950/20">
      <div className="flex flex-wrap items-end gap-4">
        <div>
          <label className="mb-1 block text-sm font-medium text-emerald-900 dark:text-emerald-200">
            Period month
          </label>
          <input
            type="month"
            value={periodMonth}
            onChange={(e) => onPeriodMonthChange(e.target.value)}
            className="rounded-xl border border-emerald-300 bg-white px-3 py-2 text-sm text-gray-700 focus:border-emerald-500 focus:ring-emerald-500 dark:border-emerald-900 dark:bg-slate-950 dark:text-gray-300"
          />
        </div>
        <p className="max-w-2xl text-sm text-emerald-900/80 dark:text-emerald-200/80">
          Resource Months uses the CapaKraken holiday and absence logic directly. SAH, booked hours
          and chargeability are calculated per resource and month with country, state and city
          context.
        </p>
      </div>

      <div className="grid gap-3 lg:grid-cols-3">
        {blueprints.map((blueprint) => (
          <button
            key={blueprint.id}
            type="button"
            onClick={() => onApplyBlueprint(blueprint)}
            className="rounded-2xl border border-emerald-200 bg-white/80 p-4 text-left transition hover:border-emerald-400 hover:bg-white dark:border-emerald-900/70 dark:bg-slate-950/60 dark:hover:border-emerald-700"
          >
            <div className="text-sm font-semibold text-emerald-950 dark:text-emerald-100">
              {blueprint.label}
            </div>
            <p className="mt-1 text-xs leading-5 text-emerald-900/75 dark:text-emerald-200/75">
              {blueprint.description}
            </p>
          </button>
        ))}
      </div>

      <div className="rounded-2xl border border-emerald-200/80 bg-white/60 p-4 dark:border-emerald-900/60 dark:bg-slate-950/40">
        {completeness ? (
          <div className="mb-4 rounded-2xl border border-emerald-200/80 bg-emerald-50/80 p-4 dark:border-emerald-900/60 dark:bg-emerald-950/20">
            <div className="flex flex-wrap items-center gap-2">
              <span
                className={clsx(
                  "rounded-full px-2.5 py-1 text-[11px] font-semibold uppercase tracking-[0.14em]",
                  completeness.isAuditReady
                    ? "bg-emerald-500 text-white"
                    : "bg-amber-100 text-amber-800 dark:bg-amber-950/60 dark:text-amber-200",
                )}
              >
                {completeness.isAuditReady ? "Audit ready" : "Audit gap"}
              </span>
              <span className="rounded-full bg-white px-2.5 py-1 text-[11px] font-medium text-emerald-900 dark:bg-slate-950 dark:text-emerald-100">
                {completeness.selectedMinimumAuditColumnCount}/
                {completeness.minimumAuditColumnCount} minimum audit columns
              </span>
              <span className="rounded-full bg-white px-2.5 py-1 text-[11px] font-medium text-emerald-900 dark:bg-slate-950 dark:text-emerald-100">
                {completeness.selectedRecommendedColumnCount}/{completeness.recommendedColumnCount}{" "}
                recommended columns
              </span>
              <span className="rounded-full bg-white px-2.5 py-1 text-[11px] text-emerald-900/80 dark:bg-slate-950 dark:text-emerald-200/80">
                {selectedTemplate && !hasTemplateDraftChanges
                  ? "Saved template status"
                  : "Current builder status"}
              </span>
            </div>
            {completeness.missingMinimumAuditColumns.length > 0 ? (
              <p className="mt-3 text-xs text-amber-800 dark:text-amber-200">
                Missing audit/export basis columns:{" "}
                {summarizeMissing(completeness.missingMinimumAuditColumns, columnLabelMap)}
              </p>
            ) : completeness.missingRecommendedColumns.length > 0 ? (
              <p className="mt-3 text-xs text-emerald-900/80 dark:text-emerald-200/80">
                Audit-ready, but still missing recommended basis columns:{" "}
                {summarizeMissing(completeness.missingRecommendedColumns, columnLabelMap)}
              </p>
            ) : (
              <p className="mt-3 text-xs text-emerald-900/80 dark:text-emerald-200/80">
                This view includes the full recommended audit/export basis set for monthly SAH and
                chargeability checks.
              </p>
            )}
          </div>
        ) : null}
        <div className="text-sm font-medium text-emerald-950 dark:text-emerald-100">
          Recommended transparency columns
        </div>
        <div className="mt-2 flex flex-wrap gap-2">
          {recommendedColumns.map((column) => (
            <button
              key={column}
              type="button"
              onClick={() => onToggleColumn(column)}
              className={clsx(
                "rounded-full border px-3 py-1 text-xs font-medium transition",
                selectedColumns.has(column)
                  ? "border-emerald-500 bg-emerald-500 text-white"
                  : "border-emerald-200 bg-white text-emerald-900 hover:border-emerald-400 dark:border-emerald-900 dark:bg-slate-950 dark:text-emerald-200 dark:hover:border-emerald-700",
              )}
            >
              {columnLabelMap.get(column) ?? column}
            </button>
          ))}
        </div>
        <p className="mt-3 text-xs text-emerald-900/75 dark:text-emerald-200/75">
          Formula reference: base available hours - holiday deduction - absence deduction = monthly
          SAH. Chargeability uses booked hours divided by monthly SAH.
        </p>
        <p className="mt-2 text-xs text-emerald-900/75 dark:text-emerald-200/75">
          Export recommendation: include both basis columns and computed metrics in the CSV. That
          keeps Excel as a review layer instead of rebuilding CapaKraken logic outside the product.
        </p>
        <p className="mt-2 text-xs text-emerald-900/75 dark:text-emerald-200/75">
          Minimum audit set: month, location context, SAH, holiday deductions, absence deductions,
          target hours, booked hours and unassigned hours.
        </p>
      </div>
    </div>
  );
}