import type footerMessages from "../../../../messages/en/create/footer.json";
import {
  buildFinalReviewCategoryRowsDetailed,
  type FinalReviewCategoryNames,
} from "../../../../lib/create/buildFinalReviewCategories";
import type { TemplateFacetGroupKey } from "../../../../lib/create/templateReviewMapping";
import type { CreateFlowState, CreateFlowStep } from "../types";

type FooterMessages = typeof footerMessages;

/**
 * Per-step label override for the default "next-step" primary footer
 * button (the catch-all branch in `CreateFlowLayoutClient`'s footer that
 * fires `goToNextStep` for steps without a bespoke footer). Steps absent
 * from this map fall back to `footer.next`.
 *
 * `final-review` uses Continue (gated by {@link isFinalReviewContinueBlocked}).
 * `edit-rule` is handled separately by the caller because its label also
 * depends on the in-flight publish flag (`publishButtonPublishing` vs
 * `publishCommunityRule`).
 */
const DEFAULT_FOOTER_LABEL_BY_STEP: ReadonlyMap<
  CreateFlowStep,
  keyof FooterMessages
> = new Map<CreateFlowStep, keyof FooterMessages>([
  ["confirm-stakeholders", "confirmStakeholders"],
  ["community-context", "confirmDescription"],
  ["community-structure", "confirmDetails"],
  ["community-size", "confirmSize"],
]);

function hasNonEmptyId(ids: readonly string[] | undefined): boolean {
  return (ids ?? []).some((id) => id.length > 0);
}

export function isCommunityNameStepBlocked(
  step: CreateFlowStep | null | undefined,
  title: string | undefined,
): boolean {
  if (step !== "community-name") return false;
  return typeof title !== "string" || title.trim().length === 0;
}

export function isCommunityStructureStepBlocked(
  step: CreateFlowStep | null | undefined,
  selectedOrganizationTypeIds: readonly string[] | undefined,
  selectedMaturityIds: readonly string[] | undefined,
): boolean {
  if (step !== "community-structure") return false;
  const mainKind = (selectedOrganizationTypeIds ?? []).find((id) => id.length > 0);
  return !mainKind || !hasNonEmptyId(selectedMaturityIds);
}

export function isCommunitySizeStepBlocked(
  step: CreateFlowStep | null | undefined,
  selectedCommunitySizeIds: readonly string[] | undefined,
): boolean {
  if (step !== "community-size") return false;
  return !hasNonEmptyId(selectedCommunitySizeIds);
}

const FINAL_REVIEW_BLOCK_NAMES: FinalReviewCategoryNames = {
  values: "values",
  communication: "communication",
  membership: "membership",
  decisions: "decisions",
  conflict: "conflict",
};

const FINAL_REVIEW_REQUIRED_GROUPS: readonly TemplateFacetGroupKey[] = [
  "communication",
  "membership",
  "decisionApproaches",
  "conflictManagement",
] as const;

/**
 * Continue on final review waits for a community name and at least one card
 * on each of the four questions. Skipped values do not block.
 */
export function isFinalReviewContinueBlocked(state: CreateFlowState): boolean {
  const title = typeof state.title === "string" ? state.title.trim() : "";
  if (title.length === 0) return true;
  const rows = buildFinalReviewCategoryRowsDetailed(
    state,
    FINAL_REVIEW_BLOCK_NAMES,
  );
  return FINAL_REVIEW_REQUIRED_GROUPS.some((groupKey) => {
    const row = rows.find((candidate) => candidate.groupKey === groupKey);
    return !row || row.entries.length === 0;
  });
}

/**
 * Resolve the localized label for the default "next-step" footer button.
 * Returns the per-step override when one is registered, otherwise
 * `footer.next`. Caller still owns the `final-review` / `edit-rule` special case.
 */
export function getDefaultFooterLabel(
  step: CreateFlowStep | null | undefined,
  footer: FooterMessages,
): string {
  if (step == null) return footer.next;
  const key = DEFAULT_FOOTER_LABEL_BY_STEP.get(step);
  return key != null ? footer[key] : footer.next;
}