import type {
  ToolcraftControlSectionModuleContribution,
  ToolcraftPanelActionModuleContribution,
  ToolcraftProductModuleContribution,
} from "../contract/contribution";
import type { ToolcraftProductModuleDefinition } from "../contract/module-definition";

export function permutations<T>(
  values: readonly T[],
): readonly (readonly T[])[] {
  if (values.length <= 1) {
    return [[...values]];
  }

  return values.flatMap((value, index) =>
    permutations([...values.slice(0, index), ...values.slice(index + 1)]).map(
      (tail) => [value, ...tail],
    ),
  );
}

export function getSettingsContribution(
  definition: ToolcraftProductModuleDefinition,
  id: "image-export.settings",
): Extract<
  ToolcraftControlSectionModuleContribution,
  Readonly<{ id: "image-export.settings" }>
>;
export function getSettingsContribution(
  definition: ToolcraftProductModuleDefinition,
  id: "video-export.settings",
): Extract<
  ToolcraftControlSectionModuleContribution,
  Readonly<{ id: "video-export.settings" }>
>;
export function getSettingsContribution(
  definition: ToolcraftProductModuleDefinition,
  id: ToolcraftControlSectionModuleContribution["id"],
): ToolcraftControlSectionModuleContribution {
  const contribution = definition.contributions.find(
    (candidate) => candidate.kind === "control-section" && candidate.id === id,
  );
  if (contribution?.kind !== "control-section") {
    throw new Error(`Missing test contribution ${id}.`);
  }
  return contribution;
}

export function getActionContribution(
  definition: ToolcraftProductModuleDefinition,
  id: ToolcraftPanelActionModuleContribution["id"],
): ToolcraftPanelActionModuleContribution {
  const contribution = definition.contributions.find(
    (candidate) => candidate.kind === "panel-action" && candidate.id === id,
  );
  if (contribution?.kind !== "panel-action") {
    throw new Error(`Missing test contribution ${id}.`);
  }
  return contribution;
}

export function getTestModuleContributions(
  definitions: readonly ToolcraftProductModuleDefinition[],
): readonly ToolcraftProductModuleContribution[] {
  return definitions.flatMap((definition) => definition.contributions);
}