export type PollCreationParamKind = "string" | "stringArray" | "number" | "boolean";

export type PollCreationParamDef = {
  kind: PollCreationParamKind;
  telegramOnly?: boolean;
};

export const POLL_CREATION_PARAM_DEFS: Record<string, PollCreationParamDef> = {
  pollQuestion: { kind: "string" },
  pollOption: { kind: "stringArray" },
  pollDurationHours: { kind: "number" },
  pollMulti: { kind: "boolean" },
  pollDurationSeconds: { kind: "number", telegramOnly: true },
  pollAnonymous: { kind: "boolean", telegramOnly: true },
  pollPublic: { kind: "boolean", telegramOnly: true },
};

export type PollCreationParamName = keyof typeof POLL_CREATION_PARAM_DEFS;

export const POLL_CREATION_PARAM_NAMES = Object.keys(POLL_CREATION_PARAM_DEFS);

function toSnakeCaseKey(key: string): string {
  return key
    .replace(/([A-Z]+)([A-Z][a-z])/g, "$1_$2")
    .replace(/([a-z0-9])([A-Z])/g, "$1_$2")
    .toLowerCase();
}

function readPollParamRaw(params: Record<string, unknown>, key: string): unknown {
  if (Object.hasOwn(params, key)) {
    return params[key];
  }
  const snakeKey = toSnakeCaseKey(key);
  if (snakeKey !== key && Object.hasOwn(params, snakeKey)) {
    return params[snakeKey];
  }
  return undefined;
}

export function resolveTelegramPollVisibility(params: {
  pollAnonymous?: boolean;
  pollPublic?: boolean;
}): boolean | undefined {
  if (params.pollAnonymous && params.pollPublic) {
    throw new Error("pollAnonymous and pollPublic are mutually exclusive");
  }
  return params.pollAnonymous ? true : params.pollPublic ? false : undefined;
}

export function hasPollCreationParams(params: Record<string, unknown>): boolean {
  for (const key of POLL_CREATION_PARAM_NAMES) {
    const def = POLL_CREATION_PARAM_DEFS[key];
    const value = readPollParamRaw(params, key);
    if (def.kind === "string" && typeof value === "string" && value.trim().length > 0) {
      return true;
    }
    if (def.kind === "stringArray") {
      if (
        Array.isArray(value) &&
        value.some((entry) => typeof entry === "string" && entry.trim())
      ) {
        return true;
      }
      if (typeof value === "string" && value.trim().length > 0) {
        return true;
      }
    }
    if (def.kind === "number") {
      if (typeof value === "number" && Number.isFinite(value)) {
        return true;
      }
      if (typeof value === "string") {
        const trimmed = value.trim();
        if (trimmed.length > 0 && Number.isFinite(Number(trimmed))) {
          return true;
        }
      }
    }
    if (def.kind === "boolean") {
      if (value === true) {
        return true;
      }
      if (typeof value === "string" && value.trim().toLowerCase() === "true") {
        return true;
      }
    }
  }
  return false;
}