const knownExtensionParameters = ["attachTo", "disabled", "config"];
function readAppExtensionsConfig(rootConfig) {
  const arr = rootConfig.getOptional("app.extensions");
  if (!Array.isArray(arr)) {
    if (arr === void 0) {
      return [];
    }
    rootConfig.getConfigArray("app.extensions");
    return [];
  }
  return arr.map(
    (arrayEntry, arrayIndex) => expandShorthandExtensionParameters(arrayEntry, arrayIndex)
  );
}
function expandShorthandExtensionParameters(arrayEntry, arrayIndex) {
  function errorMsg(msg, key, prop) {
    return `Invalid extension configuration at app.extensions[${arrayIndex}]${key ? `[${key}]` : ""}${prop ? `.${prop}` : ""}, ${msg}`;
  }
  function assertValidId(id2) {
    if (!id2 || id2 !== id2.trim()) {
      throw new Error(
        errorMsg("extension ID must not be empty or contain whitespace")
      );
    }
  }
  if (typeof arrayEntry === "string") {
    assertValidId(arrayEntry);
    return {
      id: arrayEntry,
      disabled: false
    };
  }
  if (typeof arrayEntry !== "object" || arrayEntry === null || Array.isArray(arrayEntry)) {
    throw new Error(errorMsg("must be a string or an object"));
  }
  const keys = Object.keys(arrayEntry);
  if (keys.length !== 1) {
    const joinedKeys = keys.length ? `'${keys.join("', '")}'` : "none";
    throw new Error(errorMsg(`must have exactly one key, got ${joinedKeys}`));
  }
  const id = String(keys[0]);
  const value = arrayEntry[id];
  assertValidId(id);
  if (value === null) {
    return {
      id,
      disabled: false
    };
  }
  if (typeof value === "boolean") {
    return {
      id,
      disabled: !value
    };
  }
  if (typeof value !== "object" || Array.isArray(value)) {
    throw new Error(errorMsg("value must be a boolean or object", id));
  }
  const attachTo = value.attachTo;
  const disabled = value.disabled;
  const config = value.config;
  if (attachTo !== void 0) {
    if (attachTo === null || typeof attachTo !== "object" || Array.isArray(attachTo)) {
      throw new Error(errorMsg("must be an object", id, "attachTo"));
    }
    if (typeof attachTo.id !== "string" || attachTo.id === "") {
      throw new Error(
        errorMsg("must be a non-empty string", id, "attachTo.id")
      );
    }
    if (typeof attachTo.input !== "string" || attachTo.input === "") {
      throw new Error(
        errorMsg("must be a non-empty string", id, "attachTo.input")
      );
    }
  }
  if (disabled !== void 0 && typeof disabled !== "boolean") {
    throw new Error(errorMsg("must be a boolean", id, "disabled"));
  }
  if (config !== void 0 && (typeof config !== "object" || config === null || Array.isArray(config))) {
    throw new Error(errorMsg("must be an object", id, "config"));
  }
  const unknownKeys = Object.keys(value).filter(
    (k) => !knownExtensionParameters.includes(k)
  );
  if (unknownKeys.length > 0) {
    throw new Error(
      errorMsg(
        `unknown parameter; expected one of '${knownExtensionParameters.join(
          "', '"
        )}'`,
        id,
        unknownKeys.join(", ")
      )
    );
  }
  return {
    id,
    attachTo,
    disabled,
    config
  };
}

export { expandShorthandExtensionParameters, readAppExtensionsConfig };
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