const prettyPrintTypes = (types) => {
    const addArticle = (str) => {
        const vowels = ["a", "e", "i", "o", "u"];
        if (vowels.includes(str[0])) {
            return `an ${str}`;
        }
        return `a ${str}`;
    };
    return types.map(addArticle).join(" or ");
};
const isArrayOfNotation = function (typeDefinition) {
    return typeDefinition.includes('array of ');
};
const extractTypeFromArrayOfNotation = function (typeDefinition) {
    // The notation is e.g. 'array of string'
    return typeDefinition.split(' of ')[1];
};
const isValidTypeDefinition = (typeStr) => {
    if (isArrayOfNotation(typeStr)) {
        return isValidTypeDefinition(extractTypeFromArrayOfNotation(typeStr));
    }
    return [
        "string",
        "number",
        "boolean",
        "array",
        "object",
        "buffer",
        "null",
        "undefined",
        "function",
    ].some((validType) => validType === typeStr);
};
const detectType = function (value) {
    if (value === null) {
        return 'null';
    }
    if (Array.isArray(value)) {
        return 'array';
    }
    if (Buffer.isBuffer(value)) {
        return 'buffer';
    }
    return typeof value;
};
const onlyUniqueValuesInArrayFilter = function (value, index, self) {
    return self.indexOf(value) === index;
};
const detectTypeDeep = (value) => {
    let type = detectType(value);
    let typesInArray;
    if (type === "array") {
        typesInArray = value
            .map((element) => {
            return detectType(element);
        })
            .filter(onlyUniqueValuesInArrayFilter);
        type += ` of ${typesInArray.join(", ")}`;
    }
    return type;
};
const validateArray = (argumentValue, typeToCheck) => {
    const allowedTypeInArray = extractTypeFromArrayOfNotation(typeToCheck);
    if (detectType(argumentValue) !== "array") {
        return false;
    }
    return argumentValue.every((element) => detectType(element) === allowedTypeInArray);
};
export const validateArgument = (methodName, argumentName, argumentValue, argumentMustBe) => {
    const isOneOfAllowedTypes = argumentMustBe.some((type) => {
        if (!isValidTypeDefinition(type)) {
            throw new Error(`Unknown type "${type}"`);
        }
        if (isArrayOfNotation(type)) {
            return validateArray(argumentValue, type);
        }
        return type === detectType(argumentValue);
    });
    if (!isOneOfAllowedTypes) {
        throw new Error(`Argument "${argumentName}" passed to ${methodName} must be ${prettyPrintTypes(argumentMustBe)}. Received ${detectTypeDeep(argumentValue)}`);
    }
};
export const validateOptions = (methodName, optionsObjName, obj, allowedOptions) => {
    if (obj !== undefined) {
        validateArgument(methodName, optionsObjName, obj, ["object"]);
        Object.keys(obj).forEach((key) => {
            const argName = `${optionsObjName}.${key}`;
            if (allowedOptions[key] !== undefined) {
                validateArgument(methodName, argName, obj[key], allowedOptions[key]);
            }
            else {
                throw new Error(`Unknown argument "${argName}" passed to ${methodName}`);
            }
        });
    }
};
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