const Types = {
    BOOL: 0xc1,
    SINT: 0xc2,
    INT: 0xc3,
    DINT: 0xc4,
    LINT: 0xc5,
    USINT: 0xc6,
    UINT: 0xc7,
    UDINT: 0xc8,
    REAL: 0xca,
    LREAL: 0xcb,
    STIME: 0xcc,
    DATE: 0xcd,
    TIME_AND_DAY: 0xce,
    DATE_AND_STRING: 0xcf,
    STRING: 0xd0,
    WORD: 0xd1,
    DWORD: 0xd2,
    BIT_STRING: 0xd3,
    LWORD: 0xd4,
    STRING2: 0xd5,
    FTIME: 0xd6,
    LTIME: 0xd7,
    ITIME: 0xd8,
    STRINGN: 0xd9,
    SHORT_STRING: 0xda,
    TIME: 0xdb,
    EPATH: 0xdc,
    ENGUNIT: 0xdd,
    STRINGI: 0xde,
    STRUCT: 0x02a0
};

const TypeSizes = {
    0xc1: 1,
    0xc2: 1,
    0xc3: 2,
    0xc4: 4,
    0xc5: 8,
    0xc6: 1,
    0xc7: 2,
    0xc8: 4,
    0xca: 4,
}

/**
 * Checks if an Inputted Integer is a Valid Type Code (Vol1 Appendix C)
 *
 * @param num - Integer to be Tested
 * @returns true or false
 */
const isValidTypeCode = (num: number): boolean => {
    if (!Number.isInteger(num)) return false;
    for (let type of Object.keys(Types)) {
        if (Types[type] === num) return true;
    }
    return false;
};

/**
 * Retrieves Human Readable Version of an Inputted Type Code
 *
 * @param num - Type Code to Request Human Readable version
 * @returns Type Code String Interpretation
 */
const getTypeCodeString = (num: number): string => {
    if (!Number.isInteger(num)) return null;
    for (let type of Object.keys(Types)) {
        if (Types[type] === num) return type;
    }
    return null;
};

export { Types, isValidTypeCode, getTypeCodeString, TypeSizes };