namespace STCompiler.Common;

// Gemeinsame Variable types für Compiler, Disassembler und Simulator
public enum VarType {
    // Boolean
    BOOL = 1,
    // Unsigned integers
    BYTE = 2, WORD = 3, DWORD = 4, LWORD = 5,
    // Signed integers
    SINT = 6, INT = 7, DINT = 8, LINT = 9,
    // Unsigned integers (alternative names)
    USINT = 10, UINT = 11, UDINT = 12, ULINT = 13,
    // Floating point
    REAL = 14, LREAL = 15,
    // Date/time types
    TIME = 16,         // Zeitdauer -> TimeSpan
    DATE = 17,         // Datum -> DateTime
    TIME_OF_DAY = 18,  // Tageszeit (TOD) -> TimeSpan / DateTime
    TOD = TIME_OF_DAY,
    DATE_AND_TIME = 19,// Datum + Uhrzeit (DT) -> DateTime
    DT = DATE_AND_TIME,
    // Array marker - actual array types use ArrayType class
    ARRAY = 20
}

// Represents an array type in structured text
public class ArrayType {
    public VarType ElementType { get; set; }  // Type of array elements
    public int Start { get; set; }            // Start index
    public int End { get; set; }              // End index
    public int Length => End - Start + 1;     // Number of elements

    public ArrayType(VarType elementType, int start, int end) {
        ElementType = elementType;
        Start = start;
        End = end;
        if (end < start) throw new System.ArgumentException("Array end index must be greater than or equal to start index");
    }

    public override string ToString() => $"ARRAY [{Start}..{End}] OF {ElementType}";
}