namespace Lagerbestand.Models;

/// <summary>
/// Represents the storage area type for tire storage locations.
/// The value corresponds to position A in the location code (ABCD format).
/// </summary>
public enum AreaType
{
    /// <summary>
    /// Werkstatt (Gebäude 1, 3 Regalreihen) - Code prefix: 1
    /// </summary>
    Werkstatt = 1,

    /// <summary>
    /// Lager (Gebäude 2, 5 Regalreihen) - Code prefix: 2
    /// </summary>
    Lager = 2
}

/// <summary>
/// Extension methods for AreaType enum.
/// </summary>
public static class AreaTypeExtensions
{
    /// <summary>
    /// Gets the German display name for the area type.
    /// </summary>
    public static string GetDisplayName(this AreaType areaType) => areaType switch
    {
        AreaType.Lager => "Lager",
        AreaType.Werkstatt => "Werkstatt",
        _ => areaType.ToString()
    };

    /// <summary>
    /// Gets the single-digit code for the area type.
    /// </summary>
    public static string GetCode(this AreaType areaType) => ((int)areaType).ToString();

    /// <summary>
    /// Gets the maximum shelf row number for the building.
    /// Werkstatt (Gebäude 1) has 3 rows, Lager (Gebäude 2) has 5 rows.
    /// </summary>
    public static int GetMaxRow(this AreaType areaType) => areaType switch
    {
        AreaType.Werkstatt => 3,
        AreaType.Lager => 5,
        _ => 1
    };

    /// <summary>
    /// Gets a display label including the building number (e.g., "Gebäude 1 – Werkstatt").
    /// </summary>
    public static string GetBuildingLabel(this AreaType areaType) =>
        $"Gebäude {(int)areaType} – {areaType.GetDisplayName()}";

    /// <summary>
    /// Parses a code digit to AreaType.
    /// </summary>
    /// <param name="code">Single digit code (1 or 2)</param>
    /// <returns>The corresponding AreaType</returns>
    /// <exception cref="ArgumentException">If code is not valid</exception>
    public static AreaType FromCode(char code) => code switch
    {
        '1' => AreaType.Werkstatt,
        '2' => AreaType.Lager,
        _ => throw new ArgumentException($"Ungültiger Bereichscode: {code}. Erlaubt: 1 (Werkstatt), 2 (Lager)", nameof(code))
    };

    /// <summary>
    /// Tries to parse a code digit to AreaType.
    /// </summary>
    public static bool TryFromCode(char code, out AreaType areaType)
    {
        areaType = default;
        if (code == '1')
        {
            areaType = AreaType.Werkstatt;
            return true;
        }
        if (code == '2')
        {
            areaType = AreaType.Lager;
            return true;
        }
        return false;
    }
}