namespace SharepointToolbox.Core.Helpers;

/// <summary>
/// Risk tier of a SharePoint sharing link, used to color-code the link-type badge
/// in HTML reports.
/// </summary>
public enum SharingLinkRisk
{
    Low,     // Read-only, scoped (Org view, Direct, Existing, Review)
    Medium,  // Org-wide edit
    High,    // Anonymous (anyone with link, no auth)
    Unknown  // Unrecognized type — neutral styling
}

/// <summary>
/// Maps the raw <c>linkType</c> segment of a <c>SharingLinks.{itemId}.{type}.{shareId}</c>
/// group name to a human-readable label and a risk tier. The raw codes are SharePoint
/// internals (OrganizationEdit / AnonymousView / Flexible / …); reports show the friendly
/// label and tint the badge by tier.
/// </summary>
public static class SharingLinkLabels
{
    /// <summary>
    /// Returns the friendly label and risk tier for a sharing-link type code.
    /// Unknown codes fall through with the raw value and <see cref="SharingLinkRisk.Unknown"/>.
    /// </summary>
    public static (string Label, SharingLinkRisk Risk) Describe(string? rawLinkType)
    {
        if (string.IsNullOrWhiteSpace(rawLinkType))
            return (string.Empty, SharingLinkRisk.Unknown);

        return rawLinkType.Trim() switch
        {
            "OrganizationView"  => ("Org link · View",       SharingLinkRisk.Low),
            "OrganizationEdit"  => ("Org link · Edit",       SharingLinkRisk.Medium),
            "AnonymousView"     => ("Anyone · View",         SharingLinkRisk.High),
            "AnonymousEdit"     => ("Anyone · Edit",         SharingLinkRisk.High),
            "Flexible"          => ("Custom link",           SharingLinkRisk.Medium),
            "Direct"            => ("Specific people",       SharingLinkRisk.Low),
            "Existing"          => ("Existing access",       SharingLinkRisk.Low),
            "Review"            => ("Review only",           SharingLinkRisk.Low),
            "Embed"             => ("Embedded link",         SharingLinkRisk.Medium),
            _                   => (rawLinkType,             SharingLinkRisk.Unknown)
        };
    }

    /// <summary>
    /// Returns inline-CSS colors (background, foreground) for a risk tier — matches the
    /// risk-card palette used elsewhere in the HTML reports.
    /// </summary>
    public static (string Background, string Foreground) Colors(SharingLinkRisk risk) => risk switch
    {
        SharingLinkRisk.Low     => ("#D1FAE5", "#065F46"),
        SharingLinkRisk.Medium  => ("#FEF3C7", "#92400E"),
        SharingLinkRisk.High    => ("#FEE2E2", "#991B1B"),
        _                       => ("#F3F4F6", "#374151"),
    };
}