using SharepointToolbox.Core.Models;
using SharepointToolbox.Services.Export;

namespace SharepointToolbox.Tests.Services.Export;

/// <summary>
/// Tests for PERM-06: HTML export output.
/// These tests reference HtmlExportService which will be implemented in Plan 03.
/// Until Plan 03 runs they will fail to compile — that is expected.
/// </summary>
public class HtmlExportServiceTests
{
    private static PermissionEntry MakeEntry(
        string users, string userLogins,
        string url = "https://contoso.sharepoint.com/sites/A") =>
        new("Web", "Site A", url, true, users, userLogins, "Read", "Direct Permissions", "User");

    private static ReportBranding MakeBranding(bool msp = true, bool client = false)
    {
        var mspLogo    = msp    ? new LogoData { Base64 = "bXNw", MimeType = "image/png" }  : null;
        var clientLogo = client ? new LogoData { Base64 = "Y2xpZW50", MimeType = "image/jpeg" } : null;
        return new ReportBranding(mspLogo, clientLogo);
    }

    [Fact]
    public void BuildHtml_WithKnownEntries_ContainsUserNames()
    {
        var entry = MakeEntry("Bob Smith", "bob@contoso.com");
        var svc = new HtmlExportService();
        var html = svc.BuildHtml(new[] { entry });

        Assert.Contains("Bob Smith", html);
    }

    [Fact]
    public void BuildHtml_WithEmptyList_ReturnsValidHtml()
    {
        var svc = new HtmlExportService();
        var html = svc.BuildHtml(Array.Empty<PermissionEntry>());

        // Must be non-empty well-formed HTML even with no data rows
        Assert.NotEmpty(html);
        Assert.Contains("<html", html, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void BuildHtml_WithExternalUser_ContainsExtHashMarker()
    {
        // External users have #EXT# in their login — HTML output should make them distinguishable
        var entry = MakeEntry(
            users: "Ext User",
            userLogins: "ext_user_domain.com#EXT#@contoso.onmicrosoft.com");

        var svc = new HtmlExportService();
        var html = svc.BuildHtml(new[] { entry });

        // The HTML should surface the external marker so admins can identify guests
        Assert.Contains("EXT", html, StringComparison.OrdinalIgnoreCase);
    }

    // ── Branding tests ────────────────────────────────────────────────────────

    [Fact]
    public void BuildHtml_WithMspBranding_ContainsMspLogoImg()
    {
        var entry = MakeEntry("Test", "test@contoso.com");
        var svc = new HtmlExportService();
        var html = svc.BuildHtml(new[] { entry }, MakeBranding(msp: true, client: false));
        Assert.Contains("data:image/png;base64,bXNw", html);
    }

    [Fact]
    public void BuildHtml_WithNullBranding_ContainsNoLogoImg()
    {
        var entry = MakeEntry("Test", "test@contoso.com");
        var svc = new HtmlExportService();
        var html = svc.BuildHtml(new[] { entry });
        Assert.DoesNotContain("data:image/png;base64,", html);
    }

    [Fact]
    public void BuildHtml_WithBothLogos_ContainsTwoImgs()
    {
        var entry = MakeEntry("Test", "test@contoso.com");
        var svc = new HtmlExportService();
        var html = svc.BuildHtml(new[] { entry }, MakeBranding(msp: true, client: true));
        Assert.Contains("data:image/png;base64,bXNw", html);
        Assert.Contains("data:image/jpeg;base64,Y2xpZW50", html);
    }
}