using Microsoft.Extensions.Logging.Abstractions;
using PlotLine.Services;
using PlotLine.ViewModels;

internal static class EntityMergeTests
{
    public static void ConfirmationAndDistinctRecordsAreRequired()
    {
        // Null dependencies make any repository access before validation fail this test.
        var locations = new LocationService(null!, null!, null!, null!, NullLogger<LocationService>.Instance);
        var assets = new AssetService(null!, null!, null!, null!, null!, null!);
        foreach (var merge in new Func<EntityMergeForm, Task>[]
        {
            async form => { await locations.MergeAsync(form); },
            async form => { await assets.MergeAsync(form); }
        })
        {
            Reject(merge, new EntityMergeForm { SourceID = 1, TargetID = 2 }, "Confirm");
            Reject(merge, new EntityMergeForm { SourceID = 1, TargetID = 1, Confirm = true }, "different");
            Reject(merge, new EntityMergeForm { SourceID = 1, TargetID = 0, Confirm = true }, "different");
            Reject(merge, new EntityMergeForm { SourceID = 0, TargetID = 2, Confirm = true }, "different");
        }
    }

    private static void Reject(Func<EntityMergeForm, Task> merge, EntityMergeForm form, string message)
    {
        try { merge(form).GetAwaiter().GetResult(); }
        catch (InvalidOperationException ex) when (ex.Message.Contains(message, StringComparison.Ordinal)) { return; }
        throw new Exception("Invalid merge was not rejected before database access.");
    }
}