using FreeTubeSync.Database;
using FreeTubeSync.Model.Database;
using FreeTubeSync.Model.Json;

namespace FreeTubeSync.EndPoints;

public static class ProfileEndpoint
{
    public static void MapProfileEndpoints(this WebApplication app)
    {
        var group = app.MapGroup("profile");

        group.MapGet("/", async (IRepository<Profile> repository, CancellationToken ct) =>
        {
            var results = (await repository.GetAllAsync(ct)).ToList();
            var jsonResults = new List<ProfileJson>();
            results.MapTo(jsonResults);
            for (var i = 0; i < jsonResults.Count; i++)
                results[i].subscriptions.MapTo(jsonResults[i].subscriptions);
            return Results.Ok(results);
        });

        group.MapPost("/", async (IRepository<Profile> repository, IRepository<Subscription> subRepo, CancellationToken ct, ProfileJson profileJson) =>
        {
            var res = await repository.GetByIdAsync(profileJson._id, ct);
            if (res == null)
            {
                res = new Profile();
                res.MapFrom(profileJson);
                foreach (var subscription in profileJson.subscriptions)
                {
                    var sub = await subRepo.GetByIdAsync(subscription.id, ct);
                    if (sub == null)
                    {
                        sub = new Subscription();
                        sub.MapFrom(subscription);
                        await subRepo.AddAsync(sub, ct, false);
                    }

                    res.subscriptions.Add(sub);
                }
                await repository.AddAsync(res, ct);
            }
            else
            {
                res.MapFrom(profileJson);
                var notFound = new List<Subscription>();
                foreach (var subscription in res.subscriptions)
                {
                    var f = profileJson.subscriptions.FirstOrDefault(s => s.id == subscription.id);
                    if (f == null)
                        notFound.Add(subscription);
                    else
                        subscription.MapFrom(f);
                }
                var newSubs = (from subscription in profileJson.subscriptions let f = res.subscriptions.FirstOrDefault(s => s.id == subscription.id) where f == null select subscription).ToList();

                foreach (var newSub in newSubs)
                {
                    var sres = await subRepo.GetByIdAsync(newSub.id, ct);
                    if (sres == null)
                    {
                        sres = new Subscription();
                        sres.MapFrom(newSub);
                        await subRepo.AddAsync(sres, ct, false);
                    }

                    res.subscriptions.Add(sres);
                }

                foreach (var nfSub in notFound)
                {
                    res.subscriptions.Remove(nfSub);
                }
                
                await repository.UpdateAsync(res, ct);
            }

            return Results.Ok();
        });

        group.MapDelete("/{id}", async (IRepository<Profile> repository, CancellationToken ct, string id) =>
        {
            var result = await repository.GetByIdAsync(id, ct);
            if (result == null) return Results.NotFound();
            await repository.DeleteAsync(result, ct);
            return Results.Ok();
        });
    }
}