using EFCore.BulkExtensions;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging.Abstractions;
using Moq;
using Npgsql;
using NUnit.Framework;
using Strata.CoreLib.Claims;
using Strata.RxNorm.Biz.DbContexts;
using Strata.RxNorm.Biz.Notification;
using Strata.RxNorm.Biz.Pharmacy;
using Strata.RxNorm.Biz.RxNorm;
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Claims;
using System.Threading;
using System.Threading.Tasks;

namespace Strata.RxNorm.Biz.Test.Unit.RxNorm;

[TestFixture]
internal class RxNormServiceTests
{
    private RxNormDbContext _dbContext;

    [SetUp]
    public void Setup()
    {
        var builder = new NpgsqlConnectionStringBuilder()
        {
            Database = "rxnorm",
            Host = "localhost",
            Port = 5555,
            Username = "postgres",
            Password = "postgres",
            WriteBufferSize = 1024 * 1024 * 16
        };

        var options = new DbContextOptionsBuilder<RxNormDbContext>()
            .UseNpgsql(builder.ToString())
            .UseSnakeCaseNamingConvention()
            .Options;

        _dbContext = new RxNormDbContext(options);
    }

    [Explicit("Make sure local database is up before running tests")]
    [TestCase("RXNSAT1A.RRF", TypeArgs = [typeof(RxnAttribute)], TestName = "RxnAttribute Small 50MB")]
    [TestCase("RXNSAT.RRF", TypeArgs = [typeof(RxnAttribute)], TestName = "RxnAttribute Big 250MB")]
    [TestCase("RXNCONSO.RRF", TypeArgs = [typeof(RxnConcept)], TestName = "RxnConcept 30MB")]
    [TestCase("RXNREL1A.RRF", TypeArgs = [typeof(RxnRelation)], TestName = "RxnRelation 50MB")]
    public async Task SeedTableTests<TEntity>(string fileName) where TEntity : class
    {
        var pharmacyUpdateService = Mock.Of<IPharmacyUpdateService>();
        Mock.Get(pharmacyUpdateService)
            .Setup(p => p.RunPharmacyUpdateClientJob(It.IsAny<bool>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync("Success");
        var rxNormService = new RxNormService(_dbContext, pharmacyUpdateService, NullLogger<RxNormService>.Instance, Mock.Of<IHubContext<NotificationHub, INotificationHub>>(), new StubClaimsPrincipalAccessor(username: "user"));

        const string testFileDirectory = "../../../Rrf_Files";
        var fullFilePath = Path.Combine(testFileDirectory, fileName);
        await using var fileStream = File.OpenRead(fullFilePath);

        var fileSizeInMb = Math.Round(fileStream.Length / 1024.0 / 1024.0, 1);
        TestContext.WriteLine($"{fileName} is {fileSizeInMb} MB");

        await _dbContext.TruncateAsync<TEntity>(cancellationToken: TestContext.CurrentContext.CancellationToken);
        var rowCount = await _dbContext.Set<TEntity>().CountAsync(TestContext.CurrentContext.CancellationToken);
        // make sure we start with clean slate
        Assert.That(rowCount, Is.Zero);

        await rxNormService.SeedTable<TEntity>(fileStream, TestContext.CurrentContext.CancellationToken);

        // assert that SOME rows were added
        rowCount = await _dbContext.Set<TEntity>().CountAsync(TestContext.CurrentContext.CancellationToken);
        Assert.That(rowCount, Is.GreaterThan(0));
    }
}

public class StubClaimsPrincipalAccessor : IClaimsPrincipalAccessor
{
    private readonly ClaimsPrincipal _principal;

    /// <summary>
    /// Will always return the given <see cref="ClaimsPrincipal"/>
    /// </summary>
    public StubClaimsPrincipalAccessor(ClaimsPrincipal principal)
    {
        _principal = principal;
    }

    /// <summary>
    /// Creates a <see cref="ClaimsPrincipal"/> with the given strata specific claims values
    /// and will always return that principal
    /// </summary>
    public StubClaimsPrincipalAccessor(
        Guid? databaseGuid = null,
        int? strataId = null,
        string username = null,
        Guid? userGuid = null,
        IEnumerable<KeyValuePair<string, string>> additionalClaims = null)
    {
        var claims = new List<Claim>();
        if (databaseGuid.HasValue)
        {
            claims.Add(new Claim(StrataClaims.DatabaseGuid, databaseGuid.ToString()));
        }

        if (strataId.HasValue)
        {
            claims.Add(new Claim(StrataClaims.StrataId, strataId.ToString()));
        }

        if (!string.IsNullOrWhiteSpace(username))
        {
            claims.Add(new Claim(StrataClaims.Username, username));
        }

        if (userGuid.HasValue)
        {
            claims.Add(new Claim(StrataClaims.UserGuid, userGuid.ToString()));
        }

        if (additionalClaims != null)
        {
            foreach (var (key, value) in additionalClaims)
            {
                claims.Add(new Claim(key, value));
            }
        }

        var claimsIdentity = new ClaimsIdentity(claims, "IntegrationTest");
        _principal = new ClaimsPrincipal(claimsIdentity);
    }

    public ClaimsPrincipal GetCurrentClaimsPrincipal()
    {
        return _principal;
    }
}