using ERPCore.Domain.Entities;
using ERPCore.Domain.Notifications;
using ERPCore.Repositories;
using ERPCore.Services;
using ERPCore.System.Errors;
using ERPCore.Tests.TestSupport;
using Microsoft.EntityFrameworkCore;

namespace ERPCore.Tests;

public class NotificationConfigServiceTests
{
    [Fact]
    public async Task GetAsync_MergesSavedValuesWithDiscoveredModules()
    {
        var dbName = Guid.NewGuid().ToString("N");
        await using var db = NotificationConfigTestSupport.CreateContext(dbName);
        await NotificationConfigTestSupport.SeedAsync(db, new[]
        {
            new NotificationConfigModule
            {
                ModuleKey = "sale.create",
                EmailEnabled = true,
                SmsEnabled = false,
                InAppEnabled = true
            }
        });

        var service = CreateService(db);

        var result = await service.GetAsync();

        Assert.Equal(7u, result.RowVersion);
        Assert.Contains(result.Value.Modules, m => m.ModuleKey == "sale.create" && m.EmailEnabled && !m.SmsEnabled && m.InAppEnabled);
        Assert.Contains(result.Value.Modules, m => m.ModuleKey == "grn.confirmed" && !m.EmailEnabled && !m.SmsEnabled && !m.InAppEnabled);
    }

    [Fact]
    public async Task UpdateAsync_PersistsEmptyAndMultiChannelSelections()
    {
        var dbName = Guid.NewGuid().ToString("N");
        await using var db = NotificationConfigTestSupport.CreateContext(dbName);
        await NotificationConfigTestSupport.SeedAsync(db);

        var service = CreateService(db);
        var catalog = new NotificationModuleCatalog();
        var request = new ERPCore.Dtos.Notifications.UpdateNotificationConfigRequest
        {
            Modules = catalog.GetAll().Select((module, index) => new ERPCore.Dtos.Notifications.UpdateNotificationModuleRequest
            {
                ModuleKey = module.Key,
                EmailEnabled = index == 0,
                SmsEnabled = index == 1,
                InAppEnabled = index == 1
            }).ToList()
        };

        var updated = await service.UpdateAsync(request, 7);

        Assert.Equal(7u, updated.RowVersion);
        Assert.Contains(updated.Value.Modules, m => m.ModuleKey == catalog.GetAll()[0].Key && m.EmailEnabled && !m.SmsEnabled && !m.InAppEnabled);
        Assert.Contains(updated.Value.Modules, m => m.ModuleKey == catalog.GetAll()[1].Key && !m.EmailEnabled && m.SmsEnabled && m.InAppEnabled);

        await using var verifyDb = NotificationConfigTestSupport.CreateContext(dbName);
        var persisted = await verifyDb.NotificationConfigModules.AsNoTracking().ToListAsync();
        Assert.Contains(persisted, m => m.ModuleKey == catalog.GetAll()[0].Key && m.EmailEnabled && !m.SmsEnabled && !m.InAppEnabled);
        Assert.Contains(persisted, m => m.ModuleKey == catalog.GetAll()[1].Key && !m.EmailEnabled && m.SmsEnabled && m.InAppEnabled);
    }

    [Fact]
    public async Task ResolveEnabledChannelsAsync_ReturnsEmptyWhenNothingEnabled()
    {
        var dbName = Guid.NewGuid().ToString("N");
        await using var db = NotificationConfigTestSupport.CreateContext(dbName);
        await NotificationConfigTestSupport.SeedAsync(db, new[]
        {
            new NotificationConfigModule
            {
                ModuleKey = "sale.create",
                EmailEnabled = false,
                SmsEnabled = false,
                InAppEnabled = false
            }
        });

        var service = CreateService(db);

        var channels = await service.ResolveEnabledChannelsAsync("sale.create");

        Assert.Empty(channels);
    }

    [Fact]
    public async Task ResolveEnabledChannelsAsync_ReturnsMultipleChannels()
    {
        var dbName = Guid.NewGuid().ToString("N");
        await using var db = NotificationConfigTestSupport.CreateContext(dbName);
        await NotificationConfigTestSupport.SeedAsync(db, new[]
        {
            new NotificationConfigModule
            {
                ModuleKey = "sale.create",
                EmailEnabled = true,
                SmsEnabled = true,
                InAppEnabled = false
            }
        });

        var service = CreateService(db);

        var channels = await service.ResolveEnabledChannelsAsync("sale.create");

        Assert.Equal(new[] { NotificationChannel.Email, NotificationChannel.Sms }, channels);
    }

    [Fact]
    public async Task UpdateAsync_MapsConcurrencyFailuresToDomainException()
    {
        var dbName = Guid.NewGuid().ToString("N");
        await using var db = NotificationConfigTestSupport.CreateContext(dbName);
        await NotificationConfigTestSupport.SeedAsync(db);

        var service = CreateService(db, new ThrowingUnitOfWork());
        var catalog = new NotificationModuleCatalog();
        var request = new ERPCore.Dtos.Notifications.UpdateNotificationConfigRequest
        {
            Modules = catalog.GetAll().Select(module => new ERPCore.Dtos.Notifications.UpdateNotificationModuleRequest
            {
                ModuleKey = module.Key,
                EmailEnabled = false,
                SmsEnabled = false,
                InAppEnabled = false
            }).ToList()
        };

        var ex = await Assert.ThrowsAsync<DomainException>(() => service.UpdateAsync(request, 7));
        Assert.Equal(ErrorCodes.ConcurrencyConflict, ex.Code);
        Assert.Equal(412, ex.StatusCode);
    }

    private static NotificationConfigService CreateService(ERPCore.Infra.Persistence.ErpDbContext db, ERPCore.Infra.UoW.IUnitOfWork? uow = null)
    {
        var configRepo = new Repository<NotificationConfig>(db);
        var moduleRepo = new Repository<NotificationConfigModule>(db);
        return new NotificationConfigService(
            configRepo,
            moduleRepo,
            new NotificationModuleCatalog(),
            new TestCurrentUser(),
            uow ?? new ERPCore.Infra.UoW.UnitOfWork(db));
    }
}