using Microsoft.Extensions.DependencyInjection;
using Shouldly;
using Tnsu.ApprovalRoute.Application.RequestTypes;
using Tnsu.ApprovalRoute.Application.TemplateRoutes;
using Tnsu.ApprovalRoute.Domain.Enums;
using Tnsu.ApprovalRoute.IntegrationTests.Infrastructure;

namespace Tnsu.ApprovalRoute.IntegrationTests.ApplicationServices;

[CollectionDefinition(Name)]
public sealed class TemplateRouteServiceCollection : ICollectionFixture<PostgresDatabaseFixture>
{
    public const string Name = nameof(TemplateRouteServiceCollection);
}

[Collection(TemplateRouteServiceCollection.Name)]
public sealed class TemplateRouteServiceTests : IDisposable
{
    private static readonly Guid CompanyId = Guid.Parse("00000000-0000-0000-0000-000000000002");
    private static readonly Guid DepartmentId = Guid.Parse("00000000-0000-0000-0000-000000000001");

    private readonly ServiceProvider _services;
    private readonly TemplateRouteService _service;
    private readonly RequestTypeService _requestTypeService;

    public TemplateRouteServiceTests(PostgresDatabaseFixture fixture)
    {
        _services = TestServiceProviderFactory.Build(fixture.ConnectionString);
        _service = _services.GetRequiredService<TemplateRouteService>();
        _requestTypeService = _services.GetRequiredService<RequestTypeService>();
    }

    public void Dispose() => _services.Dispose();

    private async Task<Guid> CreateRequestTypeAsync(string name) =>
        (await _requestTypeService.CreateAsync(new CreateRequestTypeRequest(name, $"/{name}"), CancellationToken.None)).Value.Id;

    [Fact]
    public async Task CreateAsync_ThenGetAsync_ReturnsCreatedEntity()
    {
        var requestTypeId = await CreateRequestTypeAsync("Vacation");

        var created = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: true),
            CancellationToken.None);

        created.IsSuccess.ShouldBeTrue();
        created.Value.RequestTypeId.ShouldBe(requestTypeId);

        var fetched = await _service.GetAsync(created.Value.Id, CancellationToken.None);
        fetched.IsSuccess.ShouldBeTrue();
        fetched.Value.CompanyId.ShouldBe(CompanyId);
    }

    [Fact]
    public async Task CreateAsync_UnknownRequestType_ReturnsFailedResult()
    {
        var result = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, Guid.NewGuid(), DepartmentId, CompanyId, ByProject: false, RequiresControl: false),
            CancellationToken.None);

        result.IsFailed.ShouldBeTrue();
    }

    [Fact]
    public async Task CreateAsync_DuplicateRoute_ReturnsFailedResult()
    {
        var requestTypeId = await CreateRequestTypeAsync("Business trip");
        var request = new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: false);

        var first = await _service.CreateAsync(request, CancellationToken.None);
        first.IsSuccess.ShouldBeTrue();

        var duplicate = await _service.CreateAsync(request, CancellationToken.None);
        duplicate.IsFailed.ShouldBeTrue();
    }

    [Fact]
    public async Task UpdateAsync_ChangesFields()
    {
        var requestTypeId = await CreateRequestTypeAsync("Sick leave");
        var created = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: false),
            CancellationToken.None);

        var updated = await _service.UpdateAsync(
            created.Value.Id,
            new UpdateTemplateRouteRequest(RouteType.Parallel, DepartmentId, CompanyId, ByProject: false, RequiresControl: true),
            CancellationToken.None);

        updated.IsSuccess.ShouldBeTrue();
        updated.Value.RouteType.ShouldBe(RouteType.Parallel);
        updated.Value.RequiresControl.ShouldBeTrue();
    }

    [Fact]
    public async Task DeleteAsync_RemovesEntity()
    {
        var requestTypeId = await CreateRequestTypeAsync("Remote work");
        var created = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: false),
            CancellationToken.None);

        var deleted = await _service.DeleteAsync(created.Value.Id, CancellationToken.None);
        deleted.IsSuccess.ShouldBeTrue();

        var fetched = await _service.GetAsync(created.Value.Id, CancellationToken.None);
        fetched.IsFailed.ShouldBeTrue();
    }

    [Fact]
    public async Task ResolveAsync_ExactDepartmentMatch_ReturnsMatchingStepsForStatus()
    {
        var requestTypeId = await CreateRequestTypeAsync("Exact match request");
        var route = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId, CompanyId, ByProject: false, RequiresControl: true),
            CancellationToken.None);

        var stepService = _services.GetRequiredService<Application.TemplateRouteSteps.TemplateRouteStepService>();
        await stepService.CreateAsync(
            route.Value.Id,
            new Application.TemplateRouteSteps.CreateTemplateRouteStepRequest(
                1, "approver@tnsu.kz", "Lead", ProjectRole.None, HeadType.Chief, RouteStepStatus.Approval, false),
            CancellationToken.None);

        var resolved = await _service.ResolveAsync(
            new ResolveTemplateRouteRequest(requestTypeId, "someone@tnsu.kz", null, RouteStepStatus.Approval),
            CancellationToken.None);

        resolved.IsSuccess.ShouldBeTrue();
        resolved.Value.RouteId.ShouldBe(route.Value.Id);
        resolved.Value.Steps.ShouldHaveSingleItem();
        resolved.Value.Steps[0].ExecutorEmail.ShouldBe("approver@tnsu.kz");
    }

    [Fact]
    public async Task ResolveAsync_NoDepartmentRoute_FallsBackToCompanyWideRoute()
    {
        var requestTypeId = await CreateRequestTypeAsync("Company-wide request");
        var route = await _service.CreateAsync(
            new CreateTemplateRouteRequest(RouteType.Sequential, requestTypeId, DepartmentId: null, CompanyId, ByProject: false, RequiresControl: false),
            CancellationToken.None);

        var resolved = await _service.ResolveAsync(
            new ResolveTemplateRouteRequest(requestTypeId, "someone@tnsu.kz", null, RouteStepStatus.Execution),
            CancellationToken.None);

        resolved.IsSuccess.ShouldBeTrue();
        resolved.Value.RouteId.ShouldBe(route.Value.Id);
    }

    [Fact]
    public async Task ResolveAsync_UnknownRequestType_ReturnsFailedResult()
    {
        var resolved = await _service.ResolveAsync(
            new ResolveTemplateRouteRequest(Guid.NewGuid(), "someone@tnsu.kz", null, RouteStepStatus.Approval),
            CancellationToken.None);

        resolved.IsFailed.ShouldBeTrue();
    }
}