using System.Security.Claims;
using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using FluentAssertions;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Moq;
using SeaHaven.DataServices.Interfaces;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Implementation;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

public sealed class TeamMemberServiceTests
{
    [Fact]
    public async Task Create_DispatcherRequiresAtLeastOneServiceArea()
    {
        var userManager = UserManager();
        var roleManager = RoleManager();
        var service = new TeamMemberService(
            userManager.Object,
            roleManager.Object,
            Mock.Of<IUserServiceAreaDataService>(),
            Mock.Of<ITeamPermissionOverrideDataService>());

        var result = await service.CreateAsync(
            ValidRequest() with { ServiceAreas = Array.Empty<string>() },
            Admin(),
            CancellationToken.None);

        result.Success.Should().BeFalse();
        result.Error.Should().Be("At least one service area is required for a Dispatcher.");
        userManager.Verify(manager => manager.CreateAsync(It.IsAny<ApplicationUser>()), Times.Never);
    }

    [Fact]
    public async Task Create_RejectsUnknownColorAndPermission()
    {
        var service = NewService(out var userManager, out _, out _, out _);

        var badColor = await service.CreateAsync(
            ValidRequest() with { Color = "#000000" },
            Admin(),
            CancellationToken.None);
        var badPermission = await service.CreateAsync(
            ValidRequest() with
            {
                PermissionOverrides = new Dictionary<string, UserPermissionState>
                {
                    ["not-a-permission"] = UserPermissionState.Allow
                }
            },
            Admin(),
            CancellationToken.None);

        badColor.Error.Should().Be("Color must be selected from the accessible palette.");
        badPermission.Error.Should().Be("Unknown permission key: not-a-permission.");
        userManager.Verify(manager => manager.CreateAsync(It.IsAny<ApplicationUser>()), Times.Never);
    }

    [Fact]
    public async Task Create_PersistsPendingUserWithoutPasswordAndStoresAreasAndOverrides()
    {
        var service = NewService(out var userManager, out var roleManager, out var areas, out var overrides);
        ApplicationUser? created = null;
        userManager
            .Setup(manager => manager.CreateAsync(It.IsAny<ApplicationUser>()))
            .Callback<ApplicationUser>(user =>
            {
                user.Id = "new-user";
                created = user;
            })
            .ReturnsAsync(IdentityResult.Success);
        userManager
            .Setup(manager => manager.FindByEmailAsync(It.IsAny<string>()))
            .ReturnsAsync((ApplicationUser?)null);
        userManager
            .Setup(manager => manager.AddToRoleAsync(It.IsAny<ApplicationUser>(), "Dispatcher"))
            .ReturnsAsync(IdentityResult.Success);
        roleManager.Setup(manager => manager.RoleExistsAsync("Dispatcher")).ReturnsAsync(true);

        var result = await service.CreateAsync(ValidRequest(), Admin(), CancellationToken.None);

        result.Success.Should().BeTrue();
        created.Should().NotBeNull();
        created!.PasswordHash.Should().BeNull();
        created.EmailConfirmed.Should().BeFalse();
        created.PendingRegistration.Should().BeTrue();
        created.PhoneNumber.Should().Be("555-0100");
        result.Member!.ServiceAreas.Should().Equal("East", "West");
        areas.Verify(data => data.ReplaceAsync("new-user", It.Is<IReadOnlyCollection<string>>(value => value.SequenceEqual(new[] { "East", "West" })), It.IsAny<CancellationToken>()), Times.Once);
        overrides.Verify(data => data.SetOverridesAsync("new-user", It.Is<IReadOnlyDictionary<string, UserPermissionState>>(value => value["deleteSites"] == UserPermissionState.Allow), It.IsAny<CancellationToken>()), Times.Once);
    }

    private static TeamMemberService NewService(
        out Mock<UserManager<ApplicationUser>> userManager,
        out Mock<RoleManager<IdentityRole>> roleManager,
        out Mock<IUserServiceAreaDataService> areas,
        out Mock<ITeamPermissionOverrideDataService> overrides)
    {
        userManager = UserManager();
        roleManager = RoleManager();
        areas = new Mock<IUserServiceAreaDataService>();
        overrides = new Mock<ITeamPermissionOverrideDataService>();
        return new TeamMemberService(userManager.Object, roleManager.Object, areas.Object, overrides.Object);
    }

    private static Mock<UserManager<ApplicationUser>> UserManager()
    {
        var store = new Mock<IUserStore<ApplicationUser>>();
        return new Mock<UserManager<ApplicationUser>>(
            store.Object,
            Microsoft.Extensions.Options.Options.Create(new IdentityOptions()),
            Mock.Of<IPasswordHasher<ApplicationUser>>(),
            Array.Empty<IUserValidator<ApplicationUser>>(),
            Array.Empty<IPasswordValidator<ApplicationUser>>(),
            Mock.Of<ILookupNormalizer>(),
            new IdentityErrorDescriber(),
            Mock.Of<IServiceProvider>(),
            Mock.Of<ILogger<UserManager<ApplicationUser>>>());
    }

    private static Mock<RoleManager<IdentityRole>> RoleManager()
    {
        var store = new Mock<IRoleStore<IdentityRole>>();
        return new Mock<RoleManager<IdentityRole>>(
            store.Object,
            Array.Empty<IRoleValidator<IdentityRole>>(),
            Mock.Of<ILookupNormalizer>(),
            new IdentityErrorDescriber(),
            Mock.Of<ILogger<RoleManager<IdentityRole>>>());
    }

    private static CreateTeamMemberRequestDTO ValidRequest() => new()
    {
        Name = "Taylor Dispatcher",
        Role = "dispatcher",
        Color = "#F59E0B",
        Email = "taylor@example.com",
        Phone = "555-0100",
        ServiceAreas = new[] { "east", "West" },
        PermissionOverrides = new Dictionary<string, UserPermissionState>
        {
            ["deleteSites"] = UserPermissionState.Allow
        }
    };

    private static ClaimsPrincipal Admin() =>
        new(new ClaimsIdentity(new[] { new Claim(ClaimTypes.Role, "Admin") }, "test"));
}