using System.Security.Claims;
using Api.SeaHavenIndustries.Controllers;
using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using FluentAssertions;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Moq;
using SeaHaven.DataServices.Implementation;
using SeaHaven.Services.Configuration;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Helpers;
using SeaHaven.Services.Implementation;
using SeaHaven.Services.Interfaces;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

/// <summary>
/// Revoke rules exercised end to end through both revoke endpoints (the Uplift
/// Approvals route and the work-order route) against the real services, so a
/// refusal is observed as the HTTP result and the unchanged stored state.
/// </summary>
public sealed class UpliftRevokeEndpointRulesTests
{
    private const int WorkOrderId = 1;
    private const int DispatchId = 10;
    private const int AutoApprovedId = 100;
    private const int AdminApprovedId = 101;

    public enum RevokeRoute
    {
        UpliftApprovals,
        WorkOrder,
    }

    private static ApplicationDbContext CreateContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;
        return new ApplicationDbContext(options);
    }

    private static ClaimsPrincipal OrgWideUser(string userId, string role) =>
        new(new ClaimsIdentity(
            new[]
            {
                new Claim(ClaimTypes.NameIdentifier, userId),
                new Claim(ClaimTypes.Role, role),
                new Claim(SeaHavenClaimTypes.OrgScope, SeaHavenClaimTypes.OrgScopeAll),
            },
            "test"));

    private static async Task SeedAsync(ApplicationDbContext context)
    {
        context.Accounts.Add(new Accounts { Id = 1, Name = "Acme Corp", IsDeleted = false });
        context.Users.Add(new ApplicationUser { Id = "admin-1", UserName = "admin-1", FirstName = "Ada", LastName = "Admin" });
        context.Users.Add(new ApplicationUser { Id = "dispatcher-1", UserName = "dispatcher-1", FirstName = "Dee", LastName = "Dispatcher" });
        context.Vendors.Add(new Vendor { Id = 1, CompanyName = "Acme HVAC" });
        context.Dispatches.Add(new Dispatch
        {
            Id = DispatchId,
            VendorId = 1,
            WorkOrderId = WorkOrderId,
            NTEAmount = 2200m,
            DispatchNumber = "DIS-10",
            Status = "Scheduled",
        });
        context.workOrders.Add(new WorkOrder
        {
            Id = WorkOrderId,
            InternalWONumber = "10000000001",
            PrimaryDispatchId = DispatchId,
            AccountId = 1,
            WorkOrderType = WorkOrderType.PM,
            LifecycleStatus = LifecycleStatus.Scheduled,
        });
        // The admin filed this one themselves and it auto-approved within the allowance.
        context.DispatchUpliftRequests.Add(new DispatchUpliftRequest
        {
            Id = AutoApprovedId,
            DispatchId = DispatchId,
            CurrentNTE = 1000m,
            RequestedNTE = 400m,
            Status = UpliftStatus.NoApprovalRequired,
            RequiredTier = 0,
            NotificationStatus = "Sent",
            createdby = "admin-1",
            CreatedDate = DateTime.UtcNow.AddHours(-2),
        });
        context.DispatchUpliftRequests.Add(new DispatchUpliftRequest
        {
            Id = AdminApprovedId,
            DispatchId = DispatchId,
            CurrentNTE = 1400m,
            RequestedNTE = 800m,
            Status = UpliftStatus.Approved,
            RequiredTier = 1,
            NotificationStatus = "Sent",
            createdby = "dispatcher-1",
            CreatedDate = DateTime.UtcNow.AddHours(-1),
            DecidedAt = DateTime.UtcNow.AddMinutes(-30),
            DecidedByUserId = "admin-1",
        });
        await context.SaveChangesAsync();
    }

    private static WorkOrderUpliftService NewWorkOrderUpliftService(ApplicationDbContext context) =>
        new(
            new UpliftDataService(context),
            new DispatchDataService(context),
            new WorkOrderDetailDataService(context),
            new WorkOrderAccountResolver(new AccountDataService(context), new LocationDataService(context)),
            new UserDataService(context),
            new TeamPermissionOverrideDataService(context),
            new TeamPermissionPolicy(),
            TimeProvider.System,
            Microsoft.Extensions.Options.Options.Create(new ApprovalsOptions()));

    private static async Task<IActionResult> RevokeAsync(
        ApplicationDbContext context,
        RevokeRoute route,
        ClaimsPrincipal user,
        int upliftId,
        string? reason)
    {
        var workOrderFlow = NewWorkOrderUpliftService(context);
        var httpContext = new DefaultHttpContext { User = user };

        if (route == RevokeRoute.WorkOrder)
        {
            var controller = new WorkOrderDetailController(
                Mock.Of<IWorkOrderDetailService>(),
                Mock.Of<IWorkOrderCommentService>(),
                workOrderFlow,
                Mock.Of<ILogger<WorkOrderDetailController>>())
            {
                ControllerContext = new ControllerContext { HttpContext = httpContext },
            };
            return await controller.RevokeUplift(
                WorkOrderId,
                upliftId,
                new RevokeWorkOrderUpliftRequestDto { Reason = reason },
                CancellationToken.None);
        }

        var upliftService = new UpliftService(
            new UpliftDataService(context),
            new DispatchDataService(context),
            Mock.Of<IVendorDocumentStoragePort>(),
            TimeProvider.System,
            Microsoft.Extensions.Options.Options.Create(new ApprovalsOptions()),
            workOrderFlow);
        var approvals = new UpliftController(upliftService, Mock.Of<ILogger<UpliftController>>())
        {
            ControllerContext = new ControllerContext { HttpContext = httpContext },
        };
        return await approvals.Revoke(
            upliftId,
            new UpliftController.DecisionRequest { Note = reason },
            CancellationToken.None);
    }

    private static async Task AssertUnchangedAsync(ApplicationDbContext context, int upliftId, string status)
    {
        var stored = await context.DispatchUpliftRequests.AsNoTracking().SingleAsync(u => u.Id == upliftId);
        stored.Status.Should().Be(status);
        stored.DecisionNote.Should().BeNull();
        (await context.Dispatches.AsNoTracking().SingleAsync(d => d.Id == DispatchId)).NTEAmount.Should().Be(2200m);
        (await context.WorkOrderAuditLogs.AsNoTracking().AnyAsync(a => a.Action == "uplift_revoke")).Should().BeFalse();
    }

    [Fact]
    public async Task WorkOrderRoute_AdminRevokingAutoApprovedUpliftTheyRequested_IsForbiddenAndChangesNothing()
    {
        await using var context = CreateContext();
        await SeedAsync(context);

        var result = await RevokeAsync(
            context,
            RevokeRoute.WorkOrder,
            OrgWideUser("admin-1", "Admin"),
            AutoApprovedId,
            "Wrong quote attached");

        var refused = result.Should().BeOfType<ObjectResult>().Subject;
        refused.StatusCode.Should().Be(StatusCodes.Status403Forbidden);
        refused.Value.Should().BeOfType<Response>().Which.Message
            .Should().StartWith("You are not authorized to perform this action");
        await AssertUnchangedAsync(context, AutoApprovedId, UpliftStatus.NoApprovalRequired);
    }

    [Fact]
    public async Task ApprovalsRoute_AdminRevokingAutoApprovedUplift_IsRefusedAndChangesNothing()
    {
        await using var context = CreateContext();
        await SeedAsync(context);

        var result = await RevokeAsync(
            context,
            RevokeRoute.UpliftApprovals,
            OrgWideUser("admin-1", "Admin"),
            AutoApprovedId,
            "Wrong quote attached");

        var refused = result.Should().BeOfType<BadRequestObjectResult>().Subject;
        refused.Value.Should().BeOfType<Response>().Which.Message
            .Should().StartWith("This uplift request cannot be revoked");
        await AssertUnchangedAsync(context, AutoApprovedId, UpliftStatus.NoApprovalRequired);
    }

    [Theory]
    [InlineData(RevokeRoute.UpliftApprovals)]
    [InlineData(RevokeRoute.WorkOrder)]
    public async Task AdminRevokingAdminApprovedUpliftWithReason_Succeeds(RevokeRoute route)
    {
        await using var context = CreateContext();
        await SeedAsync(context);

        var result = await RevokeAsync(
            context,
            route,
            OrgWideUser("admin-1", "Admin"),
            AdminApprovedId,
            "  Approved against the wrong quote  ");

        result.Should().BeOfType<OkObjectResult>();
        var stored = await context.DispatchUpliftRequests.AsNoTracking().SingleAsync(u => u.Id == AdminApprovedId);
        stored.Status.Should().Be(UpliftStatus.Revoked);
        stored.DecisionNote.Should().Be("Approved against the wrong quote");
        (await context.Dispatches.AsNoTracking().SingleAsync(d => d.Id == DispatchId)).NTEAmount.Should().Be(1400m);
        var audit = await context.WorkOrderAuditLogs.AsNoTracking().SingleAsync(a => a.Action == "uplift_revoke");
        audit.OldValue.Should().Be(UpliftStatus.Approved);
        audit.NewValue.Should().Be(UpliftStatus.Revoked);
    }

    [Theory]
    [InlineData(RevokeRoute.UpliftApprovals)]
    [InlineData(RevokeRoute.WorkOrder)]
    public async Task AdminRevokingAdminApprovedUpliftWithoutReason_IsRefused(RevokeRoute route)
    {
        await using var context = CreateContext();
        await SeedAsync(context);

        var result = await RevokeAsync(context, route, OrgWideUser("admin-1", "Admin"), AdminApprovedId, "   ");

        result.Should().BeOfType<BadRequestObjectResult>();
        await AssertUnchangedAsync(context, AdminApprovedId, UpliftStatus.Approved);
    }

    [Fact]
    public async Task WorkOrderRoute_DispatcherRevokingOwnAutoApprovedUpliftWithoutReason_Succeeds()
    {
        await using var context = CreateContext();
        await SeedAsync(context);
        var own = await context.DispatchUpliftRequests.SingleAsync(u => u.Id == AutoApprovedId);
        own.createdby = "dispatcher-1";
        await context.SaveChangesAsync();

        var result = await RevokeAsync(
            context,
            RevokeRoute.WorkOrder,
            OrgWideUser("dispatcher-1", "Dispatcher"),
            AutoApprovedId,
            null);

        result.Should().BeOfType<OkObjectResult>();
        var stored = await context.DispatchUpliftRequests.AsNoTracking().SingleAsync(u => u.Id == AutoApprovedId);
        stored.Status.Should().Be(UpliftStatus.Revoked);
        stored.DecisionNote.Should().BeNull();
        (await context.Dispatches.AsNoTracking().SingleAsync(d => d.Id == DispatchId)).NTEAmount.Should().Be(1000m);
    }
}