using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using SeaHaven.DataServices.Implementation;
using SeaHaven.Services.Configuration;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Exceptions;
using SeaHaven.Services.Helpers;
using SeaHaven.Services.Implementation;
using SeaHaven.Services.Validation;
using Xunit;

namespace SeaHavenIndustries.Tests;

/// <summary>
/// SH-393: an uplift created from a work order must land on a dispatch the work order's
/// uplift reads resolve back to it (non-deleted, owned or linked), so the request is
/// listed on that work order, consumes its allowance and carries its WO number in the
/// approval queue.
/// </summary>
public sealed class WorkOrderUpliftDispatchOwnershipTests
{
    private const string NoPrimaryDispatchMessage = "Work order has no primary dispatch for uplift requests";

    private static ApplicationDbContext CreateContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;
        var context = new ApplicationDbContext(options);
        WorkOrderAccountTestHelpers.SeedBoardCreateScope(context);
        context.Vendors.Add(new Vendor { Id = 5, CompanyName = "Acme HVAC" });
        context.SaveChanges();
        return context;
    }

    private static WorkOrderBoardCreateService NewBoardCreateService(ApplicationDbContext context)
    {
        var boardData = new WorkOrderBoardDataService(context);
        var resolver = WorkOrderAccountTestHelpers.Resolver(context);
        var fieldLocks = new WorkOrderFieldLockService(new WorkOrderFieldLockDataService(context));
        return new WorkOrderBoardCreateService(
            boardData,
            new WorkOrderBoardMutationDataService(context),
            new WorkOrderBoardService(boardData, resolver),
            new WorkOrderAuditService(new WorkOrderAuditDataService(context), fieldLocks),
            new WorkOrderBoardCreateValidation(),
            resolver,
            new WorkOrderPocDataService(context));
    }

    private static WorkOrderBoardUpdateService NewBoardUpdateService(ApplicationDbContext context)
    {
        var fieldLocks = new WorkOrderFieldLockService(new WorkOrderFieldLockDataService(context));
        return new WorkOrderBoardUpdateService(
            new WorkOrderBoardDataService(context),
            new WorkOrderBoardMutationDataService(context),
            new WorkOrderAuditService(new WorkOrderAuditDataService(context), fieldLocks));
    }

    private static WorkOrderUpliftService NewUpliftService(ApplicationDbContext context)
    {
        return new WorkOrderUpliftService(
            new UpliftDataService(context),
            new DispatchDataService(context),
            new WorkOrderDetailDataService(context),
            WorkOrderAccountTestHelpers.Resolver(context),
            new UserDataService(context),
            TimeProvider.System,
            Options.Create(new ApprovalsOptions
            {
                UpliftTier1MaxUsd = 2500m,
                Tier1Roles = new[] { "Approver" },
                Tier2Roles = new[] { "Manager" },
            }));
    }

    private static Task<WorkOrderBoardRowDto> BoardCreateWithVendorAsync(
        ApplicationDbContext context,
        bool? isAddOn = null)
    {
        return NewBoardCreateService(context).CreateAsync(new WorkOrderBoardCreateRequestDto
        {
            WorkOrderType = WorkOrderType.PM,
            SiteCode = "BK5",
            LocationId = 1,
            VendorId = 5,
            IsAddOn = isAddOn,
        }, WorkOrderAccountTestHelpers.AccountUser(), "actor-1");
    }

    private static Task<WorkOrderUpliftDto?> CreateUpliftAsync(
        ApplicationDbContext context,
        int workOrderId,
        decimal amount,
        int accountId = 1)
    {
        return NewUpliftService(context).CreateAsync(
            workOrderId,
            new CreateWorkOrderUpliftRequestDto { Amount = amount, Notes = "Extra coil work" },
            WorkOrderAccountTestHelpers.AccountUser(accountId: accountId),
            CancellationToken.None);
    }

    private static async Task<(int WorkOrderId, int PrimaryDispatchId)> SeedWorkOrderAsync(
        ApplicationDbContext context,
        Dispatch primary,
        params Dispatch[] others)
    {
        context.Dispatches.Add(primary);
        context.Dispatches.AddRange(others);
        context.workOrders.Add(new WorkOrder
        {
            Id = 1,
            InternalWONumber = "SH00001",
            AccountId = 1,
            WorkOrderType = WorkOrderType.PM,
            PrimaryDispatchId = primary.Id,
        });
        await context.SaveChangesAsync();
        return (1, primary.Id);
    }

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

        var row = await BoardCreateWithVendorAsync(context);

        var dispatch = await context.Dispatches.SingleAsync(d => d.Id == row.PrimaryDispatchId);
        Assert.Equal(row.Id, dispatch.WorkOrderId);
    }

    [Fact]
    public async Task BoardCreatedWorkOrder_PatchApptDate_KeepsPrimaryDispatch()
    {
        await using var context = CreateContext();
        var row = await BoardCreateWithVendorAsync(context);
        var workOrder = await context.workOrders.SingleAsync(w => w.Id == row.Id);
        var dispatch = await context.Dispatches.SingleAsync(d => d.Id == row.PrimaryDispatchId);
        workOrder.RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 };
        dispatch.RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 2 };
        await context.SaveChangesAsync();

        var patched = await NewBoardUpdateService(context).PatchFieldAsync(row.Id, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.ApptDate,
            Value = "2026-10-05",
            WorkOrderVersion = Convert.ToBase64String(workOrder.RowVersion),
            DispatchVersion = Convert.ToBase64String(dispatch.RowVersion),
        }, "actor-1");

        Assert.Equal(row.PrimaryDispatchId, patched.PrimaryDispatchId);
        Assert.Equal(1, await context.Dispatches.CountAsync());
    }

    [Fact]
    public async Task BoardCreatedWorkOrder_AutoApprovedUplift_IsListedAndConsumesAllowance()
    {
        await using var context = CreateContext();
        var row = await BoardCreateWithVendorAsync(context);

        var created = await CreateUpliftAsync(context, row.Id, 400m);

        Assert.Equal("auto_approved", created!.Status);
        var listed = await NewUpliftService(context).ListAsync(
            row.Id,
            WorkOrderAccountTestHelpers.AccountUser(),
            CancellationToken.None);
        var uplift = Assert.Single(listed!);
        Assert.Equal(created.Id, uplift.Id);
        Assert.Equal(400m, await new UpliftDataService(context)
            .SumAutoApprovedAmountForWorkOrderAsync(row.Id, CancellationToken.None));
    }

    [Fact]
    public async Task BoardCreatedWorkOrder_RequestBeyondRemainingAllowance_GoesToPendingWithWorkOrderNumber()
    {
        await using var context = CreateContext();
        var row = await BoardCreateWithVendorAsync(context);
        await CreateUpliftAsync(context, row.Id, 400m);

        var second = await CreateUpliftAsync(context, row.Id, 200m);

        Assert.Equal("pending", second!.Status);
        var (_, queue) = await new UpliftDataService(context)
            .GetPagedAsync("Pending", null, 1, 25, CancellationToken.None);
        var queued = Assert.Single(queue);
        Assert.Equal(second.Id, queued.Id);
        Assert.Equal(row.Id, queued.WorkOrderId);
        Assert.Equal(row.WoNumber, queued.WorkOrderNumber);
    }

    [Fact]
    public async Task BoardCreatedWorkOrder_OwnerRevokesAutoApprovedUplift()
    {
        await using var context = CreateContext();
        var row = await BoardCreateWithVendorAsync(context);
        var created = await CreateUpliftAsync(context, row.Id, 1m);

        var revoked = await NewUpliftService(context).RevokeAsync(
            row.Id,
            created!.Id,
            new RevokeWorkOrderUpliftRequestDto(),
            WorkOrderAccountTestHelpers.AccountUser(),
            CancellationToken.None);

        Assert.Equal("revoked", revoked!.Status);
        Assert.Equal(0m, await new UpliftDataService(context)
            .SumAutoApprovedAmountForWorkOrderAsync(row.Id, CancellationToken.None));
    }

    [Fact]
    public async Task ExAddOnWorkOrder_AfterScheduleClearsAddOn_UpliftIsListedOnWorkOrder()
    {
        await using var context = CreateContext();
        var row = await BoardCreateWithVendorAsync(context, isAddOn: true);
        Assert.True(row.IsAddOn);
        var workOrder = await context.workOrders.SingleAsync(w => w.Id == row.Id);
        workOrder.RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 };
        await context.SaveChangesAsync();
        var rescheduled = await NewBoardUpdateService(context).PatchFieldAsync(row.Id, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.ScheduledDate,
            Value = DateTime.UtcNow.Date.AddDays(60).ToString("yyyy-MM-dd"),
            WorkOrderVersion = Convert.ToBase64String(workOrder.RowVersion),
        }, "actor-1");
        Assert.False(rescheduled.IsAddOn);

        var created = await CreateUpliftAsync(context, row.Id, 1m);

        var listed = await NewUpliftService(context).ListAsync(
            row.Id,
            WorkOrderAccountTestHelpers.AccountUser(),
            CancellationToken.None);
        Assert.Equal(created!.Id, Assert.Single(listed!).Id);
    }

    [Fact]
    public async Task Create_SoftDeletedPrimaryDispatch_UsesOwnedLiveDispatch()
    {
        await using var context = CreateContext();
        var (workOrderId, _) = await SeedWorkOrderAsync(
            context,
            new Dispatch { Id = 10, VendorId = 5, WorkOrderId = 1, NTEAmount = 1000m, IsDeleted = true },
            new Dispatch { Id = 11, VendorId = 5, WorkOrderId = 1, NTEAmount = 800m });

        var created = await CreateUpliftAsync(context, workOrderId, 100m);

        var request = await context.DispatchUpliftRequests.SingleAsync(u => u.Id == created!.Id);
        Assert.Equal(11, request.DispatchId);
        Assert.Equal(1000m, (await context.Dispatches.SingleAsync(d => d.Id == 10)).NTEAmount);
        Assert.Equal(900m, (await context.Dispatches.SingleAsync(d => d.Id == 11)).NTEAmount);
    }

    [Fact]
    public async Task Create_OnlySoftDeletedPrimaryDispatch_IsRejectedWithoutPersisting()
    {
        await using var context = CreateContext();
        var (workOrderId, _) = await SeedWorkOrderAsync(
            context,
            new Dispatch { Id = 10, VendorId = 5, WorkOrderId = 1, NTEAmount = 1000m, IsDeleted = true });

        var error = await Assert.ThrowsAsync<InvalidOperationException>(
            () => CreateUpliftAsync(context, workOrderId, 100m));

        Assert.Equal(NoPrimaryDispatchMessage, error.Message);
        Assert.Empty(context.DispatchUpliftRequests);
        Assert.Empty(context.WorkOrderAuditLogs);
    }

    [Fact]
    public async Task Create_PrimaryDispatchOwnedByAnotherWorkOrder_IsNotUsed()
    {
        await using var context = CreateContext();
        context.workOrders.Add(new WorkOrder { Id = 2, InternalWONumber = "SH00002", AccountId = 1 });
        var (workOrderId, _) = await SeedWorkOrderAsync(
            context,
            new Dispatch { Id = 10, VendorId = 5, WorkOrderId = 2, NTEAmount = 1000m });

        var error = await Assert.ThrowsAsync<InvalidOperationException>(
            () => CreateUpliftAsync(context, workOrderId, 100m));

        Assert.Equal(NoPrimaryDispatchMessage, error.Message);
        Assert.Empty(context.DispatchUpliftRequests);
        Assert.Equal(1000m, (await context.Dispatches.SingleAsync(d => d.Id == 10)).NTEAmount);
    }

    [Fact]
    public async Task Create_UnlinkedPrimaryDispatch_IsRejectedInsteadOfHidingTheUplift()
    {
        await using var context = CreateContext();
        var (workOrderId, _) = await SeedWorkOrderAsync(
            context,
            new Dispatch { Id = 10, VendorId = 5, WorkOrderId = null, NTEAmount = 1000m });

        var error = await Assert.ThrowsAsync<InvalidOperationException>(
            () => CreateUpliftAsync(context, workOrderId, 100m));

        Assert.Equal(NoPrimaryDispatchMessage, error.Message);
        Assert.Empty(context.DispatchUpliftRequests);
    }

    [Fact]
    public async Task Create_PrimaryDispatchLinkedThroughDispatchWorkOrders_IsUsed()
    {
        await using var context = CreateContext();
        context.workOrders.Add(new WorkOrder { Id = 2, InternalWONumber = "SH00002", AccountId = 1 });
        var (workOrderId, _) = await SeedWorkOrderAsync(
            context,
            new Dispatch { Id = 10, VendorId = 5, WorkOrderId = 2, NTEAmount = 1000m });
        context.DispatchWorkOrders.Add(new DispatchWorkOrder { DispatchId = 10, WorkOrderId = workOrderId });
        await context.SaveChangesAsync();

        var created = await CreateUpliftAsync(context, workOrderId, 100m);

        var listed = await NewUpliftService(context).ListAsync(
            workOrderId,
            WorkOrderAccountTestHelpers.AccountUser(),
            CancellationToken.None);
        Assert.Equal(created!.Id, Assert.Single(listed!).Id);
    }

    [Fact]
    public async Task CrossTenant_CreateAndList_AreRejected()
    {
        await using var context = CreateContext();
        await WorkOrderAccountTestHelpers.EnsureAccountAsync(context, id: 2, name: "Other Corp");
        var row = await BoardCreateWithVendorAsync(context);
        await CreateUpliftAsync(context, row.Id, 1m);

        var created = await CreateUpliftAsync(context, row.Id, 1m, accountId: 2);
        var listed = await NewUpliftService(context).ListAsync(
            row.Id,
            WorkOrderAccountTestHelpers.AccountUser(accountId: 2),
            CancellationToken.None);

        Assert.Null(created);
        Assert.Null(listed);
        Assert.Equal(1, await context.DispatchUpliftRequests.CountAsync());
    }
}