using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Implementation;
using SeaHaven.DataServices.Interfaces;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Exceptions;
using SeaHaven.Services.Helpers;
using SeaHaven.Services.Implementation;
using SeaHaven.Services.Validation;

namespace SeaHavenIndustries.Tests;

// Overdue is a dispatcher-assigned work-order type: no severity, PM catalog
// (services and completion-doc templates), and distinct from the derived
// past-due overlay.
public class WorkOrderOverdueTypeTests
{
    private const int PmServiceId = 10;
    private const int ReactiveServiceId = 11;

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

    private static void SeedServices(ApplicationDbContext context)
    {
        context.Services.AddRange(
            NewService(PmServiceId, "Backflow Preventers", WorkOrderType.PM),
            NewService(ReactiveServiceId, "Leak Repair", WorkOrderType.Reactive));
    }

    private static Service NewService(int id, string name, WorkOrderType type) => new()
    {
        Id = id,
        Name = name,
        NormalizedName = name.ToUpperInvariant(),
        Trade = "Plumbing & Water Systems",
        IconKey = "plumbing-water-systems",
        IsActive = true,
        SupportedWorkOrderTypes = new List<ServiceWorkOrderType>
        {
            new() { WorkOrderType = type }
        }
    };

    private static WorkOrderBoardCreateService NewCreateService(ApplicationDbContext context)
    {
        WorkOrderAccountTestHelpers.SeedBoardCreateScope(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),
            new ServicesRegistryService(new ServicesRegistryDataService(context)));
    }

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

    private static string ToVersion(WorkOrder workOrder)
        => Convert.ToBase64String(workOrder.RowVersion ?? new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 });

    [Fact]
    public async Task Create_Overdue_WithoutSeverity_PersistsOverdueType()
    {
        await using var context = NewContext();
        var service = NewCreateService(context);

        var result = await service.CreateAsync(new WorkOrderBoardCreateRequestDto
        {
            WorkOrderType = WorkOrderType.Overdue,
            SiteCode = "BK5",
            LocationId = 1
        }, WorkOrderAccountTestHelpers.AccountUser(), "actor-1");

        Assert.Equal(WorkOrderType.Overdue, result.WorkOrderType);
        Assert.Null(result.Severity);
        var persisted = await context.workOrders.SingleAsync();
        Assert.Equal(WorkOrderType.Overdue, persisted.WorkOrderType);
        Assert.Equal(8, (int)persisted.WorkOrderType!.Value);
    }

    [Fact]
    public async Task Create_Overdue_DropsSuppliedSeverity()
    {
        await using var context = NewContext();
        var service = NewCreateService(context);

        var result = await service.CreateAsync(new WorkOrderBoardCreateRequestDto
        {
            WorkOrderType = WorkOrderType.Overdue,
            SiteCode = "BK5",
            LocationId = 1,
            Severity = 2
        }, WorkOrderAccountTestHelpers.AccountUser(), "actor-1");

        Assert.Null(result.Severity);
        Assert.Null((await context.workOrders.SingleAsync()).Severity);
    }

    [Fact]
    public async Task Create_Overdue_AcceptsPmCatalogService()
    {
        await using var context = NewContext();
        SeedServices(context);
        var service = NewCreateService(context);

        var result = await service.CreateAsync(new WorkOrderBoardCreateRequestDto
        {
            WorkOrderType = WorkOrderType.Overdue,
            SiteCode = "BK5",
            LocationId = 1,
            ServiceId = PmServiceId
        }, WorkOrderAccountTestHelpers.AccountUser(), "actor-1");

        Assert.Equal(PmServiceId, result.ServiceId);
        Assert.Equal("Backflow Preventers", (await context.workOrders.SingleAsync()).ServiceNameSnapshot);
    }

    [Fact]
    public async Task Create_Overdue_RejectsReactiveOnlyService()
    {
        await using var context = NewContext();
        SeedServices(context);
        var service = NewCreateService(context);

        var ex = await Assert.ThrowsAsync<WorkOrderBoardValidationException>(() =>
            service.CreateAsync(new WorkOrderBoardCreateRequestDto
            {
                WorkOrderType = WorkOrderType.Overdue,
                SiteCode = "BK5",
                LocationId = 1,
                ServiceId = ReactiveServiceId
            }, WorkOrderAccountTestHelpers.AccountUser(), "actor-1"));

        Assert.Equal("ServiceInvalid", ex.Code);
    }

    [Fact]
    public async Task PatchType_ToOverdue_ClearsSeverity()
    {
        await using var context = NewContext();
        var wo = new WorkOrder
        {
            Id = 1,
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.Reactive,
            Severity = "3",
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        };
        context.workOrders.Add(wo);
        await context.SaveChangesAsync();

        var result = await NewUpdateService(context).PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.WorkOrderType,
            Value = "Overdue",
            WorkOrderVersion = ToVersion(wo)
        }, "actor-1");

        Assert.Equal(WorkOrderType.Overdue, result.WorkOrderType);
        Assert.Null(result.Severity);
        var persisted = await context.workOrders.SingleAsync(w => w.Id == 1);
        Assert.Equal(WorkOrderType.Overdue, persisted.WorkOrderType);
        Assert.Null(persisted.Severity);
    }

    // The board sends one request per field, severity before type, so correcting
    // Overdue to Emergency patches severity while the stored type is still Overdue.
    // A severity patch must not be dropped or rejected for the current type; the
    // no-severity invariant is enforced when the type itself changes.
    [Fact]
    public async Task PatchSeverityThenType_OverdueToEmergency_KeepsSeverity()
    {
        await using var context = NewContext();
        var wo = new WorkOrder
        {
            Id = 1,
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.Overdue,
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        };
        context.workOrders.Add(wo);
        await context.SaveChangesAsync();
        var service = NewUpdateService(context);

        var severityStep = await service.PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.Severity,
            Value = "2",
            WorkOrderVersion = ToVersion(wo)
        }, "actor-1");
        Assert.Null(severityStep.Severity);

        var updated = await context.workOrders.SingleAsync(w => w.Id == 1);
        var result = await service.PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.WorkOrderType,
            Value = "Emergency",
            WorkOrderVersion = ToVersion(updated)
        }, "actor-1");

        Assert.Equal(WorkOrderType.Emergency, result.WorkOrderType);
        Assert.Equal(2, result.Severity);
        var persisted = await context.workOrders.SingleAsync(w => w.Id == 1);
        Assert.Equal(WorkOrderType.Emergency, persisted.WorkOrderType);
        Assert.Equal("2", persisted.Severity);
    }

    // A severity patch with no following type change leaves a stored value on an
    // Overdue WO; the board row still reports no severity.
    [Fact]
    public async Task PatchSeverity_OnOverdue_RowShowsNoSeverity()
    {
        await using var context = NewContext();
        var wo = new WorkOrder
        {
            Id = 1,
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.Overdue,
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        };
        context.workOrders.Add(wo);
        await context.SaveChangesAsync();

        var result = await NewUpdateService(context).PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.Severity,
            Value = "3",
            WorkOrderVersion = ToVersion(wo)
        }, "actor-1");

        Assert.Equal(WorkOrderType.Overdue, result.WorkOrderType);
        Assert.Null(result.Severity);
    }

    [Fact]
    public async Task PatchType_PmWithPmService_ToOverdue_KeepsService()
    {
        await using var context = NewContext();
        SeedServices(context);
        var wo = new WorkOrder
        {
            Id = 1,
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.PM,
            ServiceId = PmServiceId,
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        };
        context.workOrders.Add(wo);
        await context.SaveChangesAsync();

        var result = await NewUpdateService(context).PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.WorkOrderType,
            Value = "Overdue",
            WorkOrderVersion = ToVersion(wo)
        }, "actor-1");

        Assert.Equal(WorkOrderType.Overdue, result.WorkOrderType);
        Assert.Equal(PmServiceId, (await context.workOrders.SingleAsync(w => w.Id == 1)).ServiceId);
    }

    [Fact]
    public async Task PatchServiceId_OnOverdue_AcceptsPmCatalogService()
    {
        await using var context = NewContext();
        SeedServices(context);
        var wo = new WorkOrder
        {
            Id = 1,
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.Overdue,
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        };
        context.workOrders.Add(wo);
        await context.SaveChangesAsync();

        await NewUpdateService(context).PatchFieldAsync(1, new WorkOrderBoardPatchRequestDto
        {
            Field = WorkOrderBoardFieldNames.ServiceId,
            Value = PmServiceId.ToString(),
            WorkOrderVersion = ToVersion(wo)
        }, "actor-1");

        var persisted = await context.workOrders.SingleAsync(w => w.Id == 1);
        Assert.Equal(PmServiceId, persisted.ServiceId);
        Assert.Equal("Backflow Preventers", persisted.Trade);
    }

    [Fact]
    public async Task GetDetail_Overdue_ResolvesPmCompletionTemplate()
    {
        await using var context = NewContext();
        context.workOrders.Add(new WorkOrder
        {
            Id = 1,
            InternalWONumber = "10000000001",
            LifecycleStatus = LifecycleStatus.Scheduled,
            WorkOrderType = WorkOrderType.Overdue,
            ScheduledDate = DateTime.UtcNow.AddDays(1),
            DocStatus = DocStatus.No,
            RowVersion = new byte[] { 1, 0, 0, 0, 0, 0, 0, 1 }
        });
        context.CompletionDocTemplates.Add(new CompletionDocTemplate
        {
            Name = "PM Completion",
            ServiceKey = "pm-generic",
            WorkOrderType = WorkOrderType.PM,
            TemplateUrl = "https://example.com/pm.pdf",
            IsActive = true
        });
        await context.SaveChangesAsync();

        var boardData = new WorkOrderBoardDataService(context);
        var resolver = WorkOrderAccountTestHelpers.Resolver(context);
        var service = new WorkOrderDetailService(
            new WorkOrderBoardService(boardData, resolver),
            new WorkOrderDetailDataService(context),
            new CompletionDocTemplateDataService(context),
            new UserDataService(context),
            resolver);

        var detail = await service.GetDetailAsync(1, WorkOrderAccountTestHelpers.OrgWideAdmin());

        Assert.NotNull(detail);
        Assert.Equal(DocStatus.No, detail!.Completion.DocStatus);
        Assert.NotNull(detail.Completion.Template);
        Assert.Equal("PM Completion", detail.Completion.Template!.Name);
    }

    [Fact]
    public async Task ListServices_Overdue_ReturnsPmCatalog()
    {
        await using var context = NewContext();
        SeedServices(context);
        await context.SaveChangesAsync();

        var services = await new ServicesRegistryService(new ServicesRegistryDataService(context))
            .GetAllAsync(true, WorkOrderType.Overdue, CancellationToken.None);

        Assert.Equal(new[] { PmServiceId }, services.Select(s => s.Id).ToArray());
    }

    [Fact]
    public async Task ListTemplates_Overdue_ReturnsPmTemplates()
    {
        await using var context = NewContext();
        context.CompletionDocTemplates.AddRange(
            new CompletionDocTemplate
            {
                Name = "PM Completion",
                ServiceKey = "pm-generic",
                WorkOrderType = WorkOrderType.PM,
                TemplateUrl = "https://example.com/pm.pdf",
                IsActive = true
            },
            new CompletionDocTemplate
            {
                Name = "Reactive Completion",
                ServiceKey = "reactive-generic",
                WorkOrderType = WorkOrderType.Reactive,
                TemplateUrl = "https://example.com/reactive.pdf",
                IsActive = true
            });
        await context.SaveChangesAsync();

        var service = new CompletionDocTemplateService(
            new CompletionDocTemplateDataService(context),
            new TeamPermissionOverrideDataService(context),
            new TeamPermissionPolicy(),
            WorkOrderAccountTestHelpers.Resolver(context));

        var templates = await service.ListAsync(null, null, WorkOrderType.Overdue, CancellationToken.None);

        Assert.Equal(new[] { "PM Completion" }, templates.Select(t => t.Name).ToArray());
    }

    [Fact]
    public async Task Search_TypeOverdue_ReturnsOverdueTypeOnly_NotPastDueRows()
    {
        await using var context = NewContext();
        var today = DateTime.UtcNow.Date;
        context.workOrders.AddRange(
            new WorkOrder
            {
                Id = 1,
                WorkOrderType = WorkOrderType.Overdue,
                ScheduledDate = today.AddDays(2),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000001"
            },
            new WorkOrder
            {
                Id = 2,
                WorkOrderType = WorkOrderType.PM,
                ScheduledDate = today.AddDays(-3),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000002"
            },
            new WorkOrder
            {
                Id = 3,
                WorkOrderType = WorkOrderType.Overdue,
                ScheduledDate = today.AddDays(-2),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000003"
            });
        await context.SaveChangesAsync();

        var result = await NewSearchService(context).SearchAsync(new WorkOrderAdvancedSearchQueryDto
        {
            DatePreset = WorkOrderAdvancedSearchDatePreset.Custom,
            DateFrom = DateOnly.FromDateTime(today.AddMonths(-1)),
            DateTo = DateOnly.FromDateTime(today.AddMonths(1)),
            Types = new List<WorkOrderType> { WorkOrderType.Overdue }
        }, WorkOrderAccountTestHelpers.OrgWideAdmin(), null);

        Assert.Equal(new[] { 1, 3 }, result.Items.Select(i => i.Id).OrderBy(id => id));
        Assert.All(result.Items, i => Assert.Equal(WorkOrderType.Overdue, i.WorkOrderType));
    }

    [Fact]
    public async Task Search_TypeOverdueWithPastDue_ReturnsIntersection()
    {
        await using var context = NewContext();
        var today = DateTime.UtcNow.Date;
        context.workOrders.AddRange(
            new WorkOrder
            {
                Id = 1,
                WorkOrderType = WorkOrderType.Overdue,
                ScheduledDate = today.AddDays(2),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000001"
            },
            new WorkOrder
            {
                Id = 2,
                WorkOrderType = WorkOrderType.PM,
                ScheduledDate = today.AddDays(-3),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000002"
            },
            new WorkOrder
            {
                Id = 3,
                WorkOrderType = WorkOrderType.Overdue,
                ScheduledDate = today.AddDays(-2),
                LifecycleStatus = LifecycleStatus.Scheduled,
                InternalWONumber = "10000000003"
            });
        await context.SaveChangesAsync();

        var result = await NewSearchService(context).SearchAsync(new WorkOrderAdvancedSearchQueryDto
        {
            DatePreset = WorkOrderAdvancedSearchDatePreset.Custom,
            DateFrom = DateOnly.FromDateTime(today.AddMonths(-1)),
            DateTo = DateOnly.FromDateTime(today.AddMonths(1)),
            Types = new List<WorkOrderType> { WorkOrderType.Overdue },
            Overdue = true
        }, WorkOrderAccountTestHelpers.OrgWideAdmin(), null);

        var row = Assert.Single(result.Items);
        Assert.Equal(3, row.Id);
        Assert.True(row.IsPastDue);
    }

    [Fact]
    public void DashboardBreakdown_CountsByTypeOnly()
    {
        var today = new DateOnly(2026, 9, 25);
        var pastDue = today.AddDays(-3).ToDateTime(TimeOnly.MinValue);
        var future = today.AddDays(3).ToDateTime(TimeOnly.MinValue);
        var rows = new List<DashboardWorkOrder>
        {
            new(1, null, WorkOrderType.Overdue, LifecycleStatus.Scheduled, null, future, null, null),
            new(2, null, WorkOrderType.PM, LifecycleStatus.Scheduled, null, pastDue, null, null),
            new(3, null, WorkOrderType.Overdue, LifecycleStatus.Scheduled, null, pastDue, null, null),
        };

        var result = DashboardMetrics.Calculate(rows, today);

        Assert.Equal(2, result.Breakdown.Overdue);
        Assert.Equal(1, result.Breakdown.PM);
        Assert.Equal(0, result.Breakdown.Other);
    }

    private static WorkOrderAdvancedSearchService NewSearchService(ApplicationDbContext context)
        => new(new WorkOrderAdvancedSearchDataService(context), WorkOrderAccountTestHelpers.Resolver(context));
}