using System.Security.Claims;
using Data.SeaHavenIndustries;
using FluentAssertions;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Implementation;
using SeaHaven.Services.Exceptions;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Helpers;
using SeaHaven.Services.Implementation;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

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

    private static DashboardService NewService(ApplicationDbContext ctx)
    {
        var resolver = new WorkOrderAccountResolver(
            new AccountDataService(ctx),
            new LocationDataService(ctx));
        return new DashboardService(new DashboardDataService(ctx), resolver);
    }

    private static ClaimsPrincipal AccountUser(
        int accountId,
        string userId = "dispatcher-1",
        string role = "Admin")
    {
        var claims = new[]
        {
            new Claim(SeaHavenClaimTypes.AccountId, accountId.ToString()),
            new Claim(ClaimTypes.NameIdentifier, userId),
            new Claim(ClaimTypes.Role, role)
        };
        return new ClaimsPrincipal(new ClaimsIdentity(claims, "test"));
    }

    private static ClaimsPrincipal OrgWideUser()
    {
        var claims = new[]
        {
            new Claim(SeaHavenClaimTypes.OrgScope, SeaHavenClaimTypes.OrgScopeAll),
            new Claim(ClaimTypes.Role, "Admin")
        };
        return new ClaimsPrincipal(new ClaimsIdentity(claims, "test"));
    }

    [Fact]
    public async Task GetStatsAsync_CountsByStatusExcludingTemplates()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = false },
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = false, AssignTo = "u1" },
            new WorkOrder { AccountId = 1, Status = "In Progress" },
            new WorkOrder { AccountId = 1, Status = "On Hold" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = true },
            new WorkOrder { AccountId = 1, Status = "Cancelled" },
            new WorkOrder { AccountId = 2, Status = "Open" },
            new WorkOrder { Status = "Open" }
        );
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(7);
        stats.Open.Should().Be(4);
        stats.NotDispatched.Should().Be(1);
        stats.Completed.Should().Be(2);
    }

    [Fact]
    public async Task GetStatsAsync_OrgWideUserSeesAllNonTemplateOrders()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open" },
            new WorkOrder { AccountId = 2, Status = "Done" },
            new WorkOrder { Status = "Open", istemplate = true });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            OrgWideUser(), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(2);
        stats.Open.Should().Be(1);
        stats.Completed.Should().Be(1);
    }

    [Fact]
    public async Task GetStatsAsync_ExposesKpiCounts_PendingUpliftsCountsPendingStatusOnly()
    {
        using var ctx = NewContext();
        var today = DashboardBusinessTime.Today();
        var tomorrow = today.AddDays(1);

        // Scheduled-tomorrow tile: one account-1 order scheduled for tomorrow.
        ctx.workOrders.Add(new WorkOrder
        {
            AccountId = 1,
            LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
            ScheduledDate = tomorrow.ToDateTime(TimeOnly.MinValue)
        });

        // Aveta-pending tile: Aveta-required order in the today/tomorrow window
        // with no Aveta attachment. Its Dispatch anchors the uplift requests below.
        var avetaOrder = new WorkOrder
        {
            AccountId = 1,
            AvetaRequired = true,
            LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
            ScheduledDate = today.ToDateTime(TimeOnly.MinValue)
        };
        ctx.workOrders.Add(avetaOrder);
        ctx.SaveChanges();

        var dispatch = new Dispatch { WorkOrderId = avetaOrder.Id, IsDeleted = false };
        ctx.Set<Dispatch>().Add(dispatch);
        ctx.SaveChanges();

        // Pending-uplifts tile: only Status == "Pending" is an outstanding uplift
        // awaiting an approval decision. This test pins the behaviour the code
        // ships today: a "ChangesRequested" request has been sent back to the
        // vendor, so it is NOT counted. Whether pendingUplifts should also include
        // ChangesRequested is an open product call, not a settled review decision.
        ctx.Set<DispatchUpliftRequest>().AddRange(
            new DispatchUpliftRequest { DispatchId = dispatch.Id, Status = "Pending", IsDeleted = false },
            new DispatchUpliftRequest { DispatchId = dispatch.Id, Status = "ChangesRequested", IsDeleted = false });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.ScheduledTomorrow.Should().Be(1);
        stats.AvetaPending.Should().Be(1);
        stats.PendingUplifts.Should().Be(1);
    }

    [Fact]
    public async Task GetStatsAsync_MissingScopeFailsClosed()
    {
        using var ctx = NewContext();
        var user = new ClaimsPrincipal(new ClaimsIdentity(new[]
        {
            new Claim(ClaimTypes.Role, "Dispatcher")
        }, "test"));

        var act = () => NewService(ctx).GetStatsAsync(
            user, new DashboardStatsQueryDTO(), CancellationToken.None);

        var exception = await act.Should().ThrowAsync<WorkOrderBoardValidationException>();

        exception.Which.Code.Should().Be("Forbidden");
    }

    [Fact]
    public async Task GetStatsAsync_UsesDashboardMetricRulesForDateRange()
    {
        using var ctx = NewContext();
        var today = DashboardBusinessTime.Today();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.PM,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-6)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.Emergency,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.InProgress,
                ScheduledDate = today.AddDays(-3).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.Reactive,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-15),
                CompletedDate = today.AddDays(-12).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.PM,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Incomplete,
                ScheduledDate = today.AddDays(4).ToDateTime(TimeOnly.MinValue)
            });
        ctx.SaveChanges();

        var query = new DashboardStatsQueryDTO
        {
            DateFrom = today.AddDays(-10),
            DateTo = today.AddDays(10)
        };
        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1), query, CancellationToken.None);

        stats.Total.Should().Be(4);
        stats.Breakdown.Overdue.Should().Be(0);
        stats.Breakdown.Other.Should().Be(0);
        stats.Breakdown.PM.Should().Be(2);
        stats.Breakdown.Emergency.Should().Be(1);
        stats.Breakdown.Reactive.Should().Be(1);
        (stats.Breakdown.PM + stats.Breakdown.Emergency + stats.Breakdown.Reactive
            + stats.Breakdown.Overdue + stats.Breakdown.Other).Should().Be(stats.Total);
        stats.DueCount.Should().Be(3);
        stats.CompletedDueCount.Should().Be(1);
        stats.CompletionRate.Should().Be(33.33m);
        stats.AverageResolutionDays.Should().Be(3m);
    }

    [Fact]
    public async Task GetStatsAsync_DispatcherOnlySeesAssignedOrders()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, role: "Dispatcher"), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(1);
        stats.Open.Should().Be(1);
    }

    [Fact]
    public async Task GetWorkloadAsync_UsesRoleScopeAndExcludesTerminalOrdersFromOpenCount()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.AddRange(
            new ApplicationUser { Id = "dispatcher-1", FirstName = "Ada", LastName = "One" },
            new ApplicationUser { Id = "dispatcher-2", FirstName = "Ben", LastName = "Two" });
        ctx.UserRoles.AddRange(
            new IdentityUserRole<string> { UserId = "dispatcher-1", RoleId = "dispatcher-role" },
            new IdentityUserRole<string> { UserId = "dispatcher-2", RoleId = "dispatcher-role" });
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", Status = "Open" },
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed },
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-2", Status = "Open" });
        ctx.SaveChanges();

        var result = await NewService(ctx).GetWorkloadAsync(
            AccountUser(1, "dispatcher-1", "Dispatcher"),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        result.TotalDispatchers.Should().Be(2);
        result.Items.Select(item => item.DispatcherName)
            .Should().ContainInOrder("Ada One", "Ben Two");
        result.Items[0].TotalCount.Should().Be(2);
        result.Items[0].OpenCount.Should().Be(1);
        result.Items[1].TotalCount.Should().Be(0);
        result.Items[1].OpenCount.Should().Be(0);
        result.PageSize.Should().Be(10);

        var adminResult = await NewService(ctx).GetWorkloadAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        adminResult.TotalDispatchers.Should().Be(2);
        adminResult.Items.Select(item => item.DispatcherName)
            .Should().ContainInOrder("Ada One", "Ben Two");

        var performance = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        performance.TotalDispatchers.Should().Be(2);
        performance.Items[0].DispatcherName.Should().Be("Ada One");
    }

    [Fact]
    public async Task GetPerformanceAsync_UsesDueOnlyRateAndOriginalDateResolution()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.Add(new ApplicationUser
        {
            Id = "dispatcher-1",
            FirstName = "Ada",
            LastName = "One",
            Color = "#123456"
        });
        ctx.UserRoles.Add(new IdentityUserRole<string>
        {
            UserId = "dispatcher-1",
            RoleId = "dispatcher-role"
        });
        var today = DashboardBusinessTime.Today();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-5),
                CompletedDate = today.AddDays(-2).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = today.AddDays(3).ToDateTime(TimeOnly.MinValue)
            });
        ctx.SaveChanges();

        var result = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        result.Items.Should().ContainSingle();
        result.Items[0].CompletionRate.Should().Be(100m);
        result.Items[0].AverageResolutionDays.Should().Be(3m);
        result.Items[0].Color.Should().Be("#123456");
    }

    [Fact]
    public async Task GetRegionsAsync_UsesCanonicalBucketsAndUnmappedOther()
    {
        await using var ctx = NewContext();
        ctx.Locations.AddRange(
            new Locations { Id = 1, State = "NY" },
            new Locations { Id = 2, State = "ca" },
            new Locations { Id = 3, State = "XX" },
            new Locations { Id = 4, State = "indiana" },
            new Locations { Id = 5, State = "NEW YORK" },
            new Locations { Id = 6, State = "California" });
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, LocationId = 1 },
            new WorkOrder { AccountId = 1, LocationId = 2 },
            new WorkOrder { AccountId = 1, LocationId = 3 },
            new WorkOrder { AccountId = 1, LocationId = 4 },
            new WorkOrder { AccountId = 1, LocationId = 5 },
            new WorkOrder { AccountId = 1, LocationId = 6 },
            new WorkOrder { AccountId = 1, LocationId = null });
        await ctx.SaveChangesAsync();

        var result = await NewService(ctx).GetRegionsAsync(
            AccountUser(1), new DashboardStatsQueryDTO(), CancellationToken.None);

        result.Items.Select(row => row.Region).Should().Equal(
            "East", "Central", "West", "California", "Unmapped/Other");
        // NY + "NEW YORK" -> East; "indiana" -> Central; "ca" + "California" -> California;
        // "XX" + unassigned location -> Unmapped/Other. Full-name storage forms must not
        // fall through to Unmapped/Other (SH-348 review).
        result.Items.Select(row => row.WorkOrderCount).Should().Equal(2, 1, 0, 2, 2);
    }

    [Fact]
    public void Resolve_MapsEveryUsStateAndItsFullNameToACanonicalBucket()
    {
        foreach (var code in UsStateCodes.All)
        {
            var byCode = DashboardRegions.Resolve(code);
            byCode.Should().NotBe(
                "Unmapped/Other",
                $"state code {code} must belong to a canonical region");

            var fullName = UsStateCodes.ExpandStorageValues(new[] { code })
                .First(value => value != code);
            DashboardRegions.Resolve(fullName).Should().Be(
                byCode,
                $"the full-name storage form of {code} must resolve to the same region as the code");
        }
    }

    [Fact]
    public async Task GetVendorInsightsAsync_IsCompanyWideAndUsesVendorMetrics()
    {
        await using var ctx = NewContext();
        ctx.VendorCompanies.Add(new VendorCompany { Id = 10, Name = "Acme Services", IsDeleted = false });
        ctx.Vendors.Add(new Vendor
        {
            Id = 20,
            CompanyId = 10,
            IsActive = true,
            CompanyName = "Acme Services"
        });
        ctx.Dispatches.Add(new Dispatch { Id = 30, VendorId = 20 });
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                PrimaryDispatchId = 30,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = DateTime.UtcNow.Date.AddDays(-3),
                CompletedDate = DateTime.UtcNow.Date.AddDays(-1),
                RescheduleCount = 1
            },
            new WorkOrder
            {
                AccountId = 1,
                PrimaryDispatchId = 30,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = DateTime.UtcNow.Date.AddDays(-2),
                CompletedDate = DateTime.UtcNow.Date.AddDays(-1)
            });
        await ctx.SaveChangesAsync();

        var result = await NewService(ctx).GetVendorInsightsAsync(
            AccountUser(1), CancellationToken.None);

        result.TotalVendors.Should().Be(1);
        result.Items.Should().ContainSingle();
        result.Items[0].TotalJobs.Should().Be(2);
        result.Items[0].CompletionRate.Should().Be(100);
        result.Items[0].RescheduleRate.Should().Be(50);
    }

    [Fact]
    public async Task GetStatsAsync_DispatcherQuerySelectionCannotBroadenScope()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var query = new DashboardStatsQueryDTO { DispatcherId = "dispatcher-2" };
        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, "dispatcher-1", "Dispatcher"), query, CancellationToken.None);

        stats.Total.Should().Be(2);
        stats.Open.Should().Be(2);
    }

    [Fact]
    public async Task GetStatsAsync_AdminCanSelectIndividualDispatcherOrMine()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Done", AssignTo = "admin-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var service = NewService(ctx);

        var selected = await service.GetStatsAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO { DispatcherId = "dispatcher-2" },
            CancellationToken.None);
        selected.Total.Should().Be(3);
        selected.Open.Should().Be(3);

        var mine = await service.GetStatsAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO { DispatcherId = "mine" },
            CancellationToken.None);
        mine.Total.Should().Be(1);
        mine.Completed.Should().Be(1);

        var all = await service.GetStatsAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO(),
            CancellationToken.None);
        all.Total.Should().Be(4);
    }

    [Fact]
    public async Task GetStatsAsync_ManagerSelectionScopesStats()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, "manager-1", "Manager"),
            new DashboardStatsQueryDTO { DispatcherId = "dispatcher-2" },
            CancellationToken.None);

        stats.Total.Should().Be(1);
    }

    [Fact]
    public async Task GetStatsAsync_SchedulerSelectionScopesStats()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, "scheduler-1", "Scheduler"),
            new DashboardStatsQueryDTO { DispatcherId = "dispatcher-2" },
            CancellationToken.None);

        stats.Total.Should().Be(1);
    }

    [Fact]
    public async Task GetDashboardAsync_UnauthorizedRoleFailsClosed()
    {
        using var ctx = NewContext();
        var service = NewService(ctx);
        var user = AccountUser(1, "tech-1", "Technician");

        var statsAct = () => service.GetStatsAsync(
            user, new DashboardStatsQueryDTO(), CancellationToken.None);
        var statsException = await statsAct.Should().ThrowAsync<WorkOrderBoardValidationException>();
        statsException.Which.Code.Should().Be("Forbidden");

        var workloadAct = () => service.GetWorkloadAsync(
            user, new DashboardStatsQueryDTO(), 1, CancellationToken.None);
        var workloadException = await workloadAct.Should().ThrowAsync<WorkOrderBoardValidationException>();
        workloadException.Which.Code.Should().Be("Forbidden");

        var performanceAct = () => service.GetPerformanceAsync(
            user, new DashboardStatsQueryDTO(), 1, CancellationToken.None);
        var performanceException = await performanceAct.Should().ThrowAsync<WorkOrderBoardValidationException>();
        performanceException.Which.Code.Should().Be("Forbidden");

        var regionsAct = () => service.GetRegionsAsync(
            user, new DashboardStatsQueryDTO(), CancellationToken.None);
        var regionsException = await regionsAct.Should().ThrowAsync<WorkOrderBoardValidationException>();
        regionsException.Which.Code.Should().Be("Forbidden");

        var trendAct = () => service.GetTrendAsync(
            user, new DashboardTrendQueryDTO(), CancellationToken.None);
        var trendException = await trendAct.Should().ThrowAsync<WorkOrderBoardValidationException>();
        trendException.Which.Code.Should().Be("Forbidden");
    }

    [Fact]
    public async Task GetWorkloadAsync_IndividualSelectionPreservesRosterWithZeroRows()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.AddRange(
            new ApplicationUser { Id = "dispatcher-1", FirstName = "Ada", LastName = "One" },
            new ApplicationUser { Id = "dispatcher-2", FirstName = "Ben", LastName = "Two" });
        ctx.UserRoles.AddRange(
            new IdentityUserRole<string> { UserId = "dispatcher-1", RoleId = "dispatcher-role" },
            new IdentityUserRole<string> { UserId = "dispatcher-2", RoleId = "dispatcher-role" });
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", Status = "Open" },
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", Status = "Open" });
        ctx.SaveChanges();

        var workload = await NewService(ctx).GetWorkloadAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO { DispatcherId = "dispatcher-1" },
            1,
            CancellationToken.None);

        workload.TotalDispatchers.Should().Be(2);
        workload.Items.Should().HaveCount(2);
        workload.Items[0].DispatcherId.Should().Be("dispatcher-1");
        workload.Items[0].TotalCount.Should().Be(2);
        workload.Items[0].OpenCount.Should().Be(2);
        workload.Items[1].DispatcherId.Should().Be("dispatcher-2");
        workload.Items[1].TotalCount.Should().Be(0);
        workload.Items[1].OpenCount.Should().Be(0);
        workload.Page.Should().Be(1);
        workload.PageSize.Should().Be(10);

        var performance = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO { DispatcherId = "dispatcher-1" },
            1,
            CancellationToken.None);

        performance.TotalDispatchers.Should().Be(2);
        performance.Items.Should().HaveCount(2);
        performance.Items[0].DispatcherId.Should().Be("dispatcher-1");
        performance.Items[0].AssignedCount.Should().Be(2);
        performance.Items[1].DispatcherId.Should().Be("dispatcher-2");
        performance.Items[1].AssignedCount.Should().Be(0);
        performance.Items[1].CompletedCount.Should().Be(0);
    }

    [Fact]
    public async Task GetPerformanceAsync_PopulatesAssignedAndCompletedCounts()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.Add(new ApplicationUser { Id = "dispatcher-1", FirstName = "Ada", LastName = "One" });
        ctx.UserRoles.Add(new IdentityUserRole<string>
        {
            UserId = "dispatcher-1",
            RoleId = "dispatcher-role"
        });
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed
            },
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled
            },
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Canceled
            });
        ctx.SaveChanges();

        var result = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        result.Items.Should().ContainSingle();
        result.Items[0].AssignedCount.Should().Be(3);
        result.Items[0].CompletedCount.Should().Be(1);
    }

    [Fact]
    public async Task GetStatsAsync_StatusDistributionBucketsResolvedStatuses()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled
            },
            new WorkOrder { AccountId = 1, Status = "In Progress" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Unparseable" });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO(),
            CancellationToken.None);

        stats.StatusDistribution.Should().HaveCount(4);
        stats.StatusDistribution
            .Select(bucket => (bucket.Status, bucket.Count))
            .Should().BeEquivalentTo(new[]
            {
                (Status: "Completed", Count: 2),
                (Status: "In Progress", Count: 1),
                (Status: "Scheduled", Count: 1),
                (Status: "Unknown", Count: 1)
            });
        stats.StatusDistribution.Sum(bucket => bucket.Count).Should().Be(5);
    }

    [Fact]
    public async Task GetStatsAsync_StatusDistributionIsEmptyWithoutWorkOrders()
    {
        using var ctx = NewContext();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, "admin-1"),
            new DashboardStatsQueryDTO(),
            CancellationToken.None);

        stats.StatusDistribution.Should().BeEmpty();
    }

    [Fact]
    public async Task GetTrendAsync_DailyBucketsClassifyByCalendarScheduledDate()
    {
        using var ctx = NewContext();
        // ScheduledDate is a stored calendar value (board writes persist `.Date`), so a work
        // order buckets on its own calendar day regardless of the time-of-day component. The
        // UTC hours below were previously shifted a full day by an America/New_York conversion
        // (03:00 UTC -> prior evening), so they double as a regression guard: each row must now
        // stay on the calendar date it was scheduled for.
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 1, 15, 3, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Canceled,
                ScheduledDate = new DateTime(2026, 1, 14, 15, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = new DateTime(2026, 1, 15, 17, 0, 0, DateTimeKind.Utc),
                CompletedDate = new DateTime(2026, 1, 16, 15, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 1, 16, 3, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 1, 17, 3, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 1, 13, 20, 0, 0, DateTimeKind.Utc)
            });
        ctx.SaveChanges();

        var query = new DashboardTrendQueryDTO
        {
            DateFrom = new DateOnly(2026, 1, 14),
            DateTo = new DateOnly(2026, 1, 16)
        };
        var trend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), query, CancellationToken.None);

        trend.Granularity.Should().Be("day");
        trend.Buckets.Select(bucket => bucket.Date).Should().Equal(
            new DateOnly(2026, 1, 14), new DateOnly(2026, 1, 15), new DateOnly(2026, 1, 16));
        trend.Buckets.Select(bucket => bucket.Label).Should().Equal(
            "2026-01-14", "2026-01-15", "2026-01-16");

        // 01-14: only the canceled row scheduled that calendar day.
        trend.Buckets[0].Total.Should().Be(1);
        trend.Buckets[0].Open.Should().Be(0);
        trend.Buckets[0].Canceled.Should().Be(1);
        trend.Buckets[0].Completed.Should().Be(0);
        trend.Buckets[0].Overdue.Should().Be(0);

        // 01-15: the 03:00 UTC scheduled row (no longer shifted to 01-14) plus the completed row.
        trend.Buckets[1].Total.Should().Be(2);
        trend.Buckets[1].Open.Should().Be(1);
        trend.Buckets[1].Completed.Should().Be(1);
        trend.Buckets[1].Canceled.Should().Be(0);
        trend.Buckets[1].Overdue.Should().Be(1);

        // 01-16: the 03:00 UTC scheduled row that stays on its own day.
        trend.Buckets[2].Total.Should().Be(1);
        trend.Buckets[2].Open.Should().Be(1);
        trend.Buckets[2].Overdue.Should().Be(1);

        trend.Buckets.Should().OnlyContain(bucket => !bucket.IsCurrent);
    }

    [Fact]
    public async Task GetTrendAsync_MidnightScheduledDateStaysInTodayBucketAndIsNotOverdue()
    {
        using var ctx = NewContext();
        var today = DashboardBusinessTime.Today();
        // A board-scheduled work order for today is stored as midnight (`.Date`). It must land
        // in the Today bucket and count as open, not roll back to yesterday and read as overdue.
        ctx.workOrders.Add(new WorkOrder
        {
            AccountId = 1,
            LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
            ScheduledDate = today.ToDateTime(TimeOnly.MinValue)
        });
        ctx.SaveChanges();

        var query = new DashboardTrendQueryDTO
        {
            DateFrom = today.AddDays(-1),
            DateTo = today.AddDays(1)
        };
        var trend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), query, CancellationToken.None);

        var todayBucket = trend.Buckets.Single(bucket => bucket.Date == today);
        todayBucket.Total.Should().Be(1);
        todayBucket.Open.Should().Be(1);
        todayBucket.Overdue.Should().Be(0);

        var yesterdayBucket = trend.Buckets.Single(bucket => bucket.Date == today.AddDays(-1));
        yesterdayBucket.Total.Should().Be(0);
    }

    [Fact]
    public async Task GetTrendAsync_ThreeMonthRangeUsesWeeklyMondayBuckets()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 6, 17, 12, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 6, 16, 3, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = new DateTime(2026, 9, 16, 12, 0, 0, DateTimeKind.Utc),
                CompletedDate = new DateTime(2026, 9, 16, 18, 0, 0, DateTimeKind.Utc)
            });
        ctx.SaveChanges();

        var query = new DashboardTrendQueryDTO
        {
            Range = "3m",
            DateFrom = new DateOnly(2026, 6, 17),
            DateTo = new DateOnly(2026, 9, 16)
        };
        var trend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), query, CancellationToken.None);

        trend.Granularity.Should().Be("week");
        trend.Buckets.Should().HaveCount(14);
        trend.Buckets.Select(bucket => bucket.Date.DayOfWeek)
            .Should().OnlyContain(day => day == DayOfWeek.Monday);
        trend.Buckets[0].Date.Should().Be(new DateOnly(2026, 6, 15));
        trend.Buckets[0].Total.Should().Be(2);
        trend.Buckets[0].Open.Should().Be(2);
        trend.Buckets[^1].Date.Should().Be(new DateOnly(2026, 9, 14));
        trend.Buckets[^1].Total.Should().Be(1);
        trend.Buckets[^1].Completed.Should().Be(1);
    }

    [Fact]
    public async Task GetTrendAsync_YearFilterUsesMonthlyBuckets()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 1, 15, 12, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = new DateTime(2026, 3, 20, 4, 0, 0, DateTimeKind.Utc),
                CompletedDate = new DateTime(2026, 3, 21, 4, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2025, 12, 31, 20, 0, 0, DateTimeKind.Utc)
            },
            // 2027-01-01 by calendar: outside the 2026 window. Previously an
            // America/New_York conversion pulled it back to 2026-12-31 and into December.
            new WorkOrder
            {
                AccountId = 1,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2027, 1, 1, 3, 0, 0, DateTimeKind.Utc)
            });
        ctx.SaveChanges();

        var trend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), new DashboardTrendQueryDTO { Year = 2026 }, CancellationToken.None);

        trend.Granularity.Should().Be("month");
        trend.Buckets.Should().HaveCount(12);
        trend.Buckets[0].Label.Should().Be("2026-01-01");
        trend.Buckets[0].Total.Should().Be(1);
        trend.Buckets[0].Open.Should().Be(1);
        trend.Buckets[0].Overdue.Should().Be(1);
        trend.Buckets[2].Label.Should().Be("2026-03-01");
        trend.Buckets[2].Total.Should().Be(1);
        trend.Buckets[2].Completed.Should().Be(1);
        // December stays empty: the 2027-01-01 row is no longer pulled inside the window.
        trend.Buckets[11].Label.Should().Be("2026-12-01");
        trend.Buckets[11].Total.Should().Be(0);
        trend.Buckets[11].Open.Should().Be(0);
        trend.Today.Should().Be(DashboardBusinessTime.Today());
    }

    [Fact]
    public async Task GetTrendAsync_MarksTodayBucketAsCurrent()
    {
        using var ctx = NewContext();
        var today = DashboardBusinessTime.Today();
        ctx.workOrders.Add(new WorkOrder
        {
            AccountId = 1,
            LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
            ScheduledDate = today.AddDays(-2).ToDateTime(new TimeOnly(12, 0))
        });
        ctx.SaveChanges();

        var query = new DashboardTrendQueryDTO
        {
            DateFrom = today.AddDays(-2),
            DateTo = today.AddDays(2)
        };
        var trend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), query, CancellationToken.None);

        trend.Today.Should().Be(today);
        trend.Buckets.Should().HaveCount(5);
        trend.Buckets.Count(bucket => bucket.IsCurrent).Should().Be(1);
        trend.Buckets.Single(bucket => bucket.IsCurrent).Date.Should().Be(today);
        trend.Buckets[0].Total.Should().Be(1);
        trend.Buckets.Single(bucket => bucket.Date == today).Total.Should().Be(0);
    }

    [Fact]
    public async Task GetTrendAsync_DispatcherRoleAndTenantScopeMatchStats()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 2, 2, 12, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-2",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 2, 2, 12, 0, 0, DateTimeKind.Utc)
            },
            new WorkOrder
            {
                AccountId = 2,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = new DateTime(2026, 2, 2, 12, 0, 0, DateTimeKind.Utc)
            });
        ctx.SaveChanges();

        var query = new DashboardTrendQueryDTO
        {
            DateFrom = new DateOnly(2026, 2, 2),
            DateTo = new DateOnly(2026, 2, 3)
        };

        var dispatcherTrend = await NewService(ctx).GetTrendAsync(
            AccountUser(1, "dispatcher-1", "Dispatcher"), query, CancellationToken.None);

        dispatcherTrend.Buckets.Should().HaveCount(2);
        dispatcherTrend.Buckets[0].Total.Should().Be(1);
        dispatcherTrend.Buckets[1].Total.Should().Be(0);

        var adminTrend = await NewService(ctx).GetTrendAsync(
            AccountUser(1), query, CancellationToken.None);

        adminTrend.Buckets[0].Total.Should().Be(2);

        var otherAccountTrend = await NewService(ctx).GetTrendAsync(
            AccountUser(2), query, CancellationToken.None);

        otherAccountTrend.Buckets[0].Total.Should().Be(1);
    }
}