using Data.SeaHavenIndustries;
using Data.SeaHavenIndustries.Enums;
using SeaHaven.Services.Helpers;

namespace SeaHavenIndustries.Tests;

public class WorkOrderDerivedFieldsTests
{
    private static readonly DateOnly Today = DateOnly.FromDateTime(DateTime.UtcNow);
    private static readonly DateTime Past = DateTime.UtcNow.Date.AddDays(-2);
    private static readonly DateTime Future = DateTime.UtcNow.Date.AddDays(3);
    private static readonly DateTime TodayDate = DateTime.UtcNow.Date;

    [Fact]
    public void IsPastDue_WhenSchedulePastAndDueFuture_ReturnsTrue()
    {
        var wo = new WorkOrder
        {
            DueDate = Future,
            ScheduledDate = Past,
            LifecycleStatus = LifecycleStatus.Scheduled
        };

        Assert.True(WorkOrderDerivedFields.IsPastDue(wo, Today));
        Assert.True(WorkOrderDerivedFields.IsPastDue(wo.ScheduledDate, wo.LifecycleStatus));
    }

    [Fact]
    public void IsPastDue_WhenScheduleFutureAndDuePast_ReturnsFalse()
    {
        var wo = new WorkOrder
        {
            DueDate = Past,
            ScheduledDate = Future,
            LifecycleStatus = LifecycleStatus.Scheduled
        };

        Assert.False(WorkOrderDerivedFields.IsPastDue(wo, Today));
        Assert.False(WorkOrderDerivedFields.IsPastDue(wo.ScheduledDate, wo.LifecycleStatus));
    }

    [Fact]
    public void IsPastDue_WhenScheduledDateNull_ReturnsFalse()
    {
        var wo = new WorkOrder
        {
            DueDate = Past,
            ScheduledDate = null,
            LifecycleStatus = LifecycleStatus.Scheduled
        };

        Assert.False(WorkOrderDerivedFields.IsPastDue(wo, Today));
        Assert.False(WorkOrderDerivedFields.IsPastDue(null, LifecycleStatus.Scheduled));
    }

    [Fact]
    public void IsPastDue_WhenScheduleEqualsToday_ReturnsFalse()
    {
        var wo = new WorkOrder
        {
            DueDate = Past,
            ScheduledDate = TodayDate,
            LifecycleStatus = LifecycleStatus.Scheduled
        };

        Assert.False(WorkOrderDerivedFields.IsPastDue(wo, Today));
    }

    [Theory]
    [InlineData(LifecycleStatus.Completed)]
    [InlineData(LifecycleStatus.Canceled)]
    public void IsPastDue_WhenTerminal_ReturnsFalse(LifecycleStatus status)
    {
        var wo = new WorkOrder
        {
            DueDate = Past,
            ScheduledDate = Past,
            LifecycleStatus = status
        };

        Assert.False(WorkOrderDerivedFields.IsPastDue(wo, Today));
        Assert.False(WorkOrderDerivedFields.IsPastDue(Past, status));
    }

    [Fact]
    public void ApplyAutoSchedule_WhenDateWithoutAssignee_PromotesToScheduled()
    {
        var wo = new WorkOrder
        {
            LifecycleStatus = LifecycleStatus.Incomplete,
            ScheduledDate = new DateTime(2026, 6, 25)
        };

        Assert.True(WorkOrderDerivedFields.ApplyAutoScheduleIfEligible(wo));
        Assert.Equal(LifecycleStatus.Scheduled, wo.LifecycleStatus);
    }

    [Fact]
    public void ApplyLifecycleFromSchedule_PendingWithDate_PromotesToScheduled()
    {
        var wo = new WorkOrder
        {
            LifecycleStatus = LifecycleStatus.Pending,
            ScheduledDate = new DateTime(2026, 6, 25)
        };

        var changes = WorkOrderDerivedFields.ApplyLifecycleFromSchedule(wo);
        Assert.Equal(LifecycleStatus.Scheduled, wo.LifecycleStatus);
        Assert.Single(changes);
        Assert.Equal(AuditActionType.StatusChanged, changes[0].Action);
    }

    [Fact]
    public void ApplyLifecycleFromSchedule_ScheduledWithoutDate_DemotesToPending()
    {
        var wo = new WorkOrder
        {
            LifecycleStatus = LifecycleStatus.Scheduled,
            ScheduledDate = null
        };

        var changes = WorkOrderDerivedFields.ApplyLifecycleFromSchedule(wo);
        Assert.Equal(LifecycleStatus.Pending, wo.LifecycleStatus);
        Assert.Single(changes);
        Assert.Equal(LifecycleStatus.Pending.ToString(), changes[0].NewValue);
    }

    [Fact]
    public void ApplyAutoSchedule_WeekOnly_DoesNotPromote()
    {
        var wo = new WorkOrder
        {
            LifecycleStatus = LifecycleStatus.Incomplete,
            ScheduledDate = new DateTime(2026, 6, 25),
            ScheduleWeekOnly = true,
            TargetWeek = new DateOnly(2026, 6, 22)
        };

        Assert.False(WorkOrderDerivedFields.ApplyAutoScheduleIfEligible(wo));
        Assert.Equal(LifecycleStatus.Incomplete, wo.LifecycleStatus);
    }

    [Fact]
    public void ApplyLifecycleFromSchedule_InProgress_UnchangedWhenDateCleared()
    {
        var wo = new WorkOrder
        {
            LifecycleStatus = LifecycleStatus.InProgress,
            ScheduledDate = null
        };

        Assert.Empty(WorkOrderDerivedFields.ApplyLifecycleFromSchedule(wo));
        Assert.Equal(LifecycleStatus.InProgress, wo.LifecycleStatus);
    }

    [Fact]
    public void SetInitialLifecycleStatus_NewWo_StartsIncompleteThenAutoSchedules()
    {
        var wo = new WorkOrder
        {
            ScheduledDate = new DateTime(2026, 6, 25)
        };

        WorkOrderDerivedFields.SetInitialLifecycleStatus(wo);
        Assert.Equal(LifecycleStatus.Scheduled, wo.LifecycleStatus);
    }
}