using Data.SeaHavenIndustries;
using FluentAssertions;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Implementation;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Implementation;
using SeaHaven.Services.Validation;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

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

    private static FollowUpService NewService(ApplicationDbContext ctx) =>
        new(new FollowUpDataService(ctx), new CreateFollowUpValidation(), new UpdateFollowUpValidation());

    private static FollowUps SeedFollowUp(ApplicationDbContext ctx, string reason, string status = "Open")
    {
        var f = new FollowUps
        {
            Reason = reason,
            ScheduleDate = new DateTime(2026, 8, 1),
            ScheduleStartTime = new TimeSpan(9, 0, 0),
            Status = status,
            createdby = "user-1",
            CreatedDate = DateTime.Now
        };
        ctx.FollowUps.Add(f);
        ctx.SaveChanges();
        return f;
    }

    [Fact]
    public async Task CreateOpenFollowUpAsync_ForcesOpenStatusAndPersistsFields()
    {
        using var ctx = NewContext();
        var service = NewService(ctx);

        var id = await service.CreateOpenFollowUpAsync(new FollowUpCreateRequestDTO
        {
            Reason = "Call back",
            ScheduleDate = new DateTime(2026, 9, 1),
            ScheduleStartTime = new TimeSpan(10, 30, 0),
            EmployeeId = 5,
            WorkOrderId = 7,
            AccountId = 9,
            LocationId = 11
        }, "user-9", CancellationToken.None);

        var entity = ctx.FollowUps.Single();
        entity.Id.Should().Be(id);
        entity.Status.Should().Be("Open");
        entity.Reason.Should().Be("Call back");
        entity.createdby.Should().Be("user-9");
        entity.EmployeeId.Should().Be(5);
        entity.WorkOrderId.Should().Be(7);
        entity.CreatedDate.Should().NotBeNull();
    }

    [Fact]
    public async Task GetFollowUpListAsync_DefaultsToOpenAndMapsShape()
    {
        using var ctx = NewContext();
        SeedFollowUp(ctx, "Open one", "Open");
        SeedFollowUp(ctx, "Done one", "Completed");

        var page = await NewService(ctx).GetFollowUpListAsync(1, 12, "", null, CancellationToken.None);

        page.Items.Should().HaveCount(1);
        page.Items.Single().Reason.Should().Be("Open one");
        page.Items.Single().Status.Should().Be("Open");
        page.PageSize.Should().Be(12);
    }

    [Fact]
    public async Task GetFollowUpDetailAsync_MapsRelatedNamesAndResolvesCreator()
    {
        using var ctx = NewContext();
        var employee = new Employee { FirstName = "Sara", LastName = "Lee" };
        ctx.Employees.Add(employee);
        ctx.SaveChanges();

        var account = new Accounts { Name = "Acme" };
        ctx.Accounts.Add(account);
        ctx.SaveChanges();

        var user = new ApplicationUser { Id = "user-1", FirstName = "Creator", LastName = "One", UserName = "cone" };
        var fu = new FollowUps
        {
            Reason = "Detail",
            ScheduleDate = new DateTime(2026, 8, 2),
            ScheduleStartTime = new TimeSpan(8, 0, 0),
            Status = "Open",
            EmployeeId = employee.Id,
            AccountId = account.Id,
            createdby = "user-1",
            CreatedDate = DateTime.Now
        };
        ctx.Users.Add(user);
        ctx.FollowUps.Add(fu);
        ctx.SaveChanges();

        var detail = await NewService(ctx).GetFollowUpDetailAsync(fu.Id, CancellationToken.None);

        detail.Should().NotBeNull();
        detail!.AssignedTo.Should().Be("Sara Lee");
        detail.AccountName.Should().Be("Acme");
        detail.CreatedById.Should().Be("user-1");
        detail.CreatedByName.Should().Be("Creator One");
    }

    [Fact]
    public async Task UpdateFollowUpFieldsAsync_UpdatesAndThrowsWhenMissing()
    {
        using var ctx = NewContext();
        var existing = SeedFollowUp(ctx, "Old reason");

        await NewService(ctx).UpdateFollowUpFieldsAsync(existing.Id, new FollowUpUpdateRequestDTO
        {
            Id = existing.Id,
            Reason = "New reason",
            ScheduleDate = new DateTime(2026, 10, 1),
            ScheduleStartTime = new TimeSpan(11, 0, 0)
        }, CancellationToken.None);

        var row = ctx.FollowUps.Single();
        row.Reason.Should().Be("New reason");

        var act = () => NewService(ctx).UpdateFollowUpFieldsAsync(existing.Id + 999, new FollowUpUpdateRequestDTO { Id = existing.Id + 999 }, CancellationToken.None);
        await act.Should().ThrowAsync<KeyNotFoundException>();
    }

    [Fact]
    public async Task SetFollowUpStatusAsync_TogglesStatusAndReturnsFalseWhenMissing()
    {
        using var ctx = NewContext();
        var existing = SeedFollowUp(ctx, "To complete");

        (await NewService(ctx).SetFollowUpStatusAsync(existing.Id, "Completed", CancellationToken.None)).Should().BeTrue();
        ctx.FollowUps.Single().Status.Should().Be("Completed");
        (await NewService(ctx).SetFollowUpStatusAsync(existing.Id + 999, "Completed", CancellationToken.None)).Should().BeFalse();
    }

    [Fact]
    public async Task RemoveFollowUpAsync_RemovesAndReturnsFalseWhenMissing()
    {
        using var ctx = NewContext();
        var existing = SeedFollowUp(ctx, "Gone");

        (await NewService(ctx).RemoveFollowUpAsync(existing.Id, CancellationToken.None)).Should().BeTrue();
        (await NewService(ctx).RemoveFollowUpAsync(existing.Id, CancellationToken.None)).Should().BeFalse();
        ctx.FollowUps.Should().BeEmpty();
    }
}