using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using PowderCoating.Core.Entities;
using PowderCoating.Core.Enums;
using PowderCoating.Infrastructure.Data;
using PowderCoating.Web.Controllers;

namespace PowderCoating.UnitTests;

public class UsageQuotaControllerTests
{
    [Fact]
    public async Task Index_UsesOverridesAndCountsOnlyActiveResources()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 1, maxUsers: 10, maxJobs: 5, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10);
        SeedCompany(context, companyId: 1, plan: 1, maxUsersOverride: 5);
        SeedLookupRows(context, companyId: 1);

        context.Users.AddRange(
            CreateUser("u1", 1),
            CreateUser("u2", 1),
            CreateUser("u3", 1),
            CreateUser("u4", 1));

        context.Customers.AddRange(
            new Customer { Id = 1, CompanyId = 1, CompanyName = "Cust 1" },
            new Customer { Id = 2, CompanyId = 1, CompanyName = "Cust 2" });

        context.Jobs.AddRange(
            new Job { Id = 1, CompanyId = 1, CustomerId = 1, Description = "Active", JobNumber = "JOB-1", JobStatusId = 10, JobPriorityId = 1 },
            new Job { Id = 2, CompanyId = 1, CustomerId = 1, Description = "Done", JobNumber = "JOB-2", JobStatusId = 11, JobPriorityId = 1 });

        context.Quotes.AddRange(
            new Quote { Id = 1, CompanyId = 1, QuoteNumber = "Q-1", QuoteStatusId = 10 },
            new Quote { Id = 2, CompanyId = 1, QuoteNumber = "Q-2", QuoteStatusId = 11 },
            new Quote { Id = 3, CompanyId = 1, QuoteNumber = "Q-3", QuoteStatusId = 12 });

        context.CatalogItems.AddRange(
            new CatalogItem { Id = 1, CompanyId = 1, Name = "Wheel", CategoryId = 1 },
            new CatalogItem { Id = 2, CompanyId = 1, Name = "Frame", CategoryId = 1 });

        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var result = await controller.Index(null, null, null, null);

        var view = Assert.IsType<ViewResult>(result);
        var row = Assert.Single(Assert.IsAssignableFrom<List<UsageRow>>(view.Model));
        Assert.Equal(4, row.Users);
        Assert.Equal(5, row.MaxUsers);
        Assert.Equal(1, row.ActiveJobs);
        Assert.Equal(1, row.ActiveQuotes);
        Assert.Equal(2, row.Customers);
        Assert.Equal(2, row.CatalogItems);
        Assert.True(row.IsNearLimit);
        Assert.False(row.IsAtLimit);
        Assert.Equal(0, controller.ViewBag.AtLimitCount);
        Assert.Equal(1, controller.ViewBag.NearLimitCount);
    }

    [Fact]
    public async Task Index_ForCompedCompany_ReturnsUnlimitedLimitsWithoutFlags()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 2, maxUsers: 1, maxJobs: 1, maxCustomers: 1, maxQuotes: 1, maxCatalogItems: 1);
        SeedCompany(context, companyId: 2, plan: 2, isComped: true);
        SeedLookupRows(context, companyId: 2);

        context.Users.AddRange(CreateUser("u1", 2), CreateUser("u2", 2));
        context.Customers.Add(new Customer { Id = 10, CompanyId = 2, CompanyName = "Comped Customer" });
        context.Jobs.Add(new Job { Id = 10, CompanyId = 2, CustomerId = 10, Description = "Active", JobNumber = "JOB-C", JobStatusId = 20, JobPriorityId = 2 });
        context.Quotes.Add(new Quote { Id = 10, CompanyId = 2, QuoteNumber = "Q-C", QuoteStatusId = 20 });
        context.CatalogItems.Add(new CatalogItem { Id = 10, CompanyId = 2, Name = "Rack", CategoryId = 1 });
        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var result = await controller.Index(null, null, null, null);

        var view = Assert.IsType<ViewResult>(result);
        var row = Assert.Single(Assert.IsAssignableFrom<List<UsageRow>>(view.Model));
        Assert.True(row.IsComped);
        Assert.Equal(-1, row.MaxUsers);
        Assert.Equal(-1, row.MaxActiveJobs);
        Assert.Equal(-1, row.MaxCustomers);
        Assert.Equal(-1, row.MaxActiveQuotes);
        Assert.Equal(-1, row.MaxCatalogItems);
        Assert.False(row.IsNearLimit);
        Assert.False(row.IsAtLimit);
    }

    [Fact]
    public async Task Index_ConcernFilters_SeparateNearAndAtLimitRows()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 3, maxUsers: 5, maxJobs: 5, maxCustomers: 5, maxQuotes: 5, maxCatalogItems: 5);
        SeedCompany(context, companyId: 3, plan: 3, companyName: "Near Co");
        SeedCompany(context, companyId: 4, plan: 3, companyName: "At Co");
        SeedCompany(context, companyId: 5, plan: 3, companyName: "Safe Co");
        SeedLookupRows(context, 3);
        SeedLookupRows(context, 4);
        SeedLookupRows(context, 5);

        context.Users.AddRange(
            CreateUser("n1", 3), CreateUser("n2", 3), CreateUser("n3", 3), CreateUser("n4", 3),
            CreateUser("a1", 4), CreateUser("a2", 4), CreateUser("a3", 4), CreateUser("a4", 4), CreateUser("a5", 4),
            CreateUser("s1", 5));
        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var limitResult = await controller.Index(null, null, null, "limit");
        var limitRows = Assert.IsAssignableFrom<List<UsageRow>>(Assert.IsType<ViewResult>(limitResult).Model);
        Assert.Equal(2, limitRows.Count);
        Assert.Contains(limitRows, r => r.CompanyName == "Near Co" && r.IsNearLimit);
        Assert.Contains(limitRows, r => r.CompanyName == "At Co" && r.IsAtLimit);

        var atLimitResult = await controller.Index(null, null, null, "atlimit");
        var atLimitRows = Assert.IsAssignableFrom<List<UsageRow>>(Assert.IsType<ViewResult>(atLimitResult).Model);
        var atLimitRow = Assert.Single(atLimitRows);
        Assert.Equal("At Co", atLimitRow.CompanyName);
        Assert.True(atLimitRow.IsAtLimit);
    }

    [Fact]
    public async Task Index_AppliesSearchStatusAndPlanFilters()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 6, maxUsers: 10, maxJobs: 10, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10, displayName: "Plan Six");
        SeedPlan(context, plan: 7, maxUsers: 10, maxJobs: 10, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10, displayName: "Plan Seven");
        SeedCompany(context, companyId: 6, plan: 6, companyName: "Acme Powder", status: SubscriptionStatus.Active);
        SeedCompany(context, companyId: 7, plan: 6, companyName: "Beta Powder", status: SubscriptionStatus.Expired);
        SeedCompany(context, companyId: 8, plan: 7, companyName: "Acme East", status: SubscriptionStatus.Active);
        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var result = await controller.Index("Acme", nameof(SubscriptionStatus.Active), "6", null);

        var view = Assert.IsType<ViewResult>(result);
        var row = Assert.Single(Assert.IsAssignableFrom<List<UsageRow>>(view.Model));
        Assert.Equal("Acme Powder", row.CompanyName);
        Assert.Equal(nameof(SubscriptionStatus.Active), controller.ViewBag.StatusFilter);
        Assert.Equal("6", controller.ViewBag.PlanFilter);
    }

    [Fact]
    public async Task Index_WhenUsageIsExactlyEightyPercent_MarksRowNearLimit()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 8, maxUsers: 5, maxJobs: 10, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10);
        SeedCompany(context, companyId: 9, plan: 8, companyName: "Threshold Co");
        await context.SaveChangesAsync();

        context.Users.AddRange(
            CreateUser("t1", 9),
            CreateUser("t2", 9),
            CreateUser("t3", 9),
            CreateUser("t4", 9));
        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var result = await controller.Index(null, null, null, null);

        var view = Assert.IsType<ViewResult>(result);
        var row = Assert.Single(Assert.IsAssignableFrom<List<UsageRow>>(view.Model));
        Assert.Equal(4, row.Users);
        Assert.Equal(5, row.MaxUsers);
        Assert.True(row.IsNearLimit);
        Assert.False(row.IsAtLimit);
    }

    [Fact]
    public async Task Index_WhenFiltersAreInvalid_IgnoresThem()
    {
        await using var context = CreateContext();
        SeedPlan(context, plan: 9, maxUsers: 10, maxJobs: 10, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10);
        SeedPlan(context, plan: 10, maxUsers: 10, maxJobs: 10, maxCustomers: 10, maxQuotes: 10, maxCatalogItems: 10);
        SeedCompany(context, companyId: 10, plan: 9, companyName: "Alpha Co", status: SubscriptionStatus.Active);
        SeedCompany(context, companyId: 11, plan: 10, companyName: "Beta Co", status: SubscriptionStatus.Expired);
        await context.SaveChangesAsync();

        var controller = new UsageQuotaController(context);

        var result = await controller.Index(null, "NotARealStatus", "not-a-plan", null);

        var view = Assert.IsType<ViewResult>(result);
        var rows = Assert.IsAssignableFrom<List<UsageRow>>(view.Model);
        Assert.Equal(2, rows.Count);
        Assert.Equal(2, controller.ViewBag.TotalCount);
        Assert.Equal("NotARealStatus", controller.ViewBag.StatusFilter);
        Assert.Equal("not-a-plan", controller.ViewBag.PlanFilter);
    }

    private static ApplicationUser CreateUser(string id, int companyId)
    {
        return new ApplicationUser
        {
            Id = id,
            CompanyId = companyId,
            UserName = $"{id}@example.com",
            Email = $"{id}@example.com",
            FirstName = "Test",
            LastName = "User"
        };
    }

    private static void SeedPlan(
        ApplicationDbContext context,
        int plan,
        int maxUsers,
        int maxJobs,
        int maxCustomers,
        int maxQuotes,
        int maxCatalogItems,
        string? displayName = null)
    {
        context.SubscriptionPlanConfigs.Add(new SubscriptionPlanConfig
        {
            Id = plan,
            CompanyId = 0,
            Plan = plan,
            DisplayName = displayName ?? $"Plan {plan}",
            SortOrder = plan,
            IsActive = true,
            MaxUsers = maxUsers,
            MaxActiveJobs = maxJobs,
            MaxCustomers = maxCustomers,
            MaxQuotes = maxQuotes,
            MaxCatalogItems = maxCatalogItems
        });
    }

    private static void SeedCompany(
        ApplicationDbContext context,
        int companyId,
        int plan,
        string? companyName = null,
        SubscriptionStatus status = SubscriptionStatus.Active,
        bool isComped = false,
        int? maxUsersOverride = null)
    {
        context.Companies.Add(new Company
        {
            Id = companyId,
            CompanyId = companyId,
            CompanyName = companyName ?? $"Company {companyId}",
            PrimaryContactName = "Owner",
            PrimaryContactEmail = $"owner{companyId}@example.com",
            SubscriptionPlan = plan,
            SubscriptionStatus = status,
            IsComped = isComped,
            MaxUsersOverride = maxUsersOverride,
            IsActive = true
        });
    }

    private static void SeedLookupRows(ApplicationDbContext context, int companyId)
    {
        context.JobPriorityLookups.Add(new JobPriorityLookup
        {
            Id = companyId,
            CompanyId = companyId,
            PriorityCode = "NORMAL",
            DisplayName = "Normal",
            DisplayOrder = 1
        });

        context.JobStatusLookups.AddRange(
            new JobStatusLookup
            {
                Id = companyId * 10,
                CompanyId = companyId,
                StatusCode = "ACTIVE",
                DisplayName = "Active",
                DisplayOrder = 1,
                IsTerminalStatus = false
            },
            new JobStatusLookup
            {
                Id = companyId * 10 + 1,
                CompanyId = companyId,
                StatusCode = "DONE",
                DisplayName = "Done",
                DisplayOrder = 2,
                IsTerminalStatus = true
            });

        context.QuoteStatusLookups.AddRange(
            new QuoteStatusLookup
            {
                Id = companyId * 10,
                CompanyId = companyId,
                StatusCode = "PENDING",
                DisplayName = "Pending",
                DisplayOrder = 1
            },
            new QuoteStatusLookup
            {
                Id = companyId * 10 + 1,
                CompanyId = companyId,
                StatusCode = "REJECTED",
                DisplayName = "Rejected",
                DisplayOrder = 2,
                IsRejectedStatus = true
            },
            new QuoteStatusLookup
            {
                Id = companyId * 10 + 2,
                CompanyId = companyId,
                StatusCode = "CONVERTED",
                DisplayName = "Converted",
                DisplayOrder = 3,
                IsConvertedStatus = true
            });
    }

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

        return new ApplicationDbContext(options);
    }
}