using System.Text.Json;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using SVSim.Database;
using SVSim.Database.Enums;
using SVSim.Database.Models;
using SVSim.Database.Models.Config;
using SVSim.Database.Repositories.Card;
using SVSim.Database.Repositories.Collectibles;
using SVSim.Database.Services;
using SVSim.EmulatedEntrypoint.Services;
using SVSim.UnitTests.Infrastructure;

namespace SVSim.UnitTests.Services;

public class ViewerEntitlementsTests
{
    /// <summary>
    /// FreeplayConfig is in SVSim.Database so EnsureSeedDataAsync seeds a DB row with
    /// Enabled=false (ShippedDefaults). Since tier 1 (DB) wins, we mutate the seeded row
    /// to activate freeplay rather than relying on an IConfiguration override.
    /// </summary>
    private static void SetFreeplayEnabled(SVSimDbContext db, bool enabled, ulong currencyAmount = 99999, int cardCopies = 3)
    {
        var row = db.GameConfigs.First(s => s.SectionName == "Freeplay");
        var cfg = JsonSerializer.Deserialize<FreeplayConfig>(row.ValueJson)!;
        cfg.Enabled = enabled;
        cfg.CurrencyAmount = currencyAmount;
        cfg.CardCopies = cardCopies;
        row.ValueJson = JsonSerializer.Serialize(cfg);
        db.SaveChanges();
    }

    private static ViewerEntitlements Build(IServiceScope scope)
    {
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        return new ViewerEntitlements(
            new GameConfigService(db, new ConfigurationBuilder().Build()),
            new CardRepository(db),
            new CollectionRepository(db));
    }

    [Test]
    public async Task Freeplay_off_reflects_real_balance_and_ownership()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        // Freeplay is seeded as Enabled=false by default — no mutation needed.
        var viewer = await db.Viewers.Include(v => v.Cards).ThenInclude(c => c.Card).FirstAsync(v => v.Id == viewerId);
        viewer.Currency.Crystals = 7;

        var ent = Build(scope);

        Assert.That(ent.IsFreeplay, Is.False);
        Assert.That(ent.EffectiveBalance(viewer, SpendCurrency.Crystal), Is.EqualTo(7));
        Assert.That(ent.OwnsCard(viewer, 99_999_999L), Is.False);
        Assert.That(ent.OwnsCosmetic(viewer, CosmeticType.Skin, 99_999), Is.False);
    }

    [Test]
    public async Task Freeplay_on_inflates_main_currencies_but_not_spot_points()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        SetFreeplayEnabled(db, enabled: true, currencyAmount: 99999);
        var viewer = await db.Viewers.FirstAsync(v => v.Id == viewerId);
        viewer.Currency.SpotPoints = 5;

        var ent = Build(scope);

        Assert.That(ent.IsFreeplay, Is.True);
        Assert.That(ent.EffectiveBalance(viewer, SpendCurrency.Crystal), Is.EqualTo(99999));
        Assert.That(ent.EffectiveBalance(viewer, SpendCurrency.Rupee), Is.EqualTo(99999));
        Assert.That(ent.EffectiveBalance(viewer, SpendCurrency.RedEther), Is.EqualTo(99999));
        Assert.That(ent.EffectiveBalance(viewer, SpendCurrency.SpotPoint), Is.EqualTo(5),
            "spot points are not a freeplay-inflated currency");
    }

    [Test]
    public async Task Freeplay_on_treats_all_cards_and_cosmetics_as_owned()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        SetFreeplayEnabled(db, enabled: true);
        var viewer = await db.Viewers.Include(v => v.Cards).ThenInclude(c => c.Card).FirstAsync(v => v.Id == viewerId);

        var ent = Build(scope);

        Assert.That(ent.OwnsCard(viewer, 99_999_999L), Is.True);
        Assert.That(ent.OwnsCosmetic(viewer, CosmeticType.Skin, 99_999), Is.True);
    }
}