using Microsoft.EntityFrameworkCore;
using PowderCoating.Core.Entities;
using PowderCoating.Infrastructure.Data;
using PowderCoating.Infrastructure.Services;

namespace PowderCoating.UnitTests;

public class PlatformSettingsServiceTests
{
    [Fact]
    public async Task GetAsync_ReturnsStoredValue()
    {
        await using var context = CreateContext();
        context.PlatformSettings.Add(new PlatformSetting
        {
            Key = "BrandName",
            Value = "Powder Coating Pro"
        });
        await context.SaveChangesAsync();

        var service = new PlatformSettingsService(context);

        var value = await service.GetAsync("BrandName");

        Assert.Equal("Powder Coating Pro", value);
    }

    [Fact]
    public async Task GetAsync_WhenMissing_ReturnsNull()
    {
        await using var context = CreateContext();
        var service = new PlatformSettingsService(context);

        var value = await service.GetAsync("MissingKey");

        Assert.Null(value);
    }

    [Fact]
    public async Task SetAsync_WhenSettingExists_UpdatesValueAndAuditFields()
    {
        await using var context = CreateContext();
        context.PlatformSettings.Add(new PlatformSetting
        {
            Key = "TrialsEnabled",
            Value = "true",
            UpdatedBy = "old-user"
        });
        await context.SaveChangesAsync();

        var service = new PlatformSettingsService(context);

        await service.SetAsync("TrialsEnabled", "false", "superadmin@example.com");

        var setting = await context.PlatformSettings.SingleAsync();
        Assert.Equal("false", setting.Value);
        Assert.Equal("superadmin@example.com", setting.UpdatedBy);
        Assert.True(setting.UpdatedAt.HasValue);
    }

    [Fact]
    public async Task SetAsync_WhenSettingMissing_InsertsRow()
    {
        await using var context = CreateContext();
        var service = new PlatformSettingsService(context);

        await service.SetAsync("SupportEmail", "help@example.com", "setup");

        var setting = await context.PlatformSettings.SingleAsync();
        Assert.Equal("SupportEmail", setting.Key);
        Assert.Equal("help@example.com", setting.Value);
        Assert.Equal("setup", setting.UpdatedBy);
    }

    [Fact]
    public async Task GetAllAsync_OrdersByGroupThenKey()
    {
        await using var context = CreateContext();
        context.PlatformSettings.AddRange(
            new PlatformSetting { Key = "Zeta", GroupName = "Billing", Value = "1" },
            new PlatformSetting { Key = "Alpha", GroupName = "Billing", Value = "2" },
            new PlatformSetting { Key = "Bravo", GroupName = "Alerts", Value = "3" });
        await context.SaveChangesAsync();

        var service = new PlatformSettingsService(context);

        var settings = await service.GetAllAsync();

        Assert.Equal(new[] { "Bravo", "Alpha", "Zeta" }, settings.Select(s => s.Key).ToArray());
    }

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

        return new ApplicationDbContext(options);
    }
}