using System.Net;
using MeterVault.App;
using MeterVault.Core.Domain;
using Microsoft.AspNetCore.Localization;
using Microsoft.EntityFrameworkCore;

namespace MeterVault.Integration.Tests.Editor;

/// <summary>
/// The tariff and settings pages as the server prerenders them (D-37, D-52, D-57): a scoped tariff link lists what can
/// price that meter and nothing else, Bonus/Discount/Tax say they are not applied, and settings label raw retention as
/// not enforced, with the reason, beside the analysis data state.
/// </summary>
[Collection("Timescale")]
public sealed class AdminPagesRenderTests(TimescaleFixture fx) : IAsyncLifetime
{
    private short _type;
    private short _otherType;
    private int _meter;
    private readonly List<int> _tariffs = [];

    public async Task InitializeAsync()
    {
        await using var db = fx.CreateContext();
        var type = new EnergyType { Key = $"tariffs-{Guid.NewGuid():N}", DisplayName = "Tariff water", BaseUnit = "m3", DefaultMode = MeterMode.CumulativeCounter };
        var other = new EnergyType { Key = $"tariffs-{Guid.NewGuid():N}", DisplayName = "Tariff heat", BaseUnit = "kWh", DefaultMode = MeterMode.CumulativeCounter };
        db.EnergyTypes.AddRange(type, other);
        await db.SaveChangesAsync();
        _type = type.Id;
        _otherType = other.Id;

        var meter = new Meter { Name = "Tap meter", EnergyTypeId = _type, Mode = MeterMode.CumulativeCounter, Unit = "m3", Meta = "{}" };
        db.Meters.Add(meter);
        await db.SaveChangesAsync();
        _meter = meter.Id;

        Tariff[] tariffs =
        [
            Tariff(TariffScope.Meter, _meter, TariffComponent.UnitPrice, 1.2345, "EUR/m3"),
            Tariff(TariffScope.Meter, _meter, TariffComponent.UnitPrice, 1.9999, "EUR/m3", new DateOnly(2023, 1, 1)),
            Tariff(TariffScope.EnergyType, _type, TariffComponent.Bonus, 2.3456, "EUR"),
            Tariff(TariffScope.EnergyType, _otherType, TariffComponent.UnitPrice, 9.8765, "EUR/kWh"),
        ];
        db.Tariffs.AddRange(tariffs);
        await db.SaveChangesAsync();
        _tariffs.AddRange(tariffs.Select(t => t.Id));
    }

    public async Task DisposeAsync()
    {
        await using var db = fx.CreateContext();
        await db.Tariffs.Where(t => _tariffs.Contains(t.Id)).ExecuteDeleteAsync();
        await db.Meters.Where(m => m.Id == _meter).ExecuteDeleteAsync();
        await db.EnergyTypes.Where(t => t.Id == _type || t.Id == _otherType).ExecuteDeleteAsync();
    }

    [Fact]
    public async Task A_scoped_tariff_link_lists_what_can_price_the_meter()
    {
        using var factory = new MeterVaultAppFactory(fx.ConnectionString);
        using var client = factory.CreateClient();

        var scoped = WebUtility.HtmlDecode(await client.GetStringAsync(new Uri($"{TariffLinks.Path}?scope=meter&id={_meter}", UriKind.Relative)));
        Assert.Contains("Tariffs that can price Tap meter: its own, its energy type's and global ones.", scoped, StringComparison.Ordinal);
        Assert.Contains("1.2345", scoped, StringComparison.Ordinal);                // its own price
        Assert.Contains("2.3456", scoped, StringComparison.Ordinal);                // its type's bonus …
        Assert.Contains("Not applied yet", scoped, StringComparison.Ordinal);       // … which is not applied yet
        Assert.DoesNotContain("9.8765", scoped, StringComparison.Ordinal);          // another type's price is not listed
        Assert.Contains("Bonus, discount and tax tariffs are stored but not applied to costs yet.", scoped, StringComparison.Ordinal);

        // A-42: inside a component the newest validity is listed first, so the price in force is the top row.
        Assert.True(
            scoped.IndexOf("1.9999", StringComparison.Ordinal) < scoped.IndexOf("1.2345", StringComparison.Ordinal),
            "The 2023 price must be listed above the 2020 one.");

        var all = WebUtility.HtmlDecode(await client.GetStringAsync(new Uri(TariffLinks.Path, UriKind.Relative)));
        Assert.Contains("9.8765", all, StringComparison.Ordinal);
        Assert.DoesNotContain("Tariffs that can price", all, StringComparison.Ordinal);
        Assert.True(all.IndexOf("1.9999", StringComparison.Ordinal) < all.IndexOf("1.2345", StringComparison.Ordinal));

        // The deep link of a missing price renders; its dialog opens only once the page is interactive.
        var link = TariffLinks.New(TariffScope.Meter, _meter, TariffComponent.UnitPrice, new DateOnly(2027, 1, 1));
        (await client.GetAsync(new Uri(link, UriKind.Relative))).EnsureSuccessStatusCode();
    }

    [Fact]
    public async Task Settings_label_raw_retention_as_not_enforced_in_both_languages()
    {
        using var factory = new MeterVaultAppFactory(fx.ConnectionString);
        using var client = factory.CreateClient();

        var english = WebUtility.HtmlDecode(await client.GetStringAsync(new Uri("/admin/settings", UriKind.Relative)));
        Assert.Contains("Not enforced", english, StringComparison.Ordinal);
        Assert.Contains("Raw readings are kept indefinitely (configured: 1095 days).", english, StringComparison.Ordinal);
        Assert.Contains("Analysis data", english, StringComparison.Ordinal);
        Assert.Contains("Meters with current analysis data", english, StringComparison.Ordinal);
        Assert.DoesNotContain("could not be read", english, StringComparison.Ordinal);

        using var german = factory.CreateClient();
        german.DefaultRequestHeaders.Add(
            "Cookie",
            CookieRequestCultureProvider.DefaultCookieName + "="
            + Uri.EscapeDataString(CookieRequestCultureProvider.MakeCookieValue(new RequestCulture("de"))));
        var deutsch = WebUtility.HtmlDecode(await german.GetStringAsync(new Uri("/admin/settings", UriKind.Relative)));
        Assert.Contains("Nicht aktiv", deutsch, StringComparison.Ordinal);
        Assert.Contains("Auswertungsdaten", deutsch, StringComparison.Ordinal);
    }

    private static Tariff Tariff(TariffScope scope, int id, TariffComponent component, double value, string unit, DateOnly? from = null) =>
        new() { ScopeType = scope, ScopeId = id, Component = component, Value = value, Unit = unit, ValidFrom = from ?? new DateOnly(2020, 1, 1) };
}