using System.Net;
using HrynCo.NotificationService.DAL.Abstract.Providers;
using HrynCo.NotificationService.DAL.Abstract.Repositories;
using HrynCo.NotificationService.DAL.EF;
using Microsoft.Extensions.DependencyInjection;

namespace HrynCo.NotificationService.Web.IntegrationTests;

public sealed class AdminSmtpSaveTests(TemplateDatabaseFixture fixture) : IClassFixture<TemplateDatabaseFixture>
{
    [Fact]
    public async Task BlankPasswordKeepsSavedValueWhenOnlySenderChanges()
    {
        await using var context = await DefinitionApiTestContext.CreateAsync(fixture);
        var channel = await SeedChannel(context);
        using var client = context.App.CreateClient(new() { AllowAutoRedirect = false });
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/channels/{channel.Id}"));
        fields["ServiceId"] = context.ServiceId.ToString();
        fields["UseSsl"] = "true";
        fields["Password"] = "";
        fields["FromName"] = "Updated sender";

        var response = await client.PostAsync("/admin/channels/save", new FormUrlEncodedContent(fields));

        Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
        var saved = await ReadSettings(context, channel.Id);
        Assert.Equal("saved-test-secret", saved.Password);
        Assert.Equal("Updated sender", saved.FromName);
    }

    [Theory]
    [InlineData("Host", "other.example.invalid")]
    [InlineData("Port", "2525")]
    [InlineData("Username", "other-user")]
    [InlineData("UseSsl", "false")]
    public async Task ChangedConnectionWithBlankPasswordIsRejected(string field, string value)
    {
        await using var context = await DefinitionApiTestContext.CreateAsync(fixture);
        var channel = await SeedChannel(context);
        using var client = context.App.CreateClient(new() { AllowAutoRedirect = false });
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/channels/{channel.Id}"));
        fields["ServiceId"] = context.ServiceId.ToString();
        fields["UseSsl"] = "true";
        fields["Password"] = "";
        fields[field] = value;

        var response = await client.PostAsync("/admin/channels/save", new FormUrlEncodedContent(fields));
        var html = await response.Content.ReadAsStringAsync();

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        Assert.Contains("Enter the password to save changed SMTP connection settings.", html);
        Assert.DoesNotContain("saved-test-secret", html);
        var saved = await ReadSettings(context, channel.Id);
        Assert.Equal("saved-test-secret", saved.Password);
        Assert.Equal("smtp.example.invalid", saved.Host);
    }

    [Fact]
    public async Task ExplicitPasswordCanReplaceSavedValue()
    {
        await using var context = await DefinitionApiTestContext.CreateAsync(fixture);
        var channel = await SeedChannel(context);
        using var client = context.App.CreateClient(new() { AllowAutoRedirect = false });
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/channels/{channel.Id}"));
        fields["ServiceId"] = context.ServiceId.ToString();
        fields["UseSsl"] = "true";
        fields["Password"] = "replacement-test-secret";
        fields["Host"] = "other.example.invalid";

        var response = await client.PostAsync("/admin/channels/save", new FormUrlEncodedContent(fields));

        Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
        var saved = await ReadSettings(context, channel.Id);
        Assert.Equal("replacement-test-secret", saved.Password);
        Assert.Equal("other.example.invalid", saved.Host);
    }

    [Fact]
    public async Task NewChannelStillRequiresPassword()
    {
        await using var context = await DefinitionApiTestContext.CreateAsync(fixture);
        using var client = context.App.CreateClient(new() { AllowAutoRedirect = false });
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync("/admin/channels/create"));
        fields["ServiceId"] = context.ServiceId.ToString();
        fields["Host"] = "smtp.example.invalid";
        fields["Username"] = "test-user";
        fields["FromEmail"] = "sender@example.invalid";
        fields["FromName"] = "Sender";
        fields["Password"] = "";

        var response = await client.PostAsync("/admin/channels/save", new FormUrlEncodedContent(fields));

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        Assert.Contains("The Password field is required.", await response.Content.ReadAsStringAsync());
    }

    [Fact]
    public async Task InvalidFormDoesNotRenderEnteredPassword()
    {
        await using var context = await DefinitionApiTestContext.CreateAsync(fixture);
        var channel = await SeedChannel(context);
        using var client = context.App.CreateClient(new() { AllowAutoRedirect = false });
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/channels/{channel.Id}"));
        fields["Password"] = "replacement-test-secret";
        fields["FromEmail"] = "invalid-address";

        var response = await client.PostAsync("/admin/channels/save", new FormUrlEncodedContent(fields));
        var html = await response.Content.ReadAsStringAsync();

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        Assert.DoesNotContain("replacement-test-secret", html);
        Assert.Equal("saved-test-secret", (await ReadSettings(context, channel.Id)).Password);
    }

    private static async Task<EmailChannel> SeedChannel(DefinitionApiTestContext context)
    {
        using var scope = context.App.Services.CreateScope();
        var channel = new EmailChannel
        {
            ServiceId = context.ServiceId, EmailChannelType = EmailChannelType.Smtp,
            Settings = new SmtpChannelSettings
            {
                Host = "smtp.example.invalid", Port = 587, Username = "test-user",
                Password = "saved-test-secret", UseSsl = true,
                FromEmail = "sender@example.invalid", FromName = "Original sender"
            }
        };
        await scope.ServiceProvider.GetRequiredService<IEmailChannelRepository>().AddAsync(channel);
        await scope.ServiceProvider.GetRequiredService<NotificationDbContext>().SaveChangesAsync();
        return channel;
    }

    private static async Task<SmtpChannelSettings> ReadSettings(DefinitionApiTestContext context, Guid id)
    {
        using var scope = context.App.Services.CreateScope();
        var channel = await scope.ServiceProvider.GetRequiredService<IEmailChannelRepository>().GetByIdAsync(id);
        return Assert.IsType<SmtpChannelSettings>(channel?.Settings);
    }
}