using System.Net;
using HrynCo.NotificationService.DAL.Abstract.Repositories;
using HrynCo.NotificationService.DAL.Abstract.Templates;
using HrynCo.NotificationService.DAL.EF;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.Extensions.DependencyInjection;

namespace HrynCo.NotificationService.Web.IntegrationTests;

public sealed class PushTemplateEditorTests(TemplateDatabaseFixture fixture) : IClassFixture<TemplateDatabaseFixture>
{
    [Fact]
    public async Task PushOnlyKeyCanAcquireEmailWithoutChangingPush_AndListHasOneRow()
    {
        var connection = await fixture.CreateDatabaseAsync();
        await using var app = new TemplateWebApplicationFactory(connection);
        using var client = app.CreateClient(new WebApplicationFactoryClientOptions { AllowAutoRedirect = false });
        var service = await ReadServiceAsync(connection);
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/create"));
        fields["Key"] = "PushOnly";
        SetPush(fields, "en", "Hello {{Name}}", "A shared item changed.");
        fields["VariablesJson"] = "[{\"name\":\"Name\",\"required\":true}]";
        Assert.Equal(HttpStatusCode.Redirect, (await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(fields))).StatusCode);
        var missing = await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/email?key=PushOnly");
        Assert.Contains("Create Email Template", missing);
        var emailFields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/templates/create?templateKey=PushOnly"));
        Assert.Equal("PushOnly", emailFields["Key"]);
        Assert.Equal(HttpStatusCode.Redirect, (await client.PostAsync($"/admin/services/{service.Id}/templates/save", new FormUrlEncodedContent(emailFields))).StatusCode);
        using var provider = Provider(connection);
        using var scope = provider.CreateScope();
        var push = await scope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetAsync(service.Id, "PushOnly");
        Assert.Equal("Hello {{Name}}", Assert.Single(push!.Languages).Title);
        var email = await scope.ServiceProvider.GetRequiredService<IEmailTemplateDefinitionRepository>().GetDefinitionAsync(service.Id, "PushOnly");
        Assert.Empty(email!.Variables);
        var list = await client.GetStringAsync($"/admin/services/{service.Id}");
        Assert.Contains("<th scope=\"col\">Email</th>", list);
        Assert.Contains("<th scope=\"col\">Push</th>", list);
        Assert.Equal(1, System.Text.RegularExpressions.Regex.Matches(list, "<td>PushOnly</td>").Count);
    }

    [Theory]
    [InlineData("partial")]
    [InlineData("placeholder")]
    [InlineData("json")]
    [InlineData("catalog")]
    public async Task InvalidSaveRetainsInputAndDoesNotCreatePush(string scenario)
    {
        var connection = await fixture.CreateDatabaseAsync();
        await using var app = new TemplateWebApplicationFactory(connection);
        using var client = app.CreateClient();
        var service = await ReadServiceAsync(connection);
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/create"));
        fields["Key"] = "Invalid";
        SetPush(fields, "en", "Retained title", "Body");
        if (scenario == "partial") SetPush(fields, "en", "Retained title", "");
        if (scenario == "placeholder") SetPush(fields, "en", "Retained title", "{{Unknown}}");
        if (scenario == "json") fields["VariablesJson"] = "{}";
        if (scenario == "catalog") fields["Languages[0].LanguageCode"] = "foreign";
        var response = await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(fields));
        var html = await response.Content.ReadAsStringAsync();
        Assert.Contains("Retained title", html);
        Assert.Contains("validation-summary-errors", html);
        using var provider = Provider(connection);
        using var scope = provider.CreateScope();
        Assert.Null(await scope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetAsync(service.Id, "Invalid"));
    }

    [Fact]
    public async Task MissingTabHasNoSideEffects_StaleSaveIsRejected_AndFinalVersionCanBeRemoved()
    {
        var connection = await fixture.CreateDatabaseAsync();
        await using var app = new TemplateWebApplicationFactory(connection);
        using var client = app.CreateClient(new WebApplicationFactoryClientOptions { AllowAutoRedirect = false });
        var service = await ReadServiceAsync(connection);
        Assert.Contains("Create Push Template", await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/edit?key=Shared"));
        using (var provider = Provider(connection))
        using (var scope = provider.CreateScope())
            Assert.Empty(await scope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetDefinitionsAsync(service.Id));
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/create?key=Shared"));
        SetPush(fields, "uk", "Title", "Body");
        await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(fields));
        var saved = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/edit?key=Shared"));
        var stale = new Dictionary<string, string>(saved);
        SetPush(saved, "uk", "Updated title", "Updated body");
        Assert.Equal(HttpStatusCode.Redirect, (await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(saved))).StatusCode);
        SetPush(stale, "uk", "Retained stale input", "Body");
        var error = await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(stale));
        Assert.Contains("changed after you opened", await error.Content.ReadAsStringAsync());
        Assert.Contains("Retained stale input", await error.Content.ReadAsStringAsync());
        var current = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/edit?key=Shared"));
        SetPush(current, "uk", "", "");
        Assert.Equal(HttpStatusCode.Redirect, (await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(current))).StatusCode);
        using var finalProvider = Provider(connection);
        using var finalScope = finalProvider.CreateScope();
        Assert.Empty((await finalScope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetAsync(service.Id, "Shared"))!.Languages);
    }

    [Fact]
    public async Task ConfirmedPushDeletionKeepsEmail_AndPostRequiresAntiforgery()
    {
        var connection = await fixture.CreateDatabaseAsync();
        var service = await ReadServiceAsync(connection);
        using (var provider = Provider(connection))
        using (var scope = provider.CreateScope())
        {
            await scope.ServiceProvider.GetRequiredService<IEmailTemplateDefinitionRepository>().SaveDefinitionAsync(new EmailTemplateDefinition { ServiceName = service.Name, Key = "Shared" }, true);
            await scope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().SaveAsync(new PushTemplateDefinition { ServiceId = service.Id, Key = "Shared" }, true);
        }
        await using var app = new TemplateWebApplicationFactory(connection);
        using var client = app.CreateClient(new WebApplicationFactoryClientOptions { AllowAutoRedirect = false });
        var route = $"/admin/services/{service.Id}/push-templates/delete";
        Assert.Equal(HttpStatusCode.BadRequest, (await client.PostAsync(route, new FormUrlEncodedContent(new Dictionary<string, string> { ["Key"] = "Shared" }))).StatusCode);
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync(route + "?key=Shared"));
        fields["ConfirmDelete"] = "true";
        Assert.Equal(HttpStatusCode.Redirect, (await client.PostAsync(route, new FormUrlEncodedContent(fields))).StatusCode);
        using var readProvider = Provider(connection);
        using var readScope = readProvider.CreateScope();
        Assert.NotNull(await readScope.ServiceProvider.GetRequiredService<IEmailTemplateDefinitionRepository>().GetDefinitionAsync(service.Id, "Shared"));
        Assert.Null(await readScope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetAsync(service.Id, "Shared"));
    }

    private static ServiceProvider Provider(string connection) => new ServiceCollection().AddNotificationDataAccess(connection).BuildServiceProvider();

    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public async Task LocalizedActionsRoundTripAndInvalidEditsRetainInput(bool invalid)
    {
        var connection = await fixture.CreateDatabaseAsync();
        await using var app = new TemplateWebApplicationFactory(connection);
        using var client = app.CreateClient(new WebApplicationFactoryClientOptions { AllowAutoRedirect = false });
        var service = await ReadServiceAsync(connection);
        var fields = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/create"));
        fields["Key"] = "WithButtons";
        SetPush(fields, "uk", "Потребою поділилися", "Перегляньте деталі");
        var codeField = fields.Single(p => p.Key.EndsWith(".LanguageCode") && p.Value == "uk").Key;
        var actionField = codeField[..^"LanguageCode".Length] + "ActionsJson";
        fields[actionField] = invalid ? "{\"buttons\":null}" : "{\"defaultAction\":\"openNeed\",\"buttons\":[{\"action\":\"openNeed\",\"label\":\"Переглянути\"}]}";
        var response = await client.PostAsync($"/admin/services/{service.Id}/push-templates/save", new FormUrlEncodedContent(fields));
        using var provider = Provider(connection);
        using var scope = provider.CreateScope();
        var saved = await scope.ServiceProvider.GetRequiredService<IPushTemplateDefinitionRepository>().GetAsync(service.Id, "WithButtons");
        if (invalid)
        {
            Assert.Null(saved);
            Assert.Contains("validation-summary-errors", await response.Content.ReadAsStringAsync());
            Assert.Equal(fields[actionField], TemplateEditorTestFields.Read(await response.Content.ReadAsStringAsync())[actionField].Trim());
            return;
        }
        Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
        var actions = PushTemplateActionValidation.Parse(Assert.Single(saved!.Languages).ActionsJson);
        Assert.Equal("openNeed", actions.DefaultAction);
        Assert.Equal("Переглянути", Assert.Single(actions.Buttons).Label);
        var reloaded = TemplateEditorTestFields.Read(await client.GetStringAsync($"/admin/services/{service.Id}/push-templates/edit?key=WithButtons"));
        var reloadedCodeField = reloaded.Single(p => p.Key.EndsWith(".LanguageCode") && p.Value == "uk").Key;
        Assert.Equal("openNeed", PushTemplateActionValidation.Parse(reloaded[reloadedCodeField[..^"LanguageCode".Length] + "ActionsJson"]).DefaultAction);
    }

    private static async Task<NotificationServiceInfo> ReadServiceAsync(string connection)
    {
        using var provider = Provider(connection);
        using var scope = provider.CreateScope();
        return (await scope.ServiceProvider.GetRequiredService<INotificationServiceRepository>().GetByNameAsync("TestService"))!;
    }

    private static void SetPush(Dictionary<string, string> fields, string code, string title, string body)
    {
        var codeField = fields.Single(p => p.Key.EndsWith(".LanguageCode") && p.Value == code).Key;
        var prefix = codeField[..^"LanguageCode".Length];
        fields[prefix + "Title"] = title;
        fields[prefix + "Body"] = body;
    }
}