using System.Security.Claims;
using System.Text.Json;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using RadicadeServer;
using RadicadeServer.API.Config;
using RadicadeServer.DB;
using RadicadeServer.RecNet.Accounts.Local;
using RadicadeServer.RecNet.Auth;
using Xunit;

namespace RadicadeServer.Tests;

public class AccountOnboardingSettingsTests
{
    // Every key the 2023 title screen reads to decide which page of its own new-user flow to open.
    // They all have to be written, not just the ones this server checks itself: a key the client looks
    // for and cannot find makes it resume at a page it believes it already showed, and a true one skips
    // that page outright. This is the whole reason a brand-new account opens on "Welcome to Rec Room!".
    private static readonly string[] AccountCreationKeys =
    [
        "Recroom.AccountCreation.HasStarted",
        "Recroom.AccountCreation.HasChosenUsername",
        "Recroom.AccountCreation.HasCreatedPassword",
        "Recroom.AccountCreation.HasFinished",
        "Recroom.AccountCreation.FinishedAvatarCustomization",
        "Recroom.AccountCreation.AcceptedCodeOfConduct",
        "Recroom.AccountCreation.HasImportedFriends"
    ];

    [Fact]
    public void NewAccountSettings_LeaveOnboardingIncompleteAndRequireOrientation()
    {
        var settings = JsonSerializer.Deserialize<List<Setting>>(DBConfig.NewAccountSettings2023)!;
        string Value(string key) => settings.Single(setting => setting.Key == key).Value;

        foreach (var key in AccountCreationKeys)
            Assert.Equal("False", Value(key));

        Assert.Equal("0", Value("Recroom.OOBE"));
        Assert.Equal("1", Value("Radicade.NeedsOrientation"));
        Assert.DoesNotContain(settings, setting => setting.Key == "HAS_COMPLETED_ORIENTATION");
    }

    [Fact]
    public void AccountCreationInProgressSettings_ResumeAtThePageAfterWhatThePlayerSubmitted()
    {
        var settings = JsonSerializer.Deserialize<List<Setting>>(
            DBConfig.AccountCreationInProgressSettings2023(usernameChosen: true, passwordCreated: true))!;
        string Value(string key) => settings.Single(setting => setting.Key == key).Value;

        // An account the flow itself created: it started, the name and password are in, and the pages
        // the player has not reached yet (avatar, Code of Conduct, finished) are still open.
        Assert.Equal("True", Value("Recroom.AccountCreation.HasStarted"));
        Assert.Equal("True", Value("Recroom.AccountCreation.HasChosenUsername"));
        Assert.Equal("True", Value("Recroom.AccountCreation.HasCreatedPassword"));
        Assert.Equal("False", Value("Recroom.AccountCreation.HasFinished"));
        Assert.Equal("False", Value("Recroom.AccountCreation.FinishedAvatarCustomization"));
        Assert.Equal("False", Value("Recroom.AccountCreation.AcceptedCodeOfConduct"));
        Assert.Equal("1", Value("Radicade.NeedsOrientation"));

        // A create that carried neither: the client still has to ask for both.
        var bare = JsonSerializer.Deserialize<List<Setting>>(
            DBConfig.AccountCreationInProgressSettings2023(usernameChosen: false, passwordCreated: false))!;
        Assert.Equal("False", bare.Single(setting => setting.Key == "Recroom.AccountCreation.HasChosenUsername").Value);
        Assert.Equal("False", bare.Single(setting => setting.Key == "Recroom.AccountCreation.HasCreatedPassword").Value);
    }

    [Fact]
    public void Regular2023DefaultSettings_DoNotForceNewAccountOnboarding()
    {
        var settings = JsonSerializer.Deserialize<List<Setting>>(DBConfig.DefaultSettings2023)!;

        Assert.DoesNotContain(settings, setting => setting.Key.StartsWith("Recroom.AccountCreation.", StringComparison.Ordinal));
        Assert.DoesNotContain(settings, setting => setting.Key == "Radicade.NeedsOrientation");
        Assert.Contains(settings, setting => setting.Key == "HAS_COMPLETED_ORIENTATION" && setting.Value == "True");
    }

    [Fact]
    public async Task CannotMarkOnboardingFinishedUntilPasswordBirthdayAndCocAreSaved()
    {
        await using var db = CreateDb();
        db.Profiles.Add(new Profile { accountId = 2, username = "NewUser", displayName = "NewUser", profileImage = "default" });
        db.Players.Add(new PlayerData { AccountId = 2, Hashword = "hashed", Birthday = new DateTime(2000, 1, 1) });
        db.PlayerSettings.Add(new PlayerSettings
        {
            AccountId = 2,
            Settings = "[{\"Key\":\"Recroom.AccountCreation.HasChosenUsername\",\"Value\":\"True\"}]"
        });
        await db.SaveChangesAsync();
        var api = CreateApi(db);

        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.HasFinished", Value = "True" });

        var saved = (await db.PlayerSettings.SingleAsync()).DeserializeSettings();
        Assert.DoesNotContain(saved, setting => setting.Key == "Recroom.AccountCreation.HasFinished");
        Assert.DoesNotContain(saved, setting => setting.Key == "Radicade.NeedsOrientation");
    }

    [Fact]
    public async Task CompletingOnboardingSetsOrientationMarkerOnlyAfterRequiredFieldsArePresent()
    {
        await using var db = CreateDb();
        db.Profiles.Add(new Profile { accountId = 2, username = "NewUser", displayName = "NewUser", profileImage = "default" });
        db.Players.Add(new PlayerData
        {
            AccountId = 2,
            Hashword = "hashed",
            Birthday = new DateTime(2000, 1, 1),
            CodeOfConductAccepted = true
        });
        db.PlayerSettings.Add(new PlayerSettings
        {
            AccountId = 2,
            Settings = "[{\"Key\":\"Recroom.AccountCreation.HasChosenUsername\",\"Value\":\"True\"}]"
        });
        await db.SaveChangesAsync();
        var api = CreateApi(db);

        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.HasFinished", Value = "True" });

        var saved = (await db.PlayerSettings.SingleAsync()).DeserializeSettings();
        Assert.Contains(saved, setting => setting.Key == "Recroom.AccountCreation.HasFinished" && setting.Value == "True");
        Assert.Contains(saved, setting => setting.Key == "Radicade.NeedsOrientation" && setting.Value == "1");
    }

    /// <summary>
    /// The flow records the acceptance as a setting on this build's own Code of Conduct page; the
    /// account's <c>account/me/acceptcoc</c> route is never called. Before this, an account whose
    /// player had walked that page still answered <c>hasAcceptedCodeOfConduct = false</c> - so the
    /// client offered the page again on the next boot, and the finish marker was refused over a flag
    /// the client's own pages never write.
    /// </summary>
    [Fact]
    public async Task TheConductPageRecordsTheAcceptanceOnTheAccountAndUnblocksTheFinishMarker()
    {
        await using var db = CreateDb();
        db.Profiles.Add(new Profile { accountId = 2, username = "NewUser", displayName = "NewUser", profileImage = "default" });
        db.Players.Add(new PlayerData { AccountId = 2, Hashword = "hashed", Birthday = new DateTime(2000, 1, 1) });
        db.PlayerSettings.Add(new PlayerSettings
        {
            AccountId = 2,
            Settings = "[{\"Key\":\"Recroom.AccountCreation.HasChosenUsername\",\"Value\":\"True\"}]"
        });
        await db.SaveChangesAsync();
        var api = CreateApi(db);

        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.AcceptedCodeOfConduct", Value = "True" });

        Assert.True((await db.Players.AsNoTracking().SingleAsync()).CodeOfConductAccepted);

        // And that is now enough for the flow to be able to finish.
        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.HasFinished", Value = "True" });

        var saved = (await db.PlayerSettings.SingleAsync()).DeserializeSettings();
        Assert.Contains(saved, setting => setting.Key == "Recroom.AccountCreation.HasFinished" && setting.Value == "True");
        Assert.Contains(saved, setting => setting.Key == "Radicade.NeedsOrientation" && setting.Value == "1");
    }

    /// <summary>
    /// A birthday that never arrived must not hold the finish marker hostage. Every account the flow
    /// has created on this server still reads 0001-01-01 - its age page has never handed this server
    /// one - so requiring it meant no player could ever leave the flow, and the title screen kept
    /// opening on "Welcome back! - Continue creating account" for an account whose every other page
    /// was done.
    /// </summary>
    [Fact]
    public async Task TheFinishMarkerIsRecordedForAnAccountWhoseAgePageNeverArrived()
    {
        await using var db = CreateDb();
        db.Profiles.Add(new Profile { accountId = 2, username = "NewUser", displayName = "NewUser", profileImage = "default" });
        db.Players.Add(new PlayerData { AccountId = 2, Hashword = "hashed", Birthday = null });
        db.PlayerSettings.Add(new PlayerSettings
        {
            AccountId = 2,
            Settings = "[{\"Key\":\"Recroom.AccountCreation.HasChosenUsername\",\"Value\":\"True\"}]"
        });
        await db.SaveChangesAsync();
        var api = CreateApi(db);

        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.AcceptedCodeOfConduct", Value = "True" });
        await api.SetSetting(new Setting { Key = "Recroom.AccountCreation.HasFinished", Value = "True" });

        var saved = (await db.PlayerSettings.SingleAsync()).DeserializeSettings();
        Assert.Contains(saved, setting => setting.Key == "Recroom.AccountCreation.HasFinished" && setting.Value == "True");

        // Still owed, so the account keeps asking for it until the age page hands one over.
        Assert.Null((await db.Players.AsNoTracking().SingleAsync()).Birthday);
    }

    [Theory]
    [InlineData("")]
    [InlineData("hashed-password")]
    public async Task SettingsDoNotSkipAnUnfinishedPasswordPage(string passwordHash)
    {
        await using var db = CreateDb();
        db.Players.Add(new PlayerData { AccountId = 2, Hashword = passwordHash });
        db.PlayerSettings.Add(new PlayerSettings
        {
            AccountId = 2,
            Settings = "[{\"Key\":\"Recroom.AccountCreation.HasCreatedPassword\",\"Value\":\"True\"}," +
                "{\"Key\":\"Recroom.AccountCreation.HasFinished\",\"Value\":\"True\"}," +
                "{\"Key\":\"Recroom.OOBE\",\"Value\":\"100\"}]"
        });
        await db.SaveChangesAsync();
        var settings = CreateApi(db).GetSettings();
        var expected = passwordHash.Length == 0 ? "False" : "True";
        Assert.Equal(expected, settings.Single(x => x.Key == "Recroom.AccountCreation.HasCreatedPassword").Value);
        Assert.Equal(expected, settings.Single(x => x.Key == "Recroom.AccountCreation.HasFinished").Value);
        Assert.Equal(passwordHash.Length == 0 ? "0" : "100", settings.Single(x => x.Key == "Recroom.OOBE").Value);
    }

    private static RecDBContext CreateDb()
    {
        var options = TestDbOptions.Create()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;
        return new RecDBContext(options);
    }

    private static PlayerSettingsAPI CreateApi(RecDBContext db)
    {
        var context = new DefaultHttpContext
        {
            User = new ClaimsPrincipal(new ClaimsIdentity(
                [new Claim(ClaimTypes.NameIdentifier, "2")], "test"))
        };
        return new PlayerSettingsAPI(db)
        {
            ControllerContext = new ControllerContext { HttpContext = context }
        };
    }
}