using AcDream.Launcher.Core.Profiles;

namespace AcDream.Launcher.Core.Tests.Profiles;

/// <summary>
/// The roster-merge matrix (Campaign LA plan §LA3 acceptance): a new
/// character, an existing character keeping its user settings, and a
/// character absent from a later roster snapshot being retained
/// (possibly pending-delete).
/// </summary>
public sealed class RosterMergeTests
{
    private static LauncherProfileStore NewStoreWithServerAndAccount()
    {
        var store = new LauncherProfileStore(
            Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N") + ".json"));
        store.Load();
        store.AddServer("Local ACE", "127.0.0.1", 9000);
        store.AddAccount("Local ACE", "testaccount", "testpassword");
        return store;
    }

    [Fact]
    public void FirstMergeAddsNewCharactersWithDefaultLaunchModeGuiSelect()
    {
        LauncherProfileStore store = NewStoreWithServerAndAccount();

        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [
                new CharacterRosterEntry(0x5000000A, "+Acdream", 0),
                new CharacterRosterEntry(0x5000000B, "+Second", 0),
            ]);

        List<CharacterProfile> characters =
            store.Document.Servers.Single().Accounts.Single().Characters;
        Assert.Equal(2, characters.Count);

        CharacterProfile first = characters.Single(c => c.Name == "+Acdream");
        Assert.Equal("0x5000000A", first.Id);
        Assert.Equal(LaunchMode.GuiSelect, first.LaunchMode);
        Assert.Empty(first.Plugins);
        Assert.Empty(first.LoginCommands);

        CharacterProfile second = characters.Single(c => c.Name == "+Second");
        Assert.Equal("0x5000000B", second.Id);
        Assert.Equal(LaunchMode.GuiSelect, second.LaunchMode);
    }

    [Fact]
    public void SecondMergePreservesUserSettingsOnAnExistingCharacter()
    {
        LauncherProfileStore store = NewStoreWithServerAndAccount();
        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+Acdream", 0)]);
        store.EditCharacter(
            "Local ACE",
            "testaccount",
            "+Acdream",
            launchMode: LaunchMode.Headless,
            plugins: ["ExamplePlugin"],
            loginCommands: ["/vt start"]);

        // A later probe reports the same character again (same id), with
        // a renamed display — settings must survive untouched.
        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+Acdream", 0)]);

        CharacterProfile character = Assert.Single(
            store.Document.Servers.Single().Accounts.Single().Characters);
        Assert.Equal(LaunchMode.Headless, character.LaunchMode);
        Assert.Equal(["ExamplePlugin"], character.Plugins);
        Assert.Equal(["/vt start"], character.LoginCommands);
    }

    [Fact]
    public void MergeUpdatesNameWhenIdMatchesButDisplayNameChanged()
    {
        LauncherProfileStore store = NewStoreWithServerAndAccount();
        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+OldName", 0)]);

        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+NewName", 0)]);

        CharacterProfile character = Assert.Single(
            store.Document.Servers.Single().Accounts.Single().Characters);
        Assert.Equal("+NewName", character.Name);
        Assert.Equal("0x5000000A", character.Id);
    }

    [Fact]
    public void CharacterAbsentFromALaterRosterSnapshotIsRetained()
    {
        LauncherProfileStore store = NewStoreWithServerAndAccount();
        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [
                new CharacterRosterEntry(0x5000000A, "+Acdream", 0),
                new CharacterRosterEntry(0x5000000B, "+PendingDelete", 1),
            ]);

        // A later probe's roster only reports one of the two — e.g. the
        // other was deleted and is now in ACE's grace window / a
        // partial snapshot. The store never removes rows on the
        // caller's behalf.
        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+Acdream", 0)]);

        List<CharacterProfile> characters =
            store.Document.Servers.Single().Accounts.Single().Characters;
        Assert.Equal(2, characters.Count);
        Assert.Contains(characters, c => c.Name == "+Acdream");
        Assert.Contains(characters, c => c.Name == "+PendingDelete");
    }

    [Fact]
    public void MergeNormalizesAnUnprefixedHexIdInsteadOfCreatingADuplicateRow()
    {
        // Review finding F10: a hand-edited row can carry an id without
        // the "0x" prefix (e.g. copy-pasted from somewhere that dropped
        // it). CharacterIdFormat.TryParse now REJECTS that string
        // outright (it no longer guesses hex-without-a-prefix), so the
        // old raw string-equality comparison against the roster's
        // canonical "0x..." form would never match and would add a
        // second row forever. The name-fallback match must still
        // recognize this as the SAME character and self-heal its id.
        LauncherProfileStore store = NewStoreWithServerAndAccount();
        store.Document.Servers.Single().Accounts.Single().Characters.Add(
            new CharacterProfile { Id = "5000000A", Name = "+Acdream" });

        store.MergeRoster(
            "Local ACE",
            "testaccount",
            [new CharacterRosterEntry(0x5000000A, "+Acdream", 0)]);

        CharacterProfile character = Assert.Single(
            store.Document.Servers.Single().Accounts.Single().Characters);
        Assert.Equal("0x5000000A", character.Id);
        Assert.Equal("+Acdream", character.Name);
    }

    [Fact]
    public void MergeThrowsForUnknownServerOrAccount()
    {
        LauncherProfileStore store = NewStoreWithServerAndAccount();

        Assert.Throws<LauncherProfileException>(
            () => store.MergeRoster(
                "Nope",
                "testaccount",
                [new CharacterRosterEntry(1, "x", 0)]));

        Assert.Throws<LauncherProfileException>(
            () => store.MergeRoster(
                "Local ACE",
                "nope",
                [new CharacterRosterEntry(1, "x", 0)]));
    }
}