using Ananta.SDK.Rpc;
using Ananta.Server.ClientData.Client4229938;
using Ananta.Server.Handlers;
using Ananta.Server.Protocol.Client4229938;
using Auto = Ananta.Server.RpcTypes.Client4229938.Auto;
using GameMethods = Ananta.Server.RpcTypes.Client4229938.Methods.Game;

namespace Ananta.Server.Handlers.Game;

/// <summary>
/// Phone menu skin parts (手机壁纸 / 装饰 / 挂件).
///
/// The client's "apply" button only sends AskSetMobileSkinPart and then waits for the answer.
/// It never writes the worn suit locally: GameToClientImpl.SyncSpiritMobileSkinPartInfo is the
/// sole writer of SpiritInfo.MobileSkinInfo, and it is also what fires
/// ON_SYNC_SPIRIT_SKIN_PART_INFO_CHANGE so MainPhonePanelStore.OnSpiritSkinPartChange re-reads the
/// value. Because this method previously fell through to the typed-neutral fallback, the whole
/// sequence ended with "applied successfully" and an unchanged wallpaper: the preview closed, the
/// panel re-read the untouched login struct, and the wallpaper snapped back.
///
/// This handler stores the choice per character (and mirrors it to PlayerProgressStore) and replays
/// it as SyncSpiritMobileSkinPartInfo so the wallpaper actually changes — and stays changed across
/// re-logins, because the login payload now carries the stored suit.
///
/// The reply stays an empty 0-error body, byte-identical to what the fallback produced, so the
/// client's existing "close preview / show result toast" branch is untouched.
/// </summary>
internal sealed partial class GameRouter
{
    [Handler(MethodId.AskSetMobileSkinPart, HandlerPacketKind.Invoke)]
    private async Task AskSetMobileSkinPart4229938(Connection conn, UxRpcMessage msg)
    {
        if (!msg.TryGetArgs<GameMethods.AskSetMobileSkinPart>(out var args) || args is null)
        {
            conn.Log.Warn($"[PHONE-SKIN] AskSetMobileSkinPart undecodable bytes={msg.Body.Length}");
            await conn.ReturnEmptyOkAsync(msg);
            return;
        }

        await ApplyPhoneSkin4229938Async(
            conn, msg,
            args.wallpaper, args.decoration, args.pendant,
            "set");
    }

    [Handler(MethodId.AskResetMobileSkinPart, HandlerPacketKind.Invoke)]
    private Task AskResetMobileSkinPart4229938(Connection conn, UxRpcMessage msg)
        => ApplyPhoneSkin4229938Async(
            conn, msg,
            NpcCultivationCatalog4229938.DefaultWallpaperPart,
            NpcCultivationCatalog4229938.DefaultDecorationPart,
            NpcCultivationCatalog4229938.DefaultPendantPart,
            "reset");

    /// <summary>
    /// Stores the worn suit for the character currently in play and echoes it back.
    ///
    /// The spirit id must be a FightSpiritConfig template id, not a unit instance id: the client
    /// looks the character up through SpiritManager.spiritViewDatas, which SyncPlayerInfoSpirit /
    /// SyncPlayerAllSpirits key by SpiritInfo.TemplateId, and GetCurrentSpiritSkinInfo resolves the
    /// same way through gBattleSpiritMgr.currentSpiritTemplateId (= InfoSpirit.ActiveSpirit).
    /// </summary>
    private async Task ApplyPhoneSkin4229938Async(
        Connection conn,
        UxRpcMessage msg,
        uint wallpaper,
        uint decoration,
        uint pendant,
        string reason)
    {
        var state = GetWorldState(msg.Context);
        var spiritId = state.ActiveSpiritTemplateId;

        lock (state.SyncRoot)
        {
            state.PhoneSkinBySpirit[spiritId] = new Auto.SpiritMobileSkinInfo
            {
                Wallpaper = wallpaper,
                Decoration = decoration,
                Pendant = pendant,
            };
        }

        // Re-state the full part list so the packet is self-contained. It must NOT be empty: an
        // empty Lua list is truthy and would wipe the phone's skin list. When the catalog is
        // unavailable (no config folder) we pass null instead, which the client reads as
        // "leave my list alone".
        var parts = NpcCultivationCatalog4229938.SkinParts;
        List<uint>? available = parts.Count > 0 ? parts.Select(part => part.Id).ToList() : null;

        await conn.NotifyAsync(MethodId.SyncSpiritMobileSkinPartInfo, new GameMethods.SyncSpiritMobileSkinPartInfo
        {
            spiritId = spiritId,
            mobileSkinInfo = new Auto.SpiritMobileSkinInfo
            {
                Wallpaper = wallpaper,
                Decoration = decoration,
                Pendant = pendant,
            },
            availableSkinParts = available,
        });

        PlayerProgressStore.Save(state, conn.Log);

        conn.Log.Info(
            $"[PHONE-SKIN] {reason} spirit={spiritId} wallpaper={wallpaper} " +
            $"decoration={decoration} pendant={pendant} parts={available?.Count ?? -1}");

        await conn.ReturnEmptyOkAsync(msg);
    }
}