// Copyright (c) 2023 Timothy Schenk. Subject to the GNU AGPL Version 3 License.

using Microsoft.EntityFrameworkCore;
using Server.DB;
using Server.DB.Documents;
using Wonderking.Game.Data.Character;
using Wonderking.Packets.Outgoing.Data;

namespace Server.PacketHandlers;

public partial class ChannelSelectionHandler
{
    private static readonly Func<WonderkingContext, Guid, Task<bool>> _accountExists = EF.CompileAsyncQuery(
        (WonderkingContext context, Guid accountId) =>
            context.Accounts.AsNoTracking().Any(a => a.Id == accountId));

    private static readonly Func<WonderkingContext, Guid, Task<int>> _getAmountOfCharacters =
        EF.CompileAsyncQuery((WonderkingContext context, Guid accountId) =>
            context.Characters.AsNoTracking()
                .Where(c => c.Account.Id == accountId).Take(3)
                .Count());

    private static readonly Func<WonderkingContext, Guid, IAsyncEnumerable<string>> _getGuildNames =
        EF.CompileAsyncQuery((WonderkingContext context, Guid accountId) =>
            context.Characters.AsNoTracking()
                .Where(c => c.Account.Id == accountId && c.Guild != null)
                .Select(c => c.Guild.Name).Take(3));

    private static readonly Func<WonderkingContext, Guid, IAsyncEnumerable<CharacterDataProjection>>
        _getCharacters =
            EF.CompileAsyncQuery((WonderkingContext context, Guid accountId) =>
                context.Characters.AsNoTracking().AsSplitQuery()
                    .Where(c => c.Account.Id == accountId)
                    .Select(c => new CharacterDataProjection(
                        c.Name,
                        c.JobData,
                        c.Gender,
                        c.Level,
                        c.Experience,
                        c.BaseStats,
                        c.Health,
                        c.Mana,
                        c.InventoryItems.Select(i => new InventoryItemProjection(i.ItemId, i.Slot, i.InventoryTab))
                    )).Take(3));

    private sealed record InventoryItemProjection(ushort ItemId, byte Slot, InventoryTab InventoryTab);

    private sealed record CharacterDataProjection(
        string Name,
        JobData JobData,
        Gender Gender,
        ushort Level,
        long Experience,
        BaseStats BaseStats,
        int Health,
        int Mana,
        IEnumerable<InventoryItemProjection> InventoryItems);
}