HokmPlay/server/src/Hokm.Server/Profiles/ProfileService.cs

using System.Text.Json;
using Hokm.Server.Data;
using Microsoft.EntityFrameworkCore;

namespace Hokm.Server.Profiles;

public class ProfileService
{
    private readonly AppDbContext _db;
    public ProfileService(AppDbContext db) => _db = db;

    public static readonly CoinPackDto[] Packs =
    {
        new() { Id = "p1", Coins = 1000, Bonus = 0, PriceToman = 19000 },
        new() { Id = "p2", Coins = 5000, Bonus = 500, PriceToman = 89000, Tag = "popular" },
        new() { Id = "p3", Coins = 12000, Bonus = 2000, PriceToman = 179000, Tag = "best" },
        new() { Id = "p4", Coins = 30000, Bonus = 7000, PriceToman = 399000 },
    };

    private static ProfileDto Default(string userId, string? name) => new()
    {
        Id = userId,
        Username = "player_" + (userId.Length >= 4 ? userId[^4..] : userId),
        DisplayName = string.IsNullOrWhiteSpace(name) ? "بازیکن" : name!,
        CreatedAt = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
    };

    public async Task<ProfileDto> GetOrCreate(string userId, string? name)
    {
        var row = await _db.Profiles.FindAsync(userId);
        if (row == null)
        {
            var dto = Default(userId, name);
            await SaveInternal(dto);
            return dto;
        }
        return JsonSerializer.Deserialize<ProfileDto>(row.Json, JsonOpts.Default) ?? Default(userId, name);
    }

    private async Task SaveInternal(ProfileDto p)
    {
        var json = JsonSerializer.Serialize(p, JsonOpts.Default);
        var row = await _db.Profiles.FindAsync(p.Id);
        if (row == null) _db.Profiles.Add(new ProfileRow { Id = p.Id, Json = json, UpdatedAt = DateTime.UtcNow });
        else { row.Json = json; row.UpdatedAt = DateTime.UtcNow; }
        await _db.SaveChangesAsync();
    }

    public async Task<ProfileDto> Save(ProfileDto p) { await SaveInternal(p); return p; }

    private async Task Ledger(string uid, string kind, int amount, string? @ref)
    {
        _db.Ledger.Add(new LedgerRow { UserId = uid, Kind = kind, Amount = amount, Ref = @ref, CreatedAt = DateTime.UtcNow });
        await _db.SaveChangesAsync();
    }

    public async Task<ProfileDto> Update(string uid, JsonElement patch)
    {
        var p = await GetOrCreate(uid, null);
        if (patch.TryGetProperty("displayName", out var dn) && dn.ValueKind == JsonValueKind.String) p.DisplayName = dn.GetString()!;
        if (patch.TryGetProperty("avatar", out var av) && av.ValueKind == JsonValueKind.String) p.Avatar = av.GetString()!;
        if (patch.TryGetProperty("avatarImage", out var ai) && ai.ValueKind == JsonValueKind.String) p.AvatarImage = ai.GetString();
        if (patch.TryGetProperty("title", out var ti) && ti.ValueKind == JsonValueKind.String) p.Title = ti.GetString();
        if (patch.TryGetProperty("cardFront", out var cf) && cf.ValueKind == JsonValueKind.String) p.CardFront = cf.GetString()!;
        if (patch.TryGetProperty("cardBack", out var cb) && cb.ValueKind == JsonValueKind.String) p.CardBack = cb.GetString()!;
        return await Save(p);
    }

    public async Task<ProfileDto> UpgradePlan(string uid)
    {
        var p = await GetOrCreate(uid, null);
        p.Plan = "pro";
        p.PlanUntil = DateTimeOffset.UtcNow.AddDays(30).ToUnixTimeMilliseconds();
        return await Save(p);
    }

    public async Task<(bool ok, ProfileDto? profile, int coins)> BuyCoins(string uid, string packId)
    {
        var pack = Packs.FirstOrDefault(x => x.Id == packId);
        if (pack == null) return (false, null, 0);
        // NOTE: real payment (Zarinpal/IDPay) verification goes here.
        var p = await GetOrCreate(uid, null);
        int added = pack.Coins + pack.Bonus;
        p.Coins += added;
        await Save(p);
        await Ledger(uid, "purchase", added, packId);
        return (true, p, added);
    }

    public async Task<(RewardResultDto reward, ProfileDto profile)> ApplyMatch(string uid, MatchSummaryDto s)
    {
        var p = await GetOrCreate(uid, null);
        // No real opponent rating tracked yet — treat as an even match.
        var reward = Gamification.ApplyMatch(p, s, p.Rating);
        await Save(p);
        await Ledger(uid, "match", reward.CoinsDelta, s.Ranked ? "ranked" : "casual");
        return (reward, p);
    }

    /// <summary>Deduct a ranked entry/stake up front. Returns null if not enough coins.</summary>
    public async Task<ProfileDto?> ChargeEntry(string uid, int amount)
    {
        var p = await GetOrCreate(uid, null);
        if (amount <= 0) return p;
        if (p.Coins < amount) return null;
        p.Coins -= amount;
        await Save(p);
        await Ledger(uid, "entry", -amount, "ranked");
        return p;
    }

    /* ----------------------------- shop ------------------------------- */

    public async Task<(bool ok, ProfileDto? profile, string error)> ShopBuy(string uid, string kind, string id, int price)
    {
        var p = await GetOrCreate(uid, null);
        var list = kind switch
        {
            "avatar" => p.OwnedAvatars,
            "cardfront" => p.OwnedCardFronts,
            "cardback" => p.OwnedCardBacks,
            "reactionpack" => p.OwnedReactionPacks,
            "stickerpack" => p.OwnedStickerPacks,
            _ => null,
        };
        if (list == null) return (false, null, "bad_kind");
        if (list.Contains(id)) return (false, p, "owned");
        if (price < 0 || p.Coins < price) return (false, p, "insufficient");
        p.Coins -= price;
        list.Add(id);
        await Save(p);
        await Ledger(uid, "shop", -price, $"{kind}:{id}");
        return (true, p, "");
    }

    /* ----------------------------- daily ------------------------------ */

    private static readonly int[] DailyRewards = { 100, 150, 200, 300, 400, 500, 1000 };
    private static string Today => DateTime.UtcNow.ToString("yyyy-MM-dd");

    public async Task<(int day, string? lastClaimed, bool available)> GetDaily(string uid)
    {
        var p = await GetOrCreate(uid, null);
        return (p.DailyDay, p.DailyLastClaimed, p.DailyLastClaimed != Today);
    }

    public async Task<(int reward, ProfileDto profile, int day)> ClaimDaily(string uid)
    {
        var p = await GetOrCreate(uid, null);
        if (p.DailyLastClaimed == Today) return (0, p, p.DailyDay);
        int day = p.DailyDay;
        int reward = DailyRewards[Math.Min(day, DailyRewards.Length) - 1];
        p.Coins += reward;
        p.DailyDay = day >= 7 ? 1 : day + 1;
        p.DailyLastClaimed = Today;
        await Save(p);
        await Ledger(uid, "daily", reward, "day" + day);
        return (reward, p, day);
    }
}