using Microsoft.EntityFrameworkCore;
using RadicadeServer.API.Storefront;
using RadicadeServer.DB;
using RadicadeServer.RecNet.Enums.Store;
using RadicadeServer.Utils;

namespace RadicadeServer.API.Notifications
{
    public static class RewardDiag
    {
        private const int DefaultLogLines = 120;

        public static async Task<string> DescribeAsync(RecDBContext db, long accountId, int logLines)
        {
            var lines = new System.Text.StringBuilder();

            lines.AppendLine($"build {BuildInfo.Tag}; assembly published {BuildInfo.AssemblyBuiltUtc:u}; running since {BuildInfo.StartedUtc:u}");
            lines.AppendLine($"account {accountId}");

            var progression = await db.Progression.AsNoTracking().FirstOrDefaultAsync(x => x.PlayerId == accountId);
            var json = progression?.GetProgressionJson();
            var rewards = json?.PendingGameRewards ?? new List<RecNet.Storefront.GameReward>();

            var day = json == null ? null : RewardDay.For(json, DateTime.UtcNow);
            if (day != null)
                lines.AppendLine($"today: dayKey={day.Day} firstActivityPaid={day.FirstActivityPaid} " +
                    $"dailyChallengePaid={day.DailyChallengePaid} activityBoxes={day.ActivityBoxes}/{RewardDay.ActivityBoxesPerDay}");

            lines.AppendLine($"reward selections kept: {rewards.Count} ({rewards.Count(r => !r.Consumed)} outstanding)");
            if (rewards.Count == 0)
                lines.AppendLine("  (none - no reward has been requested for this account since the ledger was last reset)");

            foreach (var reward in rewards.OrderByDescending(r => r.CreatedAt))
            {
                var state = reward.Consumed
                    ? $"collected box={reward.ConsumedGiftDropId} at {reward.ConsumedAt:u}"
                    : "OUTSTANDING";
                lines.AppendLine($"  selectionId={reward.RewardSelectionId} rewardType={reward.RewardType} " +
                    $"context={RewardTrace.Context(reward.GiftContext)} created={reward.CreatedAt:u} {state}");
                lines.AppendLine($"    message=\"{reward.Message}\"");
                lines.AppendLine($"    drop1={RewardTrace.Box(reward.GiftDrop1)}");
                lines.AppendLine($"    drop2={RewardTrace.Box(reward.GiftDrop2)}");
                lines.AppendLine($"    drop3={RewardTrace.Box(reward.GiftDrop3)}");
            }

            var boxes = await StorefrontShared.GetPendingGiftsAsync(db, accountId);
            lines.AppendLine($"pending gift boxes: {boxes.Count}");
            foreach (var box in boxes)
                lines.AppendLine($"  {RewardTrace.Box(box)} room={RroRewardPools.RoomForContext(box.Context) ?? "<none>"}");

            lines.AppendLine($"game-rewards.log tail (last {logLines} lines):");
            try
            {
                var path = System.IO.Path.Join(DBConfig.PersistentLogs, "game-rewards.log");
                if (!System.IO.File.Exists(path))
                    lines.AppendLine("  (no reward log has been written yet - the reward routes have not been hit)");
                else
                    foreach (var line in System.IO.File.ReadLines(path).TakeLast(Math.Clamp(logLines, 1, 2000)))
                        lines.AppendLine("  " + line);
            }
            catch (Exception ex)
            {
                lines.AppendLine($"  (the reward log could not be read: {ex.Message})");
            }

            return lines.ToString();
        }
    }
}