using Admin.NET.Plugin.AiDOP.Entity.S8;
using Admin.NET.Plugin.AiDOP.Infrastructure.S8;
using Admin.NET.Plugin.ApprovalFlow.Service;
using Microsoft.Extensions.Logging;

namespace Admin.NET.Plugin.AiDOP.Service.S8;

/// <summary>
/// S8 通知分层路由解析器（S8-NOTIFY-LAYER-RESOLVE-1）
///
/// 职责链：
///   (tenantId, factoryId, sceneCode, severity)
///     → 命中 ado_s8_notification_layer 行（多行 OK）
///     → 解析 target_role_ids（dual-format）
///     → 解析 notify_channel（IgnoreCase, ',' / ';' 分隔）
///     → S8RoleResolver → userIds
///     → S8NotificationPushAdapter.PushAsync
///     → 由 PushAdapter 落 AdoS8NotificationLog（每渠道一条）
///
/// 不接入 watch / scheduler / task 主链路；不写 ApprovalFlowNotifyLog；
/// 不修改任何 schema；任何分支异常仅 LogWarning，不向上抛。
///
/// tenant/factory baseline fallback：先精确匹配 (tenantId, factoryId)；
/// 若 0 行，再尝试 (tenant=0, factory=0) baseline；仍 0 行 LogInformation 后 return。
/// </summary>
public class S8NotificationLayerResolver : ITransient
{
	private readonly SqlSugarRepository<AdoS8NotificationLayer> _layerRep;
	private readonly S8RoleResolver _roleResolver;
	private readonly S8NotificationPushAdapter _pushAdapter;
	private readonly ILogger<S8NotificationLayerResolver> _logger;

	public S8NotificationLayerResolver(
		SqlSugarRepository<AdoS8NotificationLayer> layerRep,
		S8RoleResolver roleResolver,
		S8NotificationPushAdapter pushAdapter,
		ILogger<S8NotificationLayerResolver> logger)
	{
		_layerRep = layerRep;
		_roleResolver = roleResolver;
		_pushAdapter = pushAdapter;
		_logger = logger;
	}

	public class DispatchByLayerInput
	{
		public long TenantId { get; set; }
		public long FactoryId { get; set; }
		public long? ExceptionId { get; set; }
		public string? ExceptionNo { get; set; }
		public string SceneCode { get; set; } = string.Empty;
		public string Severity { get; set; } = string.Empty;
		public string Title { get; set; } = string.Empty;
		public string Content { get; set; } = string.Empty;
		public string? Status { get; set; }
		public string? SourceRuleCode { get; set; }
		public string? JumpUrl { get; set; }
		/// <summary>
		/// S8-NOTIFY-WIRE-RECOVERED-1：true 表示恢复事件，BuildNotification 会在 Context 中追加
		/// "recovered"="true"。默认 false，保持 CREATED 路径载荷向后兼容。
		/// </summary>
		public bool Recovered { get; set; }
	}

	/// <summary>
	/// 调用方：watch/scheduler/task 在拿到 sceneCode + severity 后调用本方法（本轮不接入主链路）。
	/// </summary>
	public async Task DispatchByLayerAsync(DispatchByLayerInput input)
	{
		if (input == null)
		{
			_logger.LogWarning("S8LayerDispatch: input null");
			return;
		}
		if (string.IsNullOrWhiteSpace(input.SceneCode) || string.IsNullOrWhiteSpace(input.Severity))
		{
			_logger.LogInformation("S8LayerDispatch skip: empty sceneCode or severity (exceptionId={ExceptionId})", input.ExceptionId);
			return;
		}

		List<AdoS8NotificationLayer> layers;
		try
		{
			layers = await _layerRep.AsQueryable()
				.Where(x => x.TenantId == input.TenantId
					&& x.FactoryId == input.FactoryId
					&& x.SceneCode == input.SceneCode
					&& x.Severity == S8SeverityCode.Normalize(input.Severity))
				.ToListAsync();

			// baseline fallback：未命中精确租户/工厂 → 尝试 tenant=0/factory=0 全局基线
			// （task 第 4 条允许；schema 中 tenant_id/factory_id 为 NOT NULL bigint，0 视为基线占位）
			if (layers.Count == 0)
			{
				layers = await _layerRep.AsQueryable()
					.Where(x => x.TenantId == 0
						&& x.FactoryId == 0
						&& x.SceneCode == input.SceneCode
						&& x.Severity == S8SeverityCode.Normalize(input.Severity))
					.ToListAsync();
				if (layers.Count > 0)
					_logger.LogInformation("S8LayerDispatch: matched {N} baseline (tenant=0/factory=0) layer rows", layers.Count);
			}
		}
		catch (Exception ex)
		{
			_logger.LogWarning(ex, "S8LayerDispatch: query AdoS8NotificationLayer failed (scene={Scene}, sev={Sev})", input.SceneCode, input.Severity);
			return;
		}

		if (layers.Count == 0)
		{
			_logger.LogInformation("S8LayerDispatch: no layer matched (tenant={Tenant}, factory={Factory}, scene={Scene}, sev={Sev})",
				input.TenantId, input.FactoryId, input.SceneCode, input.Severity);
			return;
		}

		var notification = BuildNotification(input);

		foreach (var layer in layers)
		{
			List<long> userIds;
			try
			{
				var tokens = S8RoleResolver.SplitTokens(layer.TargetRoleIds);
				if (tokens.Count == 0)
				{
					_logger.LogWarning("S8LayerDispatch: layer id={LayerId} target_role_ids empty, skip row", layer.Id);
					continue;
				}
				userIds = await _roleResolver.ResolveUserIdsAsync(tokens);
			}
			catch (Exception ex)
			{
				_logger.LogWarning(ex, "S8LayerDispatch: resolve roles failed for layer id={LayerId}", layer.Id);
				continue;
			}

			if (userIds.Count == 0)
			{
				_logger.LogWarning("S8LayerDispatch: layer id={LayerId} resolved 0 users from target_role_ids='{Roles}'",
					layer.Id, layer.TargetRoleIds);
				continue;
			}

			var channels = ParseChannels(layer.NotifyChannel);
			try
			{
				await _pushAdapter.PushAsync(
					tenantId: input.TenantId,
					factoryId: input.FactoryId,
					exceptionId: input.ExceptionId,
					userIds: userIds,
					notification: notification,
					channels: channels);
			}
			catch (Exception ex)
			{
				// PushAdapter 自身已对内部错误做了捕获；这里再兜一层保证主流程不被打断。
				_logger.LogWarning(ex, "S8LayerDispatch: push throw (layer id={LayerId})", layer.Id);
			}
		}
	}

	private static FlowNotification BuildNotification(DispatchByLayerInput input)
	{
		// 注意：FlowNotificationTypeEnum 不含 S8_EXCEPTION 值；BizType 字段承载 "S8_EXCEPTION" 语义。
		// InstanceId 仅作为载荷字段（PushAdapter 不写 ApprovalFlowNotifyLog，不会脏写该列）。
		var ctx = new Dictionary<string, string?>
		{
			["exceptionId"] = input.ExceptionId?.ToString(),
			["exceptionNo"] = input.ExceptionNo,
			["sceneCode"] = input.SceneCode,
			["severity"] = input.Severity,
			["status"] = input.Status,
			["sourceRuleCode"] = input.SourceRuleCode,
			["jumpUrl"] = input.JumpUrl,
		};
		if (input.Recovered) ctx["recovered"] = "true";
		return new FlowNotification
		{
			Type = FlowNotificationTypeEnum.NewTask,
			BizType = "S8_EXCEPTION",
			InstanceId = input.ExceptionId ?? 0,
			Title = input.Title ?? string.Empty,
			Content = input.Content ?? string.Empty,
			Context = ctx,
		};
	}

	public static List<string> ParseChannels(string? csv)
	{
		if (string.IsNullOrWhiteSpace(csv)) return new List<string>();
		return csv.Split(new[] { ',', ';' }, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries).ToList();
	}
}