using GB5Shared.DTO.Framework.Login;
using System;
using System.Collections.Generic;

namespace FrameworkDAL.DTO.EIPConversation
{
    /// <summary>
    /// Internal execution context used by engine phases.
    /// Carries state between Phase 1–6.
    /// </summary>
    public class EIPExecutionContextDTO
    {
        // ===============================
        // Identity
        // ===============================
        public int ConversationId { get; set; }

        // 🔹 Use fully qualified name to avoid namespace conflict
        public System.Guid CorrelationId { get; set; } = System.Guid.NewGuid();

        public int? TenantId { get; set; }

        public int UserId { get; set; }

        // 🔹 Security Context
        public LoginDTO LoginDTO { get; set; } = default!;

        // ===============================
        // Channel Information
        // ===============================
        public EIPChannelType ChannelType { get; set; }

        /// <summary>
        /// Channel as string (WHATSAPP, SMS, POSTMAN, etc.) used by handlers
        /// </summary>
        public string Channel { get; set; } = string.Empty;

        public string UserIdentifier { get; set; } = string.Empty;

        public string RawPayload { get; set; } = string.Empty;

        // ===============================
        // Message Information
        // ===============================
        public int SystemUserId { get; set; }

        public string ExternalUserIdentifier { get; set; } = string.Empty;

        public string OriginalMessage { get; set; } = string.Empty;

        public string NormalizedMessage { get; set; } = string.Empty;

        public string? Message { get; set; }

        // ===============================
        // Flow State
        // ===============================
        public string? FlowCode { get; set; }

        public string? CurrentStepCode { get; set; }

        public string? NextStepCode { get; set; }

        /// <summary>TEIPINTERACTIONSESSION.INTERACTIONSESSIONID for this conversation thread —
        /// set by EIPConversationEngine once resolved; 0 means observability logging is unavailable
        /// for this turn (e.g. the interaction-session lookup itself failed) and should be skipped.</summary>
        public int InteractionSessionId { get; set; }

        /// <summary>TEIPCONVERSATION.CONVERSATIONID for this conversation thread — companion to
        /// InteractionSessionId, used to log inbound/outbound TEIPCONVERSATIONDETAIL rows.</summary>
        public int ConversationLogId { get; set; }

        // ===============================
        // Execution Flags
        // ===============================
        public bool IsCompleted { get; set; } = false;

        public bool IsSuccess { get; set; } = true;

        // ===============================
        // Response
        // ===============================
        public string? ResponseMessage { get; set; }

        // ===============================
        // Timing
        // ===============================
        public DateTime ReceivedAtUtc { get; set; } = DateTime.UtcNow;

        public DateTime? CompletedAtUtc { get; set; }

        // ===============================
        // Runtime Data (Shared Between Phases)
        // ===============================
        public Dictionary<string, object> Variables { get; set; } = new Dictionary<string, object>();

        // 🔹 Payload for capability layer
        public Dictionary<string, object> Payload { get; set; } = new Dictionary<string, object>();

        // ===============================
        // Engine Tracing
        // ===============================
        /// <summary>
        /// Tracks execution phase progress (PHASE1..PHASE6)
        /// </summary>
        public List<EIPExecutionPhaseDTO>? PhaseTrace { get; set; }
        /// <summary>
        /// Metadata dictionary to store contextual info like last sent timestamp, recipient, response status
        /// </summary>
        public Dictionary<string, object> Metadata { get; set; } = new Dictionary<string, object>();
    }

    /// <summary>
    /// Supported communication channels.
    /// IMPORTANT: Do not change numeric values (used for persistence).
    /// </summary>
    public enum EIPChannelType
    {
        PostMan = 0,
        WhatsApp = 1,
        Teams = 2,
        Telegram = 3,
        Slack = 4,
        SMS = 5,
        AppChat = 6,
        Voice = 7,

        /// <summary>Stateless, token-authenticated HTML stepper used by DirectAction's
        /// NeedsInput=1 conversational handoff (GET/POST /Action/Conversation*) — the
        /// recipient clicked an email link, isn't logged in, and has no messaging channel.</summary>
        DirectActionWeb = 8
    }
}