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

namespace FrameworkDAL.DTO.ECM
{
    using Guid = System.Guid;
    // ── Enum ────────────────────────────────────────────────────
    // Matches actual TATTACHMENT.ATTACHMENTOPTION CHECK constraint:
    //   0=ALFRESCO, 1=FILENET, 2=AMAZON S3, 3=FILE BASED
    public enum AttachmentOptionType
    {
        Alfresco  = 0,
        Filenet   = 1,
        AmazonS3  = 2,
        FileBased = 3
    }

    // ── Upload Request / Response ────────────────────────────────

    public class AttachmentUploadRequest
    {
        /// <summary>Links to MDOCUMENTSETDETAIL — determines templates, document type, etc.</summary>
        public int    DocumentSetDetailId  { get; set; }

        /// <summary>OBJECTTYPEID — FK to MENTITY(ENTITYID). Identifies the entity type.</summary>
        public int    ObjectTypeId         { get; set; }

        /// <summary>0 when uploading before entity save (Phase 1). Real PK when entity exists.</summary>
        public int    ObjectId             { get; set; }

        public int    BizTransactionTypeId { get; set; } = -1;

        /// <summary>FE-generated UUID. Used as folder placeholder in Phase 1.</summary>
        public Guid   RowGuid              { get; set; }

        /// <summary>
        /// Entity-specific context values for dynamic token resolution.
        /// e.g. { "poNumber": "PO-001", "vendor": { "vendorCode": "V001" } }
        /// </summary>
        public Dictionary<string, object> ContextDictionary { get; set; } = new();

        public string? Remarks             { get; set; }
        public string  Tags                { get; set; } = string.Empty;
        public byte    AttachmentType      { get; set; } = 0;  // 0=File, 1=Link
    }

    public class AttachmentUploadResponse
    {
        public int    AttachmentId       { get; set; }
        public string DisplayFileName    { get; set; } = string.Empty;
        public string FolderName         { get; set; } = string.Empty;
        public string AttachedFileName   { get; set; } = string.Empty;
        public long   FileSizeBytes      { get; set; }
        public bool   IsDeferred         { get; set; }
        public int    Version            { get; set; }
        public int    SlNo               { get; set; }
    }

    // ── Template Resolution Context ──────────────────────────────

    /// <summary>All input needed to resolve attachment paths at upload time.</summary>
    public class AttachmentResolutionContext
    {
        public LoginDTO  Login                { get; set; } = null!;
        public int       ObjectTypeId         { get; set; }   // OBJECTTYPEID
        public int       ObjectId             { get; set; }   // 0 in Phase 1
        public Guid      RowGuid              { get; set; }
        public int       BizTransactionTypeId { get; set; }
        public int       DocumentSetDetailId  { get; set; }
        public string    FileExtension        { get; set; } = string.Empty;
        public int       SlNo                 { get; set; }
        public int       Version              { get; set; }
        public DateTime  UploadedOn           { get; set; } = DateTime.UtcNow;
        public Dictionary<string, object> ContextDictionary { get; set; } = new();
    }

    /// <summary>Output of path resolution — all three TATTACHMENT path fields.</summary>
    public class ResolvedAttachmentPaths
    {
        public string FolderName        { get; set; } = string.Empty;
        public string AttachedFileName  { get; set; } = string.Empty;
        public string DisplayFileName   { get; set; } = string.Empty;
        public string StorageKey        { get; set; } = string.Empty;
        public bool   IsDeferred        { get; set; }
    }

    // ── Template Data (loaded from DB) ───────────────────────────

    public class AttachmentTemplateData
    {
        public int     DocumentSetDetailId   { get; set; }
        public int     DocumentSetId         { get; set; }
        public string? LocationTemplate      { get; set; }
        public string? DisplayNameTemplate   { get; set; }
        public string? DocumentNameTemplate  { get; set; }
        public string? TagFields             { get; set; }
        public string? PropertyFields        { get; set; }
        public int     ModuleId              { get; set; }
        public string  DocumentSetCode       { get; set; } = string.Empty;
        public string  DocumentSetName       { get; set; } = string.Empty;
        public int     DocumentTypeId        { get; set; }
        public string  DocumentTypeCode      { get; set; } = string.Empty;
        public string  DocumentTypeName      { get; set; } = string.Empty;
        public string  ModuleCode            { get; set; } = string.Empty;
        public string  ModuleName            { get; set; } = string.Empty;
        public byte    IsVersion             { get; set; }
    }

    // ── Phase 2 Deferred Path Resolution ────────────────────────

    /// <summary>An attachment that needs Phase 2 path re-resolution (ISPATHDEFERRED=1).</summary>
    public class DeferredAttachment
    {
        public int    AttachmentId        { get; set; }
        public string RowGuidPlaceholder  { get; set; } = string.Empty;
        public int    NewObjectId         { get; set; }
        public int    ObjectTypeId        { get; set; }
        public string OldCmsId            { get; set; } = string.Empty;
        public string OldFolderName       { get; set; } = string.Empty;
        public string OldAttachedFileName { get; set; } = string.Empty;
        public string DisplayFileName     { get; set; } = string.Empty;
        public byte   StorageAdapterType  { get; set; }
        public short  Version             { get; set; }
    }

    /// <summary>Path movement computed by Phase 2 — ready for storage move and DB update.</summary>
    public class PathMovement
    {
        public int    AttachmentId        { get; set; }
        public string OldCmsId            { get; set; } = string.Empty;
        public string NewFolderName       { get; set; } = string.Empty;
        public string NewAttachedFileName { get; set; } = string.Empty;
        public string NewCmsId            { get; set; } = string.Empty;
        public string NewDisplayFileName  { get; set; } = string.Empty;
    }

    // ── Internal helpers ─────────────────────────────────────────

    public class SlNoVersionResult
    {
        public short NextSlNo    { get; set; }
        public short NextVersion { get; set; }
    }
}