using System.ComponentModel.DataAnnotations;
using Tiku.Application.Catalog;

namespace Tiku.Api.Contracts;

public sealed class CatalogQueryDto
{
    /// <summary>
    /// 租户编码。未登录公开查询时使用；已登录时优先使用当前 token 的租户。
    /// </summary>
    [StringLength(100)]
    public string? TenantCode { get; set; }

    /// <summary>
    /// 地区 ID。
    /// </summary>
    public Guid? RegionId { get; set; }

    /// <summary>
    /// 功能模块 ID。
    /// </summary>
    public Guid? ModuleId { get; set; }

    /// <summary>
    /// 父节点 ID；传 root 表示根节点。
    /// </summary>
    [StringLength(64)]
    [RegularExpression("^(root|[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$")]
    public string? ParentId { get; set; }

    /// <summary>
    /// 院校 ID。
    /// </summary>
    public Guid? SchoolId { get; set; }

    /// <summary>
    /// 专业 ID。
    /// </summary>
    public Guid? MajorId { get; set; }

    /// <summary>
    /// 科目 ID。
    /// </summary>
    public Guid? SubjectId { get; set; }

    /// <summary>
    /// 导航节点 ID。
    /// </summary>
    public Guid? NodeId { get; set; }

    /// <summary>
    /// 名称关键词。
    /// </summary>
    [StringLength(100)]
    public string? Keyword { get; set; }

    /// <summary>
    /// 类型过滤，例如 cultural、professional、chapter、paper。
    /// </summary>
    [StringLength(50)]
    public string? Type { get; set; }

    /// <summary>
    /// 返回条数上限。
    /// </summary>
    [Range(1, 2000)]
    public int? Limit { get; set; }

    public CatalogFilter ToFilter(Guid tenantId)
    {
        var parentIsRoot = string.Equals(ParentId, "root", StringComparison.OrdinalIgnoreCase);
        Guid? parentId = parentIsRoot || string.IsNullOrWhiteSpace(ParentId)
            ? null
            : Guid.Parse(ParentId);

        return new CatalogFilter(
            tenantId,
            RegionId,
            ModuleId,
            parentId,
            parentIsRoot,
            SchoolId,
            MajorId,
            SubjectId,
            NodeId,
            Keyword,
            Type,
            Limit);
    }
}