using GB5Shared.DTO.Framework.Login;
using GB5Shared.ScanIdentifier;
using WiDAL.CustomCode.ScanTarget;

namespace WiBLL.ScanTarget;

// Phase 1 resolver for the Scan-Identifier & Label Platform (GB5Shared/ScanIdentifier) — "MEMPLOYEE".
// Reads MEMPLOYEE directly via EmployeeScanTargetDAL (same cross-module-SQL-without-ProjectReference
// pattern already used this session) rather than the cross-host Hrms.Employeemaster.Get call the FE
// uses today — a resolver needs a fast in-process lookup, not an HTTP round trip.
public class EmployeeResolver : IScanTargetResolver
{
    private readonly IEmployeeScanTargetDAL _dal;

    public EmployeeResolver(IEmployeeScanTargetDAL dal) => _dal = dal;

    public IEnumerable<string> SupportedEntityTypes => new[] { "MEMPLOYEE" };

    public async Task<bool> ExistsAsync(string entityId, LoginDTO login, CancellationToken ct)
        => int.TryParse(entityId, out var employeeId)
           && await _dal.GetByIdAsync(employeeId, login, ct).ConfigureAwait(false) is not null;

    public async Task<ScanTargetDisplayDTO?> GetDisplayAsync(string entityId, LoginDTO login, CancellationToken ct)
    {
        if (!int.TryParse(entityId, out var employeeId)) return null;
        var emp = await _dal.GetByIdAsync(employeeId, login, ct).ConfigureAwait(false);
        return emp is null ? null : new ScanTargetDisplayDTO { EntityId = entityId, Code = emp.Code, Name = emp.Name };
    }

    public async Task<IEnumerable<ScanTargetDisplayDTO>> SearchAsync(string? term, LoginDTO login, CancellationToken ct)
    {
        var rows = await _dal.SearchAsync(term ?? string.Empty, login, ct).ConfigureAwait(false);
        return rows.Select(r => new ScanTargetDisplayDTO { EntityId = r.EmployeeId.ToString(), Code = r.Code, Name = r.Name });
    }
}