using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using ZB.MOM.WW.LmxOpcUa.Host.Domain;

namespace ZB.MOM.WW.LmxOpcUa.Tests.Helpers
{
    public class FakeGalaxyRepository : IGalaxyRepository
    {
        public event Action? OnGalaxyChanged;

        public List<GalaxyObjectInfo> Hierarchy { get; set; } = new List<GalaxyObjectInfo>();
        public List<GalaxyAttributeInfo> Attributes { get; set; } = new List<GalaxyAttributeInfo>();
        public DateTime? LastDeployTime { get; set; } = DateTime.UtcNow;
        public bool ConnectionSucceeds { get; set; } = true;
        public bool ShouldThrow { get; set; }

        public Task<List<GalaxyObjectInfo>> GetHierarchyAsync(CancellationToken ct = default)
        {
            if (ShouldThrow) throw new Exception("Simulated DB failure");
            return Task.FromResult(Hierarchy);
        }

        public Task<List<GalaxyAttributeInfo>> GetAttributesAsync(CancellationToken ct = default)
        {
            if (ShouldThrow) throw new Exception("Simulated DB failure");
            return Task.FromResult(Attributes);
        }

        public Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default)
        {
            if (ShouldThrow) throw new Exception("Simulated DB failure");
            return Task.FromResult(LastDeployTime);
        }

        public Task<bool> TestConnectionAsync(CancellationToken ct = default)
        {
            if (ShouldThrow) throw new Exception("Simulated DB failure");
            return Task.FromResult(ConnectionSucceeds);
        }

        public void RaiseGalaxyChanged() => OnGalaxyChanged?.Invoke();
    }
}