using System.Text.Json;

namespace MigrationTool.Models;

/// <summary>
/// 网关租户路由数据库模型
/// </summary>
public class GwTenantRouteModel
{
    public long Id { get; set; }
    public string TenantCode { get; set; } = string.Empty;
    public string ServiceName { get; set; } = string.Empty;
    public string ClusterId { get; set; } = string.Empty;
    public string PathPattern { get; set; } = string.Empty;
    public string? MatchJson { get; set; }
    public int Priority { get; set; }
    public int Status { get; set; }
    public bool IsGlobal { get; set; }
    public bool IsDeleted { get; set; }

    /// <summary>
    /// 解析 Match JSON 获取路径
    /// </summary>
    public string GetPath()
    {
        if (string.IsNullOrEmpty(MatchJson))
            return PathPattern;

        try
        {
            var match = JsonSerializer.Deserialize<RouteMatchJson>(MatchJson);
            return match?.Path ?? PathPattern;
        }
        catch
        {
            return PathPattern;
        }
    }

    /// <summary>
    /// 解析 Match JSON 获取 Host
    /// </summary>
    public string? GetHost()
    {
        if (string.IsNullOrEmpty(MatchJson))
            return null;

        try
        {
            var match = JsonSerializer.Deserialize<RouteMatchJson>(MatchJson);
            return match?.Hosts?.FirstOrDefault();
        }
        catch
        {
            return null;
        }
    }
}

/// <summary>
/// 路由匹配 JSON 结构
/// </summary>
public class RouteMatchJson
{
    public string? Path { get; set; }
    public List<string>? Methods { get; set; }
    public List<string>? Hosts { get; set; }
}

/// <summary>
/// 网关集群数据库模型
/// </summary>
public class GwClusterModel
{
    public string Id { get; set; } = string.Empty;
    public string ClusterId { get; set; } = string.Empty;
    public string Name { get; set; } = string.Empty;
    public string? Description { get; set; }
    public string? DestinationsJson { get; set; }
    public int Status { get; set; }
    public bool IsDeleted { get; set; }

    /// <summary>
    /// 解析 Destinations JSON
    /// </summary>
    public List<GwDestinationModel> GetDestinations()
    {
        if (string.IsNullOrEmpty(DestinationsJson))
            return [];

        try
        {
            var destinations = JsonSerializer.Deserialize<List<GwDestinationModel>>(DestinationsJson);
            return destinations ?? [];
        }
        catch
        {
            return [];
        }
    }
}

/// <summary>
/// 目标端点模型
/// </summary>
public class GwDestinationModel
{
    public string DestinationId { get; set; } = string.Empty;
    public string Address { get; set; } = string.Empty;
    public string? Health { get; set; }
    public int Weight { get; set; } = 1;
    public int HealthStatus { get; set; } = 1;
    public int Status { get; set; } = 1;
}

/// <summary>
/// 迁移结果报告
/// </summary>
public class MigrationReport
{
    public DateTime StartTime { get; set; }
    public DateTime EndTime { get; set; }
    public int TotalRoutes { get; set; }
    public int SuccessCount { get; set; }
    public int FailedCount { get; set; }
    public int SkippedCount { get; set; }
    public List<MigrationEntry> Entries { get; set; } = [];
    public TimeSpan Duration => EndTime - StartTime;

    public void PrintSummary()
    {
        Console.WriteLine();
        Console.WriteLine("=".PadRight(60, '='));
        Console.WriteLine("迁移报告");
        Console.WriteLine("=".PadRight(60, '='));
        Console.WriteLine($"开始时间: {StartTime:yyyy-MM-dd HH:mm:ss}");
        Console.WriteLine($"结束时间: {EndTime:yyyy-MM-dd HH:mm:ss}");
        Console.WriteLine($"总耗时: {Duration.TotalSeconds:F2} 秒");
        Console.WriteLine("-".PadRight(60, '-'));
        Console.WriteLine($"总路由数: {TotalRoutes}");
        Console.WriteLine($"成功: {SuccessCount}");
        Console.WriteLine($"失败: {FailedCount}");
        Console.WriteLine($"跳过: {SkippedCount}");
        Console.WriteLine("=".PadRight(60, '='));

        if (FailedCount > 0)
        {
            Console.WriteLine();
            Console.WriteLine("失败详情:");
            foreach (var entry in Entries.Where(e => e.Status == MigrationStatus.Failed))
            {
                Console.WriteLine($"  - {entry.ServiceName}: {entry.ErrorMessage}");
            }
        }
    }
}

/// <summary>
/// 迁移条目
/// </summary>
public class MigrationEntry
{
    public string ServiceName { get; set; } = string.Empty;
    public string TenantCode { get; set; } = string.Empty;
    public string ClusterId { get; set; } = string.Empty;
    public string OutputPath { get; set; } = string.Empty;
    public MigrationStatus Status { get; set; }
    public string? ErrorMessage { get; set; }
}

/// <summary>
/// 迁移状态
/// </summary>
public enum MigrationStatus
{
    Success,
    Failed,
    Skipped
}

/// <summary>
/// K8s Service YAML 模型
/// </summary>
public class K8sServiceModel
{
    public string ApiVersion { get; set; } = "v1";
    public string Kind { get; set; } = "Service";
    public K8sMetadata Metadata { get; set; } = new();
    public K8sSpec Spec { get; set; } = new();
}

public class K8sMetadata
{
    public string Name { get; set; } = string.Empty;
    public Dictionary<string, string> Labels { get; set; } = new();
    public Dictionary<string, string>? Annotations { get; set; }
}

public class K8sSpec
{
    public string Type { get; set; } = "ClusterIP";
    public Dictionary<string, string> Selector { get; set; } = new();
    public List<K8sPort> Ports { get; set; } = [];
}

public class K8sPort
{
    public int Port { get; set; }
    public int TargetPort { get; set; }
    public string? Name { get; set; }
    public string? Protocol { get; set; }
}