using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.IO;
using YY.Admin.Core.Util;

namespace YY.Admin.Services.Service.EquipmentDb;

/// <summary>
/// 设备库（SQL Server 中间库）本地连接配置。
/// </summary>
public static class EquipmentDbSettingsStore
{
    public class EquipmentDbSettings
    {
        public bool Enabled { get; set; } = true;
        public string DeviceId { get; set; } = string.Empty;
        public string ServerHost { get; set; } = "127.0.0.1";
        public int ServerPort { get; set; } = 1433;
        public string DbName { get; set; } = "MES_ShareDB";
        public string Username { get; set; } = "sa";
        public string Password { get; set; } = string.Empty;
        public int ConnectTimeoutSeconds { get; set; } = 15;
    }

    public static string GetUserConfigPath()
    {
        var dir = AppWritablePaths.EnsureDirectoryExists(AppWritablePaths.ConfigurationDirectory);
        return Path.Combine(dir, "equipment-db.json");
    }

    public static EquipmentDbSettings Load()
    {
        var path = GetUserConfigPath();
        if (!File.Exists(path))
        {
            return new EquipmentDbSettings
            {
                DeviceId = Environment.MachineName
            };
        }
        try
        {
            var settings = JsonConvert.DeserializeObject<EquipmentDbSettings>(File.ReadAllText(path))
                           ?? new EquipmentDbSettings();
            if (string.IsNullOrWhiteSpace(settings.DeviceId))
            {
                settings.DeviceId = Environment.MachineName;
            }
            return settings;
        }
        catch
        {
            return new EquipmentDbSettings { DeviceId = Environment.MachineName };
        }
    }

    public static void Save(EquipmentDbSettings settings)
    {
        if (settings == null)
        {
            throw new ArgumentNullException(nameof(settings));
        }
        if (string.IsNullOrWhiteSpace(settings.DeviceId))
        {
            settings.DeviceId = Environment.MachineName;
        }
        var path = GetUserConfigPath();
        File.WriteAllText(path, JsonConvert.SerializeObject(settings, Formatting.Indented));
    }

    public static string BuildConnectionString(EquipmentDbSettings s)
    {
        var timeout = s.ConnectTimeoutSeconds > 0 ? s.ConnectTimeoutSeconds : 15;
        return $"Server={s.ServerHost},{s.ServerPort};Database={s.DbName};User Id={s.Username};Password={s.Password};" +
               $"Encrypt=False;TrustServerCertificate=True;Connect Timeout={timeout};";
    }

    /// <summary>
    /// 从 bundled appsettings 的 EquipmentDb 节点合并默认值（若有）。
    /// </summary>
    public static EquipmentDbSettings LoadMergedWithAppSettings(JObject? root)
    {
        var settings = Load();
        if (root?["EquipmentDb"] is not JObject eq)
        {
            return settings;
        }
        if (string.IsNullOrWhiteSpace(settings.ServerHost) || settings.ServerHost == "127.0.0.1")
        {
            settings.ServerHost = eq.Value<string>("ServerHost") ?? settings.ServerHost;
        }
        if (settings.ServerPort == 1433 && eq.Value<int?>("ServerPort") is int p)
        {
            settings.ServerPort = p;
        }
        if (string.IsNullOrWhiteSpace(settings.DbName) || settings.DbName == "MES_ShareDB")
        {
            settings.DbName = eq.Value<string>("DbName") ?? settings.DbName;
        }
        if (string.IsNullOrWhiteSpace(settings.Username) || settings.Username == "sa")
        {
            settings.Username = eq.Value<string>("Username") ?? settings.Username;
        }
        if (string.IsNullOrWhiteSpace(settings.Password))
        {
            settings.Password = eq.Value<string>("Password") ?? settings.Password;
        }
        return settings;
    }
}