using Microsoft.Extensions.Options;
using MyHomePage.Api.Infrastructure.Configuration;
using SqlSugar;

namespace MyHomePage.Api.Infrastructure.Database;

/// <summary>
/// SqlSugar 上下文（单例生命周期）。
/// 根据 <see cref="DatabaseOptions.Provider"/> 自动切换 MySQL / SQLite。
/// </summary>
public class SqlSugarContext : IDisposable
{
    private readonly DatabaseOptions _options;
    public ISqlSugarClient Db { get; }

    public SqlSugarContext(IOptions<DatabaseOptions> options)
    {
        _options = options.Value;
        Db = new SqlSugarScope(BuildConnectionConfig(_options), BuildAopConfig());
    }

    /// <summary>根据配置构建 SqlSugar 连接配置</summary>
    private static ConnectionConfig BuildConnectionConfig(DatabaseOptions options)
    {
        var dbType = options.Provider.Equals("MySql", StringComparison.OrdinalIgnoreCase)
            ? DbType.MySql
            : DbType.Sqlite;

        return new ConnectionConfig
        {
            ConfigId = "default",
            ConnectionString = options.ConnectionString,
            DbType = dbType,
            IsAutoCloseConnection = true,
            InitKeyType = InitKeyType.Attribute,
            // SqlSugar AOP 启用默认值
            MoreSettings = new ConnMoreSettings
            {
                IsAutoRemoveDataCache = true
            }
        };
    }

    /// <summary>配置 AOP：日志 + 性能监控</summary>
    private static Action<SqlSugarClient> BuildAopConfig() => db =>
    {
        db.Aop.OnLogExecuting = (sql, parameters) =>
        {
            // 由 Serilog / 默认 logger 接管，避免在控制台双打
            // 这里只做轻量占位，实际日志由 SqlSugarScopeClientConfiguration 注入的 logger 输出
        };
    };

    public void Dispose()
    {
        Db?.Dispose();
        GC.SuppressFinalize(this);
    }
}