using System.Collections.Generic;
using System.Threading.Tasks;

namespace Erp.SqlQueryManager.Domain.Services;

/// <summary>
/// Result of SQL query execution
/// </summary>
public class SqlExecutionResult
{
    public bool Success { get; set; }
    public string Message { get; set; }
    public IEnumerable<dynamic> Data { get; set; }
    public int RowsAffected { get; set; }
    public long ExecutionTimeMs { get; set; }
    public Dictionary<string, object> Metadata { get; set; }

    public SqlExecutionResult()
    {
        Metadata = new Dictionary<string, object>();
    }
}

/// <summary>
/// Service for executing SQL commands
/// </summary>
public interface ISqlExecutorService
{
    /// <summary>
    /// Execute a SELECT query and return results
    /// </summary>
    Task<SqlExecutionResult> ExecuteQueryAsync(
        string sql, 
        string dataSourceCode, 
        Dictionary<string, object> parameters = null);
    
    /// <summary>
    /// Execute a non-query command (INSERT, UPDATE, DELETE)
    /// </summary>
    Task<SqlExecutionResult> ExecuteNonQueryAsync(
        string sql, 
        string dataSourceCode, 
        Dictionary<string, object> parameters = null);
    
    /// <summary>
    /// Execute scalar query (returns single value)
    /// </summary>
    Task<SqlExecutionResult> ExecuteScalarAsync<T>(
        string sql, 
        string dataSourceCode, 
        Dictionary<string, object> parameters = null);
    
    /// <summary>
    /// Deploy stored procedure to database
    /// </summary>
    Task<SqlExecutionResult> DeployStoredProcedureAsync(
        string procedureBody, 
        string dataSourceCode);
    
    /// <summary>
    /// Deploy view to database
    /// </summary>
    Task<SqlExecutionResult> DeployViewAsync(
        string viewDefinition, 
        string dataSourceCode);
    
    /// <summary>
    /// Deploy function to database
    /// </summary>
    Task<SqlExecutionResult> DeployFunctionAsync(
        string functionBody, 
        string dataSourceCode);
    
    /// <summary>
    /// Check if database object exists
    /// </summary>
    Task<bool> CheckObjectExistsAsync(
        string objectName, 
        string objectType, 
        string dataSourceCode,
        string schemaName = "dbo");
    
    /// <summary>
    /// Drop database object
    /// </summary>
    Task<SqlExecutionResult> DropObjectAsync(
        string objectName, 
        string objectType, 
        string dataSourceCode,
        string schemaName = "dbo");
    
    /// <summary>
    /// Validate SQL syntax (basic validation)
    /// </summary>
    Task<(bool IsValid, string ErrorMessage)> ValidateSqlAsync(string sql);
}