using System.Data;
using Dapper;
using SIGCM.Application.DTOs;
using SIGCM.Domain.Entities;
using SIGCM.Domain.Interfaces;
using SIGCM.Infrastructure.Data;

namespace SIGCM.Infrastructure.Repositories;

public class ListingRepository : IListingRepository
{
    private readonly IDbConnectionFactory _connectionFactory;

    public ListingRepository(IDbConnectionFactory connectionFactory)
    {
        _connectionFactory = connectionFactory;
    }

    public async Task<int> CreateAsync(Listing listing, Dictionary<int, string> attributes)
    {
        using var conn = _connectionFactory.CreateConnection();
        conn.Open();
        using var transaction = conn.BeginTransaction();

        try
        {
            var sqlListing = @"
                INSERT INTO Listings (CategoryId, OperationId, Title, Description, Price, Currency, CreatedAt, Status, UserId)
                VALUES (@CategoryId, @OperationId, @Title, @Description, @Price, @Currency, @CreatedAt, @Status, @UserId);
                SELECT CAST(SCOPE_IDENTITY() as int);";

            var listingId = await conn.QuerySingleAsync<int>(sqlListing, listing, transaction);

            if (attributes != null && attributes.Any())
            {
                var sqlAttr = @"
                    INSERT INTO ListingAttributeValues (ListingId, AttributeDefinitionId, Value)
                    VALUES (@ListingId, @AttributeDefinitionId, @Value)";

                foreach (var attr in attributes)
                {
                    await conn.ExecuteAsync(sqlAttr, new { ListingId = listingId, AttributeDefinitionId = attr.Key, Value = attr.Value }, transaction);
                }
            }

            transaction.Commit();
            return listingId;
        }
        catch
        {
            transaction.Rollback();
            throw;
        }
    }

    public async Task<Listing?> GetByIdAsync(int id)
    {
        using var conn = _connectionFactory.CreateConnection();
        return await conn.QuerySingleOrDefaultAsync<Listing>("SELECT * FROM Listings WHERE Id = @Id", new { Id = id });
    }

    public async Task<IEnumerable<Listing>> GetAllAsync()
    {
        using var conn = _connectionFactory.CreateConnection();
         // A simple query for now
        var sql = @"
            SELECT l.* 
            FROM Listings l
            ORDER BY l.CreatedAt DESC";
        
        return await conn.QueryAsync<Listing>(sql);
    }
}