using OECS;

namespace Game.TicTacToe;

/// <summary>
/// Minimal CSV loader that creates entities from a CSV file.
///
/// The first row is a header. Each subsequent row creates one entity.
/// Column names are mapped to component fields by convention:
/// a column named "Row" sets Cell.Row, "Col" sets Cell.Col, etc.
///
/// Currently hardcoded for the Cell component. Extend as needed.
/// </summary>
public static class CsvLoader
{
    public static List<Entity> LoadCells(World world, string filePath)
    {
        var entities = new List<Entity>();
        var lines = File.ReadAllLines(filePath);

        if (lines.Length < 2)
            return entities;

        // Parse header to get column indices.
        var headers = lines[0].Split(',');
        int rowIdx = Array.IndexOf(headers, "Row");
        int colIdx = Array.IndexOf(headers, "Col");

        for (int i = 1; i < lines.Length; i++)
        {
            var values = lines[i].Split(',');
            if (values.Length < 2) continue;

            var entity = world.CreateEntity();
            world.AddComponent(entity, new Cell
            {
                Row = int.Parse(values[rowIdx]),
                Col = int.Parse(values[colIdx])
            });
            entities.Add(entity);
        }

        return entities;
    }
}