using ErrorOr;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.Extensions.Logging;
using MuiCharts.Domain.Models;
using MuiCharts.Domain.Repositories;

namespace MuiCharts.Infrastructure.Repositories;

/// <summary>
/// Represents a repository for points.
/// </summary>
/// <param name="context">The data context.</param>
/// <param name="logger">The logger.</param>
public class PointRepository(
	DataContext context,
	ILogger<PointRepository> logger
) : IPointRepository
{
	private readonly DataContext _context = context;
	private readonly ILogger<PointRepository> _logger = logger;

	/// <inheritdoc/>
	public async Task<ErrorOr<Point?>> AddOrUpdatePointAsync(Point point)
	{
		try
		{
			_logger.LogInformation("Adding or updating point {point}", point);

			bool doesExist = _context.Points.Any(p => p.Id == point.Id);

			if (doesExist)
			{
				_logger.LogInformation("Point {id} exists, updating", point.Id);
				_context.Points.Update(point);
				await _context.SaveChangesAsync();
				return (Point?)null;
			}
			else
			{
				_logger.LogInformation("Point {id} does not exist, adding", point.Id);
				EntityEntry<Point> result = _context.Points.Add(point);
				await _context.SaveChangesAsync();

				return result.Entity;
			}
		}
		catch (Exception e)
		{
			_logger.LogError(e, "Error adding or updating point {point}", point);
			return Error.Failure();
		}
	}

	/// <inheritdoc/>
	public async Task<ErrorOr<Point>> AddPointAsync(Point point)
	{
		try
		{
			_logger.LogInformation("Adding or updating point {point}", point);
			EntityEntry<Point> result = await _context.Points.AddAsync(point);
			await _context.SaveChangesAsync();

			return result.Entity;
		}
		catch (Exception e)
		{
			_logger.LogError(e, "Error adding point {point}", point);
			return Error.Failure();
		}
	}

	/// <inheritdoc/>
	public async Task<ErrorOr<Deleted>> DeletePointAsync(int id)
	{
		try
		{
			_logger.LogInformation("Deleting point {id}", id);

			Point? point = await _context.Points.FindAsync(id);

			if (point == null)
				return Error.NotFound();

			_context.Points.Remove(point);
			await _context.SaveChangesAsync();

			return Result.Deleted;
		}
		catch (Exception e)
		{
			_logger.LogError(e, "Error deleting point {id}", id);
			return Error.Failure();
		}
	}

	/// <inheritdoc/>
	public async Task<ErrorOr<Point>> GetPointAsync(int id)
	{
		try
		{
			_logger.LogInformation("Getting point {id}", id);

			Point? point = await _context.Points.FindAsync(id);

			if (point == null)
				return Error.NotFound();

			return point;
		}
		catch (Exception e)
		{
			_logger.LogError(e, "Error getting point {id}", id);
			return Error.Failure();
		}
	}

	/// <inheritdoc/>
	public Task<IQueryable<Point>> GetPointsRangeAsync()
	{
		return Task.FromResult(_context.Points.AsQueryable());
	}
}