using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Data.SqlClient;

using Server.Services;
using SpaceRace.Shared;

namespace Server.Controllers;

[ApiController]
[Route("[controller]")]
public class LapController : ControllerBase {
    private readonly ILogger<LapController> _logger;
    private SpaceRaceDbContext _db;
    private LapTimesService _lapTimes;

    public LapController(
        ILogger<LapController> logger,
        SpaceRaceDbContext db,
        LapTimesService lapTimes
    ){
        _logger = logger;
        _db = db;
        _lapTimes = lapTimes;
    }

    [HttpGet()]
    public IEnumerable<LapDTO> Get() {
        return _db.Laps.Select(c => new LapDTO {
            Id = c.Id,
            UserId = c.UserId,
            Map = c.Map,
            Time = c.Time,
            Created = c.Created,
        });
    }

    [HttpPost()]
    public async Task<LapTimesDTO> Post(LapDTO dto) {
        Lap existing = _db.Laps
            .SingleOrDefault(l => l.UserId == dto.UserId && l.Map == dto.Map);

        Lap NotFaster(Lap e) {
            _logger.LogInformation($"Lap was not a PB.");
            return e;
        }

        Lap UpdateValues(Lap e) => new Lap {
            Id = e.Id,
            UserId = e.UserId,
            Map = e.Map,
            Time = dto.Time,
            Sectors = dto.Sectors,
            Created = DateTimeOffset.Now,
        };

        Lap Create() => new Lap {
            Id = Guid.NewGuid(),
            UserId = dto.UserId,
            Map = dto.Map,
            Time = dto.Time,
            Sectors = dto.Sectors,
            Created = DateTimeOffset.UtcNow,
        };

        Lap v = existing switch {
            null => Create(),
            Lap e when dto.Time < e.Time => UpdateValues(e),
            _ => NotFaster(existing),
        };

        await _db.Laps.Upsert(v).RunAsync();
        return _lapTimes.LapTimes(v.UserId, v.Map);
    }
}