using Microsoft.EntityFrameworkCore;

using SpaceRace.Shared;

namespace Server.Services;

public class LapTimesService {
    private readonly ILogger<LapTimesService> _logger;
    private SpaceRaceDbContext _db;

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

    public LapTimesDTO LapTimes(Guid userId, string mapName) {
        PbDTO pb = _db.PbDTO
            .FromSql($$"""
                WITH ranked AS (
                    SELECT *, rank() OVER (ORDER BY "Time" ASC) AS "Position", COUNT("Id") OVER () AS "Completions"
                    FROM "Laps"
                    WHERE "Map" = {{mapName}}
                    ORDER BY "Position" ASC
                )

                SELECT * FROM ranked
                WHERE "UserId" = {{userId}}
                """).FirstOrDefault();

        PbDTO lapRecord = _db.PbDTO
            .FromSql($$"""
                SELECT *, rank() OVER (ORDER BY "Time" ASC) AS "Position", COUNT("Id") OVER () AS "Completions"
                FROM "Laps"
                WHERE "Map" = {{mapName}}
                ORDER BY "Position" ASC
                """).FirstOrDefault();

        return new LapTimesDTO {
            Pb = pb,
            LapRecord = lapRecord,
        };
    }
}