using Server.WatchBody.Core.Dal.Src.Domain;
using Server.WatchBody.Core.Dal.Src.Repository;

namespace Server.WatchBody.Import;

/// <summary>
/// Запись фактов в src.workout (spec 02 m06): дедуп по fit_file_id,
/// сопоставление телефонной тренировке ± 15 минут (Ф-8.4), иначе
/// строка «только .fit». 🛡 Телефонные поля не меняются; записи только
/// в facts_json/avg_hr/hr_recovery_s/fit_file_id.
/// </summary>
public class WorkoutImporter(
    IWorkoutRepository workouts,
    decimal restingHrSitting = 90)
{
    public Guid Import(int athleteId, ActivityFacts facts)
    {
        var day = DateOnly.FromDateTime(facts.StartedAt);
        var candidates = workouts.Select(new WorkoutFilter
        {
            AthleteId = athleteId,
            DateFrom = day.AddDays(-1),
            DateTo = day.AddDays(1),
        }).ToList();

        // 1. дедуп: тот же fit_file_id — пропуск (🛡3)
        var sameFile = candidates.FirstOrDefault(w => w.FitFileId == facts.FitFileId);
        if (sameFile != null) return sameFile.Id;

        // 2. сопоставление: ближайшая без fit_file_id в окне ± 15 минут
        var match = candidates
            .Where(w => w.FitFileId == null)
            .Select(w => (workout: w, gap: Math.Abs((w.StartedAt - facts.StartedAt).TotalMinutes)))
            .Where(x => x.gap <= 15)
            .OrderBy(x => x.gap)
            .ThenBy(x => x.workout.Id)
            .FirstOrDefault();

        if (match.workout != null)
        {
            var existing = match.workout;
            workouts.Update(athleteId, new Workout
            {
                Id = existing.Id,
                AthleteId = athleteId,
                ProgramVersionId = existing.ProgramVersionId,
                StartedAt = existing.StartedAt,
                EndedAt = existing.EndedAt,
                Status = existing.Status,
                SessionKind = existing.SessionKind,
                AvgHr = facts.AvgHr ?? existing.AvgHr,
                FactsJson = facts.FactsJson,
                FitFileId = facts.FitFileId,
                HrRecoveryS = facts.HrRecoveryS ?? existing.HrRecoveryS,
                Sets = [],
                Commands = [],
            });
            return existing.Id;
        }

        // 3. строка «только .fit» (uuid генерирует сервер, Р2-Б);
        // workout_insert fit-полей не принимает — вставка + дозакрытие
        // (как sync, errata m02)
        var id = Guid.NewGuid();
        workouts.Insert(athleteId, new Workout
        {
            Id = id, AthleteId = athleteId, StartedAt = facts.StartedAt,
            Status = "finished", SessionKind = "normal", Sets = [], Commands = [],
        });
        workouts.Update(athleteId, new Workout
        {
            Id = id, AthleteId = athleteId, StartedAt = facts.StartedAt,
            Status = "finished", SessionKind = "normal",
            AvgHr = facts.AvgHr,
            FactsJson = facts.FactsJson,
            FitFileId = facts.FitFileId,
            HrRecoveryS = facts.HrRecoveryS,
            Sets = [], Commands = [],
        });
        return id;
    }
}