// api_v1/scanner/parseActivityFile.js
const path = require('path');

// Parser specifici
const parseFit = require('./parsers/parseFit');
const parseGpx = require('./parsers/parseGpx');
const parseTcx = require('./parsers/parseTcx');

// ---------------------------------------------------------
// parseActivityFile → rileva tipo e chiama parser specifico
// ---------------------------------------------------------
async function parseActivityFile(absPath) {
  const ext = path.extname(absPath).toLowerCase();

  let parsed;

  if (ext === '.fit') {
    parsed = await parseFit(absPath);
  } else if (ext === '.gpx') {
    parsed = await parseGpx(absPath);
  } else if (ext === '.tcx') {
    parsed = await parseTcx(absPath);
  } else {
    throw new Error(`Formato attività non supportato: ${ext}`);
  }

  // ---------------------------------------------------------
  // Normalizzazione campi base
  // ---------------------------------------------------------
  const fileName = path.basename(absPath);
  const fileExtension = ext.replace('.', '');

  return {
    file_name: fileName,
    file_extension: fileExtension,
    format: parsed.format || fileExtension.toUpperCase(),

    display_name: parsed.display_name || fileName,
    route_name: parsed.route_name || null,
    title: parsed.title || null,
    description: parsed.description || null,
    notes: parsed.notes || null,

    sport: parsed.sport || null,
    activity_type: parsed.activity_type || null,
    device_manufacturer: parsed.device_manufacturer || null,
    device_model: parsed.device_model || null,
    source_app: parsed.source_app || null,

    start_time_millis: parsed.start_time_millis ?? null,
    end_time_millis: parsed.end_time_millis ?? null,
    duration_millis: parsed.duration_millis ?? null,

    distance_meters: parsed.distance_meters ?? null,
    elevation_gain_meters: parsed.elevation_gain_meters ?? null,
    elevation_loss_meters: parsed.elevation_loss_meters ?? null,

    min_elevation_meters: parsed.min_elevation_meters ?? null,
    max_elevation_meters: parsed.max_elevation_meters ?? null,

    file_distance_meters: parsed.file_distance_meters ?? null,
    file_elevation_gain_meters: parsed.file_elevation_gain_meters ?? null,

    computed_distance_meters: parsed.computed_distance_meters ?? null,
    computed_elevation_gain_meters: parsed.computed_elevation_gain_meters ?? null,

    average_speed_mps: parsed.average_speed_mps ?? null,
    max_speed_mps: parsed.max_speed_mps ?? null,
    average_pace_sec_per_km: parsed.average_pace_sec_per_km ?? null,

    average_heart_rate: parsed.average_heart_rate ?? null,
    max_heart_rate: parsed.max_heart_rate ?? null,
    average_cadence: parsed.average_cadence ?? null,
    max_cadence: parsed.max_cadence ?? null,

    calories: parsed.calories ?? null,
    power_avg: parsed.power_avg ?? null,
    power_max: parsed.power_max ?? null,

    point_count: parsed.point_count ?? 0,
    segment_count: parsed.segment_count ?? 0,
    lap_count: parsed.lap_count ?? 0,

    min_latitude: parsed.min_latitude ?? null,
    max_latitude: parsed.max_latitude ?? null,
    min_longitude: parsed.min_longitude ?? null,
    max_longitude: parsed.max_longitude ?? null,
    center_latitude: parsed.center_latitude ?? null,
    center_longitude: parsed.center_longitude ?? null,

    tags: parsed.tags || [],

    // IMPORTANTISSIMO: preview percorso per thumb gallery
    track_preview: parsed.track_preview || [],

    diagnostics: parsed.diagnostics || null,
  };
}

module.exports = parseActivityFile;