// Application Detail Model - stores parsed GPS and application data from SatLoc logs
const mongoose = require('mongoose'),
  Schema = mongoose.Schema;

const schema = new Schema({
  appId: { type: Schema.Types.ObjectId, ref: 'Application', required: false }, // TODO: to be removed later
  fileId: { type: Schema.Types.ObjectId, ref: 'AppFile', required: true },

  /* Stored in Unix timestamp in seconds since epoch
   AG-NAV: Use Date from the AgNav file name and GPS Time in seconds of day from recorded data n*t or shape files
   SatLoc: converted from SatLoc local time using GMT offset in the GMT Offset field of System Setup (100) record in the log file
  */
  gpsTime: { type: Number, default: 0 },
  lat: { type: Number, required: true },  // Latitude in decimal degrees
  lon: { type: Number, required: true },  // Longitude in decimal degrees
  tslu: { type: Number, default: 0 },     // Time since last update in seconds for GPS differential correction
  llnum: { type: Number, default: 0 },    // Lock/Spray line number
  xTrack: { type: Number, default: 0 },   // Cross track error in meters
  grSpeed: { type: Number, default: 0 },  // Ground speed in m/s
  alt: { type: Number, default: 0 },      // Altitude (above sea level) in meters
  timeAdv: { type: Number, default: 0 },  // In secs to compensate GPS & system lag
  utmX: { type: Number, default: 0 },     // X in meter, UTM coordinates
  utmY: { type: Number, default: 0 },     // Y in meter, UTM coordinates
  swath: { type: Number, default: 0 },    // Swath width in meters
  noAC: { type: Number, default: 0 },     // Aircraft Number in a fleet mission. Not use
  sprayStat: { type: Number, alias: 'spray', default: 0 }, // 0 = Spray off, 1 = Spray on, 2 = Spray on (alt flag), 3 = Spray segment START marker (anchors prevUTM_X/Y for next distance/area calc; not actual application data)
  head: { type: Number, default: 0 },     // GPS Heading in degrees
  stdHdop: { type: Number, default: 0 },  // Standard HDOP
  satsIn: { type: Number, default: 0 },   // Satellites in view & AC position
  lminApp: { type: Number, default: 0 },  // Litre/minute Applied Rate
  lminReq: { type: Number, default: 0 },  // Litre/minute Required Rate
  lhaReq: { type: Number, default: 0 },   // Litre/ha or Kg/ha Required Rate
  sens: { type: Number, default: 0 },     // Flow sensor or Flow controller type. i.e.: 107 is AgFlow
  calcodeFreq: { type: Number, default: 0 }, // Calibration code for spray offset
  // fmId: { type: Number, default: 0 },
  sprayHeight: { type: Number, default: 0 },  // Flight Master (FM), Spray height in meters
  windSpd: { type: Number, default: 0 },  // Wind speed in m/s
  windDir: { type: Number, default: 0 },  // Wind direction in degrees
  temp: { type: Number, default: 0 },     // Temperature in Celsius
  humid: { type: Number, default: 0 },    // Humidity in percentage
  driftX: { type: Number, default: 0 },   // FM, Drift offset in X direction (meters)
  driftY: { type: Number, default: 0 },   // FM, Drift offset in Y direction (meters)
  depositX: { type: Number, default: 0 }, // FM, Deposit offset in X direction (meters)
  depositY: { type: Number, default: 0 }, // FM, Deposit offset in Y direction (meters)

  // Data from RPM 3rd-byte-header 06 records
  applicRate: { type: Number, default: 0 },
  rpm: { type: [Number] },                // For RPM values from Granular FC (FBFB-06 RPM record)
  psi: { type: Number, default: 0 },      // Booms pressure (psi) when using a pressure sensor
  gpsAlt: { type: Number, default: 0 },
  radarAlt: { type: Number, default: 0 },
  raserAlt: { type: Number, default: 0 },
  weight: { type: Number, default: 0 },   // Kg

  // Sept 2025, added after reviewing & matching SatLoc log data
  valvePos: { type: Number, default: 0 }, // Valve position (in percentage ?)
  satCount: { type: Number, default: 0 }, // Number of satellites tracked
  baroPsi: { type: Number, default: 0 },  // Barometric pressure (psi) in kPa
  tachTime: { type: Number, default: 0 },  // Engine current hours, Tachometer
  tachTotalTime: { type: Number, default: 0 },  // Engine total hours, Tachometer
  gmtOffset: { type: Number, default: 0 },  // GMT Offset in minutes

  windOffsetDir: { type: Number, default: 0 },  // AgDisp Wind offset direction in degrees
  appWindOffset: { type: Number, default: 0 },  // AgDisp Applied offset in meters
  gdop: { type: Number, default: 0 }            // GDOP value from GPS status

  // Note: createdDate removed - use _id.getTimestamp() for creation time
  // Saves 8GB+ storage on billion+ documents and eliminates redundant index (14+GB on billion+ documents)
});

// Optimized indexes for billion+ document scale
// Primary index - covers 95% of queries: find by fileId, fileId $in operations
schema.index({ fileId: 1 }, { background: true });

// Note: Removed createdDate index since time-based queries use _id ranges
// Use createObjectIdFromDate() for time-based filtering by _id

// Note:
// The fileId index alone covers most queries efficiently
// For time-based queries, use _id ranges with ObjectId.createFromTime()

module.exports = mongoose.model('Application_Detail', schema);