package nl.astraeus.vst

import kotlin.math.max
import kotlin.math.min
import kotlin.math.pow
import kotlin.math.round

/**
 * User: rnentjes
 * Date: 14-11-15
 * Time: 11:50
 */

enum class Note(
  val sharp: String,
  val flat: String
) {
  NONE("---", "---"),
  No02("C--","C--"),
  NO03("C#-","Db-"),
  NO04("D--","D--"),
  NO05("D#-","Eb-"),
  NO06("E--","E--"),
  NO07("F--","F--"),
  NO08("F#-","Gb-"),
  NO09("G--","G--"),
  NO10("G#-","Ab-"),
  NO11("A#-","Bb-"),
  NO12("B--","B--"),
  C0("C-0","C-0"),
  C0s("C#0","Db0"),
  D0("D-0","D-0"),
  D0s("D#0","Eb0"),
  E0("E-0","E-0"),
  F0("F-0","F-0"),
  F0s("F#0","Gb0"),
  G0("G-0","G-0"),
  G0s("G#0","Ab0"),
  A0("A-0","A-0"),
  A0s("A#0","Bb0"),
  B0("B-0","B-0"),
  C1("C-1","C-1"),
  C1s("C#1","Db1"),
  D1("D-1","D-1"),
  D1s("D#1","Eb1"),
  E1("E-1","E-1"),
  F1("F-1","F-1"),
  F1s("F#1","Gb1"),
  G1("G-1","G-1"),
  G1s("G#1","Ab1"),
  A1("A-1","A-1"),
  A1s("A#1","Bb1"),
  B1("B-1","B-1"),
  C2("C-2","C-2"),
  C2s("C#2","Db2"),
  D2("D-2","D-2"),
  D2s("D#2","Eb2"),
  E2("E-2","E-2"),
  F2("F-2","F-2"),
  F2s("F#2","Gb2"),
  G2("G-2","G-2"),
  G2s("G#2","Ab2"),
  A2("A-2","A-2"),
  A2s("A#2","Bb2"),
  B2("B-2","B-2"),
  C3("C-3","C-3"),
  C3s("C#3","Db3"),
  D3("D-3","D-3"),
  D3s("D#3","Eb3"),
  E3("E-3","E-3"),
  F3("F-3","F-3"),
  F3s("F#3","Gb3"),
  G3("G-3","G-3"),
  G3s("G#3","Ab3"),
  A3("A-3","A-3"),
  A3s("A#3","Bb3"),
  B3("B-3","B-3"),
  C4("C-4","C-4"),
  C4s("C#4","Db4"),
  D4("D-4","D-4"),
  D4s("D#4","Eb4"),
  E4("E-4","E-4"),
  F4("F-4","F-4"),
  F4s("F#4","Gb4"),
  G4("G-4","G-4"),
  G4s("G#4","Ab4"),
  A4("A-4","A-4"),
  A4s("A#4","Bb4"),
  B4("B-4","B-4"),
  C5("C-5","C-5"),
  C5s("C#5","Db5"),
  D5("D-5","D-5"),
  D5s("D#5","Eb5"),
  E5("E-5","E-5"),
  F5("F-5","F-5"),
  F5s("F#5","Gb5"),
  G5("G-5","G-5"),
  G5s("G#5","Ab5"),
  A5("A-5","A-5"),
  A5s("A#5","Bb5"),
  B5("B-5","B-5"),
  C6("C-6","C-6"),
  C6s("C#6","Db6"),
  D6("D-6","D-6"),
  D6s("D#6","Eb6"),
  E6("E-6","E-6"),
  F6("F-6","F-6"),
  F6s("F#6","Gb6"),
  G6("G-6","G-6"),
  G6s("G#6","Ab6"),
  A6("A-6","A-6"),
  A6s("A#6","Bb6"),
  B6("B-6","B-6"),
  C7("C-7","C-7"),
  C7s("C#7","Db7"),
  D7("D-7","D-7"),
  D7s("D#7","Eb7"),
  E7("E-7","E-7"),
  F7("F-7","F-7"),
  F7s("F#7","Gb7"),
  G7("G-7","G-7"),
  G7s("G#7","Ab7"),
  A7("A-7","A-7"),
  A7s("A#7","Bb7"),
  B7("B-7","B-7"),
  C8("C-8","C-8"),
  C8s("C#8","Db8"),
  D8("D-8","D-8"),
  D8s("D#8","Eb8"),
  E8("E-8","E-8"),
  F8("F-8","F-8"),
  F8s("F#8","Gb8"),
  G8("G-8","G-8"),
  G8s("G#8","Ab8"),
  A8("A-8","A-8"),
  A8s("A#8","Bb8"),
  B8("B-8","B-8"),
  C9("C-9","C-9"),
  C9s("C#9","Db9"),
  D9("D-9","D-9"),
  D9s("D#9","Eb9"),
  E9("E-9","E-9"),
  F9("F-9","F-9"),
  F9s("F#9","Gb9"),
  G9("G-9","G-9"),
  // out of midi range
  //G9s("G#9","Ab9"),
  //A9("A-9","A-9"),
  //A9s("A#9","Bb9"),
  //B9("B-9","B-9"),
  UP("^^^","^^^"),
  END("XXX","XXX"),
  ;

  // 69 = A4.ordinal
  val freq: Double = round(440.0 * 2.0.pow((ordinal - 69)/12.0) * 100.0) / 100.0
  val cycleLength: Double = 1.0 / freq
  var sampleDelta: Double = 0.0

  fun transpose(semiNotes: Int): Note = if (ordinal >= C0.ordinal && ordinal <= G9.ordinal) {
    var result = this.ordinal + semiNotes

    result = min(result, G9.ordinal)
    result = max(result, C0.ordinal)

    fromMidi(result)
  } else {
    this
  }

  companion object {
    fun fromMidi(midi: Int): Note {
      // todo: add check
      return entries[midi]
    }

    fun updateSampleRate(rate: Int) {
      println("Setting sample rate to $rate")
      for (note in Note.entries) {
        note.sampleDelta = (1.0 / rate.toDouble()) / note.cycleLength
      }
    }
  }
}

// freq = 10Hz
// cycleLength = 0.1
// sampleRate = 48000
// sampleDelta = 4800

// (1.0 / freq) * sampleRate