package nl.astraeus.vst.chip.view

import daw.style.Css
import daw.style.Css.defineCss
import daw.style.Css.noTextSelect
import daw.style.CssId
import daw.style.CssName
import daw.style.hover
import kotlinx.browser.window
import kotlinx.html.*
import kotlinx.html.js.onChangeFunction
import kotlinx.html.js.onClickFunction
import kotlinx.html.js.onInputFunction
import nl.astraeus.css.properties.*
import nl.astraeus.css.style.cls
import nl.astraeus.komp.HtmlBuilder
import nl.astraeus.komp.Komponent
import nl.astraeus.vst.chip.audio.VstChipWorklet
import nl.astraeus.vst.chip.midi.Midi
import org.khronos.webgl.Uint8Array
import org.w3c.dom.HTMLInputElement
import org.w3c.dom.HTMLSelectElement

object MainView : Komponent() {
  private var messages: MutableList<String> = ArrayList()
  private var started = false

  init {
    MainViewCss
  }

  fun addMessage(message: String) {
    messages.add(message)
    while (messages.size > 10) {
      messages.removeAt(0)
    }
    requestUpdate()
  }

  override fun HtmlBuilder.render() {
    div(MainViewCss.MainDivCss.name) {
      if (!started) {
        div(MainViewCss.StartSplashCss.name) {
          div(MainViewCss.StartBoxCss.name) {
            div(MainViewCss.StartButtonCss.name) {
              +"START"
              onClickFunction = {
                started = true
                VstChipWorklet.create {
                  requestUpdate()
                }
              }
            }
          }
        }
      }
      h1 {
        +"VST Chip"
      }
      div {
        span {
          +"Midi input: "
          select {
            option {
              +"None"
              value = "none"
            }
            for (mi in Midi.inputs) {
              option {
                +mi.name
                value = mi.id
              }
            }

            onChangeFunction = { event ->
              val target = event.target as HTMLSelectElement
              if (target.value == "none") {
                Midi.setInput(null)
              } else {
                val selected = Midi.inputs.find { it.id == target.value }
                if (selected != null) {
                  Midi.setInput(selected)
                } else if (target.value == "midi-broadcast") {
                  //
                }
              }
            }
          }
        }
        span {
          +"channel:"
          input {
            type = InputType.number
            value = Midi.inputChannel.toString()
            onInputFunction = { event ->
              val target = event.target as HTMLInputElement
              Midi.inputChannel = target.value.toInt()
              println("onInput channel: ${Midi.inputChannel}")
              VstChipWorklet.postMessage("set_channel\n${Midi.inputChannel}")
            }
          }
        }
      }
      div {
        span {
          +"Midi output: "
          select {
            option {
              +"None"
              value = "none"
            }
            for (mi in Midi.outputs) {
              option {
                +mi.name
                value = mi.id
              }
            }

            onChangeFunction = { event ->
              val target = event.target as HTMLSelectElement
              if (target.value == "none") {
                Midi.setOutput(null)
              } else {
                val selected = Midi.outputs.find { it.id == target.value }
                if (selected != null) {
                  Midi.setOutput(selected)
                }
              }
            }
          }
        }
        span {
          +"channel:"
          input {
            type = InputType.number
            value = Midi.outputChannel.toString()
            onInputFunction = { event ->
              val target = event.target as HTMLInputElement
              Midi.outputChannel = target.value.toInt()
            }
          }
        }
      }
      div(MainViewCss.ButtonCss.name) {
        +"Send note on to output"
        onClickFunction = {
          val data = Uint8Array(
            arrayOf(
              0x90.toByte(),
              0x3c.toByte(),
              0x70.toByte()
            )
          )
          Midi.send(data, window.performance.now() + 1000)
          Midi.send(data, window.performance.now() + 2000)
        }
      }
      div(MainViewCss.ButtonCss.name) {
        +"Send note off to output"
        onClickFunction = {
          val data = Uint8Array(
            arrayOf(
              0x90.toByte(),
              0x3c.toByte(),
              0x0.toByte(),
            )
          )
          Midi.send(data)
        }
      }
    }
  }

  object MainViewCss : CssId("main") {
    object MainDivCss : CssName()
    object ActiveCss : CssName()
    object ButtonCss : CssName()
    object NoteBarCss : CssName()
    object StartSplashCss : CssName()
    object StartBoxCss : CssName()
    object StartButtonCss : CssName()

    init {
      defineCss {
        select("*") {
          select("*:before") {
            select("*:after") {
              boxSizing(BoxSizing.borderBox)
            }
          }
        }
        select("html", "body") {
          margin(0.px)
          padding(0.px)
          height(100.prc)
        }
        select("html", "body") {
          backgroundColor(Css.currentStyle.mainBackgroundColor)
          color(Css.currentStyle.mainFontColor)

          fontFamily("JetbrainsMono, monospace")
          fontSize(14.px)
          fontWeight(FontWeight.bold)

          //transition()
          noTextSelect()
        }
        select(cls(ButtonCss)) {
          margin(1.rem)
          padding(1.rem)
          backgroundColor(Css.currentStyle.buttonBackgroundColor)
          borderColor(Css.currentStyle.buttonBorderColor)
          borderWidth(Css.currentStyle.buttonBorderWidth)
          color(Css.currentStyle.mainFontColor)

          hover {
            backgroundColor(Css.currentStyle.buttonBackgroundColor.hover())
          }
        }
        select(cls(ActiveCss)) {
          //backgroundColor(Css.currentStyle.selectedBackgroundColor)
        }
        select(cls(NoteBarCss)) {
          minHeight(4.rem)
        }
        select(cls(MainDivCss)) {
          margin(1.rem)
        }
        select("select") {
          plain("appearance", "none")
          border("0")
          outline("0")
          width(20.rem)
          padding(0.5.rem, 2.rem, 0.5.rem, 0.5.rem)
          backgroundImage("url('https://upload.wikimedia.org/wikipedia/commons/9/9d/Caret_down_font_awesome_whitevariation.svg')")
          background("right 0.8em center/1.4em")
          backgroundColor(Css.currentStyle.inputBackgroundColor)
          //color(Css.currentStyle.entryFontColor)
          borderRadius(0.25.em)
        }
        select(cls(StartSplashCss)) {
          position(Position.fixed)
          left(0.px)
          top(0.px)
          width(100.vw)
          height(100.vh)
          zIndex(100)
          backgroundColor(hsla(32, 0, 50, 0.6))

          select(cls(StartBoxCss)) {
            position(Position.relative)
            left(25.vw)
            top(25.vh)
            width(50.vw)
            height(50.vh)
            backgroundColor(hsla(0, 0, 50, 0.25))

            select(cls(StartButtonCss)) {
              position(Position.absolute)
              left(50.prc)
              top(50.prc)
              transform(Transform("translate(-50%, -50%)"))
              padding(1.rem)
              backgroundColor(Css.currentStyle.buttonBackgroundColor)
              cursor("pointer")
            }
          }
        }
      }
    }
  }

}