import QtQuick
import QtQuick.Controls
import Quickshell
import Quickshell.Io
import qs.Commons
import qs.Ui
import "Model.js" as Model

// Bar pill + popup player for thesinging.bible. Mirrors the site's own
// control set (Book, Chapter, Style, Voice) and transport (loop, prev, -10s,
// play/pause, +10s, next, shuffle). Language is hard-coded to English —
// no Language dropdown, see Model.js FIXED_TRANSLATION. Audio comes
// straight from the site's public R2 bucket
// (https://audio.thesinging.bible/...), no auth needed. Playback goes
// through a single long-lived `mpv --idle` process controlled over its
// JSON IPC unix socket.
BarWidget {
  id: root
  moduleName: "dotjuice.thesinging.bible"

  readonly property string audioBase: "https://audio.thesinging.bible"
  readonly property string manifestUrl: "https://thesinging.bible/manifest.json"
  readonly property string socketPath: (Quickshell.env("XDG_RUNTIME_DIR") || "/tmp") + "/dotjuice-thesinging-bible.sock"
  readonly property string stateDir: Quickshell.env("HOME") + "/.local/state/omarchy/plugins/dotjuice.thesinging.bible"
  readonly property string statePath: stateDir + "/state.json"

  property var manifest: null
  property var selection: null
  property var _pendingSavedState: null
  property bool unavailable: false

  property bool popupOpen: false
  property bool mpvReady: false
  property bool playing: false
  property real positionSec: 0
  property real durationSec: 0
  property bool loopEnabled: false

  readonly property int reqTimePos: 101
  readonly property int reqDuration: 102

  readonly property string trackLabel: !manifest || !selection ? "—"
    : (unavailable ? "No audio available" : Model.trackLabel(manifest, selection))
  readonly property string playIcon: playing ? "󰏤" : "󰐊"

  readonly property var bookOptions: manifest ? Model.optionsForBooks(manifest) : []
  readonly property var styleOptions: manifest ? Model.optionsForStyles(manifest) : []
  readonly property var voiceOptions: manifest ? Model.optionsForVoices(manifest) : []
  readonly property var chapterOptions: (manifest && selection && !unavailable) ? Model.optionsForChapters(manifest, selection) : []

  // PopupCard routes owner.close() back here; without this it would set its
  // own `open` directly and desync from the popupOpen binding below.
  function close() { root.popupOpen = false }

  function formatTime(sec) { return Model.formatTime(sec) }

  function sendMpv(obj) {
    if (!mpvSocket.connected) return
    mpvSocket.write(JSON.stringify(obj) + "\n")
    mpvSocket.flush()
  }

  function handleMpvLine(line) {
    var msg
    try { msg = JSON.parse(line) } catch (e) { return }
    if (msg.request_id === root.reqTimePos) {
      if (typeof msg.data === "number") root.positionSec = msg.data
      return
    }
    if (msg.request_id === root.reqDuration) {
      if (typeof msg.data === "number") root.durationSec = msg.data
      return
    }
    if (msg.event === "end-file") {
      if (msg.reason === "eof") root.handleTrackEnded()
      return
    }
    if (msg.event === "pause") { root.playing = false; return }
    if (msg.event === "unpause") { root.playing = true; return }
  }

  function applySavedOrDefaultState() {
    if (!root.manifest) return
    var desired = root._pendingSavedState || Model.defaultDesired(root.manifest)
    var resolved = Model.resolveSelection(root.manifest, desired)
    root.selection = resolved || Model.defaultDesired(root.manifest)
    root.unavailable = !resolved
    root.positionSec = 0
    root.durationSec = 0
  }

  function saveState() {
    if (!root.selection) return
    stateFile.setText(Model.serializeState(root.selection))
  }

  function loadCurrentTrack(autoplay) {
    if (!root.manifest || !root.selection || root.unavailable) return
    var url = Model.audioUrl(root.audioBase, root.selection)
    root.positionSec = 0
    root.durationSec = 0
    root.sendMpv({ command: ["loadfile", url, "replace"] })
    root.sendMpv({ command: ["set_property", "pause", !autoplay] })
    root.playing = autoplay
    root.saveState()
  }

  // Applies a desired {translation, voice, style, book, chapter} (usually
  // the current selection with one field changed by a dropdown), resolving
  // it to a real playable combo. Falls back to an "unavailable" state
  // (paused, no audio) if this translation/voice/style has nothing at all.
  function applyDesired(desired) {
    var resolved = Model.resolveSelection(root.manifest, desired)
    if (resolved) {
      root.selection = resolved
      root.unavailable = false
      root.loadCurrentTrack(root.playing)
    } else {
      root.selection = { translation: desired.translation, voice: desired.voice, style: desired.style,
        age: (root.selection ? root.selection.age : "adult"), book: desired.book, chapter: desired.chapter }
      root.unavailable = true
      root.playing = false
      root.positionSec = 0
      root.durationSec = 0
      root.sendMpv({ command: ["stop"] })
    }
  }

  function playPause() {
    if (!root.selection || root.unavailable) return
    if (!root.mpvReady) return
    root.playing = !root.playing
    root.sendMpv({ command: ["set_property", "pause", !root.playing] })
  }

  function seekBy(deltaSec) {
    if (!root.selection || root.unavailable) return
    root.sendMpv({ command: ["seek", deltaSec, "relative"] })
  }

  function seekAbsolute(sec) {
    if (!root.selection || root.unavailable) return
    root.sendMpv({ command: ["seek", sec, "absolute"] })
    root.positionSec = sec
  }

  function goNext() {
    if (!root.manifest || !root.selection || root.unavailable) return
    root.selection = Model.neighborChapter(root.manifest, root.selection, 1)
    root.loadCurrentTrack(root.playing)
  }

  function goPrev() {
    if (!root.manifest || !root.selection || root.unavailable) return
    root.selection = Model.neighborChapter(root.manifest, root.selection, -1)
    root.loadCurrentTrack(root.playing)
  }

  function shuffleTrack() {
    if (!root.manifest || !root.selection || root.unavailable) return
    root.selection = Model.randomSelection(root.manifest, root.selection)
    root.loadCurrentTrack(root.playing)
  }

  function handleTrackEnded() {
    if (root.loopEnabled) { root.loadCurrentTrack(true); return }
    root.goNext()
  }

  Component.onCompleted: {
    mkdirProc.running = true
    mpvProc.running = true
    manifestProc.running = true
    stateFile.reload()
  }

  Component.onDestruction: {
    if (mpvSocket.connected) root.sendMpv({ command: ["quit"] })
    if (mpvProc.running) mpvProc.running = false
  }

  Process {
    id: mkdirProc
    command: ["mkdir", "-p", root.stateDir]
  }

  Process {
    id: mpvProc
    command: ["mpv", "--no-video", "--idle=yes", "--really-quiet", "--input-ipc-server=" + root.socketPath]
    onStarted: connectRetryTimer.restart()
    onExited: function(exitCode) {
      root.mpvReady = false
      mpvSocket.connected = false
      connectRetryTimer.stop()
    }
  }

  Timer {
    id: connectRetryTimer
    interval: 300
    repeat: true
    onTriggered: {
      if (mpvSocket.connected) { connectRetryTimer.stop(); return }
      mpvSocket.connected = true
    }
  }

  Timer {
    id: pollTimer
    interval: 500
    repeat: true
    running: root.mpvReady && root.playing
    onTriggered: {
      root.sendMpv({ command: ["get_property", "time-pos"], request_id: root.reqTimePos })
      root.sendMpv({ command: ["get_property", "duration"], request_id: root.reqDuration })
    }
  }

  Timer {
    id: manifestRetryTimer
    interval: 5000
    onTriggered: if (!manifestProc.running) manifestProc.running = true
  }

  Process {
    id: manifestProc
    command: ["curl", "-fsS", "--max-time", "10", root.manifestUrl]
    stdout: StdioCollector {
      waitForEnd: true
      onStreamFinished: {
        var parsed = Model.parseManifest(text)
        if (!parsed) { manifestRetryTimer.restart(); return }
        root.manifest = parsed
        root.applySavedOrDefaultState()
      }
    }
  }

  Socket {
    id: mpvSocket
    path: root.socketPath
    parser: SplitParser {
      splitMarker: "\n"
      onRead: function(line) { root.handleMpvLine(line) }
    }
    onConnectionStateChanged: {
      root.mpvReady = connected
      if (connected && root.selection && !root.unavailable) root.loadCurrentTrack(false)
    }
  }

  FileView {
    id: stateFile
    path: root.statePath
    printErrors: false
    watchChanges: false
    onLoaded: {
      root._pendingSavedState = Model.parseStateFile(text())
      if (root.manifest) root.applySavedOrDefaultState()
    }
    onLoadFailed: {
      root._pendingSavedState = null
      if (root.manifest) root.applySavedOrDefaultState()
    }
  }

  visible: true
  implicitWidth: pillRow.implicitWidth + Style.space(14)
  implicitHeight: barSize

  Row {
    id: pillRow
    anchors.centerIn: parent
    spacing: Style.space(6)

    Text {
      textFormat: Text.PlainText
      text: root.playIcon
      color: root.playing ? root.bar.barForeground : Qt.darker(root.bar.barForeground, 1.5)
      font.family: root.bar.fontFamily
      font.pixelSize: Style.font.body
    }

    Text {
      textFormat: Text.PlainText
      visible: !root.vertical
      text: root.trackLabel
      color: root.bar.barForeground
      font.family: root.bar.fontFamily
      font.pixelSize: Style.font.body
      elide: Text.ElideRight
    }
  }

  MouseArea {
    anchors.fill: parent
    hoverEnabled: true
    cursorShape: Qt.PointingHandCursor
    onClicked: root.popupOpen = !root.popupOpen
    onEntered: if (root.bar) root.bar.showTooltip(root, root.trackLabel)
    onExited: if (root.bar) root.bar.hideTooltip(root)
  }

  PopupCard {
    id: popup
    anchorItem: root
    bar: root.bar
    owner: root
    open: root.popupOpen
    contentWidth: popup.fittedContentWidth(Style.space(320))
    contentHeight: popup.fittedContentHeight(popupColumn.implicitHeight)

    Column {
      id: popupColumn
      anchors.fill: parent
      spacing: Style.spacing.panelGap

      Text {
        textFormat: Text.PlainText
        width: parent.width
        text: !root.manifest ? "Loading…" : root.trackLabel + (root.selection && !root.unavailable
          ? " — " + (Model.optionsForStyles(root.manifest).filter(function(o) { return o.value === root.selection.style })[0] || { label: "" }).label
          : "")
        color: Color.popups.text
        font.family: Style.font.family
        font.pixelSize: Style.font.subtitle
        font.bold: true
        elide: Text.ElideRight
      }

      Row {
        anchors.horizontalCenter: parent.horizontalCenter
        spacing: Style.spacing.controlGap

        Button {
          iconText: "⟲"
          selected: root.loopEnabled
          foreground: Color.popups.text
          tooltipText: "Loop current chapter"
          onClicked: root.loopEnabled = !root.loopEnabled
        }
        Button {
          iconText: "󰒮"
          foreground: Color.popups.text
          tooltipText: "Previous chapter"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.goPrev()
        }
        Button {
          text: "-10s"
          foreground: Color.popups.text
          tooltipText: "Rewind 10 seconds"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.seekBy(-10)
        }
        Button {
          iconText: root.playIcon
          iconSize: Style.font.iconLarge
          foreground: Color.popups.text
          tooltipText: root.playing ? "Pause" : "Play"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.playPause()
        }
        Button {
          text: "+10s"
          foreground: Color.popups.text
          tooltipText: "Forward 10 seconds"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.seekBy(10)
        }
        Button {
          iconText: "󰒭"
          foreground: Color.popups.text
          tooltipText: "Next chapter"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.goNext()
        }
        Button {
          iconText: "⇄"
          foreground: Color.popups.text
          tooltipText: "Play a random chapter"
          enabled: !root.unavailable
          opacity: enabled ? 1.0 : 0.4
          onClicked: root.shuffleTrack()
        }
      }

      Column {
        width: parent.width
        spacing: Style.spacing.xxs

        PanelSlider {
          id: seekSlider
          width: parent.width
          bar: root.bar
          minimum: 0
          maximum: Math.max(1, root.durationSec)
          value: root.positionSec
          onReleased: function(v) { root.seekAbsolute(v) }
        }

        Item {
          width: parent.width
          height: elapsedText.implicitHeight

          Text {
            id: elapsedText
            anchors.left: parent.left
            textFormat: Text.PlainText
            text: root.formatTime(root.positionSec)
            color: Qt.darker(Color.popups.text, 1.3)
            font.family: Style.font.family
            font.pixelSize: Style.font.caption
          }
          Text {
            anchors.right: parent.right
            textFormat: Text.PlainText
            text: root.formatTime(root.durationSec)
            color: Qt.darker(Color.popups.text, 1.3)
            font.family: Style.font.family
            font.pixelSize: Style.font.caption
          }
        }
      }

      PanelSeparator {
        width: parent.width
        foreground: Color.popups.text
      }

      Column {
        width: parent.width
        spacing: Style.spacing.rowGap

        Dropdown {
          id: bookDropdown
          width: parent.width
          label: "Book"
          options: root.bookOptions
          value: root.selection ? root.selection.book : ""
          onChanged: function(v) { root.applyDesired(Object.assign({}, root.selection, { book: v, chapter: 1 })) }
        }
        Dropdown {
          id: chapterDropdown
          width: parent.width
          label: "Chapter"
          options: root.chapterOptions
          value: root.selection ? String(root.selection.chapter) : ""
          onChanged: function(v) { root.applyDesired(Object.assign({}, root.selection, { chapter: parseInt(v, 10) })) }
        }
        Dropdown {
          id: styleDropdown
          width: parent.width
          label: "Style"
          options: root.styleOptions
          value: root.selection ? root.selection.style : ""
          onChanged: function(v) { root.applyDesired(Object.assign({}, root.selection, { style: v })) }
        }
        Dropdown {
          id: voiceDropdown
          width: parent.width
          label: "Voice"
          options: root.voiceOptions
          value: root.selection ? root.selection.voice : ""
          onChanged: function(v) { root.applyDesired(Object.assign({}, root.selection, { voice: v })) }
        }
        // The card's window is sized to popupColumn.implicitHeight, which
        // only covers the collapsed rows — Dropdown's own popup is an
        // overlay that isn't counted, so with nothing after it the last
        // dropdown's open list renders past the window's bottom edge and
        // is clipped away. Reserve room for the tallest possible popup
        // (Dropdown.qml caps at 8 rows) only while one of these four is
        // actually open, so the panel stays compact the rest of the time
        // instead of always carrying that dead space at the bottom.
        Item {
          width: 1
          height: (bookDropdown.popupOpen || chapterDropdown.popupOpen || styleDropdown.popupOpen || voiceDropdown.popupOpen)
            ? (Style.spacing.popupRowHeight * 8 + 7 * Style.spacing.labelGap + Style.spacing.xxs)
            : 0
        }
      }
    }
  }
}