import QtQuick
import QtQuick.Effects
import Quickshell
import Quickshell.Wayland
import qs.Commons
import qs.Services
import "Backgrounds" as Backgrounds

// All panels
import qs.Modules.Bar
import qs.Modules.Panels.Audio
import qs.Modules.Panels.Battery
import qs.Modules.Panels.Bluetooth
import qs.Modules.Panels.Calendar
import qs.Modules.Panels.ControlCenter
import qs.Modules.Panels.Launcher
import qs.Modules.Panels.NotificationHistory
import qs.Modules.Panels.SessionMenu
import qs.Modules.Panels.Settings
import qs.Modules.Panels.SetupWizard
import qs.Modules.Panels.Tray
import qs.Modules.Panels.Wallpaper
import qs.Modules.Panels.WiFi


/**
 * MainScreen - Single PanelWindow per screen that manages all panels and the bar
 */
PanelWindow {
  id: root

  // Expose panels as readonly property aliases
  readonly property alias audioPanel: audioPanel
  readonly property alias batteryPanel: batteryPanel
  readonly property alias bluetoothPanel: bluetoothPanel
  readonly property alias calendarPanel: calendarPanel
  readonly property alias controlCenterPanel: controlCenterPanel
  readonly property alias launcherPanel: launcherPanel
  readonly property alias notificationHistoryPanel: notificationHistoryPanel
  readonly property alias sessionMenuPanel: sessionMenuPanel
  readonly property alias settingsPanel: settingsPanel
  readonly property alias setupWizardPanel: setupWizardPanel
  readonly property alias trayDrawerPanel: trayDrawerPanel
  readonly property alias trayMenuPanel: trayMenuPanel
  readonly property alias wallpaperPanel: wallpaperPanel
  readonly property alias wifiPanel: wifiPanel

  Component.onCompleted: {
    Logger.d("MainScreen", "Initialized for screen:", screen?.name, "- Dimensions:", screen?.width, "x", screen?.height, "- Position:", screen?.x, ",", screen?.y)
  }

  // Debug: Log mask region changes
  onMaskChanged: {
    Logger.d("MainScreen", "Mask changed!")
    Logger.d("MainScreen", "  Bar region:", barLoader.item?.barRegion)
    Logger.d("MainScreen", "  Panel count:", panelsRepeater.count)
    for (var i = 0; i < panelsRepeater.count; i++) {
      var panelItem = panelsRepeater.itemAt(i)?.item
      Logger.d("MainScreen", "  Panel", i, "- open:", panelItem?.isPanelOpen, "- region:", panelItem?.panelRegion)
    }
  }

  // Wayland
  // Always use Exclusive keyboard focus when a panel is open
  // This ensures all keyboard shortcuts work reliably (Escape, etc.)
  // The centralized shortcuts in this window handle delegation to panels
  WlrLayershell.keyboardFocus: root.isPanelOpen ? WlrKeyboardFocus.Exclusive : WlrKeyboardFocus.None
  WlrLayershell.layer: Settings.data.ui.panelsOverlayLayer ? WlrLayer.Overlay : WlrLayer.Top
  WlrLayershell.namespace: "noctalia-screen-" + (screen?.name || "unknown")
  WlrLayershell.exclusionMode: ExclusionMode.Ignore // Don't reserve space - BarExclusionZone handles that

  anchors {
    top: true
    bottom: true
    left: true
    right: true
  }

  // Desktop dimming when panels are open
  property bool dimDesktop: Settings.data.general.dimDesktop
  property bool isPanelOpen: PanelService.openedPanel !== null
  color: {
    if (dimDesktop && isPanelOpen) {
      return Qt.alpha(Color.mSurfaceVariant, Style.opacityHeavy)
    }
    return Color.transparent
  }

  Behavior on color {
    ColorAnimation {
      duration: Style.animationNormal
      easing.type: Easing.OutQuad
    }
  }

  // Fully reactive mask system, make everything click-through except bar and open panels
  mask: Region {
    id: clickableMask

    // Cover entire window (everything is masked/click-through)
    x: 0
    y: 0
    width: root.width
    height: root.height
    intersection: Intersection.Xor

    // Direct binding to Variants.instances plus additional regions
    regions: panelRegions.instances.concat([barMaskRegion, backgroundMaskRegion])

    // Bar region - subtract bar area from mask
    Region {
      id: barMaskRegion
      property var barRegion: barLoader.item?.barRegion

      x: barRegion?.x ?? 0
      y: barRegion?.y ?? 0
      width: barRegion?.width ?? 0
      height: barRegion?.height ?? 0
      intersection: Intersection.Subtract
    }

    // Background region for click-to-close - reactive sizing
    Region {
      id: backgroundMaskRegion
      x: 0
      y: 0
      width: root.isPanelOpen ? root.width : 0
      height: root.isPanelOpen ? root.height : 0
      intersection: Intersection.Subtract
    }
  }

  // Variants for panel regions
  Variants {
    id: panelRegions

    // Model is the list of open panels (filters out closed ones)
    model: [audioPanel, controlCenterPanel, calendarPanel].filter(function (p) {
      return p && p.isPanelOpen
    })

    Region {
      required property var modelData
      property var panelBg: modelData.panelRegion

      // Direct bindings
      x: panelBg?.x ?? 0
      y: panelBg?.y ?? 0
      width: panelBg?.width ?? 0
      height: panelBg?.height ?? 0
      intersection: Intersection.Subtract
    }
  }

  // Container for all UI elements
  Item {
    id: container
    width: root.width
    height: root.height

    // Unified backgrounds container / unified shadow system
    // Renders all bar and panel backgrounds as ShapePaths within a single Shape
    // This allows the shadow effect to apply to all backgrounds in one render pass
    Backgrounds.AllBackgrounds {
      id: unifiedBackgrounds
      anchors.fill: parent
      bar: barLoader.item?.barItem || null
      windowRoot: root
      z: 0 // Behind all content
    }

    // Background MouseArea for closing panels when clicking outside
    // Active whenever a panel is open - the mask ensures it only receives clicks when panel is open
    MouseArea {
      anchors.fill: parent
      enabled: root.isPanelOpen
      onClicked: {
        if (PanelService.openedPanel) {
          PanelService.openedPanel.close()
        }
      }
      z: 0 // Behind panels and bar
    }

    // ---------------------------------------
    // All panels always exist
    // ---------------------------------------
    AudioPanel {
      id: audioPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "audioPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(audioPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    BatteryPanel {
      id: batteryPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "batteryPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(batteryPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    BluetoothPanel {
      id: bluetoothPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "bluetoothPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(bluetoothPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    ControlCenterPanel {
      id: controlCenterPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "controlCenterPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(controlCenterPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    CalendarPanel {
      id: calendarPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "calendarPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(calendarPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    Launcher {
      id: launcherPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "launcherPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(launcherPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    NotificationHistoryPanel {
      id: notificationHistoryPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "notificationHistoryPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(notificationHistoryPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    SessionMenu {
      id: sessionMenuPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "sessionMenuPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(sessionMenuPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    SettingsPanel {
      id: settingsPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "settingsPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(settingsPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    SetupWizard {
      id: setupWizardPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "setupWizardPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(setupWizardPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    TrayDropdownPanel {
      id: trayDrawerPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "trayDrawerPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(trayDrawerPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    TrayMenuPanel {
      id: trayMenuPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "trayMenuPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(trayMenuPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    WallpaperPanel {
      id: wallpaperPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "wallpaperPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(wallpaperPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    WiFiPanel {
      id: wifiPanel
      screen: root.screen
      z: 50

      Component.onCompleted: {
        objectName = "wifiPanel-" + (screen?.name || "unknown")
        PanelService.registerPanel(wifiPanel)
        Logger.d("MainScreen", "Panel registered:", objectName, "on screen:", screen?.name)
      }
    }

    // Bar (always on top - rendered last in tree, so naturally on top)
    Loader {
      id: barLoader
      asynchronous: false
      sourceComponent: Bar {}
      // Keep bar loaded but hide it when BarService.isVisible is false
      // This allows panels to remain accessible via IPC
      visible: BarService.isVisible

      // Fill parent to provide dimensions for Bar to reference
      anchors.fill: parent

      property ShellScreen screen: root.screen

      onLoaded: {
        Logger.d("MainScreen", "Bar loaded:", item !== null)
        if (item) {
          Logger.d("MainScreen", "Bar screen", item.screen?.name, "size:", item.width, "x", item.height)
          // Bind screen to bar component (use binding for reactivity)
          item.screen = Qt.binding(function () {
            return barLoader.screen
          })
        }
      }
    }
  }

  // Centralized keyboard shortcuts - delegate to opened panel
  // This ensures shortcuts work regardless of panel focus state
  Shortcut {
    sequence: "Escape"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onEscapePressed) {
        PanelService.openedPanel.onEscapePressed()
      } else if (PanelService.openedPanel) {
        PanelService.openedPanel.close()
      }
    }
  }

  Shortcut {
    sequence: "Tab"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onTabPressed) {
        PanelService.openedPanel.onTabPressed()
      }
    }
  }

  Shortcut {
    sequence: "Shift+Tab"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onShiftTabPressed) {
        PanelService.openedPanel.onShiftTabPressed()
      }
    }
  }

  Shortcut {
    sequence: "Up"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onUpPressed) {
        PanelService.openedPanel.onUpPressed()
      }
    }
  }

  Shortcut {
    sequence: "Down"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onDownPressed) {
        PanelService.openedPanel.onDownPressed()
      }
    }
  }

  Shortcut {
    sequence: "Return"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onReturnPressed) {
        PanelService.openedPanel.onReturnPressed()
      }
    }
  }

  Shortcut {
    sequence: "Enter"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onReturnPressed) {
        PanelService.openedPanel.onReturnPressed()
      }
    }
  }

  Shortcut {
    sequence: "Home"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onHomePressed) {
        PanelService.openedPanel.onHomePressed()
      }
    }
  }

  Shortcut {
    sequence: "End"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onEndPressed) {
        PanelService.openedPanel.onEndPressed()
      }
    }
  }

  Shortcut {
    sequence: "PgUp"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onPageUpPressed) {
        PanelService.openedPanel.onPageUpPressed()
      }
    }
  }

  Shortcut {
    sequence: "PgDown"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onPageDownPressed) {
        PanelService.openedPanel.onPageDownPressed()
      }
    }
  }

  Shortcut {
    sequence: "Ctrl+J"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onCtrlJPressed) {
        PanelService.openedPanel.onCtrlJPressed()
      }
    }
  }

  Shortcut {
    sequence: "Ctrl+K"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onCtrlKPressed) {
        PanelService.openedPanel.onCtrlKPressed()
      }
    }
  }

  Shortcut {
    sequence: "Left"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onLeftPressed) {
        PanelService.openedPanel.onLeftPressed()
      }
    }
  }

  Shortcut {
    sequence: "Right"
    enabled: root.isPanelOpen
    onActivated: {
      if (PanelService.openedPanel && PanelService.openedPanel.onRightPressed) {
        PanelService.openedPanel.onRightPressed()
      }
    }
  }
}