pragma Singleton

pragma ComponentBehavior

import QtQuick
import Quickshell
import Quickshell.Services.Notifications
import Quickshell.Widgets
import qs.Common
import "../Common/markdown2html.js" as Markdown2Html

Singleton {
  id: root

  readonly property list<NotifWrapper> notifications: []
  readonly property list<NotifWrapper> allWrappers: []
  readonly property list<NotifWrapper> popups: allWrappers.filter(n => n.popup)

  property list<NotifWrapper> notificationQueue: []
  property list<NotifWrapper> visibleNotifications: []
  property int maxVisibleNotifications: 3
  property bool addGateBusy: false
  property int enterAnimMs: 400
  property int seqCounter: 0
  property bool bulkDismissing: false

  Timer {
    id: addGate
    interval: enterAnimMs + 50
    running: false
    repeat: false
    onTriggered: {
      addGateBusy = false
      processQueue()
    }
  }

  // Android 16-style grouped notifications
  readonly property var groupedNotifications: getGroupedNotifications()
  readonly property var groupedPopups: getGroupedPopups()

  property var expandedGroups: ({})
  property var expandedMessages: ({})
  property bool popupsDisabled: false

  NotificationServer {
    id: server

    keepOnReload: false
    actionsSupported: true
    actionIconsSupported: true
    bodyHyperlinksSupported: true
    bodyImagesSupported: true
    bodyMarkupSupported: true
    imageSupported: true
    inlineReplySupported: true

    onNotification: notif => {
      notif.tracked = true

      const shouldShowPopup = !root.popupsDisabled && !SessionData.doNotDisturb
      const wrapper = notifComponent.createObject(root, {
                                                    "popup": shouldShowPopup,
                                                    "notification": notif
                                                  })

      if (wrapper) {
        root.allWrappers.push(wrapper)
        root.notifications.push(wrapper)

        if (shouldShowPopup) {
          notificationQueue = [...notificationQueue, wrapper]
          processQueue()
        }
      }
    }
  }

  component NotifWrapper: QtObject {
    id: wrapper

    property bool popup: false
    property bool removedByLimit: false
    property bool isPersistent: true
    property int seq: 0

    onPopupChanged: {
      if (!popup) {
        removeFromVisibleNotifications(wrapper)
      }
    }

    readonly property Timer timer: Timer {
      interval: 5000
      repeat: false
      running: false
      onTriggered: {
        wrapper.popup = false
      }
    }
    readonly property date time: new Date()
    readonly property string timeStr: {
      const now = new Date()
      const diff = now.getTime() - time.getTime()
      const m = Math.floor(diff / 60000)
      const h = Math.floor(m / 60)

      if (h < 1 && m < 1)
      return "now"
      if (h < 1)
      return `${m}m`
      return `${h}h`
    }

    required property Notification notification
    readonly property string summary: notification.summary
    readonly property string body: notification.body
    readonly property string htmlBody: {
      if (body && (body.includes('<') && body.includes('>'))) {
        return body
      }
      return Markdown2Html.markdownToHtml(body)
    }
    readonly property string appIcon: notification.appIcon
    readonly property string appName: {
      if (notification.appName == "") {
        // try to get the app name from the desktop entry
        const entry = DesktopEntries.byId(notification.desktopEntry)
        if (entry && entry.name) {
          return entry.name.toLowerCase()
        }
      }
      return notification.appName || "app"
    }
    readonly property string desktopEntry: notification.desktopEntry
    readonly property string image: notification.image
    readonly property string cleanImage: {
      if (!image)
      return ""
      if (image.startsWith("file://")) {
        return image.substring(7)
      }
      return image
    }
    readonly property int urgency: notification.urgency
    readonly property list<NotificationAction> actions: notification.actions

    readonly property bool hasImage: image && image.length > 0
    readonly property bool hasAppIcon: appIcon && appIcon.length > 0

    readonly property Connections conn: Connections {
      target: wrapper.notification.Retainable

      function onDropped(): void {
        const notifIndex = root.notifications.indexOf(wrapper)
        const allIndex = root.allWrappers.indexOf(wrapper)
        if (allIndex !== -1)
          root.allWrappers.splice(allIndex, 1)
        if (notifIndex !== -1)
          root.notifications.splice(notifIndex, 1)

        if (root.bulkDismissing)
          return

        const groupKey = getGroupKey(wrapper)
        const remainingInGroup = root.notifications.filter(n => getGroupKey(
                                                             n) === groupKey)

        if (remainingInGroup.length <= 1) {
          clearGroupExpansionState(groupKey)
        }

        cleanupExpansionStates()
      }

      function onAboutToDestroy(): void {
        wrapper.destroy()
      }
    }
  }

  Component {
    id: notifComponent
    NotifWrapper {}
  }

  function clearAllNotifications() {
    bulkDismissing = true
    popupsDisabled = true
    addGate.stop()
    addGateBusy = false
    notificationQueue = []

    for (const w of visibleNotifications)
      w.popup = false
    visibleNotifications = []

    const toDismiss = notifications.slice()

    if (notifications.length)
      notifications.splice(0, notifications.length)
    expandedGroups = {}
    expandedMessages = {}

    for (var i = 0; i < toDismiss.length; ++i) {
      const w = toDismiss[i]
      if (w && w.notification) {
        try {
          w.notification.dismiss()
        } catch (e) {

        }
      }
    }

    bulkDismissing = false
    popupsDisabled = false
  }

  function dismissNotification(wrapper) {
    if (!wrapper || !wrapper.notification)
      return
    wrapper.popup = false
    wrapper.notification.dismiss()
  }

  function disablePopups(disable) {
    popupsDisabled = disable
    if (disable) {
      notificationQueue = []
      visibleNotifications = []
      for (const notif of root.allWrappers) {
        notif.popup = false
      }
    }
  }

  function processQueue() {
    if (addGateBusy)
      return
    if (popupsDisabled)
      return
    if (SessionData.doNotDisturb)
      return
    if (notificationQueue.length === 0)
      return

    const next = notificationQueue.shift()

    next.seq = ++seqCounter
    visibleNotifications = [...visibleNotifications, next]
    next.popup = true

    addGateBusy = true
    addGate.restart()
  }

  function removeFromVisibleNotifications(wrapper) {
    const i = visibleNotifications.findIndex(n => n === wrapper)
    if (i !== -1) {
      const v = [...visibleNotifications]
      v.splice(i, 1)
      visibleNotifications = v
      processQueue()
    }
  }

  function releaseWrapper(w) {
    // Remove from visible
    let v = visibleNotifications.slice()
    const vi = v.indexOf(w)
    if (vi !== -1) {
      v.splice(vi, 1)
      visibleNotifications = v
    }

    // Remove from queue
    let q = notificationQueue.slice()
    const qi = q.indexOf(w)
    if (qi !== -1) {
      q.splice(qi, 1)
      notificationQueue = q
    }

    // Destroy wrapper if non-persistent
    if (w && w.destroy && !w.isPersistent) {
      w.destroy()
    }
  }

  // Android 16-style notification grouping functions
  function getGroupKey(wrapper) {
    // Priority 1: Use desktopEntry if available
    if (wrapper.desktopEntry && wrapper.desktopEntry !== "") {
      return wrapper.desktopEntry.toLowerCase()
    }

    // Priority 2: Use appName as fallback
    return wrapper.appName.toLowerCase()
  }

  function getGroupedNotifications() {
    const groups = {}

    for (const notif of notifications) {
      const groupKey = getGroupKey(notif)
      if (!groups[groupKey]) {
        groups[groupKey] = {
          "key": groupKey,
          "appName": notif.appName,
          "notifications": [],
          "latestNotification": null,
          "count": 0,
          "hasInlineReply": false
        }
      }

      groups[groupKey].notifications.unshift(notif)
      groups[groupKey].latestNotification = groups[groupKey].notifications[0]
      groups[groupKey].count = groups[groupKey].notifications.length

      if (notif.notification.hasInlineReply) {
        groups[groupKey].hasInlineReply = true
      }
    }

    return Object.values(groups).sort((a, b) => {
                                        const aUrgency = a.latestNotification.urgency
                                        || NotificationUrgency.Low
                                        const bUrgency = b.latestNotification.urgency
                                        || NotificationUrgency.Low
                                        if (aUrgency !== bUrgency) {
                                          return bUrgency - aUrgency
                                        }
                                        return b.latestNotification.time.getTime(
                                          ) - a.latestNotification.time.getTime(
                                          )
                                      })
  }

  function getGroupedPopups() {
    const groups = {}

    for (const notif of popups) {
      const groupKey = getGroupKey(notif)
      if (!groups[groupKey]) {
        groups[groupKey] = {
          "key": groupKey,
          "appName": notif.appName,
          "notifications": [],
          "latestNotification": null,
          "count": 0,
          "hasInlineReply": false
        }
      }

      groups[groupKey].notifications.unshift(notif)
      groups[groupKey].latestNotification = groups[groupKey].notifications[0]
      groups[groupKey].count = groups[groupKey].notifications.length

      if (notif.notification.hasInlineReply) {
        groups[groupKey].hasInlineReply = true
      }
    }

    return Object.values(groups).sort((a, b) => {
                                        return b.latestNotification.time.getTime(
                                          ) - a.latestNotification.time.getTime(
                                          )
                                      })
  }

  function toggleGroupExpansion(groupKey) {
    let newExpandedGroups = {}
    for (const key in expandedGroups) {
      newExpandedGroups[key] = expandedGroups[key]
    }
    newExpandedGroups[groupKey] = !newExpandedGroups[groupKey]
    expandedGroups = newExpandedGroups
  }

  function dismissGroup(groupKey) {
    const group = groupedNotifications.find(g => g.key === groupKey)
    if (group) {
      for (const notif of group.notifications) {
        if (notif && notif.notification) {
          notif.notification.dismiss()
        }
      }
    } else {
      for (const notif of allWrappers) {
        if (notif && notif.notification && getGroupKey(notif) === groupKey) {
          notif.notification.dismiss()
        }
      }
    }
  }

  function clearGroupExpansionState(groupKey) {
    let newExpandedGroups = {}
    for (const key in expandedGroups) {
      if (key !== groupKey && expandedGroups[key]) {
        newExpandedGroups[key] = true
      }
    }
    expandedGroups = newExpandedGroups
  }

  function cleanupExpansionStates() {
    const currentGroupKeys = new Set(groupedNotifications.map(g => g.key))
    const currentMessageIds = new Set()
    for (const group of groupedNotifications) {
      for (const notif of group.notifications) {
        currentMessageIds.add(notif.notification.id)
      }
    }
    let newExpandedGroups = {}
    for (const key in expandedGroups) {
      if (currentGroupKeys.has(key) && expandedGroups[key]) {
        newExpandedGroups[key] = true
      }
    }
    expandedGroups = newExpandedGroups
    let newExpandedMessages = {}
    for (const messageId in expandedMessages) {
      if (currentMessageIds.has(messageId) && expandedMessages[messageId]) {
        newExpandedMessages[messageId] = true
      }
    }
    expandedMessages = newExpandedMessages
  }

  function toggleMessageExpansion(messageId) {
    let newExpandedMessages = {}
    for (const key in expandedMessages) {
      newExpandedMessages[key] = expandedMessages[key]
    }
    newExpandedMessages[messageId] = !newExpandedMessages[messageId]
    expandedMessages = newExpandedMessages
  }

  Connections {
    target: SessionData
    function onDoNotDisturbChanged() {
      if (SessionData.doNotDisturb) {
        // Hide all current popups when DND is enabled
        for (const notif of visibleNotifications) {
          notif.popup = false
        }
        visibleNotifications = []
        notificationQueue = []
      } else {
        // Re-enable popup processing when DND is disabled
        processQueue()
      }
    }
  }
}