import QtQuick
import Quickshell
import Quickshell.Io
import qs.Commons

Item {
  id: root

  // Properties that match the facade interface
  property ListModel workspaces: ListModel {}
  property var windows: []
  property int focusedWindowIndex: -1

  // Signals that match the facade interface
  signal workspaceChanged
  signal activeWindowChanged
  signal windowListChanged

  // Initialization
  function initialize() {
    niriEventStream.running = true
    updateWorkspaces()
    updateWindows()
    Logger.log("NiriService", "Initialized successfully")
  }

  // Update workspaces
  function updateWorkspaces() {
    niriWorkspaceProcess.running = true
  }

  // Update windows
  function updateWindows() {
    niriWindowsProcess.running = true
  }

  // Niri workspace process
  Process {
    id: niriWorkspaceProcess
    running: false
    command: ["niri", "msg", "--json", "workspaces"]

    stdout: SplitParser {
      onRead: function (line) {
        try {
          const workspacesData = JSON.parse(line)
          const workspacesList = []

          for (const ws of workspacesData) {
            workspacesList.push({
                                  "id": ws.id,
                                  "idx": ws.idx,
                                  "name": ws.name || "",
                                  "output": ws.output || "",
                                  "isFocused": ws.is_focused === true,
                                  "isActive": ws.is_active === true,
                                  "isUrgent": ws.is_urgent === true,
                                  "isOccupied": ws.active_window_id ? true : false
                                })
          }

          // Sort workspaces by output, then by index
          workspacesList.sort((a, b) => {
                                if (a.output !== b.output) {
                                  return a.output.localeCompare(b.output)
                                }
                                return a.idx - b.idx
                              })

          // Update the workspaces ListModel
          workspaces.clear()
          for (var i = 0; i < workspacesList.length; i++) {
            workspaces.append(workspacesList[i])
          }

          workspaceChanged()
        } catch (e) {
          Logger.error("NiriService", "Failed to parse workspaces:", e, line)
        }
      }
    }
  }

  // Niri windows process (for initial load)
  Process {
    id: niriWindowsProcess
    running: false
    command: ["niri", "msg", "--json", "windows"]

    stdout: SplitParser {
      onRead: function (line) {
        try {
          const windowsData = JSON.parse(line)
          const windowsList = []

          for (const win of windowsData) {
            windowsList.push({
                               "id": win.id,
                               "title": win.title || "",
                               "appId": win.app_id || "",
                               "workspaceId": win.workspace_id || null,
                               "isFocused": win.is_focused === true
                             })
          }

          windowsList.sort((a, b) => a.id - b.id)
          windows = windowsList
          windowListChanged()

          // Update focused window index
          focusedWindowIndex = -1
          for (var i = 0; i < windowsList.length; i++) {
            if (windowsList[i].isFocused) {
              focusedWindowIndex = i
              break
            }
          }

          activeWindowChanged()
        } catch (e) {
          Logger.error("NiriService", "Failed to parse windows:", e, line)
        }
      }
    }
  }

  // Niri event stream process
  Process {
    id: niriEventStream
    running: false
    command: ["niri", "msg", "--json", "event-stream"]

    stdout: SplitParser {
      onRead: data => {
                try {
                  const event = JSON.parse(data.trim())

                  if (event.WorkspacesChanged) {
                    updateWorkspaces()
                  } else if (event.WindowOpenedOrChanged) {
                    handleWindowOpenedOrChanged(event.WindowOpenedOrChanged)
                  } else if (event.WindowClosed) {
                    handleWindowClosed(event.WindowClosed)
                  } else if (event.WindowsChanged) {
                    handleWindowsChanged(event.WindowsChanged)
                  } else if (event.WorkspaceActivated) {
                    updateWorkspaces()
                  } else if (event.WindowFocusChanged) {
                    handleWindowFocusChanged(event.WindowFocusChanged)
                  }
                  // Removed OverviewOpenedOrClosed handling
                } catch (e) {
                  Logger.error("NiriService", "Error parsing event stream:", e, data)
                }
              }
    }
  }

  // Event handlers
  function handleWindowOpenedOrChanged(eventData) {
    try {
      const windowData = eventData.window
      const existingIndex = windows.findIndex(w => w.id === windowData.id)

      const newWindow = {
        "id": windowData.id,
        "title": windowData.title || "",
        "appId": windowData.app_id || "",
        "workspaceId": windowData.workspace_id || null,
        "isFocused": windowData.is_focused === true
      }

      if (existingIndex >= 0) {
        // Update existing window
        windows[existingIndex] = newWindow
      } else {
        // Add new window
        windows.push(newWindow)
        windows.sort((a, b) => a.id - b.id)
      }

      // Update focused window index if this window is focused
      if (newWindow.isFocused) {
        const oldFocusedIndex = focusedWindowIndex
        focusedWindowIndex = windows.findIndex(w => w.id === windowData.id)

        // Only emit activeWindowChanged if the focused window actually changed
        if (oldFocusedIndex !== focusedWindowIndex) {
          activeWindowChanged()
        }
      }

      windowListChanged()
    } catch (e) {
      Logger.error("NiriService", "Error handling WindowOpenedOrChanged:", e)
    }
  }

  function handleWindowClosed(eventData) {
    try {
      const windowId = eventData.id
      const windowIndex = windows.findIndex(w => w.id === windowId)

      if (windowIndex >= 0) {
        // If this was the focused window, clear focus
        if (windowIndex === focusedWindowIndex) {
          focusedWindowIndex = -1
          activeWindowChanged()
        } else if (focusedWindowIndex > windowIndex) {
          // Adjust focused window index if needed
          focusedWindowIndex--
        }

        // Remove the window
        windows.splice(windowIndex, 1)
        windowListChanged()
      }
    } catch (e) {
      Logger.error("NiriService", "Error handling WindowClosed:", e)
    }
  }

  function handleWindowsChanged(eventData) {
    try {
      const windowsData = eventData.windows
      const windowsList = []

      for (const win of windowsData) {
        windowsList.push({
                           "id": win.id,
                           "title": win.title || "",
                           "appId": win.app_id || "",
                           "workspaceId": win.workspace_id || null,
                           "isFocused": win.is_focused === true
                         })
      }

      windowsList.sort((a, b) => a.id - b.id)
      windows = windowsList
      windowListChanged()

      // Update focused window index
      focusedWindowIndex = -1
      for (var i = 0; i < windowsList.length; i++) {
        if (windowsList[i].isFocused) {
          focusedWindowIndex = i
          break
        }
      }

      activeWindowChanged()
    } catch (e) {
      Logger.error("NiriService", "Error handling WindowsChanged:", e)
    }
  }

  function handleWindowFocusChanged(eventData) {
    try {
      const focusedId = eventData.id

      if (focusedId) {
        const newIndex = windows.findIndex(w => w.id === focusedId)
        focusedWindowIndex = newIndex >= 0 ? newIndex : -1
      } else {
        focusedWindowIndex = -1
      }

      activeWindowChanged()
    } catch (e) {
      Logger.error("NiriService", "Error handling WindowFocusChanged:", e)
    }
  }

  // Public functions
  function switchToWorkspace(workspaceId) {
    try {
      Quickshell.execDetached(["niri", "msg", "action", "focus-workspace", workspaceId.toString()])
    } catch (e) {
      Logger.error("NiriService", "Failed to switch workspace:", e)
    }
  }

  function logout() {
    try {
      Quickshell.execDetached(["niri", "msg", "action", "quit", "--skip-confirmation"])
    } catch (e) {
      Logger.error("NiriService", "Failed to logout:", e)
    }
  }
}