import QtQuick
import Quickshell
import Quickshell.Io
import "Model.js" as Model

Item {
  id: root

  property var settings: ({})

  readonly property string homeDir: Quickshell.env("HOME")
  readonly property string serviceUnitPath: homeDir + "/.config/systemd/user/hypr-rdp.service"
  readonly property string rdpConfigDir: homeDir + "/.config/hypr-rdp"
  readonly property string rdpConfigPath: rdpConfigDir + "/config.toml"
  readonly property string toggleDir: homeDir + "/.local/state/omarchy/toggles/hypr"
  readonly property string isolationTogglePath: toggleDir + "/hypr-rdp-isolation.lua"
  readonly property string outputName: "hypr-rdp"

  readonly property int pollIntervalSec: intSetting("pollIntervalSec", 5, 2, 60)
  readonly property int isolatedWorkspace: intSetting("isolatedWorkspace", 11, 1, 99)

  property bool installed: false
  property bool serviceUnitExists: false
  property bool running: false
  // Optimistic desired state so the switch reacts instantly; -1 means
  // "just follow reality", 0/1 mean "still catching up to a click".
  property int _desired: -1
  readonly property bool active: _desired === -1 ? running : (_desired === 1)

  property bool isolationFileExists: false
  property int _isolationDesired: -1
  readonly property bool isolated: _isolationDesired === -1 ? isolationFileExists : (_isolationDesired === 1)

  readonly property bool busy: startStopProc.running || installUnitProc.running
    || isolationRemoveProc.running || reloadProc.running

  property string statusText: "Checking…"
  property string lastError: ""
  property string actionStatus: ""

  property string username: ""
  property string password: ""
  property string bindAddress: ""
  property string rawConfigText: ""
  property bool configLoaded: false

  property var windowsOnIsolated: []
  property int previousWorkspace: -1
  property bool peeking: false

  function setting(name, fallback) {
    var v = settings ? settings[name] : undefined
    return (v === undefined || v === null) ? fallback : v
  }

  function intSetting(name, fallback, min, max) {
    var n = parseInt(String(setting(name, fallback)), 10)
    if (!isFinite(n)) n = fallback
    if (n < min) n = min
    if (n > max) n = max
    return n
  }

  function clearActionStatus() { root.actionStatus = "" }

  Timer {
    id: actionStatusTimer
    interval: 3000
    repeat: false
    onTriggered: root.clearActionStatus()
  }

  function flashStatus(message) {
    root.actionStatus = message
    actionStatusTimer.restart()
  }

  function refresh() {
    if (!whichProc.running) whichProc.running = true
    if (!statusProc.running) statusProc.running = true
    if (root.running && !clientsProc.running) clientsProc.running = true
  }

  Timer {
    interval: root.pollIntervalSec * 1000
    running: true
    repeat: true
    onTriggered: root.refresh()
  }

  Component.onCompleted: {
    unitDirProc.running = true
    isolationDirProc.running = true
    configDirProc.running = true
    root.refresh()
  }

  // ---------------------------------------------------------- install

  Process {
    id: whichProc
    command: ["which", "hypr-rdp"]
    onExited: function(code) { root.installed = (code === 0) }
  }

  function installHyprRdp() {
    Quickshell.execDetached(["omarchy", "launch", "terminal", "bash", "-lc",
      "omarchy pkg aur add hypr-rdp-git; echo; read -p 'Press Enter to close...' _"])
  }

  // ---------------------------------------------------------- service unit

  property FileView serviceUnitFile: FileView {
    path: root.serviceUnitPath
    watchChanges: true
    printErrors: false
    onLoaded: root.serviceUnitExists = true
    onLoadFailed: root.serviceUnitExists = false
    onFileChanged: reload()
  }

  readonly property string serviceUnitContent:
    "[Unit]\n" +
    "Description=Native RDP server for Hyprland\n" +
    "Documentation=https://github.com/MuNeNICK/hypr-rdp\n" +
    "PartOf=graphical-session.target\n" +
    "Requires=graphical-session.target\n" +
    "After=graphical-session.target\n" +
    "ConditionEnvironment=WAYLAND_DISPLAY\n" +
    "\n" +
    "[Service]\n" +
    "Type=simple\n" +
    "ExecStart=/usr/bin/hypr-rdp\n" +
    "Slice=session.slice\n" +
    "Restart=on-failure\n" +
    "\n" +
    "[Install]\n" +
    "WantedBy=graphical-session.target\n"

  Process { id: unitDirProc; command: ["mkdir", "-p", root.homeDir + "/.config/systemd/user"] }

  Process {
    id: installUnitProc
    command: []
    onExited: function(code) {
      if (code !== 0) root.flashStatus("Failed to enable hypr-rdp.service")
      root.refresh()
    }
  }

  function ensureServiceUnit(thenStart) {
    if (root.serviceUnitExists) { thenStart(); return }
    root.serviceUnitFile.setText(root.serviceUnitContent)
    root.serviceUnitExists = true
    installUnitProc.command = ["bash", "-lc",
      "systemctl --user daemon-reload && systemctl --user enable hypr-rdp.service"]
    installUnitProc.running = true
    thenStart()
  }

  // ---------------------------------------------------------- status/start/stop

  Process {
    id: statusProc
    command: ["systemctl", "--user", "is-active", "hypr-rdp.service"]
    onExited: function(code) {
      root.running = (code === 0)
      if (root._desired !== -1 && root.running === (root._desired === 1)) root._desired = -1
      root.statusText = !root.installed ? "Not installed" : (root.running ? "Running" : "Stopped")
      if (root.running && !clientsProc.running) clientsProc.running = true
      if (!root.running) root.windowsOnIsolated = []
    }
  }

  Process {
    id: startStopProc
    command: []
    onExited: function(code) {
      if (code !== 0) {
        var wasStarting = root._desired === 1
        root._desired = -1
        root.flashStatus(wasStarting ? "hypr-rdp failed to start" : "hypr-rdp failed to stop")
      }
      root.refresh()
    }
  }

  function toggleService() {
    if (!root.installed || startStopProc.running) return
    if (root.active) {
      root._desired = 0
      startStopProc.command = ["systemctl", "--user", "stop", "hypr-rdp.service"]
      startStopProc.running = true
    } else {
      root._desired = 1
      ensureServiceUnit(function() {
        startStopProc.command = ["systemctl", "--user", "start", "hypr-rdp.service"]
        startStopProc.running = true
      })
    }
  }

  // ---------------------------------------------------------- isolation toggle

  property FileView isolationFile: FileView {
    path: root.isolationTogglePath
    watchChanges: true
    printErrors: false
    onLoaded: {
      root.isolationFileExists = true
      if (root._isolationDesired === 1) root._isolationDesired = -1
    }
    onLoadFailed: {
      root.isolationFileExists = false
      if (root._isolationDesired === 0) root._isolationDesired = -1
    }
    onFileChanged: reload()
  }

  Process { id: isolationDirProc; command: ["mkdir", "-p", root.toggleDir] }

  Process {
    id: isolationRemoveProc
    command: ["rm", "-f", root.isolationTogglePath]
    onExited: function(code) { root.applyReload() }
  }

  Process {
    id: reloadProc
    command: ["bash", "-lc", "hyprctl reload >/dev/null 2>&1; hyprctl configerrors"]
    stdout: StdioCollector { id: reloadOut; waitForEnd: true }
    onExited: function(code) {
      var text = String(reloadOut.text || "").trim()
      root.lastError = (text !== "" && text.toLowerCase() !== "ok") ? ("Hyprland config error: " + text) : ""
    }
  }

  function applyReload() { reloadProc.running = true }

  function toggleIsolation() {
    if (isolationRemoveProc.running || reloadProc.running) return
    if (root.isolated) {
      root._isolationDesired = 0
      root.isolationFileExists = false
      isolationRemoveProc.running = true
    } else {
      root._isolationDesired = 1
      root.isolationFile.setText(Model.isolationLuaContent(root.isolatedWorkspace, root.outputName))
      // FileView does not re-emit onLoaded for its own write.
      root.isolationFileExists = true
      root.applyReload()
    }
  }

  // ---------------------------------------------------------- credentials

  property FileView configFile: FileView {
    path: root.rdpConfigPath
    watchChanges: true
    printErrors: false
    onLoaded: {
      root.rawConfigText = text()
      var parsed = Model.parseConfig(root.rawConfigText)
      root.username = parsed.username
      root.password = parsed.password
      root.bindAddress = parsed.bind
      root.configLoaded = true
    }
    onLoadFailed: root.configLoaded = false
    onFileChanged: reload()
  }

  Process { id: configDirProc; command: ["mkdir", "-p", root.rdpConfigDir] }

  function saveCredentials(newUsername, newPassword, newBind) {
    var patch = { username: newUsername, password: newPassword, bind: newBind }
    var text = Model.serializeConfig(root.rawConfigText, patch)
    root.configFile.setText(text)
    root.rawConfigText = text
    root.username = newUsername
    root.password = newPassword
    root.bindAddress = newBind
    root.flashStatus(root.running ? "Saved — restart hypr-rdp to apply" : "Saved")
  }

  // ---------------------------------------------------------- isolated workspace peek

  Process {
    id: activeWorkspaceProc
    command: []
    stdout: StdioCollector { id: activeWsOut; waitForEnd: true }
    onExited: function(code) {
      var id = Model.parseActiveWorkspaceId(activeWsOut.text)
      if (id >= 0) root.previousWorkspace = id
      dispatchProc.command = ["hyprctl", "dispatch", "workspace", String(root.isolatedWorkspace)]
      dispatchProc.running = true
      root.peeking = true
    }
  }

  Process { id: dispatchProc; command: [] }

  function peekIsolatedWorkspace() {
    if (root.peeking || activeWorkspaceProc.running) return
    activeWorkspaceProc.command = ["hyprctl", "-j", "activeworkspace"]
    activeWorkspaceProc.running = true
  }

  function returnFromPeek() {
    if (!root.peeking || root.previousWorkspace < 0) return
    dispatchProc.command = ["hyprctl", "dispatch", "workspace", String(root.previousWorkspace)]
    dispatchProc.running = true
    root.peeking = false
  }

  // ---------------------------------------------------------- windows on the isolated workspace

  Process {
    id: clientsProc
    command: ["hyprctl", "-j", "clients"]
    stdout: StdioCollector {
      id: clientsOut
      waitForEnd: true
      onStreamFinished: root.windowsOnIsolated = Model.parseClients(text, root.isolatedWorkspace)
    }
  }
}