pragma Singleton

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

// Service to check if various programs are available on the system
Singleton {
  id: root

  // Program availability properties
  property bool matugenAvailable: false
  property bool pywalfoxAvailable: false
  property bool alacrittyAvailable: false
  property bool kittyAvailable: false
  property bool ghosttyAvailable: false
  property bool footAvailable: false
  property bool weztermAvailable: false
  property bool fuzzelAvailable: false
  property bool vicinaeAvailable: false
  property bool walkerAvailable: false
  property bool gpuScreenRecorderAvailable: false
  property bool wlsunsetAvailable: false
  property bool app2unitAvailable: false
  property bool codeAvailable: false

  // Discord client auto-detection
  property var availableDiscordClients: []

  // Signal emitted when all checks are complete
  signal checksCompleted

  // Function to detect Discord client by checking config directories
  function detectDiscordClient() {
    // Build shell script to check each client
    var scriptParts = ["available_clients=\"\";"]

    for (var i = 0; i < MatugenTemplates.discordClients.length; i++) {
      var client = MatugenTemplates.discordClients[i]
      var clientName = client.name

      // Check if this client requires themes folder to exist
      if (client.requiresThemesFolder) {
        scriptParts.push("if [ -d \"$HOME/.config/" + clientName + "/themes\" ]; then available_clients=\"$available_clients " + clientName + "\"; fi;")
      } else {
        scriptParts.push("if [ -d \"$HOME/.config/" + clientName + "\" ]; then available_clients=\"$available_clients " + clientName + "\"; fi;")
      }
    }

    scriptParts.push("echo \"$available_clients\"")

    // Use a Process to check directory existence for all clients
    discordDetector.command = ["sh", "-c", scriptParts.join(" ")]
    discordDetector.running = true
  }

  // Process to detect Discord client directories
  Process {
    id: discordDetector
    running: false

    onExited: function (exitCode) {
      availableDiscordClients = []

      if (exitCode === 0) {
        var detectedClients = stdout.text.trim().split(/\s+/).filter(function (client) {
          return client.length > 0
        })

        if (detectedClients.length > 0) {
          // Build list of available clients
          for (var i = 0; i < detectedClients.length; i++) {
            var clientName = detectedClients[i]
            for (var j = 0; j < MatugenTemplates.discordClients.length; j++) {
              var client = MatugenTemplates.discordClients[j]
              if (client.name === clientName) {
                availableDiscordClients.push(client)
                break
              }
            }
          }

          Logger.i("ProgramChecker", "Detected Discord clients:", detectedClients.join(", "))
        }
      }

      if (availableDiscordClients.length === 0) {
        Logger.d("ProgramChecker", "No Discord clients detected")
      }
    }

    stdout: StdioCollector {}
    stderr: StdioCollector {}
  }

  // Programs to check - maps property names to commands
  readonly property var programsToCheck: ({
                                            "matugenAvailable": ["which", "matugen"],
                                            "pywalfoxAvailable": ["which", "pywalfox"],
                                            "alacrittyAvailable": ["which", "alacritty"],
                                            "kittyAvailable": ["which", "kitty"],
                                            "ghosttyAvailable": ["which", "ghostty"],
                                            "footAvailable": ["which", "foot"],
                                            "weztermAvailable": ["which", "wezterm"],
                                            "fuzzelAvailable": ["which", "fuzzel"],
                                            "vicinaeAvailable": ["sh", "-c", "command -v vicinae >/dev/null 2>&1 || (IFS=:; find $PATH -maxdepth 1 -iname 'vicinae*.appimage' -type f -executable 2>/dev/null | grep -q .)"],
                                            "walkerAvailable": ["which", "walker"],
                                            "app2unitAvailable": ["which", "app2unit"],
                                            "gpuScreenRecorderAvailable": ["sh", "-c", "command -v gpu-screen-recorder >/dev/null 2>&1 || (command -v flatpak >/dev/null 2>&1 && flatpak list --app | grep -q 'com.dec05eba.gpu_screen_recorder')"],
                                            "wlsunsetAvailable": ["which", "wlsunset"],
                                            "codeAvailable": ["which", "code"]
                                          })

  // Internal tracking
  property int completedChecks: 0
  property int totalChecks: Object.keys(programsToCheck).length

  // Single reusable Process object
  Process {
    id: checker
    running: false

    property string currentProperty: ""

    onExited: function (exitCode) {
      // Set the availability property
      root[currentProperty] = (exitCode === 0)

      // Stop the process to free resources
      running = false

      // Track completion
      root.completedChecks++

      // Check next program or emit completion signal
      if (root.completedChecks >= root.totalChecks) {
        // Run Discord client detection after all checks are complete
        root.detectDiscordClient()
        root.checksCompleted()
      } else {
        root.checkNextProgram()
      }
    }

    stdout: StdioCollector {}
    stderr: StdioCollector {}
  }

  // Queue of programs to check
  property var checkQueue: []
  property int currentCheckIndex: 0

  // Function to check the next program in the queue
  function checkNextProgram() {
    if (currentCheckIndex >= checkQueue.length)
      return

    var propertyName = checkQueue[currentCheckIndex]
    var command = programsToCheck[propertyName]

    checker.currentProperty = propertyName
    checker.command = command
    checker.running = true

    currentCheckIndex++
  }

  // Function to run all program checks
  function checkAllPrograms() {
    // Reset state
    completedChecks = 0
    currentCheckIndex = 0
    checkQueue = Object.keys(programsToCheck)

    // Start first check
    if (checkQueue.length > 0) {
      checkNextProgram()
    }
  }

  // Function to check a specific program
  function checkProgram(programProperty) {
    if (!programsToCheck.hasOwnProperty(programProperty)) {
      Logger.w("ProgramChecker", "Unknown program property:", programProperty)
      return
    }

    checker.currentProperty = programProperty
    checker.command = programsToCheck[programProperty]
    checker.running = true
  }

  // Manual function to test Discord detection (for debugging)
  function testDiscordDetection() {
    Logger.d("ProgramChecker", "Testing Discord detection...")
    Logger.d("ProgramChecker", "HOME:", Quickshell.env("HOME"))

    // Test each client directory
    for (var i = 0; i < MatugenTemplates.discordClients.length; i++) {
      var client = MatugenTemplates.discordClients[i]
      var configDir = client.configPath.replace("~", Quickshell.env("HOME"))
      Logger.d("ProgramChecker", "Checking:", configDir)
    }

    detectDiscordClient()
  }

  // Initialize checks when service is created
  Component.onCompleted: {
    checkAllPrograms()
  }
}