import { app, BrowserWindow, clipboard, dialog, ipcMain, shell } from 'electron'
import * as path from 'node:path'
import * as fssync from 'node:fs'
import {
  getDrivesWin,
  listDirectory,
  computeFolderSize,
  findLargeFiles,
  getProcessesWin,
  getServicesWin,
  getInstalledPrograms,
  getSystemSnapshot,
  getNetworkInterfaces,
  getEnvSnapshot,
  getStartupFolders,
  getTempAudit,
  getScheduledTasksSummary,
  openPathInExplorer,
  killProcess,
  getWindowsFeaturesSnippet,
} from './audit'
import { startPythonBackend, stopPythonBackend } from './pythonBackend'

const isDev = !!process.env.VITE_DEV_SERVER_URL

function notesPath() {
  return path.join(app.getPath('userData'), 'auditor-notes.json')
}

function loadNotes(): Record<string, string> {
  try {
    const raw = fssync.readFileSync(notesPath(), 'utf8')
    return JSON.parse(raw) as Record<string, string>
  } catch {
    return {}
  }
}

function saveNotes(n: Record<string, string>) {
  fssync.mkdirSync(path.dirname(notesPath()), { recursive: true })
  fssync.writeFileSync(notesPath(), JSON.stringify(n, null, 2), 'utf8')
}

function createWindow() {
  const win = new BrowserWindow({
    width: 1280,
    height: 800,
    minWidth: 960,
    minHeight: 640,
    backgroundColor: '#0d0f12',
    titleBarStyle: process.platform === 'darwin' ? 'hiddenInset' : 'default',
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: false,
    },
  })

  if (isDev) {
    win.loadURL(process.env.VITE_DEV_SERVER_URL!)
  } else {
    win.loadFile(path.join(__dirname, '../dist/index.html'))
  }
}

app.whenReady().then(async () => {
  try {
    await startPythonBackend()
  } catch (e) {
    dialog.showErrorBox(
      'Python backend required',
      `${String(e)}\n\nInstall: cd backend && pip install -r requirements.txt`
    )
    app.quit()
    return
  }

  ipcMain.handle('audit:drives', () => getDrivesWin())
  ipcMain.handle('audit:listDir', (_e, dirPath: string, opts?: { maxEntries?: number }) =>
    listDirectory(dirPath, opts ?? {})
  )
  ipcMain.handle('audit:folderSize', (_e, dirPath: string) => computeFolderSize(dirPath))
  ipcMain.handle('audit:largeFiles', (_e, rootPath: string, minBytes: number, maxResults: number) =>
    findLargeFiles(rootPath, minBytes, maxResults)
  )
  ipcMain.handle('audit:processes', () => getProcessesWin())
  ipcMain.handle('audit:services', () => getServicesWin())
  ipcMain.handle('audit:installed', () => getInstalledPrograms())
  ipcMain.handle('audit:system', () => getSystemSnapshot())
  ipcMain.handle('audit:network', () => getNetworkInterfaces())
  ipcMain.handle('audit:env', (_e, keys?: string[]) => getEnvSnapshot(keys))
  ipcMain.handle('audit:startup', () => getStartupFolders())
  ipcMain.handle('audit:temp', () => getTempAudit())
  ipcMain.handle('audit:tasks', () => getScheduledTasksSummary())
  ipcMain.handle('audit:features', () => getWindowsFeaturesSnippet())
  ipcMain.handle('audit:openExplorer', (_e, p: string) => openPathInExplorer(p))
  ipcMain.handle('audit:killProcess', (_e, pid: number) => killProcess(pid))
  ipcMain.handle('audit:openExternal', (_e, url: string) => shell.openExternal(url))
  ipcMain.handle('clipboard:writeText', (_e, text: string) => {
    clipboard.writeText(text)
  })

  ipcMain.handle('notes:getAll', () => loadNotes())
  ipcMain.handle('notes:set', (_e, key: string, value: string) => {
    const all = loadNotes()
    if (value.trim() === '') delete all[key]
    else all[key] = value
    saveNotes(all)
    return all
  })
  ipcMain.handle('notes:delete', (_e, key: string) => {
    const all = loadNotes()
    delete all[key]
    saveNotes(all)
    return all
  })

  createWindow()
  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') app.quit()
})

app.on('before-quit', () => {
  stopPythonBackend()
})