import hasPackage from '@cityssm/has-package'
import type {
   InstalledWebBrowser
} from '@cityssm/web-browser-info'

let browsersLoaded = false
let chromeBrowsers: InstalledWebBrowser[] = []
let firefoxBrowsers: InstalledWebBrowser[] = []

async function loadUserBrowsers(): Promise<void> {
  if (!await hasPackage('@cityssm/web-browser-info')) {
    return
  }

  const { chromeWebBrowserTypes, getInstalledWebBrowsers } = await import('@cityssm/web-browser-info')

  if (!browsersLoaded) {
    /*
     * Load Chrome first
     */

    const fallbackChromeBrowsers = await getInstalledWebBrowsers(
      chromeWebBrowserTypes,
      110
    )

    chromeBrowsers = fallbackChromeBrowsers

    /*
     * Load Firefox
     */

    const fallbackFirefoxBrowsers = await getInstalledWebBrowsers('firefox')

    firefoxBrowsers = fallbackFirefoxBrowsers

    // eslint-disable-next-line require-atomic-updates
    browsersLoaded = true
  }
}

/**
 * Gets the path to the user's Chrome browser.
 * @returns The path to the user's Chrome browser, or undefined if not found.
 */
export async function getUserChromePath(): Promise<string | undefined> {
  await loadUserBrowsers()
  const chromePath = chromeBrowsers[0]?.command
  return chromePath
}

/**
 * Gets the path to the user's Firefox browser.
 * @returns The path to the user's Firefox browser, or undefined if not found.
 */
export async function getUserFirefoxPath(): Promise<string | undefined> {
  await loadUserBrowsers()
  const firefoxPath = firefoxBrowsers[0]?.command
  return firefoxPath
}