import { Tray, Menu, nativeImage, app } from 'electron'
import { join } from 'node:path'
import { showMainWindow } from './windows'
import { forceCheck } from './scheduler'
import { broadcastState, snoozeAll } from './state-actions'
import { getSettings, updateSettings } from './store'
import type { Language } from '@shared/types'

let tray: Tray | null = null

/**
 * Minimal tray-side localisation. The renderer's full i18n dict lives in
 * `src/renderer/src/i18n/dict.ts` and isn't reachable from the main process
 * tsconfig, so we keep the 5 strings the tray actually uses here.
 */
const TRAY_STRINGS: Record<Language, Record<string, string>> = {
  ru: {
    open: 'Открыть',
    pause: 'Пауза напоминаний',
    resume: 'Возобновить напоминания',
    snooze15: 'Отложить все на 15 мин',
    quit: 'Выход'
  },
  en: {
    open: 'Open',
    pause: 'Pause reminders',
    resume: 'Resume reminders',
    snooze15: 'Snooze all 15 min',
    quit: 'Quit'
  }
}

function trayLabel(key: string): string {
  // getSettings reads from cache; if the store hasn't loaded yet (very early
  // boot) it lazily reads from disk. Defaults to 'ru' if anything goes wrong.
  let lang: Language = 'ru'
  try {
    lang = getSettings().language ?? 'ru'
  } catch {
    /* keep default */
  }
  return TRAY_STRINGS[lang]?.[key] ?? TRAY_STRINGS.ru[key] ?? key
}

function resolveTrayIcon(): Electron.NativeImage {
  // Try resources/, fallback to a transparent 16x16 if missing during dev.
  const candidates = [
    join(process.resourcesPath, 'tray.png'),
    join(__dirname, '../../resources/tray.png'),
    join(app.getAppPath(), 'resources/tray.png')
  ]
  for (const p of candidates) {
    const img = nativeImage.createFromPath(p)
    if (!img.isEmpty()) return img
  }
  return nativeImage.createEmpty()
}

export function createTray(): Tray {
  if (tray) return tray
  const icon = resolveTrayIcon()
  tray = new Tray(icon)
  tray.setToolTip('Exercise Reminder')
  refreshMenu()
  tray.on('click', () => showMainWindow())
  tray.on('double-click', () => showMainWindow())
  return tray
}

export function refreshMenu(): void {
  if (!tray) return
  // Single source of truth — settings.globalEnabled. Раньше tray держал
  // отдельный scheduler-local `paused` flag, который не синхронизировался
  // с Dashboard'ом (там кнопка читает globalEnabled). Теперь оба пути
  // правят одно поле.
  const paused = !getSettings().globalEnabled
  const menu = Menu.buildFromTemplate([
    { label: trayLabel('open'), click: () => showMainWindow() },
    { type: 'separator' },
    {
      label: paused ? trayLabel('resume') : trayLabel('pause'),
      click: () => {
        updateSettings({ globalEnabled: paused }) // toggle
        broadcastState() // чтобы Dashboard перерисовал кнопку сразу
        refreshMenu()
        if (paused) forceCheck() // resuming — догнать пропущенные fires
      }
    },
    {
      label: trayLabel('snooze15'),
      click: () => snoozeAll(15)
    },
    { type: 'separator' },
    {
      label: trayLabel('quit'),
      click: () => {
        app.quit()
      }
    }
  ])
  tray.setContextMenu(menu)
}

export function destroyTray(): void {
  if (tray) {
    tray.destroy()
    tray = null
  }
}