import { useState, useEffect } from 'react'
import {
  DESKTOP_VERSION,
  DESKTOP_WINDOWS_INSTALLER_FILENAME,
  DESKTOP_WINDOWS_INSTALLER_URL,
} from '../release'

export type ClientOSType = 'android' | 'ios' | 'windows' | 'macos' | 'linux'

export interface ClientOSInfo {
  os: ClientOSType
  osName: string
  isMobile: boolean
  downloadUrl: string
  downloadFilename: string
  badgeText: string
  buttonLabelKo: string
  buttonLabelEn: string
  subtextKo: string
  subtextEn: string
}

export const OS_CONFIGS: Record<ClientOSType, ClientOSInfo> = {
  android: {
    os: 'android',
    osName: 'Android',
    isMobile: true,
    downloadUrl: '#download',
    downloadFilename: '',
    badgeText: 'ANDROID RELEASE PENDING',
    buttonLabelKo: 'Android 공식 배포 준비 중',
    buttonLabelEn: 'Android release unavailable',
    subtextKo: '서명된 배포 증거가 확인될 때까지 다운로드를 제공하지 않습니다.',
    subtextEn: 'Download stays unavailable until signed release evidence is verified.',
  },
  ios: {
    os: 'ios',
    osName: 'iOS',
    isMobile: true,
    downloadUrl: '#download',
    downloadFilename: '',
    badgeText: 'iOS DISTRIBUTION UNAVAILABLE',
    buttonLabelKo: 'iOS 배포 미지원',
    buttonLabelEn: 'iOS distribution unavailable',
    subtextKo: '현재 검증된 App Store 또는 TestFlight 배포가 없습니다.',
    subtextEn: 'No verified App Store or TestFlight distribution is available.',
  },
  windows: {
    os: 'windows',
    osName: 'Windows',
    isMobile: false,
    downloadUrl: DESKTOP_WINDOWS_INSTALLER_URL,
    downloadFilename: DESKTOP_WINDOWS_INSTALLER_FILENAME,
    badgeText: `DESKTOP ${DESKTOP_VERSION} OFFICIAL RELEASE`,
    buttonLabelKo: `Windows용 다운로드 (x64) - v${DESKTOP_VERSION}`,
    buttonLabelEn: `Download for Windows (x64) - v${DESKTOP_VERSION}`,
    subtextKo: `서명된 공식 릴리스 v${DESKTOP_VERSION}이며, 설치 후 자동 업데이트 피드로 갱신됩니다.`,
    subtextEn: `Signed official release v${DESKTOP_VERSION}, updated through the auto-update feed after install.`,
  },
  macos: {
    os: 'macos',
    osName: 'macOS',
    isMobile: false,
    downloadUrl: '#download',
    downloadFilename: '',
    badgeText: 'MACOS APPLE SILICON PREPARATION',
    buttonLabelKo: 'macOS 릴리스 준비 중',
    buttonLabelEn: 'macOS release in preparation',
    subtextKo: 'Apple Silicon용 빌드는 서명과 설치 검증을 마친 뒤 제공합니다.',
    subtextEn: 'The Apple Silicon build will be published after signing and installation verification.',
  },
  linux: {
    os: 'linux',
    osName: 'Linux',
    isMobile: false,
    downloadUrl: '#download',
    downloadFilename: '',
    badgeText: 'LINUX PACKAGE UNAVAILABLE',
    buttonLabelKo: 'Linux 배포 미지원',
    buttonLabelEn: 'Linux package unavailable',
    subtextKo: '현재 검증된 AppImage 또는 DEB 패키지가 없습니다.',
    subtextEn: 'No verified AppImage or DEB package is available.',
  },
}

export function useClientOS(): ClientOSInfo {
  const [osInfo, setOsInfo] = useState<ClientOSInfo>(OS_CONFIGS.windows)

  useEffect(() => {
    if (typeof window === 'undefined' || !navigator) return
    const ua = navigator.userAgent || ''
    const platform = (navigator as any).userAgentData?.platform || navigator.platform || ''

    if (/android/i.test(ua)) {
      setOsInfo(OS_CONFIGS.android)
    } else if (/iphone|ipad|ipod/i.test(ua) || (platform === 'MacIntel' && navigator.maxTouchPoints > 1)) {
      setOsInfo(OS_CONFIGS.ios)
    } else if (/macintosh|mac os x/i.test(ua) || /mac/i.test(platform)) {
      setOsInfo(OS_CONFIGS.macos)
    } else if (/linux/i.test(ua) || /linux/i.test(platform)) {
      setOsInfo(OS_CONFIGS.linux)
    } else if (/windows|win32|win64/i.test(ua) || /win/i.test(platform)) {
      setOsInfo(OS_CONFIGS.windows)
    } else {
      setOsInfo(OS_CONFIGS.windows)
    }
  }, [])

  return osInfo
}