import { useRef, useState } from 'react'
import Taro from '@tarojs/taro'
import { Button, Image, Text, View } from '@tarojs/components'
import { deityCatalog, getDeity, isTiangongDemo, tiangongMock } from '../services/tiangong'
import { DeityId } from '../utils/tiangongMock'
import { useTiangongSnapshot } from '../hooks/useTiangongSnapshot'
import { resolveAssetUrl } from '../services/request'
import { openWechatCustomerService } from '../services/customerService'
import './DeityBinding.scss'

export function BindingGate({ onBind, lock = true }: { onBind: () => void; lock?: boolean }) {
  return <View className='binding-gate' catchMove>
    <View className='binding-gate-content'>
      {lock && <View className='binding-lock'><View /></View>}
      <Text>须绑定神仙</Text><Text>开启你的守护之旅</Text>
      <View className='binding-gate-actions'>
        <Button className='binding-primary' onClick={onBind}>绑定神仙</Button>
        <Button className='binding-outline' onClick={openWechatCustomerService}>联系我们</Button>
      </View>
    </View>
  </View>
}

export function DeityCardDialog({ deityId, mode = 'view', onClose }: { deityId: DeityId; mode?: 'bind' | 'view'; onClose: () => void }) {
  const snapshot = useTiangongSnapshot()
  const deity = getDeity(deityId)!
  const state = snapshot.deities[deityId]
  const [menu, setMenu] = useState(false)
  const [confirmUnbind, setConfirmUnbind] = useState(false)
  const [error, setError] = useState('')
  const [failedImage, setFailedImage] = useState('')
  const working = useRef(false)
  const demo = isTiangongDemo()
  const art = demo ? deity.icon : resolveAssetUrl(state.iconUrl)
  const canShowArt = !!art && failedImage !== art
  const perform = (action: () => void) => {
    if (!demo || working.current) return
    working.current = true
    try { action(); onClose() } catch (cause) { setError(cause instanceof Error ? cause.message : '模拟操作失败') }
    finally { working.current = false }
  }
  return <View className='binding-dialog-mask' catchMove>
    <View className='binding-dialog-stack'>
      <View className='binding-gold-card' role='dialog' aria-label={demo && mode === 'bind' ? '确认绑定神仙' : state.unlocked ? '已绑定神仙详情' : '神仙信息'}>
        <View className='binding-card-hook' /><View className='binding-card-corner top' /><View className='binding-card-corner bottom' />
        <View className='binding-card-title-row'><Text className='binding-card-spark'>✦</Text><Text className='binding-card-name'>{deity.name}</Text><Text className='binding-card-spark'>✦</Text>
          {demo && mode === 'view' && <Button className='binding-more' aria-label='神仙更多操作' onClick={() => setMenu(!menu)}>•••</Button>}
        </View>
        {demo && menu && <Button className='binding-unbind-menu' onClick={() => { setMenu(false); setConfirmUnbind(true) }}>解绑神仙</Button>}
        <View className='binding-art-frame'>{canShowArt ? <Image className='binding-card-art' src={art} mode='aspectFit' onError={() => setFailedImage(art)} /> : <Text className='binding-card-image-note'>{art ? '图片加载失败' : '图片暂未配置'}</Text>}</View>
        <Text className='binding-card-subtitle'>守护神仙 · {deity.name}</Text>
        {demo ? <><Text className='binding-card-code'>唯一 ID：DEMO-{deityId.toUpperCase()}-001</Text><Text className='binding-card-note'>Mock 原型演示 · 不连接真实 NFC</Text></> : state.holdingId ? <Text className='binding-card-code'>持有记录：{state.holdingId}</Text> : null}
        {demo && mode === 'bind' ? <>
          <Text className='binding-card-warning'>每位神仙只能绑定一个微信号哦</Text>
          <Button className='binding-primary binding-card-confirm' onClick={() => perform(() => {
            tiangongMock.invite(deityId)
            Taro.showToast({ title: '模拟绑定成功', icon: 'none' })
          })}>确认绑定</Button>
        </> : state.unlocked ? <View className='binding-guarded'><View className='binding-shield'>✓</View><Text>已守护 <Text className='binding-days'>{state.days}</Text> 天</Text></View> : <Text className='binding-card-note'>请通过 NFC 绑定神仙。</Text>}
        {error && <Text className='binding-error'>{error}</Text>}
      </View>
      <Button className='binding-card-close' aria-label='关闭神仙卡片' onClick={onClose}>×</Button>
    </View>
    {demo && confirmUnbind && <View className='binding-confirm-mask'>
      <View className='binding-confirm-panel' role='dialog' aria-label='解绑神仙确认'>
        <Text className='binding-confirm-title'><Text className='binding-alert'>ⓘ</Text> 确定要解绑吗？</Text>
        <View className='binding-confirm-copy'>
          <Text>• 解绑后「我的」里面不再展示该神仙</Text>
          <Text>• 该神仙今年还剩 <Text className='binding-quota'>{state.remainingUnbinds} 次</Text> 解绑机会</Text>
          <Text>• 用神仙碰触手机 NFC 可再次绑定</Text>
        </View>
        {state.remainingUnbinds === 0 && <Text className='binding-error'>该神仙今年的解绑次数已用尽，暂不可解绑。</Text>}
        <Text className='binding-demo-note'>本次仅模拟；取消不会扣减次数。</Text>
        <View className='binding-confirm-actions'>
          <Button className={`binding-primary ${state.remainingUnbinds === 0 ? 'binding-disabled' : ''}`} disabled={state.remainingUnbinds === 0} onClick={() => perform(() => {
            tiangongMock.unbind(deityId)
            Taro.showToast({ title: '模拟解绑成功', icon: 'none' })
          })}>确定解绑</Button>
          <Button className='binding-outline' onClick={() => { setConfirmUnbind(false); setError('') }}>取消</Button>
        </View>
        {error && <Text className='binding-error'>{error}</Text>}
      </View>
    </View>}
  </View>
}

export function DeityBindingFlow({ initialDeity, onClose }: { initialDeity?: DeityId; onClose: () => void }) {
  const [selected, setSelected] = useState<DeityId | null>(initialDeity || null)
  const snapshot = useTiangongSnapshot()
  if (!isTiangongDemo()) return <View className='binding-dialog-mask' catchMove><View className='binding-picker' role='dialog' aria-label='绑定神仙说明'><Text className='binding-confirm-title'>碰一碰，绑定神仙</Text><Text className='binding-picker-note'>请通过 NFC 绑定神仙，本次不在页面中模拟真实设备绑定。</Text><Button className='binding-outline binding-picker-cancel' onClick={onClose}>关闭</Button></View></View>
  if (selected) return <DeityCardDialog deityId={selected} mode='bind' onClose={onClose} />
  const available = deityCatalog.filter(item => !snapshot.deities[item.id].unlocked)
  return <View className='binding-dialog-mask' catchMove><View className='binding-picker' role='dialog' aria-label='模拟 NFC 识别'>
    <Text className='binding-confirm-title'>碰一碰，绑定神仙</Text>
    <Text className='binding-picker-note'>Mock 演示：选择要模拟识别的神仙。不会开启 NFC、连接设备或绑定真实微信号。</Text>
    <View className='binding-picker-grid'>{available.map(deity => <Button key={deity.id} className='binding-picker-item' aria-label={`模拟识别${deity.name}`} onClick={() => setSelected(deity.id)}><Image className='binding-picker-art' src={deity.icon} mode='aspectFit' /><Text>{deity.name}</Text></Button>)}</View>
    {!available.length && <Text className='binding-picker-note'>当前示例中的神仙均已绑定。</Text>}
    <Button className='binding-outline binding-picker-cancel' onClick={onClose}>取消</Button>
  </View></View>
}