import { getParticipantArtwork } from '@/utils/artwork'
import { formatConversationPreview } from '@/utils/chat-preview'
import PageTitle from '@/components/page-title'
import { getPageStyle } from '@/utils/page-style'
import { setActiveTabRoute } from '@/utils/tab-bar'
import { View, Text, ScrollView, Image } from '@tarojs/components'
import { useState } from 'react'
import Taro, { useDidShow } from '@tarojs/taro'
import { getToken } from '@/services/auth'
import { getConversations, ChatConversation } from '../../services/chat'
import { useSystemBanner } from '@/components/system-banner/use-system-banner'
import { usePageShare } from '@/utils/page-share'
import './index.scss'

export default function Chat() {
  usePageShare()
  const systemBanner = useSystemBanner()
  const [conversations, setConversations] = useState<ChatConversation[]>([])
  const [loading, setLoading] = useState(true)
  const [isGuest, setIsGuest] = useState(false)

  useDidShow(() => {
    setActiveTabRoute('pages/chat/index')
    void loadConversations()
  })

  const loadConversations = async () => {
    if (!getToken()) {
      setConversations([])
      setIsGuest(true)
      setLoading(false)
      return
    }

    setIsGuest(false)
    setLoading(true)
    try {
      const data = await getConversations()
      setConversations(data)
    } catch (error: any) {
      console.error('[chat] load failed:', error)
      Taro.showToast({
        title: error?.message || '加载失败，请稍后重试',
        icon: 'none',
      })
    } finally {
      setLoading(false)
    }
  }

  const handleConversationClick = (conversation: ChatConversation) => {
    Taro.navigateTo({
      url:
        `/pages/chat/detail/index?id=${conversation.id}` +
        `&source=${conversation.source}` +
        `&name=${encodeURIComponent(conversation.name)}` +
        `&peerKind=${conversation.peerKind}` +
        `&roleKey=${encodeURIComponent(conversation.roleKey || '')}` +
        `&conversationTypeName=${encodeURIComponent(conversation.conversationTypeName || '')}` +
        `&peerId=${encodeURIComponent(conversation.peerId || '')}` +
        `&childId=${conversation.childId || ''}` +
        `&childName=${encodeURIComponent(conversation.childName || '')}` +
        `&parentUserId=${conversation.parentUserId || ''}` +
        `&deviceId=${encodeURIComponent(conversation.deviceId || '')}` +
        `&channelLabel=${encodeURIComponent(conversation.channelLabel || '')}` +
        `&canSend=${conversation.canSend ? '1' : '0'}`,
    })
  }

  const handleGuestLogin = () => {
    Taro.setStorageSync('postLoginRedirect', '/pages/chat/index')
    Taro.navigateTo({ url: '/pages/login/index' })
  }

  const handleGuestPreviewTap = (title: string, content: string) => {
    Taro.showModal({
      title,
      content,
      showCancel: false,
      confirmText: '我知道了',
    })
  }

  return (
    <View className='chat-page' style={getPageStyle(true)}>
      <View className='page-header'>
        <PageTitle title='玩伴' />
      </View>

      {isGuest ? (
        <View className='guest-chat-shell'>
          <View className='guest-card'>
            <Text className='guest-card-icon'>💬</Text>
            <Text className='guest-card-title'>亲子互动会话</Text>
            <Text className='guest-card-desc'>这里会汇总宝贝、家长和 AI 玩伴之间的消息。绑定设备后，真实会话会按宝贝和设备自动归档。</Text>
          </View>

          <View className='guest-demo-card'>
            <View className='guest-demo-header'>
              <Text className='guest-demo-title'>会话示例</Text>
              <View
                className='guest-demo-tag'
                onClick={() => handleGuestPreviewTap(
                  '会话预览',
                  '这里展示玩伴页的会话能力。绑定设备后，会显示宝贝、家长和 AI 玩伴的真实消息记录。'
                )}
              >
                <Text className='guest-demo-tag-text'>预览</Text>
              </View>
            </View>
            <View
              className='guest-demo-item'
              onClick={() => handleGuestPreviewTap(
                'AI 玩伴',
                '绑定设备后，可以在这里查看宝贝与 AI 玩伴的真实会话记录，包括聊天内容、时间和对应宝贝。'
              )}
            >
              <View className='guest-demo-avatar'>
                <Image className='conversation-avatar-art' src={getParticipantArtwork('ai')} mode='aspectFit' />
              </View>
              <View className='guest-demo-content'>
                <Text className='guest-demo-name'>AI 玩伴</Text>
                <Text className='guest-demo-message'>陪宝贝聊天、讲故事，也能留下可回看记录。</Text>
              </View>
              <View
                className='guest-demo-action'
                onClick={() => handleGuestPreviewTap(
                  'AI 玩伴',
                  '绑定设备后，可以在这里查看宝贝与 AI 玩伴的真实会话记录，包括聊天内容、时间和对应宝贝。'
                )}
              >
                <Text className='guest-demo-action-text'>查看</Text>
              </View>
            </View>
            <View
              className='guest-demo-item'
              onClick={() => handleGuestPreviewTap(
                '家长留言',
                '绑定设备后，家长可以查看消息记录，也可以给宝贝发送语音留言，设备端会收到对应提醒。'
              )}
            >
              <View className='guest-demo-avatar parent'>
                <Image className='conversation-avatar-art' src={getParticipantArtwork('parent')} mode='aspectFit' />
              </View>
              <View className='guest-demo-content'>
                <Text className='guest-demo-name'>家长留言</Text>
                <Text className='guest-demo-message'>家长可查看设备消息，并给宝贝发送语音留言。</Text>
              </View>
              <View
                className='guest-demo-action'
                onClick={() => handleGuestPreviewTap(
                  '家长留言',
                  '绑定设备后，家长可以查看消息记录，也可以给宝贝发送语音留言，设备端会收到对应提醒。'
                )}
              >
                <Text className='guest-demo-action-text'>查看</Text>
              </View>
            </View>
          </View>

          <View className='guest-guide-card'>
            <Text className='guest-guide-title'>开始使用</Text>
            <Text className='guest-guide-desc'>浏览功能不需要登录；当你需要绑定设备、查看真实会话记录时，再进入登录和绑定流程。</Text>
            <View className='guest-card-btn secondary' onClick={handleGuestLogin}>
              <Text className='guest-card-btn-text'>去登录 / 绑定设备</Text>
            </View>
          </View>
        </View>
      ) : loading ? (
        <View className='loading'>
          <Text>加载中...</Text>
        </View>
      ) : conversations.length === 0 ? (
        <View className='empty-card'>
          <Text className='empty-title'>当前宝贝暂无会话</Text>
        </View>
      ) : (
        <ScrollView className='conversation-list' scrollY enhanced showScrollbar={false}>
          {conversations.map((conversation) => (
            <View
              key={conversation.key}
              className='conversation-item'
              onClick={() => handleConversationClick(conversation)}
            >
              <View className='conversation-avatar'>
                <Image className='conversation-avatar-art' src={getParticipantArtwork(conversation.peerKind, conversation.roleKey)} mode='aspectFit' />
              </View>
              <View className='conversation-content'>
                <View className='conversation-header'>
                  <View className='conversation-name-wrap'>
                    <Text className='conversation-name'>{conversation.name}</Text>
                    <Text className={`conversation-tag ${conversation.peerKind}`}>{conversation.typeLabel}</Text>
                  </View>
                  <Text className='conversation-time'>{conversation.time}</Text>
                </View>
                <View className='conversation-footer'>
                  <View className='last-message'>
                    {formatConversationPreview(conversation.lastMessage)}
                  </View>
                </View>
                {conversation.childName && <Text className='conversation-meta'>{conversation.childName}</Text>}
              </View>
            </View>
          ))}
        </ScrollView>
      )}
      {systemBanner}
    </View>
  )
}