import React, { useState, useEffect } from 'react'
import { View, Text, Button, Input, actionSheet } from '@tarojs/components'
import Taro, { useRouter } from '@tarojs/taro'
import { usePullDownRefresh } from '@tarojs/taro'
import { listProjectMember, addProjectMember, removeProjectMember } from '@/api/developer/developer'
import type { ProjectMember } from '@/types/developer'
import './members.scss'

// 角色配置
const ROLE_CONFIG: Record<string, { label: string; color: string; desc: string }> = {
  owner: { label: '所有者', color: '#722ed1', desc: '拥有所有权限' },
  admin: { label: '管理员', color: '#1890ff', desc: '管理项目设置和成员' },
  developer: { label: '开发者', color: '#52c41a', desc: '开发和管理应用' },
  viewer: { label: '查看者', color: '#999', desc: '仅可查看' },
}

const MembersPage: React.FC = () => {
  const router = useRouter()
  const projectId = Number(router.params.id)

  const [loading, setLoading] = useState(false)
  const [refreshing, setRefreshing] = useState(false)
  const [list, setList] = useState<ProjectMember[]>([])
  const [showInvite, setShowInvite] = useState(false)
  const [inviteForm, setInviteForm] = useState({
    username: '',
    role: 'developer' as ProjectMember['role'],
  })
  const [inviting, setInviting] = useState(false)

  // 加载数据
  const loadData = async (isRefresh = false) => {
    if (loading) return
    setLoading(true)
    if (isRefresh) setRefreshing(true)

    try {
      const data = await listProjectMember(projectId)
      setList(data || [])
    } catch (err) {
      console.error('加载失败', err)
      Taro.showToast({ title: '加载失败', icon: 'none' })
    } finally {
      setLoading(false)
      setRefreshing(false)
    }
  }

  useEffect(() => {
    loadData()
  }, [projectId])

  // 下拉刷新
  usePullDownRefresh(() => {
    loadData(true)
  })

  // 邀请成员
  const handleInvite = async () => {
    if (!inviteForm.username.trim()) {
      Taro.showToast({ title: '请输入用户名', icon: 'none' })
      return
    }

    setInviting(true)
    try {
      await addProjectMember(projectId, {
        username: inviteForm.username,
        role: inviteForm.role,
      } as Partial<ProjectMember>)
      Taro.showToast({ title: '邀请成功', icon: 'success' })
      setShowInvite(false)
      setInviteForm({ username: '', role: 'developer' })
      loadData()
    } catch (err) {
      console.error('邀请失败', err)
      Taro.showToast({ title: '邀请失败', icon: 'none' })
    } finally {
      setInviting(false)
    }
  }

  // 移除成员
  const handleRemove = (member: ProjectMember) => {
    if (member.role === 'owner') {
      Taro.showToast({ title: '无法移除项目所有者', icon: 'none' })
      return
    }

    actionSheet({
      alertText: `确定将 "${member.username}" 从项目中移除吗？`,
      actions: [
        { name: '移除', color: '#ff4d4f', type: 'warn' as const },
      ],
      confirmText: '取消',
    }).then(res => {
      if (res.confirm) {
        doRemove(member.id!)
      }
    }).catch(() => {})
  }

  const doRemove = async (memberId: number) => {
    try {
      await removeProjectMember(projectId, memberId)
      Taro.showToast({ title: '已移除', icon: 'success' })
      loadData()
    } catch (err) {
      console.error('移除失败', err)
      Taro.showToast({ title: '移除失败', icon: 'none' })
    }
  }

  // 修改角色
  const handleChangeRole = (member: ProjectMember) => {
    if (member.role === 'owner') {
      Taro.showToast({ title: '无法修改所有者角色', icon: 'none' })
      return
    }

    const roles = ['admin', 'developer', 'viewer']
    const options = roles.map(role => ({
      name: ROLE_CONFIG[role].label,
    }))

    actionSheet({
      title: `修改 "${member.username}" 的角色`,
      actions: options,
      confirmText: '取消',
    }).then(res => {
      if (res.confirm === false && res.errMsg?.includes('cancel')) return
      const role = roles[res.confirm as number]
      if (role) {
        updateRole(member.id!, role as ProjectMember['role'])
      }
    }).catch(() => {})
  }

  const updateRole = async (memberId: number, role: ProjectMember['role']) => {
    try {
      await addProjectMember(projectId, { id: memberId, role } as Partial<ProjectMember>)
      Taro.showToast({ title: '已更新角色', icon: 'success' })
      loadData()
    } catch (err) {
      console.error('更新失败', err)
      Taro.showToast({ title: '更新失败', icon: 'none' })
    }
  }

  // 格式化日期
  const formatDate = (dateStr?: string) => {
    if (!dateStr) return '-'
    const date = new Date(dateStr)
    return `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`
  }

  return (
    <View className="members-page">
      {/* 头部 */}
      <View className="members-page__header">
        <Text className="members-page__title">👥 项目成员</Text>
        <Button
          className="members-page__invite-btn"
          size="mini"
          onClick={() => setShowInvite(true)}
        >
          + 邀请
        </Button>
      </View>

      {/* 统计 */}
      <View className="members-page__stats">
        <View className="members-page__stat">
          <Text className="members-page__stat-num">{list.length}</Text>
          <Text className="members-page__stat-label">总成员</Text>
        </View>
        <View className="members-page__stat">
          <Text className="members-page__stat-num">
            {list.filter(m => m.role === 'admin' || m.role === 'owner').length}
          </Text>
          <Text className="members-page__stat-label">管理员</Text>
        </View>
        <View className="members-page__stat">
          <Text className="members-page__stat-num">
            {list.filter(m => m.role === 'developer').length}
          </Text>
          <Text className="members-page__stat-label">开发者</Text>
        </View>
        <View className="members-page__stat">
          <Text className="members-page__stat-num">
            {list.filter(m => m.role === 'viewer').length}
          </Text>
          <Text className="members-page__stat-label">查看者</Text>
        </View>
      </View>

      {/* 成员列表 */}
      <View className="members-page__list">
        {list.length === 0 && !loading ? (
          <View className="members-page__empty">
            <Text>暂无成员</Text>
            <Text className="members-page__empty-hint">点击「邀请」添加项目成员</Text>
          </View>
        ) : (
          list.map((member) => (
            <View key={member.id} className="member-card">
              <View className="member-card__avatar">
                {member.avatar ? (
                  <View
                    className="member-card__avatar-img"
                    style={{ backgroundImage: `url(${member.avatar})` }}
                  />
                ) : (
                  <Text className="member-card__avatar-text">
                    {(member.username || '?').charAt(0).toUpperCase()}
                  </Text>
                )}
              </View>

              <View className="member-card__info">
                <View className="member-card__name-row">
                  <Text className="member-card__name">{member.username}</Text>
                  <View
                    className="member-card__role"
                    style={{ color: ROLE_CONFIG[member.role || 'viewer']?.color }}
                  >
                    {ROLE_CONFIG[member.role || 'viewer']?.label}
                  </View>
                </View>
                <Text className="member-card__desc">
                  {ROLE_CONFIG[member.role || 'viewer']?.desc}
                </Text>
                <Text className="member-card__time">
                  加入于 {formatDate(member.joinedAt)}
                </Text>
              </View>

              {member.role !== 'owner' && (
                <View className="member-card__actions">
                  <Text
                    className="member-card__action"
                    onClick={() => handleChangeRole(member)}
                  >
                    修改角色
                  </Text>
                  <Text
                    className="member-card__action member-card__action--danger"
                    onClick={() => handleRemove(member)}
                  >
                    移除
                  </Text>
                </View>
              )}
            </View>
          ))
        )}

        {loading && list.length === 0 && (
          <View className="members-page__loading">
            <Text>加载中...</Text>
          </View>
        )}
      </View>

      {/* 邀请弹窗 */}
      {showInvite && (
        <View className="members-page__modal">
          <View className="members-page__modal-mask" onClick={() => setShowInvite(false)} />
          <View className="members-page__modal-content">
            <Text className="members-page__modal-title">邀请项目成员</Text>

            <View className="members-page__form">
              <View className="members-page__form-item">
                <Text className="members-page__form-label">用户名 *</Text>
                <Input
                  className="members-page__form-input"
                  placeholder="请输入要邀请的用户名"
                  value={inviteForm.username}
                  onInput={(e) => setInviteForm(prev => ({ ...prev, username: e.detail.value }))}
                />
              </View>

              <View className="members-page__form-item">
                <Text className="members-page__form-label">角色</Text>
                <View className="members-page__form-radio">
                  {(['admin', 'developer', 'viewer'] as const).map((role) => (
                    <View
                      key={role}
                      className={`members-page__form-radio-item ${inviteForm.role === role ? 'active' : ''}`}
                      onClick={() => setInviteForm(prev => ({ ...prev, role }))}
                    >
                      {ROLE_CONFIG[role].label}
                    </View>
                  ))}
                </View>
                <Text className="members-page__form-hint">
                  {ROLE_CONFIG[inviteForm.role]?.desc}
                </Text>
              </View>
            </View>

            <View className="members-page__modal-actions">
              <Button
                className="members-page__modal-btn members-page__modal-btn--cancel"
                onClick={() => setShowInvite(false)}
              >
                取消
              </Button>
              <Button
                className="members-page__modal-btn members-page__modal-btn--confirm"
                loading={inviting}
                onClick={handleInvite}
              >
                邀请
              </Button>
            </View>
          </View>
        </View>
      )}
    </View>
  )
}

export default MembersPage