import { useState, useEffect } from 'react';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Card, CardContent } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import {
  Plus,
  Search,
  Trash2,
  Pencil,
  Key,
  Cloud,
  CheckCircle2,
  XCircle,
  RefreshCw,
  Loader2,
} from 'lucide-react';
import { cloudApi } from '@/services/api';
import { CloudBrandIcon, getProviderColor } from '@/components/icons/CloudBrandIcon';

const providerLabels: Record<string, string> = {
  aws: 'AWS',
  aliyun: '阿里云',
  tencent: '腾讯云',
  huawei: '华为云',
  azure: 'Azure',
  gcp: 'GCP',
};

export function CloudAccountManager() {
  const [accounts, setAccounts] = useState<any[]>([]);
  const [loading, setLoading] = useState(true);
  const [searchQuery, setSearchQuery] = useState('');
  const [selectedProvider, setSelectedProvider] = useState<string>('all');

  // 创建/编辑账号表单状态
  const [formOpen, setFormOpen] = useState(false);
  const [submitting, setSubmitting] = useState(false);
  const [editingAccount, setEditingAccount] = useState<any>(null);
  const [formData, setFormData] = useState({
    name: '',
    provider: 'aliyun',
    access_key: '',
    secret_key: '',
    monthly_cost: '',
    status: 'active',
  });

  const resetForm = () => {
    setEditingAccount(null);
    setFormData({
      name: '',
      provider: 'aliyun',
      access_key: '',
      secret_key: '',
      monthly_cost: '',
      status: 'active',
    });
  };

  const handleOpenCreate = () => {
    resetForm();
    setFormOpen(true);
  };

  const handleOpenEdit = ( account: any) => {
    setEditingAccount(account);
    setFormData({
      name: account.name || '',
      provider: account.provider || 'aliyun',
      access_key: '',
      secret_key: '',
      monthly_cost: String(account.monthly_cost ?? 0),
      status: account.status || 'active',
    });
    setFormOpen(true);
  };

  const handleSubmit = async () => {
    if (!formData.name.trim() || !formData.provider.trim()) return;
    try {
      setSubmitting(true);
      const payload: Record<string, any> = {
        name: formData.name.trim(),
        provider: formData.provider,
        access_key: formData.access_key.trim(),
        secret_key: formData.secret_key.trim(),
        monthly_cost: Number(formData.monthly_cost) || 0,
        status: formData.status,
      };
      if (editingAccount) {
        await cloudApi.updateAccount(editingAccount.id, payload);
      } else {
        await cloudApi.createAccount(payload);
      }
      setFormOpen(false);
      loadData();
    } catch (e) {
      console.error(editingAccount ? '更新云账号失败:' : '创建云账号失败:', e);
    } finally {
      setSubmitting(false);
    }
  };

  const loadData = async () => {
    try {
      setLoading(true);
      const res: Record<string, any> = await cloudApi.getAccounts();
      setAccounts(res?.list || []);
    } catch (e) {
      console.error('加载云账号列表失败:', e);
      setAccounts([]);
    } finally {
      setLoading(false);
    }
  };

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

  const handleDelete = async (id: string) => {
    try {
      await cloudApi.deleteAccount(id);
      loadData();
    } catch (e) {
      console.error('删除云账号失败:', e);
    }
  };

  const filteredAccounts = accounts.filter(account => {
    const accessKey = account.access_key || account.accessKey || '';
    const matchesSearch = (account.name || '').toLowerCase().includes(searchQuery.toLowerCase()) ||
                         accessKey.toLowerCase().includes(searchQuery.toLowerCase());
    const matchesProvider = selectedProvider === 'all' || account.provider === selectedProvider;
    return matchesSearch && matchesProvider;
  });

  const stats = {
    total: accounts.length,
    active: accounts.filter(a => a.status === 'active').length,
    inactive: accounts.filter(a => a.status === 'inactive').length,
    error: accounts.filter(a => a.status === 'error').length,
  };

  return (
    <div className="space-y-6">
      {/* Header */}
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-slate-100">云账号管理</h1>
          <p className="text-slate-400 mt-1">管理多云平台的访问凭证和账号信息</p>
        </div>
        <div className="flex items-center gap-2">
          <Button variant="outline" onClick={loadData} className="border-slate-700 text-slate-300">
            <RefreshCw className={`h-4 w-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
            刷新
          </Button>
          <Button className="bg-blue-600 hover:bg-blue-700" onClick={handleOpenCreate}>
            <Plus className="h-4 w-4 mr-2" />
            添加账号
          </Button>
        </div>
      </div>

      {/* Stats */}
      <div className="grid grid-cols-4 gap-4">
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-slate-400 text-sm">账号总数</p>
                <p className="text-2xl font-bold text-slate-100 mt-1">{stats.total}</p>
              </div>
              <div className="w-10 h-10 rounded-lg bg-blue-500/20 flex items-center justify-center">
                <Cloud className="h-5 w-5 text-blue-400" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-slate-400 text-sm">正常</p>
                <p className="text-2xl font-bold text-green-400 mt-1">{stats.active}</p>
              </div>
              <div className="w-10 h-10 rounded-lg bg-green-500/20 flex items-center justify-center">
                <CheckCircle2 className="h-5 w-5 text-green-400" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-slate-400 text-sm">已停用</p>
                <p className="text-2xl font-bold text-slate-400 mt-1">{stats.inactive}</p>
              </div>
              <div className="w-10 h-10 rounded-lg bg-slate-500/20 flex items-center justify-center">
                <XCircle className="h-5 w-5 text-slate-400" />
              </div>
            </div>
          </CardContent>
        </Card>
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-slate-400 text-sm">异常</p>
                <p className="text-2xl font-bold text-red-400 mt-1">{stats.error}</p>
              </div>
              <div className="w-10 h-10 rounded-lg bg-red-500/20 flex items-center justify-center">
                <Key className="h-5 w-5 text-red-400" />
              </div>
            </div>
          </CardContent>
        </Card>
      </div>

      {/* Filters */}
      <div className="flex items-center gap-4">
        <div className="relative flex-1 max-w-md">
          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-slate-400" />
          <Input
            placeholder="搜索账号名称或AccessKey..."
            value={searchQuery}
            onChange={(e) => setSearchQuery(e.target.value)}
            className="pl-10 bg-slate-800 border-slate-700 text-slate-100"
          />
        </div>
        <select
          value={selectedProvider}
          onChange={(e) => setSelectedProvider(e.target.value)}
          className="px-3 py-2 bg-slate-800 border border-slate-700 rounded-md text-slate-100 text-sm"
        >
          <option value="all">全部平台</option>
          <option value="aws">AWS</option>
          <option value="aliyun">阿里云</option>
          <option value="tencent">腾讯云</option>
          <option value="huawei">华为云</option>
          <option value="azure">Azure</option>
        </select>
      </div>

      {/* Account List */}
      {loading ? (
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-12 text-center text-slate-500">
            <RefreshCw className="h-6 w-6 animate-spin mx-auto mb-3" />
            加载中...
          </CardContent>
        </Card>
      ) : filteredAccounts.length === 0 ? (
        <Card className="bg-slate-800 border-slate-700">
          <CardContent className="p-12 text-center text-slate-500">暂无云账号数据</CardContent>
        </Card>
      ) : (
        <div className="grid grid-cols-2 gap-4">
          {filteredAccounts.map((account) => {
            const accessKey = account.access_key || account.accessKey || '';
            const serverCount = account.server_count ?? account.serverCount ?? 0;
            const lastSync = account.last_sync || account.lastSync || account.created_at || '-';
            const monthlyCost = account.monthly_cost ?? account.monthlyCost ?? 0;
            return (
              <Card key={account.id} className="bg-slate-800 border-slate-700">
                <CardContent className="p-4">
                  <div className="flex items-start justify-between">
                    <div className="flex items-start gap-3">
                      <div className="w-10 h-10 rounded-lg bg-slate-800 flex items-center justify-center" style={{ borderBottom: `2px solid ${getProviderColor(account.provider)}` }}>
                        <CloudBrandIcon provider={account.provider} className="h-6 w-6" />
                      </div>
                      <div>
                        <h3 className="font-medium text-slate-100">{account.name}</h3>
                        <p className="text-sm text-slate-400 mt-0.5">{providerLabels[account.provider] || account.provider}</p>
                        <div className="flex items-center gap-3 mt-2">
                          {accessKey && (
                            <Badge variant="secondary" className="bg-slate-700 text-slate-300">
                              <Key className="h-3 w-3 mr-1" />
                              {accessKey.slice(0, 8)}...
                            </Badge>
                          )}
                          {account.status === 'active' && (
                            <Badge className="bg-green-500/20 text-green-400 border-0">
                              <CheckCircle2 className="h-3 w-3 mr-1" />
                              正常
                            </Badge>
                          )}
                          {account.status === 'inactive' && (
                            <Badge className="bg-slate-500/20 text-slate-400 border-0">
                              <XCircle className="h-3 w-3 mr-1" />
                              已停用
                            </Badge>
                          )}
                          {account.status === 'error' && (
                            <Badge className="bg-red-500/20 text-red-400 border-0">
                              <Key className="h-3 w-3 mr-1" />
                              异常
                            </Badge>
                          )}
                        </div>
                      </div>
                    </div>
                    <div className="flex items-center gap-1">
                      <Button
                        variant="ghost"
                        size="icon"
                        className="h-8 w-8 text-slate-400 hover:text-blue-400"
                        onClick={() => handleOpenEdit(account)}
                      >
                        <Pencil className="h-4 w-4" />
                      </Button>
                      <Button
                        variant="ghost"
                        size="icon"
                        className="h-8 w-8 text-slate-400 hover:text-red-400"
                        onClick={() => handleDelete(account.id)}
                      >
                        <Trash2 className="h-4 w-4" />
                      </Button>
                    </div>
                  </div>
                  <div className="grid grid-cols-3 gap-4 mt-4 pt-4 border-t border-slate-700">
                    <div>
                      <p className="text-xs text-slate-400">月费用</p>
                      <p className="text-lg font-medium text-emerald-400">¥{Number(monthlyCost).toLocaleString()}</p>
                    </div>
                    <div>
                      <p className="text-xs text-slate-400">服务器数</p>
                      <p className="text-lg font-medium text-slate-100">{serverCount}</p>
                    </div>
                    <div>
                      <p className="text-xs text-slate-400">最后同步</p>
                      <p className="text-sm text-slate-300">
                        {lastSync !== '-' ? new Date(lastSync).toLocaleString() : '-'}
                      </p>
                    </div>
                  </div>
                </CardContent>
              </Card>
            );
          })}
        </div>
      )}

      {/* 创建账号 Dialog */}
      <Dialog open={formOpen} onOpenChange={setFormOpen}>
        <DialogContent className="bg-slate-800 border-slate-700 text-slate-100 max-w-lg">
          <DialogHeader>
            <DialogTitle className="text-slate-100 flex items-center gap-2">
              <Cloud className="h-5 w-5 text-blue-400" />
              {editingAccount ? '编辑云账号' : '添加云账号'}
            </DialogTitle>
            <DialogDescription className="text-slate-400">
              {editingAccount ? '修改账号信息和访问凭证，留空则保持原凭证不变' : '录入多云平台的访问凭证，用于资源同步与成本统计'}
            </DialogDescription>
          </DialogHeader>

          <div className="space-y-4 py-2">
            <div className="grid grid-cols-2 gap-4">
              <div className="space-y-1.5">
                <Label className="text-slate-300">
                  账号名称 <span className="text-red-400">*</span>
                </Label>
                <Input
                  placeholder="阿里云生产账号"
                  value={formData.name}
                  onChange={(e) => setFormData({ ...formData, name: e.target.value })}
                  className="bg-slate-900 border-slate-700 text-slate-100 placeholder:text-slate-500"
                />
              </div>
              <div className="space-y-1.5">
                <Label className="text-slate-300">
                  云平台 <span className="text-red-400">*</span>
                </Label>
                <select
                  value={formData.provider}
                  onChange={(e) => setFormData({ ...formData, provider: e.target.value })}
                  className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-md text-slate-100 text-sm"
                >
                  <option value="aliyun">阿里云</option>
                  <option value="tencent">腾讯云</option>
                  <option value="aws">AWS</option>
                  <option value="huawei">华为云</option>
                  <option value="azure">Azure</option>
                </select>
              </div>
            </div>

            <div className="space-y-1.5">
              <Label className="text-slate-300">
                AccessKey
                {editingAccount && <span className="text-xs text-slate-500 ml-2">留空保持不变</span>}
              </Label>
              <Input
                placeholder="LTAI..."
                value={formData.access_key}
                onChange={(e) => setFormData({ ...formData, access_key: e.target.value })}
                className="bg-slate-900 border-slate-700 text-slate-100 placeholder:text-slate-500 font-mono text-sm"
              />
            </div>

            <div className="space-y-1.5">
              <Label className="text-slate-300">
                SecretKey
                {editingAccount && <span className="text-xs text-slate-500 ml-2">留空保持不变</span>}
              </Label>
              <Input
                type="password"
                placeholder="••••••••"
                value={formData.secret_key}
                onChange={(e) => setFormData({ ...formData, secret_key: e.target.value })}
                className="bg-slate-900 border-slate-700 text-slate-100 placeholder:text-slate-500 font-mono text-sm"
              />
            </div>

            <div className="grid grid-cols-2 gap-4">
              <div className="space-y-1.5">
                <Label className="text-slate-300">月费用 (元)</Label>
                <Input
                  type="number"
                  min="0"
                  placeholder="0"
                  value={formData.monthly_cost}
                  onChange={(e) => setFormData({ ...formData, monthly_cost: e.target.value })}
                  className="bg-slate-900 border-slate-700 text-slate-100 placeholder:text-slate-500"
                />
              </div>
              <div className="space-y-1.5">
                <Label className="text-slate-300">状态</Label>
                <select
                  value={formData.status}
                  onChange={(e) => setFormData({ ...formData, status: e.target.value })}
                  className="w-full px-3 py-2 bg-slate-900 border border-slate-700 rounded-md text-slate-100 text-sm"
                >
                  <option value="active">正常</option>
                  <option value="inactive">已停用</option>
                  <option value="error">异常</option>
                </select>
              </div>
            </div>
          </div>

          <DialogFooter>
            <Button variant="outline" onClick={() => setFormOpen(false)} className="border-slate-700 text-slate-300 hover:bg-slate-700">
              取消
            </Button>
            <Button
              className="bg-blue-600 hover:bg-blue-700"
              disabled={!formData.name.trim() || submitting}
              onClick={handleSubmit}
            >
              {submitting ? <Loader2 className="h-4 w-4 mr-2 animate-spin" /> : editingAccount ? <Pencil className="h-4 w-4 mr-2" /> : <Plus className="h-4 w-4 mr-2" />}
              {editingAccount ? '保存修改' : '创建账号'}
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </div>
  );
}