import { useEffect, useState, useCallback } from 'react';
import { Row, Col, Spin, Empty } from 'antd';
import {
  UserOutlined,
  TeamOutlined,
  CalendarOutlined,
  HeartOutlined,
  MedicineBoxOutlined,
  SafetyCertificateOutlined,
  MessageOutlined,
  BellOutlined,
  AlertOutlined,
  TrophyOutlined,
  ShoppingOutlined,
  FileTextOutlined,
  RightOutlined,
  PartitionOutlined,
  ClockCircleOutlined,
  CheckCircleOutlined,
  ThunderboltOutlined,
  SettingOutlined,
  ApartmentOutlined,
} from '@ant-design/icons';
import { useNavigate } from 'react-router-dom';
import { useThemeMode } from '../hooks/useThemeMode';
import { useDashboardRole, type DashboardRole } from '../hooks/useDashboardRole';
import { useMessageStore } from '../stores/message';
import { listAuditLogs, type AuditLogItem } from '../api/auditLogs';
import { listPendingTasks, type TaskInfo } from '../api/workflowTasks';
import { pointsApi, type PersonalStats } from '../api/health/points';
import { useStatsData } from './health/StatisticsDashboard/useStatsData';
import { useCountUp } from '../hooks/useCountUp';
import ActionDetailDrawer from './health/components/workbench/ActionDetailDrawer';
import TaskQueue from './health/components/workbench/TaskQueue';
import TaskDetail from './health/components/workbench/TaskDetail';
import DoctorWorkbench from './health/components/workbench/DoctorWorkbench';
import NurseWorkbench from './health/components/workbench/NurseWorkbench';
import OperatorWorkbench from './health/components/workbench/OperatorWorkbench';
import AdminDashboard from './health/components/workbench/AdminDashboard';
import type { ActionItem } from '../api/health/actionInbox';

// --- Shared utilities ---

function formatTimeAgo(dateStr: string): string {
  const diff = Date.now() - new Date(dateStr).getTime();
  const minutes = Math.floor(diff / 60000);
  if (minutes < 1) return '刚刚';
  if (minutes < 60) return `${minutes} 分钟前`;
  const hours = Math.floor(minutes / 60);
  if (hours < 24) return `${hours} 小时前`;
  const days = Math.floor(hours / 24);
  return `${days} 天前`;
}

const ACTION_LABELS: Record<string, string> = {
  create: '创建', created: '创建', update: '更新', updated: '更新', delete: '删除', deleted: '删除',
  login: '登录', 'user.create': '创建', 'user.update': '更新', 'user.delete': '删除',
  'patient.create': '创建', 'patient.update': '更新', 'appointment.create': '创建',
};
const RESOURCE_LABELS: Record<string, string> = {
  user: '用户', role: '角色', patient: '患者', doctor: '医护', appointment: '预约',
  follow_up_task: '随访', consultation_session: '咨询', message: '消息', plugin: '插件',
  process_instance: '流程实例', organization: '组织',
};
const RESOURCE_ICONS: Record<string, React.ReactNode> = {
  user: <UserOutlined />, role: <SafetyCertificateOutlined />,
  patient: <UserOutlined />, organization: <ApartmentOutlined />,
  process_instance: <FileTextOutlined />, message: <BellOutlined />,
};

function formatActionLabel(action: string): string {
  return ACTION_LABELS[action] || ACTION_LABELS[action.split('.').pop() || ''] || action;
}
function formatResourceLabel(resource: string): string {
  return RESOURCE_LABELS[resource] || RESOURCE_LABELS[resource.split('.').pop() || ''] || resource;
}

// --- Role configs ---

interface StatCardDef {
  key: string;
  title: string;
  getValue: (p: PersonalStats | null, s: ReturnType<typeof useStatsData>) => number;
  getDiff?: (p: PersonalStats | null) => number | undefined;
  icon: React.ReactNode;
  suffix?: string;
  path: string;
}

interface QuickActionDef {
  icon: React.ReactNode;
  label: string;
  path: string;
}

const ROLE_WELCOME: Record<DashboardRole, { title: string; subtitle: string }> = {
  doctor: { title: '今日工作台', subtitle: '患者概览与待办事项' },
  health_manager: { title: '任务工作台', subtitle: '待处理任务与患者管理' },
  nurse: { title: '随访监控台', subtitle: '今日随访与体征上报' },
  admin: { title: '管理中心', subtitle: '平台运营数据概览' },
  operator: { title: '运营中心', subtitle: '积分、内容与活动' },
};

const STAT_BAR_COLORS: string[] = [
  'linear-gradient(90deg, #2563EB, #60A5FA)',
  'linear-gradient(90deg, #7C3AED, #A78BFA)',
  'linear-gradient(90deg, #DC2626, #F87171)',
  'linear-gradient(90deg, #D97706, #FBBF24)',
];
const STAT_TEXT_COLORS: string[] = ['#2563EB', '#7C3AED', '#DC2626', '#D97706'];

const ROLE_STATS: Record<DashboardRole, StatCardDef[]> = {
  doctor: [
    { key: 'my-patients', title: '我的患者', getValue: (p) => p?.my_patients ?? 0, getDiff: (p) => { const c = p?.my_patients, y = p?.yesterday_my_patients; return c != null && y != null ? c - y : undefined; }, icon: <TeamOutlined />, path: '/health/patients' },
    { key: 'today-appointments', title: '今日预约', getValue: (p) => p?.today_appointments ?? 0, getDiff: (p) => { const c = p?.today_appointments, y = p?.yesterday_today_appointments; return c != null && y != null ? c - y : undefined; }, icon: <CalendarOutlined />, path: '/health/appointments' },
    { key: 'consultations', title: '本月咨询', getValue: (p) => p?.consultations_this_month ?? 0, getDiff: (p) => { const c = p?.consultations_this_month, y = p?.yesterday_consultations_this_month; return c != null && y != null ? c - y : undefined; }, icon: <MessageOutlined />, path: '/health/consultations' },
    { key: 'followup-rate', title: '随访完成率', getValue: (p) => p?.follow_up_rate ?? 0, icon: <HeartOutlined />, suffix: '%', path: '/health/follow-ups' },
  ],
  health_manager: [
    { key: 'today-followups', title: '今日随访', getValue: (p) => p?.today_follow_ups ?? 0, getDiff: (p) => { const c = p?.today_follow_ups, y = p?.yesterday_today_follow_ups; return c != null && y != null ? c - y : undefined; }, icon: <HeartOutlined />, path: '/health/follow-up-tasks' },
    { key: 'vital-anomaly', title: '体征异常', getValue: (p) => p?.overdue_follow_ups ?? 0, icon: <AlertOutlined />, path: '/health/alert-dashboard' },
    { key: 'ai-pending', title: 'AI 建议待审', getValue: (p) => p?.consultations_this_month ?? 0, icon: <MedicineBoxOutlined />, path: '/health/ai-analysis' },
    { key: 'followup-rate', title: '处理率', getValue: (p) => p?.follow_up_rate ?? 0, icon: <CheckCircleOutlined />, suffix: '%', path: '/health/follow-up-tasks' },
  ],
  nurse: [
    { key: 'today-appointments', title: '今日预约', getValue: (p) => p?.today_appointments ?? 0, getDiff: (p) => { const c = p?.today_appointments, y = p?.yesterday_today_appointments; return c != null && y != null ? c - y : undefined; }, icon: <CalendarOutlined />, path: '/health/appointments' },
    { key: 'today-followups', title: '今日随访', getValue: (p) => p?.today_follow_ups ?? 0, getDiff: (p) => { const c = p?.today_follow_ups, y = p?.yesterday_today_follow_ups; return c != null && y != null ? c - y : undefined; }, icon: <HeartOutlined />, path: '/health/follow-ups' },
    { key: 'overdue', title: '逾期随访', getValue: (p) => p?.overdue_follow_ups ?? 0, getDiff: (p) => { const c = p?.overdue_follow_ups, y = p?.yesterday_overdue_follow_ups; return c != null && y != null ? c - y : undefined; }, icon: <AlertOutlined />, path: '/health/follow-ups' },
    { key: 'vital-rate', title: '体征上报率', getValue: (p) => p?.vital_signs_report_rate ?? 0, icon: <MedicineBoxOutlined />, suffix: '%', path: '/health/vital-signs' },
  ],
  admin: [
    { key: 'patients', title: '患者总数', getValue: (_p, s) => s.patientStats?.total_patients ?? 0, icon: <TeamOutlined />, path: '/health/patients' },
    { key: 'appointments', title: '本月预约', getValue: (_p, s) => s.healthDataStats?.appointments?.this_month ?? 0, icon: <CalendarOutlined />, path: '/health/appointments' },
    { key: 'followup-rate', title: '随访完成率', getValue: (_p, s) => s.followUpStats?.completion_rate ?? 0, icon: <SafetyCertificateOutlined />, suffix: '%', path: '/health/follow-ups' },
    { key: 'vital-rate', title: '体征上报率', getValue: (_p, s) => s.healthDataStats?.vital_signs_report_rate?.report_rate ?? 0, icon: <MedicineBoxOutlined />, suffix: '%', path: '/health/vital-signs' },
  ],
  operator: [
    { key: 'issued', title: '积分发放', getValue: (_p, s) => s.pointsStats?.total_issued ?? 0, icon: <TrophyOutlined />, path: '/health/points' },
    { key: 'spent', title: '积分消费', getValue: (_p, s) => s.pointsStats?.total_spent ?? 0, icon: <ShoppingOutlined />, path: '/health/mall' },
    { key: 'active', title: '活跃账户', getValue: (_p, s) => s.pointsStats?.active_accounts ?? 0, icon: <TeamOutlined />, path: '/health/points' },
    { key: 'articles', title: '内容发布', getValue: (_p, s) => s.patientStats?.total_patients ?? 0, icon: <FileTextOutlined />, path: '/health/content' },
  ],
};

const ROLE_ACTIONS: Record<DashboardRole, QuickActionDef[]> = {
  doctor: [
    { icon: <TeamOutlined />, label: '患者管理', path: '/health/patients' },
    { icon: <CalendarOutlined />, label: '预约管理', path: '/health/appointments' },
    { icon: <HeartOutlined />, label: '随访管理', path: '/health/follow-ups' },
    { icon: <MessageOutlined />, label: '咨询管理', path: '/health/consultations' },
    { icon: <AlertOutlined />, label: '告警中心', path: '/health/alert-dashboard' },
    { icon: <MedicineBoxOutlined />, label: '健康数据', path: '/health/statistics' },
  ],
  health_manager: [
    { icon: <HeartOutlined />, label: '随访管理', path: '/health/follow-up-tasks' },
    { icon: <MedicineBoxOutlined />, label: '体征监测', path: '/health/alert-dashboard' },
    { icon: <MessageOutlined />, label: '患者咨询', path: '/health/consultations' },
    { icon: <TeamOutlined />, label: '患者管理', path: '/health/patients' },
    { icon: <TrophyOutlined />, label: '积分商城', path: '/health/points-products' },
    { icon: <FileTextOutlined />, label: '统计报表', path: '/health/statistics' },
  ],
  nurse: [
    { icon: <HeartOutlined />, label: '随访管理', path: '/health/follow-ups' },
    { icon: <MedicineBoxOutlined />, label: '健康数据', path: '/health/vital-signs' },
    { icon: <CalendarOutlined />, label: '预约管理', path: '/health/appointments' },
    { icon: <AlertOutlined />, label: '告警中心', path: '/health/alert-dashboard' },
    { icon: <TeamOutlined />, label: '患者管理', path: '/health/patients' },
    { icon: <SafetyCertificateOutlined />, label: '健康统计', path: '/health/statistics' },
  ],
  admin: [
    { icon: <TeamOutlined />, label: '患者管理', path: '/health/patients' },
    { icon: <CalendarOutlined />, label: '预约管理', path: '/health/appointments' },
    { icon: <HeartOutlined />, label: '随访管理', path: '/health/follow-ups' },
    { icon: <MedicineBoxOutlined />, label: '健康数据', path: '/health/vital-signs' },
    { icon: <TrophyOutlined />, label: '积分商城', path: '/health/points' },
    { icon: <SettingOutlined />, label: '系统设置', path: '/settings' },
  ],
  operator: [
    { icon: <TrophyOutlined />, label: '积分管理', path: '/health/points' },
    { icon: <FileTextOutlined />, label: '内容管理', path: '/health/content' },
    { icon: <CalendarOutlined />, label: '线下活动', path: '/health/events' },
    { icon: <TeamOutlined />, label: '患者管理', path: '/health/patients' },
    { icon: <SafetyCertificateOutlined />, label: '健康统计', path: '/health/statistics' },
    { icon: <SettingOutlined />, label: '系统设置', path: '/settings' },
  ],
};

// --- Components ---

function StatValue({ value, loading }: { value: number; loading: boolean }) {
  const animatedValue = useCountUp(value);
  if (loading) return <Spin size="small" />;
  return <span className="erp-count-up">{animatedValue.toLocaleString()}</span>;
}

export default function Home() {
  const navigate = useNavigate();
  const role = useDashboardRole();
  const isDark = useThemeMode();
  const fetchUnreadCount = useMessageStore((s) => s.fetchUnreadCount);

  const [personalStats, setPersonalStats] = useState<PersonalStats | null>(null);
  const [personalLoading, setPersonalLoading] = useState(true);
  const [pendingTasks, setPendingTasks] = useState<TaskInfo[]>([]);
  const [recentActivities, setRecentActivities] = useState<AuditLogItem[]>([]);
  const [activitiesLoading, setActivitiesLoading] = useState(true);
  const [drawerItem, setDrawerItem] = useState<ActionItem | null>(null);
  const [drawerOpen, setDrawerOpen] = useState(false);

  const statsData = useStatsData();
  const loading = personalLoading || statsData.loading;

  const welcome = ROLE_WELCOME[role];
  const statDefs = ROLE_STATS[role];
  const quickActions = ROLE_ACTIONS[role];

  useEffect(() => {
    let cancelled = false;
    fetchUnreadCount();

    if (role === 'doctor' || role === 'nurse') {
      pointsApi.getPersonalStats()
        .then((data) => { if (!cancelled) setPersonalStats(data); })
        .catch(() => {})
        .finally(() => { if (!cancelled) setPersonalLoading(false); });
    } else {
      setPersonalLoading(false);
    }

    listPendingTasks(1, 5)
      .then((result) => { if (!cancelled) setPendingTasks(result.data); })
      .catch(() => {});

    listAuditLogs({ page: 1, page_size: 5 })
      .then((result) => {
        if (!cancelled) setRecentActivities(result.data.filter((a) => a.action !== 'login_failed'));
      })
      .catch(() => {})
      .finally(() => { if (!cancelled) setActivitiesLoading(false); });

    return () => { cancelled = true; };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [role]);

  const handleNavigate = useCallback((path: string) => {
    navigate(path);
  }, [navigate]);

  return (
    <div>
      {/* 角色工作台路由 */}
      {role === 'doctor' ? (
        <DoctorWorkbench />
      ) : role === 'health_manager' ? (
        <div style={{ display: 'flex', height: 'calc(100vh - 64px)', overflow: 'hidden', margin: -20 }}>
          <TaskQueue />
          <TaskDetail />
        </div>
      ) : role === 'operator' ? (
        <OperatorWorkbench />
      ) : role === 'admin' ? (
        <AdminDashboard />
      ) : (
        <>
      {/* 欢迎语 */}
      <div className="erp-fade-in" style={{ marginBottom: 24 }}>
        <h2 style={{
          fontSize: 24,
          fontWeight: 700,
          color: isDark ? '#f8fafc' : 'var(--erp-text-primary)',
          margin: '0 0 4px',
          letterSpacing: '-0.5px',
        }}>
          {welcome.title}
        </h2>
        <p style={{ fontSize: 14, color: 'var(--erp-text-secondary)', margin: 0 }}>
          {welcome.subtitle}
        </p>
      </div>

      {/* 统计卡片行 */}
      <div style={{ display: 'grid', gridTemplateColumns: 'repeat(4, 1fr)', gap: 16, marginBottom: 24 }}>
        {statDefs.map((def, i) => {
          const value = def.getValue(personalStats, statsData);
          const diff = def.getDiff?.(personalStats);
          return (
            <div
              key={def.key}
              className={`erp-fade-in erp-fade-in-delay-${i + 1}`}
              style={{
                background: 'var(--erp-bg-card, white)',
                borderRadius: 12,
                border: '1px solid var(--erp-border, #E2E8F0)',
                overflow: 'hidden',
                cursor: 'pointer',
                transition: 'all 0.2s',
              }}
              onClick={() => handleNavigate(def.path)}
              role="button"
              tabIndex={0}
              onKeyDown={(e) => { if (e.key === 'Enter') handleNavigate(def.path); }}
              onMouseEnter={(e) => { e.currentTarget.style.boxShadow = '0 2px 8px rgba(0,0,0,0.06)'; e.currentTarget.style.transform = 'translateY(-1px)'; }}
              onMouseLeave={(e) => { e.currentTarget.style.boxShadow = 'none'; e.currentTarget.style.transform = 'none'; }}
            >
              <div style={{ height: 3, background: STAT_BAR_COLORS[i] || STAT_BAR_COLORS[0] }} />
              <div style={{ padding: '16px 20px' }}>
                <div style={{ fontSize: 12, color: '#94A3B8', marginBottom: 6 }}>{def.title}</div>
                <div style={{ fontSize: 28, fontWeight: 700, lineHeight: 1.2, color: STAT_TEXT_COLORS[i] || STAT_TEXT_COLORS[0] }}>
                  <StatValue value={value} loading={loading} />
                  {def.suffix && <span style={{ fontSize: 14, marginLeft: 2 }}>{def.suffix}</span>}
                </div>
                {diff != null && (
                  <div style={{ fontSize: 11, marginTop: 4, color: diff > 0 ? '#16A34A' : diff < 0 ? '#DC2626' : '#94A3B8' }}>
                    {diff === 0 ? '与昨日持平' : `较昨日 ${diff > 0 ? '+' : ''}${diff}`}
                  </div>
                )}
              </div>
            </div>
          );
        })}
      </div>

      {/* 护士专属工作台 */}
      {role === 'nurse' ? (
        <NurseWorkbench />
      ) : (
        <Row gutter={[16, 16]} style={{ marginBottom: 24 }}>
          <Col xs={24} lg={14}>
            <div className="erp-content-card erp-fade-in erp-fade-in-delay-2">
              <div className="erp-section-header">
                <CheckCircleOutlined className="erp-section-icon" />
                <span className="erp-section-title">待办任务</span>
                <span style={{ marginLeft: 'auto', fontSize: 12, color: 'var(--erp-text-secondary)' }}>
                  {pendingTasks.length} 项待处理
                </span>
              </div>
              <div className="erp-task-list">
                {pendingTasks.length === 0 ? (
                  <Empty description="暂无待办任务" image={Empty.PRESENTED_IMAGE_SIMPLE} />
                ) : (
                  pendingTasks.map((task) => (
                    <div
                      key={task.id}
                      className="erp-task-item"
                      style={{ '--task-color': 'var(--erp-primary)' } as React.CSSProperties}
                      onClick={() => handleNavigate('/workflow')}
                      role="button"
                      tabIndex={0}
                      onKeyDown={(e) => { if (e.key === 'Enter') handleNavigate('/workflow'); }}
                    >
                      <div className="erp-task-item-icon"><PartitionOutlined /></div>
                      <div className="erp-task-item-content">
                        <div className="erp-task-item-title">{task.node_name || task.definition_name || '流程任务'}</div>
                        <div className="erp-task-item-meta">
                          <span>{task.definition_name || '工作流'}</span>
                          <span>{task.status === 'pending' ? '待处理' : task.status}</span>
                        </div>
                      </div>
                      <span className="erp-task-priority erp-task-priority-medium">一般</span>
                      <RightOutlined style={{ color: 'var(--erp-text-tertiary)', fontSize: 12 }} />
                    </div>
                  ))
                )}
              </div>
            </div>
          </Col>

          <Col xs={24} lg={10}>
            <div className="erp-content-card erp-fade-in erp-fade-in-delay-3" style={{ height: '100%' }}>
              <div className="erp-section-header">
                <ClockCircleOutlined className="erp-section-icon" />
                <span className="erp-section-title">最近动态</span>
              </div>
              <div className="erp-activity-list">
                {activitiesLoading ? (
                  <div style={{ textAlign: 'center', padding: 24 }}><Spin /></div>
                ) : recentActivities.length === 0 ? (
                  <Empty description="暂无动态" image={Empty.PRESENTED_IMAGE_SIMPLE} />
                ) : (
                  recentActivities.map((log) => (
                    <div key={log.id} className="erp-activity-item">
                      <div className="erp-activity-dot">
                        {RESOURCE_ICONS[log.resource_type] || <FileTextOutlined />}
                      </div>
                      <div className="erp-activity-content">
                        <div className="erp-activity-text">
                          {formatActionLabel(log.action)}了{formatResourceLabel(log.resource_type)}
                        </div>
                        <div className="erp-activity-time">{formatTimeAgo(log.created_at)}</div>
                      </div>
                    </div>
                  ))
                )}
              </div>
            </div>
          </Col>
        </Row>
      )}

      {/* 快捷入口 */}
      <Row gutter={[16, 16]}>
        <Col span={24}>
          <div className="erp-content-card erp-fade-in erp-fade-in-delay-3">
            <div className="erp-section-header">
              <ThunderboltOutlined className="erp-section-icon" />
              <span className="erp-section-title">快捷入口</span>
            </div>
            <Row gutter={[12, 12]}>
              {quickActions.map((action) => (
                <Col xs={12} sm={8} md={4} key={action.path}>
                  <div
                    className="erp-quick-action"
                    style={{ '--action-color': 'var(--erp-primary)' } as React.CSSProperties}
                    onClick={() => handleNavigate(action.path)}
                    role="button"
                    tabIndex={0}
                    onKeyDown={(e) => { if (e.key === 'Enter') handleNavigate(action.path); }}
                  >
                    <div className="erp-quick-action-icon">{action.icon}</div>
                    <span className="erp-quick-action-label">{action.label}</span>
                  </div>
                </Col>
              ))}
            </Row>
          </div>
        </Col>
      </Row>

      {/* 行动详情抽屉 */}
      <ActionDetailDrawer
        item={drawerItem}
        open={drawerOpen}
        onClose={() => { setDrawerOpen(false); setDrawerItem(null); }}
        onActionComplete={() => {
          setDrawerOpen(false);
          setDrawerItem(null);
        }}
      />
        </>
      )}
    </div>
  );
}