import { useEffect, useRef, useState } from 'react';
import styles from '../styles.module.css';
import { getDeviceRealtime } from '../../../services/api';
import { getDevicePhoto } from '../../../utils/devicePhoto';

interface Device {
  id: number;
  name: string;
  code: string;
  device_type: string;
  status: string;
  model?: string;
  manufacturer?: string;
  rated_power?: number;
}

interface DeviceInfoPanelProps {
  device: Device | null;
  onClose: () => void;
  onViewDetail: (device: Device) => void;
}

interface ParamDef {
  key: string;
  label: string;
  unit: string;
}

const PARAMS_BY_TYPE: Record<string, ParamDef[]> = {
  pv_inverter: [
    { key: 'power', label: '功率', unit: 'kW' },
    { key: 'daily_energy', label: '日发电量', unit: 'kWh' },
    { key: 'total_energy', label: '累计发电', unit: 'kWh' },
    { key: 'dc_voltage', label: '直流电压', unit: 'V' },
    { key: 'ac_voltage', label: '交流电压', unit: 'V' },
    { key: 'temperature', label: '温度', unit: '℃' },
  ],
  heat_pump: [
    { key: 'power', label: '功率', unit: 'kW' },
    { key: 'cop', label: 'COP', unit: '' },
    { key: 'inlet_temp', label: '进水温度', unit: '℃' },
    { key: 'outlet_temp', label: '出水温度', unit: '℃' },
    { key: 'flow_rate', label: '流量', unit: 'm³/h' },
    { key: 'outdoor_temp', label: '室外温度', unit: '℃' },
  ],
  meter: [
    { key: 'power', label: '功率', unit: 'kW' },
    { key: 'voltage', label: '电压', unit: 'V' },
    { key: 'current', label: '电流', unit: 'A' },
    { key: 'power_factor', label: '功率因数', unit: '' },
  ],
  sensor: [
    { key: 'temperature', label: '温度', unit: '℃' },
    { key: 'humidity', label: '湿度', unit: '%' },
  ],
  heat_meter: [
    { key: 'heat_power', label: '热功率', unit: 'kW' },
    { key: 'flow_rate', label: '流量', unit: 'm³/h' },
    { key: 'supply_temp', label: '供水温度', unit: '℃' },
    { key: 'return_temp', label: '回水温度', unit: '℃' },
    { key: 'cumulative_heat', label: '累计热量', unit: 'GJ' },
  ],
};

const STATUS_COLORS: Record<string, string> = {
  online: '#00ff88',
  offline: '#666666',
  alarm: '#ff4757',
  maintenance: '#ff8c00',
};

const STATUS_LABELS: Record<string, string> = {
  online: '在线',
  offline: '离线',
  alarm: '告警',
  maintenance: '维护',
};

export default function DeviceInfoPanel({ device, onClose, onViewDetail }: DeviceInfoPanelProps) {
  const [realtimeData, setRealtimeData] = useState<Record<string, { value: number; unit: string; timestamp: string }>>({});
  const timerRef = useRef<ReturnType<typeof setInterval> | null>(null);

  useEffect(() => {
    if (!device) {
      setRealtimeData({});
      return;
    }

    const fetchData = async () => {
      try {
        const resp = await getDeviceRealtime(device.id) as any;
        // API returns { device: {...}, data: { power: {...}, ... } }
        const realtimeMap = resp?.data ?? resp;
        setRealtimeData(realtimeMap as Record<string, { value: number; unit: string; timestamp: string }>);
      } catch {
        // ignore fetch errors
      }
    };

    fetchData();
    timerRef.current = setInterval(fetchData, 5000);

    return () => {
      if (timerRef.current) clearInterval(timerRef.current);
    };
  }, [device?.id]);

  if (!device) return null;

  const params = PARAMS_BY_TYPE[device.device_type] || [];

  return (
    <div className={styles.deviceInfoPanel}>
      <div className={styles.infoPanelHeader}>
        <span className={styles.infoPanelTitle}>{device.name}</span>
        <button className={styles.closeBtn} onClick={onClose}>✕</button>
      </div>

      <div style={{ padding: '0 12px 8px', textAlign: 'center' }}>
        <img src={getDevicePhoto(device.device_type)} alt={device.name}
          style={{ width: '100%', height: 120, borderRadius: 8, objectFit: 'cover', border: '1px solid rgba(0,212,255,0.2)' }} />
      </div>

      <div>
        <div className={styles.paramRow}>
          <span className={styles.paramLabel}>状态</span>
          <span
            style={{
              padding: '2px 10px',
              borderRadius: 4,
              fontSize: 12,
              fontWeight: 600,
              color: '#fff',
              backgroundColor: STATUS_COLORS[device.status] || '#666',
            }}
          >
            {STATUS_LABELS[device.status] || device.status}
          </span>
        </div>
        {device.model && (
          <div className={styles.paramRow}>
            <span className={styles.paramLabel}>型号</span>
            <span className={styles.paramValue}>{device.model}</span>
          </div>
        )}
        {device.manufacturer && (
          <div className={styles.paramRow}>
            <span className={styles.paramLabel}>厂家</span>
            <span className={styles.paramValue}>{device.manufacturer}</span>
          </div>
        )}
        {device.rated_power != null && (
          <div className={styles.paramRow}>
            <span className={styles.paramLabel}>额定功率</span>
            <span className={styles.paramValue}>{device.rated_power} kW</span>
          </div>
        )}
      </div>

      <div style={{ marginTop: 12 }}>
        {params.map(param => {
          const data = realtimeData[param.key];
          const valueStr = data != null ? `${data.value}${param.unit ? ' ' + param.unit : ''}` : '--';
          return (
            <div key={param.key} className={styles.paramRow}>
              <span className={styles.paramLabel}>{param.label}</span>
              <span className={styles.paramValue}>{valueStr}</span>
            </div>
          );
        })}
      </div>

      <button className={styles.detailBtn} onClick={() => onViewDetail(device)}>
        查看详情
      </button>
    </div>
  );
}