import { useCallback, useEffect, useState } from 'react'
import { Cable, RefreshCw } from 'lucide-react'
import Modal from '../common/Modal'
import { listSerialPorts } from '../../platform/serial'
import type {
  SerialConfig,
  SerialFlowControl,
  SerialParity,
  SerialPortSummary,
} from '../../../shared/types/serial.types'

interface SerialConnectDialogProps {
  isOpen: boolean
  onClose: () => void
  onConnect: (config: SerialConfig) => void
}

const BAUD_RATES = [9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600]

export default function SerialConnectDialog({
  isOpen,
  onClose,
  onConnect,
}: SerialConnectDialogProps) {
  const [ports, setPorts] = useState<SerialPortSummary[]>([])
  const [path, setPath] = useState('/dev/tty.debug-console')
  const [baudRate, setBaudRate] = useState(115200)
  const [dataBits, setDataBits] = useState<5 | 6 | 7 | 8>(8)
  const [stopBits, setStopBits] = useState<1 | 2>(1)
  const [parity, setParity] = useState<SerialParity>('none')
  const [flowControl, setFlowControl] = useState<SerialFlowControl>('none')
  const [loadingPorts, setLoadingPorts] = useState(false)
  const [error, setError] = useState<string | null>(null)

  const refreshPorts = useCallback(async () => {
    setLoadingPorts(true)
    setError(null)
    try {
      const detected = await listSerialPorts()
      setPorts(detected)
      setPath((currentPath) =>
        detected.length > 0 && !detected.some((port) => port.path === currentPath)
          ? detected[0].path
          : currentPath
      )
    } catch (reason) {
      setError(reason instanceof Error ? reason.message : String(reason))
    } finally {
      setLoadingPorts(false)
    }
  }, [])

  useEffect(() => {
    if (isOpen) void refreshPorts()
  }, [isOpen, refreshPorts])

  const handleConnect = () => {
    if (!path.trim()) {
      setError('请输入串口设备路径')
      return
    }
    onConnect({
      path: path.trim(),
      baudRate,
      dataBits,
      stopBits,
      parity,
      flowControl,
    })
    onClose()
  }

  return (
    <Modal
      isOpen={isOpen}
      onClose={onClose}
      onConfirm={handleConnect}
      title="连接串口"
      description="原生串口终端 · 适用于路由器、交换机、开发板与调试控制台"
      icon={<Cable className="w-5 h-5" />}
      confirmText="打开串口"
      size="lg"
    >
      <div className="space-y-4">
        <section className="rounded-xl border border-dark-700/60 bg-dark-900/30 p-3.5 space-y-3">
          <div className="flex items-center justify-between">
            <label htmlFor="serial-path" className="ui-label mb-0">设备</label>
            <button
              type="button"
              onClick={() => void refreshPorts()}
              className="inline-flex items-center gap-1 text-[11px] text-txt-muted hover:text-content-primary"
            >
              <RefreshCw className={`w-3 h-3 ${loadingPorts ? 'animate-spin' : ''}`} />
              刷新
            </button>
          </div>
          <input
            id="serial-path"
            value={path}
            onChange={(event) => setPath(event.target.value)}
            placeholder="/dev/tty.debug-console"
            className="ui-input font-mono"
            spellCheck={false}
          />
          {ports.length > 0 ? (
            <div className="grid gap-1.5 max-h-32 overflow-y-auto">
              {ports.map((port) => (
                <button
                  key={port.path}
                  type="button"
                  onClick={() => setPath(port.path)}
                  className={`flex items-center justify-between gap-3 px-3 py-2 rounded-lg border text-left transition-colors ${
                    path === port.path
                      ? 'border-accent-blue/60 bg-accent-blue/10 text-content-primary'
                      : 'border-dark-700/50 hover:bg-dark-700/40 text-content-secondary'
                  }`}
                >
                  <span className="font-mono text-xs truncate">{port.path}</span>
                  <span className="text-[10px] text-txt-faint flex-shrink-0">{port.portType}</span>
                </button>
              ))}
            </div>
          ) : (
            <p className="text-[11px] text-txt-faint">
              未枚举到设备时可直接输入路径，例如 /dev/tty.debug-console 或
              /dev/tty.Bluetooth-Incoming-Port。
            </p>
          )}
        </section>

        <section className="grid grid-cols-2 sm:grid-cols-3 gap-3 rounded-xl border border-dark-700/60 bg-dark-900/30 p-3.5">
          <div>
            <label htmlFor="serial-baud" className="ui-label">波特率</label>
            <select
              id="serial-baud"
              value={baudRate}
              onChange={(event) => setBaudRate(Number(event.target.value))}
              className="ui-input-sm"
            >
              {BAUD_RATES.map((rate) => <option key={rate} value={rate}>{rate}</option>)}
            </select>
          </div>
          <div>
            <label htmlFor="serial-data-bits" className="ui-label">数据位</label>
            <select
              id="serial-data-bits"
              value={dataBits}
              onChange={(event) => setDataBits(Number(event.target.value) as 5 | 6 | 7 | 8)}
              className="ui-input-sm"
            >
              {[5, 6, 7, 8].map((value) => <option key={value} value={value}>{value}</option>)}
            </select>
          </div>
          <div>
            <label htmlFor="serial-stop-bits" className="ui-label">停止位</label>
            <select
              id="serial-stop-bits"
              value={stopBits}
              onChange={(event) => setStopBits(Number(event.target.value) as 1 | 2)}
              className="ui-input-sm"
            >
              <option value={1}>1</option>
              <option value={2}>2</option>
            </select>
          </div>
          <div>
            <label htmlFor="serial-parity" className="ui-label">校验</label>
            <select
              id="serial-parity"
              value={parity}
              onChange={(event) => setParity(event.target.value as SerialParity)}
              className="ui-input-sm"
            >
              <option value="none">无</option>
              <option value="odd">奇校验</option>
              <option value="even">偶校验</option>
            </select>
          </div>
          <div className="sm:col-span-2">
            <label htmlFor="serial-flow-control" className="ui-label">流控</label>
            <select
              id="serial-flow-control"
              value={flowControl}
              onChange={(event) => setFlowControl(event.target.value as SerialFlowControl)}
              className="ui-input-sm"
            >
              <option value="none">无</option>
              <option value="software">软件 XON/XOFF</option>
              <option value="hardware">硬件 RTS/CTS</option>
            </select>
          </div>
        </section>

        {error && <p className="text-sm text-red-400">{error}</p>}
      </div>
    </Modal>
  )
}