import { useState } from 'react'
import { useVesselTracks } from '../hooks/useVesselTracks'
import { useTrackStore } from '../stores/trackStore'

interface TrackQueryPanelProps {
  /** 최근위치에서 클릭하여 넘어온 MMSI */
  initialMmsi?: string
}

/** 기본 시간 범위: 지금부터 24시간 전 */
function getDefaultTimeRange(): { start: string; end: string } {
  const now = new Date()
  const yesterday = new Date(now.getTime() - 24 * 60 * 60 * 1000)
  return {
    start: toLocalISOString(yesterday),
    end: toLocalISOString(now),
  }
}

function toLocalISOString(d: Date): string {
  const pad = (n: number) => String(n).padStart(2, '0')
  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`
}

export default function TrackQueryPanel({ initialMmsi }: TrackQueryPanelProps) {
  const { start, end } = getDefaultTimeRange()
  const [mmsiInput, setMmsiInput] = useState(initialMmsi || '')
  const [startTime, setStartTime] = useState(start)
  const [endTime, setEndTime] = useState(end)

  const { fetchTracks, clearTracks } = useVesselTracks()
  const loading = useTrackStore((s) => s.loading)
  const tracks = useTrackStore((s) => s.tracks)

  const handleQuery = () => {
    const mmsiList = mmsiInput
      .split(/[,\s]+/)
      .map((s) => s.trim())
      .filter(Boolean)
    if (mmsiList.length === 0) return

    const startISO = startTime.replace('T', ' ') + ':00'
    const endISO = endTime.replace('T', ' ') + ':00'
    fetchTracks(mmsiList, startISO, endISO)
  }

  return (
    <div className="space-y-3">
      {/* MMSI 입력 */}
      <div>
        <label className="mb-1 block text-xs font-medium text-muted">
          MMSI (쉼표로 구분)
        </label>
        <input
          type="text"
          value={mmsiInput}
          onChange={(e) => setMmsiInput(e.target.value)}
          placeholder="440113620, 441027000"
          className="w-full rounded-md border border-border bg-surface px-3 py-1.5 text-sm text-foreground placeholder:text-muted focus:border-primary focus:outline-none"
        />
      </div>

      {/* 시간 범위 */}
      <div className="grid grid-cols-2 gap-2">
        <div>
          <label className="mb-1 block text-xs font-medium text-muted">시작</label>
          <input
            type="datetime-local"
            value={startTime}
            onChange={(e) => setStartTime(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-2 py-1.5 text-xs text-foreground focus:border-primary focus:outline-none"
          />
        </div>
        <div>
          <label className="mb-1 block text-xs font-medium text-muted">종료</label>
          <input
            type="datetime-local"
            value={endTime}
            onChange={(e) => setEndTime(e.target.value)}
            className="w-full rounded-md border border-border bg-surface px-2 py-1.5 text-xs text-foreground focus:border-primary focus:outline-none"
          />
        </div>
      </div>

      {/* 버튼 */}
      <div className="flex gap-2">
        <button
          onClick={handleQuery}
          disabled={loading || !mmsiInput.trim()}
          className="flex-1 rounded-md bg-primary px-3 py-1.5 text-xs font-medium text-white hover:bg-primary/90 disabled:opacity-50 transition"
        >
          {loading ? '조회 중...' : '항적 조회'}
        </button>
        {tracks.length > 0 && (
          <button
            onClick={clearTracks}
            className="rounded-md border border-border px-3 py-1.5 text-xs text-muted hover:bg-surface-hover transition"
          >
            초기화
          </button>
        )}
      </div>

      {/* 결과 요약 */}
      {tracks.length > 0 && (
        <div className="rounded-lg border border-border p-2 text-xs text-muted">
          <div className="font-medium text-foreground">{tracks.length}척 항적 로드</div>
          {tracks.map((t) => (
            <div key={t.vesselId} className="mt-1 flex justify-between">
              <span>{t.shipName || t.vesselId}</span>
              <span>{t.geometry.length} pts</span>
            </div>
          ))}
        </div>
      )}
    </div>
  )
}