'use client'

import { useEffect, useRef } from 'react'
import { createPortal } from 'react-dom'

export function PerformanceSurveyExportDialog({
  open,
  positionName,
  monthLabel,
  employeeSummary,
  assessmentCount,
  busy,
  error,
  onClose,
  onExport,
}: {
  open: boolean
  positionName: string
  monthLabel: string
  employeeSummary: string
  assessmentCount: number
  busy: boolean
  error: string | null
  onClose: () => void
  onExport: () => void
}) {
  const exportButtonRef = useRef<HTMLButtonElement>(null)

  useEffect(() => {
    if (!open) return
    const previousActiveElement = document.activeElement as HTMLElement | null
    window.requestAnimationFrame(() => exportButtonRef.current?.focus())
    const onKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape' && !busy) onClose()
    }
    document.addEventListener('keydown', onKeyDown)
    return () => {
      document.removeEventListener('keydown', onKeyDown)
      previousActiveElement?.focus()
    }
  }, [busy, onClose, open])

  if (!open || typeof document === 'undefined') return null

  return createPortal(
    <div
      className="fixed inset-0 z-[100] flex items-end justify-center bg-black/45 p-0 sm:items-center sm:p-5"
      onMouseDown={(event) => {
        if (event.target === event.currentTarget && !busy) onClose()
      }}
    >
      <section
        role="dialog"
        aria-modal="true"
        aria-labelledby="performance-survey-export-title"
        aria-describedby="performance-survey-export-description"
        className="w-full border border-[#d0d5dd] bg-white shadow-[0_18px_45px_rgba(15,23,42,0.18)] sm:max-w-lg sm:rounded-xl"
      >
        <div className="flex items-start justify-between gap-4 border-b border-[#e2e2e2] px-5 py-4">
          <div className="min-w-0">
            <h2 id="performance-survey-export-title" className="text-[18px] font-bold text-[#1a1c1c]">
              导出公共看板
            </h2>
            <p id="performance-survey-export-description" className="mt-1 text-[13px] leading-5 text-[#5f5e5e]">
              生成 WPS/Excel 可直接打开的 .xlsx 表格。
            </p>
          </div>
          <button
            type="button"
            aria-label="关闭导出窗口"
            disabled={busy}
            onClick={onClose}
            className="flex h-10 w-10 shrink-0 items-center justify-center rounded border border-transparent text-[22px] leading-none text-[#5f5e5e] transition-colors hover:border-[#d0d5dd] hover:bg-[#f7f7f7] focus:outline-none focus:ring-2 focus:ring-[#0050cb] disabled:opacity-40"
          >
            ×
          </button>
        </div>

        <dl className="grid grid-cols-2 border-b border-[#e2e2e2] bg-[#f8f9fb] sm:grid-cols-4">
          {[
            ['岗位', positionName],
            ['月份', monthLabel],
            ['人员范围', employeeSummary],
            ['考核项', `${assessmentCount} 项`],
          ].map(([label, value]) => (
            <div key={label} className="min-w-0 border-b border-[#e2e2e2] px-4 py-3 last:border-b-0 sm:border-b-0 sm:border-r sm:last:border-r-0">
              <dt className="text-[11px] font-semibold text-[#727687]">{label}</dt>
              <dd className="mt-1 truncate text-[13px] font-bold text-[#1a1c1c]" title={value}>{value}</dd>
            </div>
          ))}
        </dl>

        <div className="px-5 py-4">
          <p className="text-[13px] font-medium leading-6 text-[#475467]">
            表格包含岗位、考核月份、姓名、工号、组织、职级及全部考核项得分。支持保存位置选择的浏览器会先打开本地路径窗口；其他浏览器将保存到默认下载目录。
          </p>
          {error && (
            <div role="alert" className="mt-3 rounded border border-[#ffdad6] bg-[#fff6f4] px-3 py-2 text-[12px] font-semibold leading-5 text-[#93000a]">
              {error}
            </div>
          )}
        </div>

        <div className="flex flex-col-reverse gap-2 border-t border-[#e2e2e2] px-5 py-4 sm:flex-row sm:justify-end">
          <button
            type="button"
            disabled={busy}
            onClick={onClose}
            className="min-h-11 rounded border border-[#c9c9c9] bg-white px-4 text-[13px] font-bold text-[#1a1c1c] transition-colors hover:border-[#1a1c1c] hover:bg-[#f7f7f7] focus:outline-none focus:ring-2 focus:ring-[#0050cb] disabled:opacity-50"
          >
            取消
          </button>
          <button
            ref={exportButtonRef}
            type="button"
            disabled={busy}
            onClick={onExport}
            className="min-h-11 rounded bg-[#0050cb] px-5 text-[13px] font-bold text-white transition-colors hover:bg-[#003f9f] focus:outline-none focus:ring-2 focus:ring-[#0050cb] focus:ring-offset-2 disabled:cursor-wait disabled:opacity-60"
          >
            {busy ? '正在生成表格…' : '选择保存位置并导出'}
          </button>
        </div>
      </section>
    </div>,
    document.body,
  )
}