/**
 * Admin 后台 - 通用 UI 组件集合(报刊风)
 *
 * 与前台共用同一套设计语言:
 * - 纸色底(paper)、墨色字(ink)、印报红唯一强调(press)
 * - 方正边框、细线分隔、宋体标题、无圆角、无彩色药丸标签
 */

import { ReactNode } from 'react'

import { ApiError } from './api'

// ── 卡片 ────────────────────────────────────────────────────────

export function Card({
  children,
  className = '',
}: {
  children: ReactNode
  className?: string
}) {
  return (
    <div className={`border border-ink-900 bg-paper-50 ${className}`}>{children}</div>
  )
}

export function CardHeader({
  title,
  description,
  action,
}: {
  title: string
  description?: string
  action?: ReactNode
}) {
  return (
    <div className="border-b border-ink-900 bg-paper-100 px-4 py-2.5 sm:px-5">
      <div className="flex flex-wrap items-center justify-between gap-2">
        <h3 className="font-serif text-sm font-bold text-ink-900">{title}</h3>
        {action}
      </div>
      {description && <p className="mt-1 text-2xs text-ink-500">{description}</p>}
    </div>
  )
}

export function CardBody({
  children,
  className = '',
}: {
  children: ReactNode
  className?: string
}) {
  return <div className={`px-4 py-4 sm:px-5 ${className}`}>{children}</div>
}

// ── 统计卡片 ────────────────────────────────────────────────────

export function StatCard({
  label,
  value,
  hint,
}: {
  label: string
  value: string | number
  hint?: string
}) {
  return (
    <div className="border border-ink-900 bg-paper-50 px-4 py-3.5">
      <span className="text-2xs tracking-[0.2em] text-ink-400">{label}</span>
      <div className="mt-1.5 font-serif text-3xl font-bold tabular-nums leading-none text-ink-900">
        {value}
      </div>
      {hint && <div className="mt-1.5 text-2xs text-ink-400">{hint}</div>}
    </div>
  )
}

// ── 状态标记 ────────────────────────────────────────────────────
// 报刊不用彩色药丸:小方块 + 文字,红=异常/失败,墨=正常,灰=中性

const MARK_STYLES: Record<string, { text: string; mark: string }> = {
  success: { text: 'text-ink-800', mark: 'bg-ink-900' },
  completed: { text: 'text-ink-800', mark: 'bg-ink-900' },
  win: { text: 'text-ink-800', mark: 'bg-ink-900' },
  ok: { text: 'text-ink-800', mark: 'bg-ink-900' },
  running: { text: 'text-ink-600', mark: 'bg-ink-400' },
  info: { text: 'text-ink-600', mark: 'bg-ink-400' },
  queued: { text: 'text-ink-500', mark: 'border border-ink-400' },
  pending: { text: 'text-ink-400', mark: 'bg-ink-300' },
  push: { text: 'text-ink-400', mark: 'bg-ink-300' },
  warning: { text: 'text-press', mark: 'border border-press' },
  failed: { text: 'text-press font-medium', mark: 'bg-press' },
  error: { text: 'text-press font-medium', mark: 'bg-press' },
  loss: { text: 'text-press font-medium', mark: 'bg-press' },
}

export function Badge({
  status,
  children,
}: {
  status: string
  children: ReactNode
}) {
  const s = MARK_STYLES[status] ?? MARK_STYLES.pending
  return (
    <span className={`inline-flex items-center gap-1.5 whitespace-nowrap text-2xs ${s.text}`}>
      <span className={`inline-block h-1.5 w-1.5 ${s.mark}`} aria-hidden="true" />
      {children}
    </span>
  )
}

// ── 数据表格 ────────────────────────────────────────────────────

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export function DataTable<T = any>({
  columns,
  data,
  rowKey,
  emptyText = '暂无数据',
}: {
  columns: { key: string; label: string; render?: (row: T) => ReactNode; width?: string }[]
  data: T[]
  rowKey: (row: T) => string | number
  emptyText?: string
}) {
  if (data.length === 0) {
    return <EmptyState text={emptyText} />
  }

  return (
    <div className="overflow-x-auto">
      <table className="w-full text-left text-sm">
        <thead>
          <tr className="border-b border-ink-900 text-2xs tracking-wider text-ink-500">
            {columns.map(col => (
              <th key={col.key} className="px-3 py-2 font-medium" style={{ width: col.width }}>
                {col.label}
              </th>
            ))}
          </tr>
        </thead>
        <tbody>
          {data.map(row => (
            <tr
              key={rowKey(row)}
              className="border-b border-ink-200 transition-colors hover:bg-paper-100"
            >
              {columns.map(col => (
                <td key={col.key} className="px-3 py-2.5 text-ink-800">
                  {col.render
                    ? col.render(row)
                    : row != null && typeof row === 'object' && col.key in row
                      ? String((row as Record<string, unknown>)[col.key] ?? '—')
                      : '—'}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  )
}

// ── 进度条:同前台置信度细线 ────────────────────────────────────

export function ProgressBar({ value, className = '' }: { value: number; className?: string }) {
  const clamped = Math.max(0, Math.min(100, value))
  return (
    <div className={`h-2 w-full overflow-hidden rounded-full bg-ink-200 ${className}`} role="progressbar" aria-valuenow={clamped}>
      <div
        className="h-full rounded-full bg-press transition-[width] duration-500"
        style={{ width: `${clamped}%` }}
      />
    </div>
  )
}

// ── 空状态:同前台「本版暂无赛程」 ──────────────────────────────

export function EmptyState({ text = '暂无数据', sub }: { text?: string; sub?: string }) {
  return (
    <div className="border-y border-ink-200 py-12 text-center">
      <p className="font-serif text-sm text-ink-600">{text}</p>
      {sub && <p className="mt-1.5 text-xs text-ink-400">{sub}</p>}
    </div>
  )
}

// ── 移动端卡片列表 (替代桌面端表格) ────────────────────────────

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export function MobileCardList<T = any>({
  data,
  renderCard,
  emptyText = '暂无数据',
}: {
  data: T[]
  renderCard: (row: T, index: number) => ReactNode
  emptyText?: string
}) {
  if (data.length === 0) {
    return <EmptyState text={emptyText} />
  }

  return (
    <div className="space-y-3 lg:hidden">
      {data.map((row, idx) => (
        <div key={idx} className="border border-ink-900 bg-paper-50 p-4">
          {renderCard(row, idx)}
        </div>
      ))}
    </div>
  )
}

// ── 响应式表格容器 ──────────────────────────────────────────────

// eslint-disable-next-line @typescript-eslint/no-explicit-any
export function ResponsiveTable<T = any>({
  columns,
  data,
  rowKey,
  cardRender,
  emptyText = '暂无数据',
}: {
  columns: { key: string; label: string; render?: (row: T) => ReactNode; width?: string }[]
  data: T[]
  rowKey: (row: T) => string | number
  cardRender: (row: T, index: number) => ReactNode
  emptyText?: string
}) {
  if (data.length === 0) {
    return <EmptyState text={emptyText} />
  }

  return (
    <>
      {/* 桌面端表格 */}
      <div className="hidden overflow-x-auto lg:block">
        <DataTable columns={columns} data={data} rowKey={rowKey} emptyText={emptyText} />
      </div>
      {/* 移动端卡片 */}
      <MobileCardList data={data} renderCard={cardRender} emptyText={emptyText} />
    </>
  )
}

// ── 小节标题:同前台 section-head ───────────────────────────────

export function SectionHeader({
  title,
  description,
  action,
}: {
  title: string
  description?: string
  action?: ReactNode
}) {
  return (
    <div className="mb-5 flex flex-wrap items-center justify-between gap-3">
      <div>
        <h2 className="section-head text-base">{title}</h2>
        {description && <p className="mt-1.5 text-xs text-ink-500">{description}</p>}
      </div>
      {action}
    </div>
  )
}

// ── 提示条:错误红框(同前台) / 正常墨框 ────────────────────────

export function Alert({
  kind,
  title,
  message,
  onClose,
  action,
}: {
  kind: 'error' | 'ok' | 'info' | 'warning'
  title: string
  message?: string
  onClose?: () => void
  /** 右侧操作按钮(如「去修复」) */
  action?: ReactNode
}) {
  const style =
    kind === 'error'
      ? 'border-press bg-press-wash'
      : kind === 'warning'
        ? 'border-press bg-press-wash/60'
        : kind === 'ok'
          ? 'border-ink-900 bg-paper-100'
          : 'border-ink-300 bg-paper-50'
  const titleCls = kind === 'error' || kind === 'warning' ? 'text-press' : 'text-ink-900'

  return (
    <div className={`flex items-start justify-between gap-3 border px-4 py-3 ${style}`}>
      <div>
        <p className={`flex items-center gap-1.5 text-sm font-medium ${titleCls}`}>
          <span
            className={`inline-block h-1.5 w-1.5 ${kind === 'error' || kind === 'warning' ? 'bg-press' : 'bg-ink-900'}`}
            aria-hidden="true"
          />
          {title}
        </p>
        {message && (
          <p className="mt-0.5 whitespace-pre-wrap text-xs leading-relaxed text-ink-600">
            {message}
          </p>
        )}
      </div>
      <div className="flex items-center gap-2">
        {action}
        {onClose && (
          <button
            onClick={onClose}
            className="text-ink-400 transition-colors hover:text-ink-900"
            aria-label="关闭"
          >
            <svg viewBox="0 0 20 20" className="h-4 w-4" fill="currentColor" aria-hidden="true">
              <path d="M6.3 5.3a1 1 0 011.4 0L10 7.6l2.3-2.3a1 1 0 111.4 1.4L11.4 9l2.3 2.3a1 1 0 01-1.4 1.4L10 10.4l-2.3 2.3a1 1 0 01-1.4-1.4L8.6 9 6.3 6.7a1 1 0 010-1.4z" />
            </svg>
          </button>
        )}
      </div>
    </div>
  )
}

// ── 错误横幅:标准化错误标题/文案/建议动作 ──────────────────────

/** 根据错误对象生成标准化的错误标题、文案与建议动作。 */
export function describeError(err: unknown): { title: string; detail: string; kind: 'error' | 'warning' } {
  if (err instanceof ApiError) {
    const status = err.status
    const apiDetail = typeof err.data === 'object' && err.data && 'detail' in (err.data as object)
      ? String((err.data as { detail: unknown }).detail)
      : ''
    const msg = apiDetail || err.message
    switch (status) {
      case 401:
        return { title: '登录已过期', detail: '请重新登录后继续操作。', kind: 'warning' }
      case 403:
        return { title: '无权访问', detail: msg || '当前账号没有执行该操作的权限。', kind: 'error' }
      case 429:
        return { title: '请求过于频繁', detail: msg || '每分钟最多 10 次预测,请稍后再试。', kind: 'warning' }
      case 502:
        return { title: '上游 LLM 不可用', detail: msg || 'LLM 服务暂时不可用,请稍后重试或切换到更便宜的模型。', kind: 'error' }
      case 503:
        return { title: '服务未就绪', detail: msg || '服务器鉴权未配置,请联系管理员。', kind: 'error' }
      case 0:
        return { title: '网络错误或请求超时', detail: '请检查网络连接后重试。', kind: 'warning' }
    }
    if (status >= 500) {
      return { title: '服务器错误', detail: msg || `HTTP ${status},请稍后重试。`, kind: 'error' }
    }
    return { title: '请求失败', detail: msg || `HTTP ${status}`, kind: 'error' }
  }
  if (err instanceof Error) {
    return { title: '操作失败', detail: err.message, kind: 'error' }
  }
  return { title: '未知错误', detail: String(err), kind: 'error' }
}

/** 统一错误横幅:用于页面级错误展示。 */
export function ErrorBanner({
  err,
  onClose,
}: {
  err: unknown
  onClose?: () => void
}) {
  const { title, detail, kind } = describeError(err)
  return <Alert kind={kind} title={title} message={detail} onClose={onClose} />
}

export function Spinner({ className = '' }: { className?: string }) {
  return (
    <svg
      viewBox="0 0 20 20"
      className={`h-3.5 w-3.5 animate-spin ${className}`}
      fill="none"
      aria-hidden="true"
    >
      <circle cx="10" cy="10" r="7.5" stroke="currentColor" strokeWidth="1.5" strokeOpacity="0.25" />
      <path d="M17.5 10A7.5 7.5 0 0010 2.5" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" />
    </svg>
  )
}

// ── 骨架占位 ────────────────────────────────────────────────────

export function SkeletonBlock({ className = '' }: { className?: string }) {
  return <div className={`skeleton ${className}`} />
}


/** 空状态文本 */
export function EmptyText({ text }: { text: string }) {
  return (
    <div className="py-10 text-center text-sm text-ink-400">
      {text}
    </div>
  )
}

/** Agent 权重条形图 */
export function AgentWeightsBar({ weights, okCount }: { weights: Record<string, number>; okCount: number }) {
  const entries = Object.entries(weights).filter(([, w]) => w > 0)
  if (entries.length === 0) return null
  const total = entries.reduce((s, [, w]) => s + w, 0) || 1
  const colors = ['bg-ink-900', 'bg-ink-700', 'bg-ink-500', 'bg-press', 'bg-ink-300']
  return (
    <div className="mt-2 border-t border-ink-200 pt-2">
      <div className="mb-1 text-2xs text-ink-400">终裁专家权重</div>
      <div className="space-y-1">
        {entries.map(([k, w], i) => (
          <div key={k} className="flex items-center gap-2 text-2xs">
            <div className="h-3.5 flex-1 overflow-hidden rounded-sm bg-ink-200/60">
              <div
                className={`h-full ${colors[i % colors.length]} transition-all duration-500`}
                style={{ width: `${Math.max(3, Math.round((w / total) * 100))}%` }}
              />
            </div>
            <span className="w-12 text-right tabular-nums text-ink-500">
              {Math.round((w / total) * 100)}%
            </span>
            <span className="w-24 truncate text-ink-400" title={k}>{k}</span>
          </div>
        ))}
      </div>
      <div className="mt-1 text-2xs text-ink-400">有效专家：{okCount}/{entries.length}</div>
    </div>
  )
}