import { Icon, IconButton, Tag } from '@stash/ui'
import { fillHeaderText, type HeaderItem, type SettingsTone } from '../../settings'

/**
 * 顶部栏：左品牌、中间滚动信息（可在 /admin 配置）、右侧操作图标。
 * 外层 <header> 由 Layout 提供，这里只渲染栏内的内容。
 */
type SiteHeaderProps = {
  projectCount: number
  /** 用于展示的第一个项目名，没有项目时留空 */
  sampleProject?: string
  live: boolean
  /** 页头滚动信息；为空时用默认三条 */
  headerItems: HeaderItem[]
  headerEnabled: boolean
  /** 滚动一轮的秒数 */
  headerSpeed: number
  /** 是否已登录：决定右侧是「登录」还是「退出登录」 */
  authenticated: boolean
  username?: string
  onFocusSearch: () => void
  onLogin: () => void
  onLogout: () => void
  onSettings: () => void
}

const tagTone: Record<SettingsTone, 'neutral' | 'primary' | 'success'> = {
  plain: 'neutral',
  neutral: 'neutral',
  primary: 'primary',
  success: 'success',
}

type InfoGroupProps = {
  items: HeaderItem[]
  projectCount: number
  sampleProject?: string
  live: boolean
  'aria-hidden'?: boolean
}

/** 运行信息：同一份内容渲染三遍，轨道平移 1/3 形成无缝滚动 */
function InfoGroup({
  items,
  projectCount,
  sampleProject,
  live,
  'aria-hidden': ariaHidden,
}: InfoGroupProps) {
  const context = { count: projectCount, project: sampleProject, live }

  return (
    <span className="header-ticker-group" aria-hidden={ariaHidden}>
      {items.map((item, index) => (
        <span className="header-ticker-item" key={`${index}-${item.text}`}>
          {item.tag !== undefined && item.tag !== null && item.tag !== '' && (
            <Tag tone={tagTone[item.tone]} shape="rounded">
              {item.tag}
            </Tag>
          )}
          {fillHeaderText(item.text, context)}
        </span>
      ))}
    </span>
  )
}

export function SiteHeader({
  projectCount,
  sampleProject,
  live,
  headerItems,
  headerEnabled,
  headerSpeed,
  authenticated,
  username,
  onFocusSearch,
  onLogin,
  onLogout,
  onSettings,
}: SiteHeaderProps) {
  return (
    <div className="site-header-inner">
      <a className="site-brand" href="/" aria-label="Stash 首页">
        <span className="site-brand-mark" aria-hidden="true">
          S
        </span>
        <span className="site-brand-name">STASH</span>
      </a>

      {headerEnabled && (
        <div className="header-ticker" role="status" aria-label="运行状态">
          <div
            className="header-ticker-track"
            style={{ animationDuration: `${headerSpeed}s` }}
          >
            <InfoGroup
              items={headerItems}
              projectCount={projectCount}
              sampleProject={sampleProject}
              live={live}
            />
            <InfoGroup
              items={headerItems}
              projectCount={projectCount}
              sampleProject={sampleProject}
              live={live}
              // 后两份只用于视觉无缝，读屏忽略
              aria-hidden
            />
            <InfoGroup
              items={headerItems}
              projectCount={projectCount}
              sampleProject={sampleProject}
              live={live}
              aria-hidden
            />
          </div>
        </div>
      )}

      <div className="header-actions">
        <IconButton
          label="聚焦搜索框（Ctrl+K）"
          icon={<Icon name="search_3_line" />}
          onClick={onFocusSearch}
        />
        {authenticated && (
          <IconButton label="站点设置" icon={<Icon name="settings_1_line" />} onClick={onSettings} />
        )}
        {authenticated ? (
          <IconButton
            label={username === undefined ? '退出登录' : `退出登录（${username}）`}
            icon={<Icon name="exit_line" />}
            onClick={onLogout}
          />
        ) : (
          <IconButton label="登录" icon={<Icon name="user_3_line" />} onClick={onLogin} />
        )}
      </div>
    </div>
  )
}