import {
  Breadcrumb,
  Card,
  Icon,
  IconButton,
  Paragraph,
  Space,
  Tag,
  Text,
  Title,
  toast,
  type BreadcrumbItem,
} from '@stash/ui'
import { useEffect, useState } from 'react'
import type { ItemDetailModel } from '../../data/detail'
import { resolveHref } from '../../data/detail'
import type { RelatedItem } from '../../data/types'
import { RelatedList } from './RelatedList'

/**
 * 条目详情页：应用与电影共用。
 *
 * 版式：面包屑 + 标题 + 主图（方形头像 / 竖版海报）+ 标签行 + 一句话评价 + 正文
 * + 操作条（浏览 / 点赞 / 分享 / 跳转）+ 可选横幅 + 「推荐阅读」。
 * 具体形态由 ItemDetailModel 决定，这里不判断条目类型。
 */
type ItemDetailViewProps = {
  /** 条目业务键：浏览 / 点赞要写回数据库 */
  itemKey: string
  crumbs: BreadcrumbItem[]
  model: ItemDetailModel
  related: RelatedItem[]
  onNavigate: (href: string) => void
  onOpenItem: (itemId: string) => void
  /** 打开编辑 Drawer */
  onEdit: () => void
  /** 只有登录后才显示 [编辑] */
  canEdit: boolean
}

export function ItemDetailView({
  itemKey,
  crumbs,
  model,
  related,
  onNavigate,
  onOpenItem,
  onEdit,
  canEdit,
}: ItemDetailViewProps) {
  const [views, setViews] = useState(model.views)
  const [likes, setLikes] = useState(model.likes)
  // 历史数据可能是裸域名或占位符 #；统一解析成可跳转地址后再渲染
  const jumpHref = resolveHref(model.href)
  const [liked, setLiked] = useState(() => {
    try {
      return window.localStorage.getItem(`stash-liked:${itemKey}`) === '1'
    } catch {
      return false
    }
  })

  // 进入详情页记一次浏览（每个页面打开一次）
  useEffect(() => {
    let alive = true
    fetch(`/api/items/${encodeURIComponent(itemKey)}/view`, {
      method: 'POST',
      credentials: 'same-origin',
    })
      .then((response) => (response.ok ? response.json() : null))
      .then((payload: { views?: number; likes?: number } | null) => {
        if (!alive || payload === null) return
        if (typeof payload.views === 'number') setViews(payload.views)
        if (typeof payload.likes === 'number') setLikes(payload.likes)
      })
      .catch(() => undefined)

    return () => {
      alive = false
    }
  }, [itemKey])

  const toggleLike = () => {
    const next = !liked
    setLiked(next)
    setLikes((current) => Math.max(0, current + (next ? 1 : -1)))

    try {
      window.localStorage.setItem(`stash-liked:${itemKey}`, next ? '1' : '0')
    } catch {
      // 隐私模式下 localStorage 不可用，忽略即可
    }

    fetch(`/api/items/${encodeURIComponent(itemKey)}/like`, {
      method: 'POST',
      credentials: 'same-origin',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ liked: next }),
    })
      .then((response) => (response.ok ? response.json() : null))
      .then((payload: { views?: number; likes?: number } | null) => {
        if (payload === null) return
        if (typeof payload.views === 'number') setViews(payload.views)
        if (typeof payload.likes === 'number') setLikes(payload.likes)
      })
      .catch(() => undefined)
  }

  const share = () => {
    const url = window.location.href
    const clipboard = navigator.clipboard
    if (clipboard === undefined) {
      toast.error('当前浏览器不支持复制，请手动复制地址栏')
      return
    }
    void clipboard
      .writeText(url)
      .then(() => toast.success('链接已复制'))
      .catch(() => toast.error('复制失败，请手动复制地址栏'))
  }
  return (
    <div className="detail-view item-view">
      <Card padding="none" className="detail-nav">
        <Breadcrumb className="detail-breadcrumb" items={crumbs} onNavigate={onNavigate} />
      </Card>

      <Card padding="none" className="item-card">
        <Title level={1} as="h2" weight="semibold" className="item-title">
          {model.title}
          {canEdit && (
            <button type="button" className="item-edit" title="编辑条目" onClick={onEdit}>
              [编辑]
            </button>
          )}
        </Title>

        <div className={`item-cover item-cover--${model.shape}`}>
          {model.cover !== undefined ? (
            <img src={model.cover} alt={model.title} loading="lazy" />
          ) : (
            <span className="item-cover-letter">{model.fallbackIcon ?? '•'}</span>
          )}
        </div>

        {model.tags.length > 0 && (
          <Space gap="sm" wrap>
            {model.tags.map((tag) => (
              <Tag key={tag} tone="primary" className="item-tag">
                {tag}
              </Tag>
            ))}
          </Space>
        )}

        {model.comment !== undefined && (
          <p className="item-quote">
            <span className="item-quote-mark" aria-hidden="true">
              “
            </span>
            <span className="item-quote-text">{model.comment}</span>
          </p>
        )}

        {model.paragraphs.map((paragraph, index) => (
          <Paragraph
            key={`${index}-${paragraph.slice(0, 8)}`}
            tone="sub"
            size="md"
            className="item-desc"
          >
            {paragraph}
          </Paragraph>
        ))}

        <div className="item-actions">
          <Space gap="sm">
            <button
              type="button"
              className="item-stat"
              title="浏览量"
              onClick={() => toast.success(`浏览量 ${views}`)}
            >
              <Icon name="eye_line" />
              <Text size="xs" tone="sub">
                {views}
              </Text>
            </button>
            <button
              type="button"
              className={`item-stat${liked ? ' is-liked' : ''}`}
              title={liked ? '取消点赞' : '点赞'}
              aria-pressed={liked}
              onClick={toggleLike}
            >
              <Icon name="thumb_up_2_line" />
              <Text size="xs" tone="sub">
                {likes}
              </Text>
            </button>
            <IconButton
              label="分享链接"
              size="sm"
              icon={<Icon name="share_3_line" />}
              onClick={share}
            />
          </Space>

          {/* 没有真实地址（空 / # / 不安全协议）时置灰，避免打开错误页面 */}
          {jumpHref === undefined ? (
            <button type="button" className="item-jump" disabled title="暂无跳转地址，可在编辑里添加">
              跳转到
              <Icon name="a-external_link_line1" />
            </button>
          ) : (
            <a className="item-jump" href={jumpHref} target="_blank" rel="noreferrer">
              跳转到
              <Icon name="a-external_link_line1" />
            </a>
          )}
        </div>

        {model.banner !== undefined && (
          <img className="item-banner" src={model.banner} alt="" loading="lazy" />
        )}
      </Card>

      <RelatedList items={related} onOpen={onOpenItem} />
    </div>
  )
}