---
import type { Page } from 'astro'
import { Icon } from 'astro-icon/components'
import { url } from '../../utils/url-utils'
interface Props {
  page: Page
  class?: string
  style?: string
}

const { page, style } = Astro.props

const HIDDEN = -1

const className = Astro.props.class

const ADJ_DIST = 2
const VISIBLE = ADJ_DIST * 2 + 1

// for test
let count = 1
let l = page.currentPage,
  r = page.currentPage
while (0 < l - 1 && r + 1 <= page.lastPage && count + 2 <= VISIBLE) {
  count += 2
  l--
  r++
}
while (0 < l - 1 && count < VISIBLE) {
  count++
  l--
}
while (r + 1 <= page.lastPage && count < VISIBLE) {
  count++
  r++
}

let pages: number[] = []
if (l > 1) pages.push(1)
if (l == 3) pages.push(2)
if (l > 3) pages.push(HIDDEN)
for (let i = l; i <= r; i++) pages.push(i)
if (r < page.lastPage - 2) pages.push(HIDDEN)
if (r == page.lastPage - 2) pages.push(page.lastPage - 1)
if (r < page.lastPage) pages.push(page.lastPage)

const getPageUrl = (p: number) => {
  if (p == 1) return '/'
  return `/${p}/`
}
---

<div class:list={[className, "flex flex-row gap-3 justify-center"]} style={style}>
    <a href={url(page.url.prev || "")} aria-label={page.url.prev ? "Previous Page" : null}
       class:list={["btn-card overflow-hidden rounded-lg text-[var(--primary)] w-11 h-11",
           {"disabled": page.url.prev == undefined}
       ]}
    >
        <Icon name="material-symbols:chevron-left-rounded" class="text-[1.75rem]"></Icon>
    </a>
    <div class="bg-[var(--card-bg)] flex flex-row rounded-lg items-center text-neutral-700 dark:text-neutral-300 font-bold">
        {pages.map((p) => {
            if (p == HIDDEN)
                return <Icon name="material-symbols:more-horiz" class="mx-1"/>;
            if (p == page.currentPage)
                return <div class="h-11 w-11 rounded-lg bg-[var(--primary)] flex items-center justify-center
                    font-bold text-white dark:text-black/70"
                >
                    {p}
                </div>
            return <a href={url(getPageUrl(p))} aria-label=`Page ${p}`
                class="btn-card w-11 h-11 rounded-lg overflow-hidden active:scale-[0.85]"
            >{p}</a>
        })}
    </div>
    <a href={url(page.url.next || "")} aria-label={page.url.next ? "Next Page" : null}
       class:list={["btn-card overflow-hidden rounded-lg text-[var(--primary)] w-11 h-11",
           {"disabled": page.url.next == undefined}
       ]}
    >
        <Icon name="material-symbols:chevron-right-rounded" class="text-[1.75rem]"></Icon>
    </a>
</div>