import { type RefObject } from 'react'
import { Admonition } from 'ui-patterns/admonition'

import CopyButton from '@/components/ui/CopyButton'
import { BASE_PATH } from '@/lib/constants'

interface CopyPromptAdmonitionProps {
  stepsContainerRef: RefObject<HTMLDivElement | null>
}

export function CopyPromptAdmonition({ stepsContainerRef }: CopyPromptAdmonitionProps) {
  const normalizeTextLines = (value: string) => {
    return value
      .split('\n')
      .map((line) => line.trim())
      .filter(Boolean)
      .join('\n')
  }

  const getStepTextContent = (contentElement: HTMLElement) => {
    const clone = contentElement.cloneNode(true) as HTMLElement
    clone
      .querySelectorAll('pre, button, svg, input, textarea, select, [aria-hidden="true"]')
      .forEach((element) => {
        element.remove()
      })

    clone.querySelectorAll('p, div').forEach((el) => {
      el.appendChild(document.createTextNode('\n'))
    })

    const text = clone.textContent ?? ''
    return normalizeTextLines(text)
  }

  const getStepCodeSnippets = (contentElement: HTMLElement) => {
    const snippets: Array<{ label: string; snippet: string }> = []
    const seen = new Set<string>()

    const addSnippet = (label: string, snippet: string) => {
      if (!snippet || seen.has(snippet)) return
      seen.add(snippet)
      snippets.push({ label, snippet })
    }

    const tabContents = Array.from(
      contentElement.querySelectorAll('[data-connect-tab-content]')
    ) as HTMLElement[]

    tabContents.forEach((tabContent) => {
      const label = tabContent.getAttribute('data-tab-label') || 'Code'
      const tabSnippets = Array.from(tabContent.querySelectorAll('pre'))
        .map((pre) => pre.textContent?.trim())
        .filter((snippet): snippet is string => Boolean(snippet))

      if (tabSnippets.length === 0) {
        const inlineSnippets = Array.from(tabContent.querySelectorAll('code'))
          .filter((code) => !code.closest('pre') && code.closest('.font-mono'))
          .map((code) => code.textContent?.trim())
          .filter((snippet): snippet is string => Boolean(snippet))
        inlineSnippets.forEach((snippet, index) => {
          const inlineLabel = inlineSnippets.length > 1 ? `${label} (part ${index + 1})` : label
          addSnippet(inlineLabel, snippet)
        })
        return
      }

      tabSnippets.forEach((snippet, index) => {
        const tabLabel = tabSnippets.length > 1 ? `${label} (part ${index + 1})` : label
        addSnippet(tabLabel, snippet)
      })
    })

    contentElement.querySelectorAll('pre').forEach((pre) => {
      if (pre.closest('[data-connect-tab-content]')) return
      const snippet = pre.textContent?.trim()
      if (snippet) addSnippet('Code', snippet)
    })

    contentElement.querySelectorAll('code').forEach((code) => {
      if (code.closest('pre')) return
      if (code.closest('[data-connect-tab-content]')) return
      if (!code.closest('.font-mono')) return
      const snippet = code.textContent?.trim()
      if (snippet) addSnippet('Code', snippet)
    })

    return snippets
  }

  const handleCopyPrompt = () => {
    const stepElements = stepsContainerRef.current?.querySelectorAll('[data-connect-step]')
    if (!stepElements?.length) return ''

    const promptContent = Array.from(stepElements)
      .map((stepElement, index) => {
        const title = stepElement.getAttribute('data-step-title') ?? `Step ${index + 1}`
        const description = stepElement.getAttribute('data-step-description') ?? ''
        const contentElement = stepElement.querySelector(
          '[data-step-content]'
        ) as HTMLElement | null

        const details = contentElement ? getStepTextContent(contentElement) : ''
        const codeSnippets = contentElement ? getStepCodeSnippets(contentElement) : []

        const sections = [
          `${index + 1}. ${title}`,
          description,
          details ? `Details:\n${details}` : null,
          codeSnippets.length
            ? `Code:\n${codeSnippets
                .map(({ label, snippet }) => `File: ${label}\n\`\`\`\n${snippet}\n\`\`\``)
                .join('\n\n')}`
            : null,
        ].filter(Boolean)

        return sections.join('\n')
      })
      .join('\n\n')

    return promptContent
  }

  return (
    <Admonition
      type="tip"
      showIcon={false}
      layout="horizontal"
      actions={<CopyButton type="default" copyLabel="Copy prompt" asyncText={handleCopyPrompt} />}
    >
      <div className="absolute -inset-16 z-0 opacity-50">
        <img
          src={`${BASE_PATH}/img/reports/bg-grafana-dark.svg`}
          alt="Briven Grafana"
          className="w-full h-full object-cover object-right hidden dark:block"
        />
        <img
          src={`${BASE_PATH}/img/reports/bg-grafana-light.svg`}
          alt="Briven Grafana"
          className="w-full h-full object-cover object-right dark:hidden"
        />
        <div className="absolute inset-0 bg-linear-to-r from-background-alternative to-transparent" />
      </div>

      <div className="relative flex flex-col md:flex-row md:items-center gap-y-2 md:gap-x-8 justify-between">
        <div className="flex flex-col gap-y-0.5">
          <p className="heading-default">Give your agent everything it needs</p>
        </div>
      </div>
    </Admonition>
  )
}