// src/renderer/components/meeting/MarkdownRenderer.tsx
// Phase 14.5: react-markdown + remark-gfm 래퍼 — d3roPalette 기반 스타일

import ReactMarkdown from 'react-markdown'
import remarkGfm from 'remark-gfm'
import { Box } from '@mui/material'
import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '@d3ro/ui/theme'
import type { Components } from 'react-markdown'

interface MarkdownRendererProps {
  content: string
}

/**
 * 링크는 앱 창 안에서 이동하지 않는다 — 메인 창이 원격 페이지로 바뀌면 preload API가 그 페이지에 노출된다.
 * 클릭은 main의 openExternal(허용 scheme만)로 넘겨 OS 브라우저에서 연다.
 */
function openLinkExternally(event: React.MouseEvent<HTMLAnchorElement>, href: string | undefined): void {
  event.preventDefault()
  if (!href) return
  void window.electronAPI.system.openExternal({ url: href })
}

const components: Components = {
  a: ({ children, href }) => (
    <Box
      component="a"
      href={href}
      rel="noopener noreferrer"
      onClick={(event: React.MouseEvent<HTMLAnchorElement>) => openLinkExternally(event, href)}
      sx={{ color: d3roPalette.accent.main, textDecoration: 'underline', cursor: 'pointer' }}
    >
      {children}
    </Box>
  ),
  h1: ({ children }) => (
    <Box
      component="h1"
      sx={{
        fontSize: d3roTypo.value.size,
        fontWeight: 600,
        color: d3roPalette.accent.main,
        mt: 2,
        mb: 1,
        borderBottom: `1px solid ${d3roPalette.border.default}`,
        pb: 0.5,
      }}
    >
      {children}
    </Box>
  ),
  h2: ({ children }) => (
    <Box
      component="h2"
      sx={{
        fontSize: d3roTypo.heading.size,
        fontWeight: 600,
        color: d3roPalette.text.primary,
        mt: 1.5,
        mb: 0.75,
      }}
    >
      {children}
    </Box>
  ),
  h3: ({ children }) => (
    <Box
      component="h3"
      sx={{
        fontSize: d3roTypo.body.size,
        fontWeight: 600,
        color: d3roPalette.text.secondary,
        mt: 1,
        mb: 0.5,
      }}
    >
      {children}
    </Box>
  ),
  p: ({ children }) => (
    <Box
      component="p"
      sx={{
        fontSize: d3roTypo.body.size,
        color: d3roPalette.text.primary,
        lineHeight: 1.7,
        mb: 0.75,
        mt: 0,
      }}
    >
      {children}
    </Box>
  ),
  code: ({ children, className }) => {
    const isBlock = className?.startsWith('language-') ?? false
    if (isBlock) {
      return (
        <Box
          component="pre"
          sx={{
            bgcolor: d3roPalette.bg.inset,
            borderRadius: d3roRadius.small,
            p: 1.5,
            overflowX: 'auto',
            my: 1,
            border: `1px solid ${d3roPalette.border.subtle}`,
          }}
        >
          <Box
            component="code"
            sx={{
              fontFamily: d3roFontMono,
              fontSize: d3roTypo.compact.size,
              color: d3roPalette.accent.main,
            }}
          >
            {children}
          </Box>
        </Box>
      )
    }
    return (
      <Box
        component="code"
        sx={{
          fontFamily: d3roFontMono,
          fontSize: d3roTypo.compact.size,
          color: d3roPalette.accent.main,
          bgcolor: d3roPalette.bg.inset,
          px: 0.5,
          py: 0.25,
          borderRadius: d3roRadius.xs,
        }}
      >
        {children}
      </Box>
    )
  },
  table: ({ children }) => (
    <Box
      component="table"
      sx={{
        width: '100%',
        borderCollapse: 'collapse',
        fontSize: d3roTypo.compact.size,
        mb: 1,
        '& th, & td': {
          border: `1px solid ${d3roPalette.border.default}`,
          p: 0.75,
          textAlign: 'left',
        },
        '& th': {
          bgcolor: d3roPalette.bg.chassis,
          color: d3roPalette.text.secondary,
          fontWeight: 600,
        },
        '& tr:nth-of-type(even)': {
          bgcolor: d3roPalette.bg.inset,
        },
      }}
    >
      {children}
    </Box>
  ),
  li: ({ children }) => (
    <Box
      component="li"
      sx={{
        fontSize: d3roTypo.body.size,
        color: d3roPalette.text.primary,
        lineHeight: 1.7,
        mb: 0.25,
      }}
    >
      {children}
    </Box>
  ),
  ul: ({ children }) => (
    <Box
      component="ul"
      sx={{ pl: 2.5, mb: 0.75, mt: 0 }}
    >
      {children}
    </Box>
  ),
  ol: ({ children }) => (
    <Box
      component="ol"
      sx={{ pl: 2.5, mb: 0.75, mt: 0 }}
    >
      {children}
    </Box>
  ),
  blockquote: ({ children }) => (
    <Box
      component="blockquote"
      sx={{
        borderLeft: `3px solid ${d3roPalette.accent.main}`,
        pl: 1.5,
        ml: 0,
        my: 0.75,
        color: d3roPalette.text.secondary,
        fontStyle: 'italic',
      }}
    >
      {children}
    </Box>
  ),
}

export function MarkdownRenderer({ content }: MarkdownRendererProps): React.ReactElement {
  return (
    <Box sx={{ color: d3roPalette.text.primary, fontSize: d3roTypo.body.size }}>
      <ReactMarkdown remarkPlugins={[remarkGfm]} components={components}>
        {content}
      </ReactMarkdown>
    </Box>
  )
}