import React, { useEffect } from 'react'
import { graphql } from 'gatsby'
import Layout from '../components/layout'
import { MDXRenderer } from 'gatsby-plugin-mdx'
import { MDXProvider } from '@mdx-js/react'

const MdLeakH1 = props => <h2 {...props}># {props.children}</h2>
const MdLeakH2 = props => <h3 {...props}>## {props.children}</h3>
const MdLeakH3 = props => <h4 {...props}>### {props.children}</h4>
const MdLeakH4 = props => <h5 {...props}>#### {props.children}</h5>

const components = {
  h1: MdLeakH1,
  h2: MdLeakH2,
  h3: MdLeakH3,
  h4: MdLeakH4,
}

export default function Template({
  data, // this prop will be injected by the GraphQL query below.
}) {
  const {
    frontmatter: { title, path },
    body,
  } = data.mdx

  useEffect(() => {
    document.title = `ctdo - ${title.toLowerCase()}`
  }, [title])

  return (
    <Layout path={path}>
      <MdLeakH1>{title}</MdLeakH1>
      <MDXProvider components={components}>
        <MDXRenderer>{body}</MDXRenderer>
      </MDXProvider>
    </Layout>
  )
}

export const pageQuery = graphql`
  query($slug: String!) {
    mdx(fields: { slug: { eq: $slug } }) {
      id
      excerpt(pruneLength: 160)
      body
      frontmatter {
        title
        date(formatString: "MMMM DD, YYYY")
        description
      }
    }
  }
`