const HEADERS = "headers"
const PATH = "path"
const TAGS = "tags"
const TITLE = "title"

const SEARCH_TIMEOUT_MS = 100
var SEARCH_TIMEOUT_ID = -1

const fuse = new Fuse(data, {
  keys: [
    {
      name: HEADERS,
      weight: 0.2
    },
    {
      name: PATH,
      weight: 0.1
    },
    {
      name: TAGS,
      weight: 0.1
    },
    {
      name: TITLE,
      weight: 4
    }
  ],
  includeMatches: true,
  useExtendedSearch: true,
  ignoreLocation: true,
  threshhold: 0.4,
})

const RESULTS_MAX = 5

const searchBar = document.getElementById('search')
const resultsDiv = document.getElementById('results')

var results = []

function updateResultsWithTimeout() {
  console.log("clearing timeout")
  if (SEARCH_TIMEOUT_ID) SEARCH_TIMEOUT_ID = clearTimeout(SEARCH_TIMEOUT_ID)
  SEARCH_TIMEOUT_ID = setTimeout(updateResults, SEARCH_TIMEOUT_MS)
}

function updateResults() {
  console.log("updating results")
  resultsDiv.innerHTML = ''
  results = fuse.search(searchBar.value, { limit: RESULTS_MAX })
  results.forEach(r => {
    wrapper = document.createElement('div')
    wrapper.className = "article"

    display_matches = {}
    display_matches[HEADERS] = []
    display_matches[PATH] = []
    display_matches[TAGS] = []
    display_matches[TITLE] = []

    r.matches.every(match => {
      if (display_matches[match.key].length > 3) {
        display_matches[match.key].push('...')
        return false
      }

      display_match = match.value
      if (match.indices.length >= 1) {
        match.indices.sort((a, b) => (b[1]-b[0])-(a[1]-a[0]))
        indexPair = match.indices[0]
        matching_slice = match.value.slice(indexPair[0], indexPair[1]+1)
        display_match = match.value.replace(
          matching_slice,
          '<span class="matchHighlight">' + matching_slice + '</span>'
        )
      }
      display_matches[match.key].push(display_match)

      return true
    })

    content = document.createElement('a')
    content.innerHTML = r.item.title
    content.href = r.item.path

    wrapper.appendChild(content)

    Object.keys(display_matches).forEach(key => {
      if (display_matches[key].length < 1) return

      p = document.createElement('p')
      p.className = "smallText"
      p.innerHTML += key + ": [" + display_matches[key].join(', ') + ']'
      wrapper.appendChild(p)
    })

    resultsDiv.appendChild(wrapper)
  })
}

searchBar.addEventListener('keyup', e => {
  console.log(e)
  // if user pressed enter
  if (e.keyCode === 13) {
    if (e.shiftKey) {
      window.open(results[0].item.path, '_blank')
    } else {
    window.location.href = results[0].item.path
    }
    return
  }
  updateResultsWithTimeout()
})

searchBar.addEventListener('change', updateResultsWithTimeout)

const searchParams = new URL(window.location.href).searchParams;
searchBar.value = searchParams.get('q');
updateResults();

console.log(results)

if (searchParams.has('lucky')) {
  window.location.href = results[0].item.path;
}