export const getProjectTypeForUrl = (type, categories) => {
  return getProjectTypeForUrlShorthand(type, categories)
}

export const getProjectTypeForUrlShorthand = (type, categories, overrideTags) => {
  const tags = overrideTags ?? useTags().value

  if (type === 'mod') {
    const isMod = categories.some((category) => {
      return tags.loaderData.modLoaders.includes(category)
    })

    const isPlugin = categories.some((category) => {
      return tags.loaderData.allPluginLoaders.includes(category)
    })

    const isDataPack = categories.some((category) => {
      return tags.loaderData.dataPackLoaders.includes(category)
    })

    if (isDataPack) {
      return 'datapack'
    } else if (isPlugin) {
      return 'plugin'
    } else if (isMod) {
      return 'mod'
    } else {
      return 'mod'
    }
  } else {
    return type
  }
}

export const getProjectLink = (project) => {
  return `/${getProjectTypeForUrl(project.project_type, project.loaders)}/${
    project.slug ? project.slug : project.id
  }`
}

export const getVersionLink = (project, version) => {
  if (version) {
    return getProjectLink(project) + '/version/' + version.id
  } else {
    return getProjectLink(project)
  }
}

export const isApproved = (project) => {
  return project && APPROVED_PROJECT_STATUSES.includes(project.status)
}

export const isListed = (project) => {
  return project && LISTED_PROJECT_STATUSES.includes(project.status)
}

export const isUnlisted = (project) => {
  return project && UNLISTED_PROJECT_STATUSES.includes(project.status)
}

export const isPrivate = (project) => {
  return project && PRIVATE_PROJECT_STATUSES.includes(project.status)
}

export const isRejected = (project) => {
  return project && REJECTED_PROJECT_STATUSES.includes(project.status)
}

export const isUnderReview = (project) => {
  return project && UNDER_REVIEW_PROJECT_STATUSES.includes(project.status)
}

export const isDraft = (project) => {
  return project && DRAFT_PROJECT_STATUSES.includes(project.status)
}

export const APPROVED_PROJECT_STATUSES = ['approved', 'archived', 'unlisted', 'private']
export const LISTED_PROJECT_STATUSES = ['approved', 'archived']
export const UNLISTED_PROJECT_STATUSES = ['unlisted', 'withheld']
export const PRIVATE_PROJECT_STATUSES = ['private', 'rejected', 'processing']
export const REJECTED_PROJECT_STATUSES = ['rejected', 'withheld']
export const UNDER_REVIEW_PROJECT_STATUSES = ['processing']
export const DRAFT_PROJECT_STATUSES = ['draft']

export function getVersionsToDisplay(project, overrideTags) {
  const tags = overrideTags ?? useTags().value

  const projectVersions = project.game_versions.slice()
  const allVersions = tags.gameVersions.slice()

  const allSnapshots = allVersions.filter((version) => version.version_type === 'snapshot')
  const allReleases = allVersions.filter((version) => version.version_type === 'release')
  const allLegacy = allVersions.filter(
    (version) => version.version_type !== 'snapshot' && version.version_type !== 'release'
  )

  {
    const indices = allVersions.reduce((map, gameVersion, index) => {
      map[gameVersion.version] = index
      return map
    }, {})
    projectVersions.sort((a, b) => indices[a] - indices[b])
  }

  const releaseVersions = projectVersions.filter((projVer) =>
    allReleases.some((gameVer) => gameVer.version === projVer)
  )

  const latestReleaseVersionDate = Date.parse(
    allReleases.find((version) => version.version === releaseVersions[0])?.date
  )
  const latestSnapshot = projectVersions.find((projVer) =>
    allSnapshots.some(
      (gameVer) =>
        gameVer.version === projVer &&
        (!latestReleaseVersionDate || latestReleaseVersionDate < Date.parse(gameVer.date))
    )
  )

  const allReleasesGrouped = groupVersions(
    allReleases.map((release) => release.version),
    false
  )
  const projectVersionsGrouped = groupVersions(releaseVersions, true)

  const releaseVersionsAsRanges = projectVersionsGrouped.map(({ major, minor }) => {
    if (minor.length === 1) {
      return formatVersion(major, minor[0])
    }

    if (
      allReleasesGrouped
        .find((x) => x.major === major)
        .minor.every((value, index) => value === minor[index])
    ) {
      return `${major}.x`
    }

    return `${formatVersion(major, minor[0])}–${formatVersion(major, minor[minor.length - 1])}`
  })

  const legacyVersionsAsRanges = groupConsecutiveIndices(
    projectVersions.filter((projVer) => allLegacy.some((gameVer) => gameVer.version === projVer)),
    allLegacy
  )

  let output = [...legacyVersionsAsRanges]

  // show all snapshots if there's no release versions
  if (releaseVersionsAsRanges.length === 0) {
    const snapshotVersionsAsRanges = groupConsecutiveIndices(
      projectVersions.filter((projVer) =>
        allSnapshots.some((gameVer) => gameVer.version === projVer)
      ),
      allSnapshots
    )
    output = [...snapshotVersionsAsRanges, ...output]
  } else {
    output = [...releaseVersionsAsRanges, ...output]
  }

  if (latestSnapshot) {
    output = [latestSnapshot, ...output]
  }
  return output
}

const mcVersionRegex = /^([0-9]+.[0-9]+)(.[0-9]+)?$/

function groupVersions(versions, consecutive = false) {
  return versions
    .slice()
    .reverse()
    .reduce((ranges, version) => {
      const matchesVersion = version.match(mcVersionRegex)

      if (matchesVersion) {
        const majorVersion = matchesVersion[1]
        const minorVersion = matchesVersion[2]
        const minorNumeric = minorVersion ? parseInt(minorVersion.replace('.', '')) : 0

        let prevInRange
        if (
          (prevInRange = ranges.find(
            (x) => x.major === majorVersion && (!consecutive || x.minor.at(-1) === minorNumeric - 1)
          ))
        ) {
          prevInRange.minor.push(minorNumeric)
          return ranges
        }

        return [...ranges, { major: majorVersion, minor: [minorNumeric] }]
      }

      return ranges
    }, [])
    .reverse()
}

function groupConsecutiveIndices(versions, referenceList) {
  if (!versions || versions.length === 0) {
    return []
  }

  const referenceMap = new Map()
  referenceList.forEach((item, index) => {
    referenceMap.set(item.version, index)
  })

  const sortedList = versions.slice().sort((a, b) => referenceMap.get(a) - referenceMap.get(b))

  const ranges = []
  let start = sortedList[0]
  let previous = sortedList[0]

  for (let i = 1; i < sortedList.length; i++) {
    const current = sortedList[i]
    if (referenceMap.get(current) !== referenceMap.get(previous) + 1) {
      ranges.push(validateRange(`${previous}–${start}`))
      start = current
    }
    previous = current
  }

  ranges.push(validateRange(`${previous}–${start}`))

  return ranges
}

function validateRange(range) {
  switch (range) {
    case 'rd-132211–b1.8.1':
      return 'All legacy versions'
    case 'a1.0.4–b1.8.1':
      return 'All alpha and beta versions'
    case 'a1.0.4–a1.2.6':
      return 'All alpha versions'
    case 'b1.0–b1.8.1':
      return 'All beta versions'
    case 'rd-132211–inf20100618':
      return 'All pre-alpha versions'
  }
  const splitRange = range.split('–')
  if (splitRange && splitRange[0] === splitRange[1]) {
    return splitRange[0]
  }
  return range
}

function formatVersion(major, minor) {
  return minor === 0 ? major : `${major}.${minor}`
}