/**
 * Core plugin is a special plugin because of historical reasons.
 * It is used by templates to setup global configuration.
 */

//Setup
export default async function({login, q}, {conf, data, rest, graphql, plugins, queries, account, convert, template}, {pending, imports}) {
  //Load inputs
  const {"config.animations":animations, "config.display":display, "config.timezone":_timezone, "debug.flags":dflags} = imports.metadata.plugins.core.inputs({data, account, q})
  imports.metadata.templates[template].check({q, account, format:convert})

  //Init
  const computed = {commits:0, sponsorships:0, licenses:{favorite:"", used:{}, about:{}}, token:{}, repositories:{watchers:0, stargazers:0, issues_open:0, issues_closed:0, pr_open:0, pr_closed:0, pr_merged:0, forks:0, forked:0, releases:0, deployments:0, environments:0}}
  const avatar = imports.imgb64(data.user.avatarUrl)
  data.computed = computed
  console.debug(`metrics/compute/${login} > formatting common metrics`)

  //Timezone config
  const offset = Number(new Date().toLocaleString("fr", {timeZoneName:"short"}).match(/UTC[+](?<offset>\d+)/)?.groups?.offset * 60 * 60 * 1000) || 0
  if (_timezone) {
    const timezone = {name:_timezone, offset:0}
    data.config.timezone = timezone
    try {
      timezone.offset = offset - (Number(new Date().toLocaleString("fr", {timeZoneName:"short", timeZone:timezone.name}).match(/UTC[+](?<offset>\d+)/)?.groups?.offset * 60 * 60 * 1000) || 0)
      console.debug(`metrics/compute/${login} > timezone set to ${timezone.name} (${timezone.offset > 0 ? "+" : ""}${Math.round(timezone.offset / (60 * 60 * 1000))} hours)`)
    }
    catch {
      timezone.error = `Failed to use timezone "${timezone.name}"`
      console.debug(`metrics/compute/${login} > failed to use timezone "${timezone.name}"`)
    }
  }
  else if (process?.env?.TZ)
    data.config.timezone = {name:process.env.TZ, offset}

  //Display
  data.large = display === "large"
  data.columns = display === "columns"

  //Animations
  data.animated = animations
  console.debug(`metrics/compute/${login} > animations ${data.animated ? "enabled" : "disabled"}`)

  //Plugins
  for (const name of Object.keys(imports.plugins)) {
    if ((!plugins[name]?.enabled) || (!q[name]))
      continue
    pending.push((async () => {
      try {
        console.debug(`metrics/compute/${login}/plugins > ${name} > started`)
        data.plugins[name] = await imports.plugins[name]({login, q, imports, data, computed, rest, graphql, queries, account}, {...plugins[name], extras:conf.settings?.extras?.features ?? conf.settings?.extras?.default ?? false})
        console.debug(`metrics/compute/${login}/plugins > ${name} > completed`)
      }
      catch (error) {
        console.debug(`metrics/compute/${login}/plugins > ${name} > completed (error)`)
        data.plugins[name] = error
      }
      finally {
        const result = {name, result:data.plugins[name]}
        console.debug(imports.util.inspect(result, {depth:Infinity, maxStringLength:256}))
        return result
      }
    })())
  }

  //Iterate through user's repositories
  for (const repository of data.user.repositories.nodes) {
    //Simple properties with totalCount
    for (const property of ["watchers", "stargazers", "issues_open", "issues_closed", "pr_open", "pr_closed", "pr_merged", "releases", "deployments", "environments"])
      computed.repositories[property] += repository[property]?.totalCount ?? 0
    //Forks
    computed.repositories.forks += repository.forkCount
    if (repository.isFork)
      computed.repositories.forked++
    //License
    if (repository.licenseInfo) {
      computed.licenses.used[repository.licenseInfo.spdxId] = (computed.licenses.used[repository.licenseInfo.spdxId] ?? 0) + 1
      computed.licenses.about[repository.licenseInfo.spdxId] = repository.licenseInfo
    }
  }

  //Total disk usage
  computed.diskUsage = `${imports.format.bytes(data.user.repositories.totalDiskUsage * 1000)}`

  //Compute licenses stats
  computed.licenses.favorite = Object.entries(computed.licenses.used).sort(([_an, a], [_bn, b]) => b - a).slice(0, 1).map(([name, _value]) => name) ?? ""

  //Compute total commits
  computed.commits += data.user.contributionsCollection.totalCommitContributions + data.user.contributionsCollection.restrictedContributionsCount

  //Compute registration date
  const diff = (Date.now() - (new Date(data.user.createdAt)).getTime()) / (365 * 24 * 60 * 60 * 1000)
  const years = Math.floor(diff)
  const months = Math.floor((diff - years) * 12)
  computed.registered = {years, months, diff}
  computed.registration = years ? `${years} year${imports.s(years)} ago` : months ? `${months} month${imports.s(months)} ago` : `${Math.ceil(diff * 365)} day${imports.s(Math.ceil(diff * 365))} ago`
  computed.cakeday = years > 1 ? [new Date(), new Date(data.user.createdAt)].map(date => date.toISOString().match(/(?<mmdd>\d{2}-\d{2})(?=T)/)?.groups?.mmdd).every((v, _, a) => v === a[0]) : false

  //Compute calendar
  computed.calendar = data.user.calendar.contributionCalendar.weeks.flatMap(({contributionDays}) => contributionDays).slice(0, 14).reverse()

  //Avatar (base64)
  computed.avatar = await avatar || "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg=="

  //Token scopes
  try {
    computed.token.scopes = conf.settings.notoken ? [] : (await rest.request("HEAD /")).headers["x-oauth-scopes"].split(", ")
  }
  catch (error) {
    console.debug(error)
    computed.token.scopes = []
  }

  //Meta
  data.meta = {
    version:conf.package.version,
    author:conf.package.author,
    generated:imports.format.date(new Date(), {dateStyle:"short", timeStyle:"short"})
  }

  //Debug flags
  if (dflags.includes("--cakeday")) {
    console.debug(`metrics/compute/${login} > applying dflag --cakeday`)
    computed.cakeday = true
  }
  if (dflags.includes("--hireable")) {
    console.debug(`metrics/compute/${login} > applying dflag --hireable`)
    data.user.isHireable = true
  }
  if (dflags.includes("--halloween")) {
    console.debug(`metrics/compute/${login} > applying dflag --halloween`)
    //Haloween color replacer
    const halloween = content => content
        .replace(/--color-calendar-graph/g, "--color-calendar-halloween-graph")
        .replace(/#9be9a8/gi, "var(--color-calendar-halloween-graph-day-L1-bg)")
        .replace(/#40c463/gi, "var(--color-calendar-halloween-graph-day-L2-bg)")
        .replace(/#30a14e/gi, "var(--color-calendar-halloween-graph-day-L3-bg)")
        .replace(/#216e39/gi, "var(--color-calendar-halloween-graph-day-L4-bg)")
    //Update contribution calendar colors
    computed.calendar.map(day => day.color = halloween(day.color))
    //Update isocalendar colors
    const waiting = [...pending]
    pending.push((async () => {
      await Promise.all(waiting)
      if (data.plugins.isocalendar?.svg)
        data.plugins.isocalendar.svg = halloween(data.plugins.isocalendar.svg)
      return {name:"dflag.halloween", result:true}
    })())
  }
  if (dflags.includes("--error")) {
    console.debug(`metrics/compute/${login} > applying dflag --error`)
    throw new Error("Failed as requested by --error flag")
  }

  //Results
  return null
}