import { createContext, useContext } from 'react'

import type { BreadcrumbT } from 'components/Breadcrumbs'

type ProductT = {
  external: boolean
  href: string
  id: string
  name: string
}

type LanguageItem = {
  name: string
  nativeName: string
  code: string
  hreflang: string
  wip?: boolean
}

type VersionItem = {
  version: string
  versionTitle: string
}

type DataT = {
  ui: Record<string, any>
  reusables: {
    enterprise_deprecation: {
      version_was_deprecated: string
      version_will_be_deprecated: string
      deprecation_details: string
      isOldestReleaseDeprecated: boolean
    }
    policies: {
      translation: string
    }
  }
  variables: {
    release_candidate: { version: string }
  }
}
type EnterpriseServerReleases = {
  isOldestReleaseDeprecated: boolean
  oldestSupported: string
  nextDeprecationDate: string
}
export type MainContextT = {
  breadcrumbs: Record<string, BreadcrumbT>
  builtAssets: { main: { css: string; js: string } }
  expose: string
  activeProducts: Array<ProductT>
  currentProduct: ProductT
  currentLayoutName: string
  data: DataT
  airGap?: boolean
  error: string
  currentCategory?: string
  relativePath?: string
  enterpriseServerReleases: EnterpriseServerReleases
  currentLanguage: string
  languages: Record<string, LanguageItem>
  allVersions: Record<string, VersionItem>
}

export const getMainContextFromRequest = (req: any): MainContextT => {
  return {
    builtAssets: req.context.builtAssets,
    expose: req.context.expose,
    breadcrumbs: req.context.breadcrumbs || {},
    activeProducts: req.context.activeProducts,
    currentProduct: req.context.productMap[req.context.currentProduct],
    currentLayoutName: req.context.currentLayoutName,
    error: req.context.error || '',
    data: {
      ui: req.context.site.data.ui,
      reusables: {
        enterprise_deprecation: req.context.site.data.reusables.enterprise_deprecation,
        policies: req.context.site.data.reusables.policies,
      },
      variables: {
        release_candidate: req.context.site.data.variables.release_candidate,
      },
    },
    airGap: req.context.AIRGAP || false,
    currentCategory: req.context.currentCategory || '',
    relativePath: req.context.page.relativePath,
    enterpriseServerReleases: req.context.enterpriseServerReleases,
    currentLanguage: req.context.currentLanguage,
    languages: Object.fromEntries(
      Object.entries(req.context.languages).map(([key, entry]: any) => {
        return [
          key,
          {
            name: entry.name,
            nativeName: entry.nativeName || '',
            code: entry.code,
            hreflang: entry.hreflang,
          },
        ]
      })
    ),
    allVersions: req.context.allVersions,
  }
}

export const MainContext = createContext<MainContextT | null>(null)

export const useMainContext = (): MainContextT => {
  const context = useContext(MainContext)

  if (!context) {
    throw new Error('"useMainContext" may only be used inside "MainContext.Provider"')
  }

  return context
}