import path from 'node:path'

import {
  cacheDelete,
  cacheList,
  cacheListRegistries,
  cacheView,
} from '@pnpm/cache.api'
import { docsUrl } from '@pnpm/cli.utils'
import { type Config, type ConfigContext, types as allTypes } from '@pnpm/config.reader'
import { ABBREVIATED_META_DIR, FULL_FILTERED_META_DIR } from '@pnpm/constants'
import { PnpmError } from '@pnpm/error'
import { getStorePath } from '@pnpm/store.path'
import { pick } from 'ramda'
import { renderHelp } from 'render-help'

export const rcOptionsTypes = cliOptionsTypes

export function cliOptionsTypes (): Record<string, unknown> {
  return {
    ...pick([
      'registry',
      'store-dir',
    ], allTypes),
  }
}

export const commandNames = ['cache']

export function help (): string {
  return renderHelp({
    description: 'Inspect and manage the metadata cache',
    descriptionLists: [
      {
        title: 'Commands',

        list: [
          {
            description: 'Lists the available packages metadata cache. Supports filtering by glob',
            name: 'list',
          },
          {
            description: 'Lists all registries that have their metadata cache locally',
            name: 'list-registries',
          },
          {
            description: "Views information from the specified package's cache",
            name: 'view',
          },
          {
            description: 'Deletes metadata cache for the specified package(s). Supports patterns',
            name: 'delete',
          },
        ],
      },
    ],
    url: docsUrl('cache'),
    usages: ['pnpm cache <command>'],
  })
}

export type CacheCommandOptions = Pick<Config, 'cacheDir' | 'storeDir' | 'pnpmHomeDir' | 'resolutionMode' | 'registrySupportsTimeField'> & Pick<ConfigContext, 'cliOptions'>

export async function handler (opts: CacheCommandOptions, params: string[]): Promise<string | undefined> {
  const cacheType = (opts.resolutionMode === 'time-based' && !opts.registrySupportsTimeField)
    ? FULL_FILTERED_META_DIR
    : ABBREVIATED_META_DIR
  const cacheDir = path.join(opts.cacheDir, cacheType)
  switch (params[0]) {
    case 'list-registries':
      return cacheListRegistries({
        ...opts,
        cacheDir,
      })
    case 'list':
      return cacheList({
        ...opts,
        cacheDir,
        registry: opts.cliOptions['registry'],
      }, params.slice(1))
    case 'delete':
      return cacheDelete({
        ...opts,
        cacheDir,
        registry: opts.cliOptions['registry'],
      }, params.slice(1))
    case 'view': {
      if (!params[1]) {
        throw new PnpmError('MISSING_PACKAGE_NAME', '`pnpm cache view` requires the package name')
      }
      if (params.length > 2) {
        throw new PnpmError('TOO_MANY_PARAMS', '`pnpm cache view` only accepts one package name')
      }
      const storeDir = await getStorePath({
        pkgRoot: process.cwd(),
        storePath: opts.storeDir,
        pnpmHomeDir: opts.pnpmHomeDir,
      })
      return cacheView({
        ...opts,
        cacheDir,
        storeDir,
        registry: opts.cliOptions['registry'],
      }, params[1])
    }
    default:
      return help()
  }
}