/**
 * Remote registry browser RPC — catalog, tags, manifests, delete.
 */
import * as validation from '../utils/validation.js'
import {
  fetchCatalog,
  fetchTags,
  fetchManifest,
  deleteManifest,
  enrichTagsWithDigests,
  normalizeRegistryEndpoint,
} from '../services/registry-client.js'
import { resolveRegistryAuth } from './vault.js'

/**
 * Resolve auth + server address for browser ops.
 * @param {import('../rpc/session.js').PeerSession} session
 * @param {object} args
 */
function resolveBrowserAuth(session, args = {}) {
  const auth = resolveRegistryAuth(session, {
    credentialId: args.credentialId,
    auth: args.auth,
    autoVault: args.autoVault !== false,
    image: args.repository
      ? `${args.serveraddress || 'docker.io'}/${args.repository}`
      : args.image,
  })
  const serveraddress =
    args.serveraddress ||
    auth?.serveraddress ||
    'https://index.docker.io/v1/'
  return {
    auth: auth
      ? { username: auth.username, password: auth.password }
      : null,
    serveraddress: validation.sanitizeString(serveraddress, 512),
  }
}

/**
 * @param {import('../rpc/session.js').PeerSession} session
 */
export function registerRegistryHandlers(session) {
  session.respond('registryCatalog', async (args = {}) => {
    const { auth, serveraddress } = resolveBrowserAuth(session, args)
    const result = await fetchCatalog(serveraddress, auth, {
      n: args.n,
      last: args.last,
    })
    return {
      success: true,
      type: 'registryCatalog',
      serveraddress: result.endpoint.serveraddress,
      host: result.endpoint.host,
      isDockerHub: result.endpoint.isDockerHub,
      repositories: result.repositories,
      supported: result.supported,
      error: result.error,
      nextLast: result.nextLast,
    }
  })

  session.respond('registryListTags', async (args = {}) => {
    const repository = validation.sanitizeString(args.repository || args.name || '', 512)
    if (!repository) throw new Error('repository required')
    const { auth, serveraddress } = resolveBrowserAuth(session, {
      ...args,
      repository,
    })
    const result = await fetchTags(repository, serveraddress, auth)
    let tagsDetail = null
    if (args.enrich && result.tags.length) {
      tagsDetail = await enrichTagsWithDigests(
        result.repository,
        result.tags,
        serveraddress,
        auth,
        { limit: args.enrichLimit || 40 }
      )
    }
    return {
      success: true,
      type: 'registryTags',
      serveraddress: result.endpoint.serveraddress,
      host: result.endpoint.host,
      repository: result.repository,
      tags: result.tags,
      tagsDetail,
      tagCount: result.tags.length,
    }
  })

  session.respond('registryGetManifest', async (args = {}) => {
    const repository = validation.sanitizeString(args.repository || args.name || '', 512)
    const reference = validation.sanitizeString(
      args.reference || args.tag || args.digest || '',
      256
    )
    if (!repository || !reference) throw new Error('repository and reference required')
    const { auth, serveraddress } = resolveBrowserAuth(session, {
      ...args,
      repository,
    })
    const result = await fetchManifest(repository, reference, serveraddress, auth)
    // Don't ship full layer blobs — trim manifest for UI
    let manifestSummary = result.manifest
    if (manifestSummary && typeof manifestSummary === 'object') {
      manifestSummary = {
        schemaVersion: manifestSummary.schemaVersion,
        mediaType: manifestSummary.mediaType,
        architecture: manifestSummary.architecture,
        os: manifestSummary.os,
        config: manifestSummary.config
          ? { digest: manifestSummary.config.digest, size: manifestSummary.config.size, mediaType: manifestSummary.config.mediaType }
          : undefined,
        layers: Array.isArray(manifestSummary.layers)
          ? manifestSummary.layers.map((l) => ({
              digest: l.digest,
              size: l.size,
              mediaType: l.mediaType,
            }))
          : undefined,
        manifests: Array.isArray(manifestSummary.manifests)
          ? manifestSummary.manifests.map((m) => ({
              digest: m.digest,
              mediaType: m.mediaType,
              platform: m.platform,
              size: m.size,
            }))
          : undefined,
      }
    }
    return {
      success: true,
      type: 'registryManifest',
      serveraddress: result.endpoint.serveraddress,
      host: result.endpoint.host,
      repository: result.repository,
      reference: result.reference,
      digest: result.digest,
      mediaType: result.mediaType,
      sizeBytes: result.sizeBytes,
      platformCount: result.platformCount,
      architecture: result.architecture,
      os: result.os,
      childDigests: result.childDigests,
      manifest: manifestSummary,
    }
  })

  session.respond('registryDeleteTag', async (args = {}) => {
    const repository = validation.sanitizeString(args.repository || args.name || '', 512)
    const reference = validation.sanitizeString(
      args.reference || args.tag || args.digest || '',
      256
    )
    if (!repository || !reference) throw new Error('repository and reference required')
    const { auth, serveraddress } = resolveBrowserAuth(session, {
      ...args,
      repository,
    })
    if (!auth) {
      throw Object.assign(new Error('Authenticated credential required to delete remote tags'), {
        code: 'AUTH_REQUIRED',
      })
    }
    const result = await deleteManifest(repository, reference, serveraddress, auth)
    return {
      success: true,
      type: 'registryDelete',
      ...result,
      host: result.endpoint?.host,
      serveraddress: result.endpoint?.serveraddress,
    }
  })

  session.respond('registryDeleteTags', async (args = {}) => {
    const repository = validation.sanitizeString(args.repository || args.name || '', 512)
    const tags = Array.isArray(args.tags)
      ? args.tags.map((t) => String(t || '').trim()).filter(Boolean)
      : []
    if (!repository || !tags.length) throw new Error('repository and tags[] required')
    if (tags.length > 50) throw new Error('Max 50 tags per bulk delete')
    const { auth, serveraddress } = resolveBrowserAuth(session, {
      ...args,
      repository,
    })
    if (!auth) {
      throw Object.assign(new Error('Authenticated credential required to delete remote tags'), {
        code: 'AUTH_REQUIRED',
      })
    }
    /** @type {Array<object>} */
    const results = []
    for (const tag of tags) {
      try {
        const r = await deleteManifest(repository, tag, serveraddress, auth)
        results.push({ tag, ok: true, digest: r.digest, deleted: r.deleted })
      } catch (err) {
        results.push({ tag, ok: false, error: err.message })
      }
    }
    const deleted = results.filter((r) => r.ok && r.deleted).length
    return {
      success: true,
      type: 'registryBulkDelete',
      repository,
      deleted,
      failed: results.filter((r) => !r.ok).length,
      results,
    }
  })

  session.respond('registryNormalizeEndpoint', async (args = {}) => {
    const ep = normalizeRegistryEndpoint(args.serveraddress || args.server || '')
    return { success: true, type: 'registryEndpoint', ...ep }
  })
}