import util from 'node:util'
import assert from 'node:assert'
import { AtpAgent } from '@atproto/api'
import { request } from 'undici'
import { TestNetwork, SeedClient, RecordRef } from '@atproto/dev-env'
import basicSeed from '../seeds/basic'
import { ThreadViewPost } from '../../src/lexicon/types/app/bsky/feed/defs'
import { View as RecordEmbedView } from '../../src/lexicon/types/app/bsky/embed/record'
import { View as ExternalEmbedView } from '../../src/lexicon/types/app/bsky/embed/external'
import { View as ImagesEmbedView } from '../../src/lexicon/types/app/bsky/embed/images'

describe('proxy read after write', () => {
  let network: TestNetwork
  let agent: AtpAgent
  let sc: SeedClient

  let alice: string
  let carol: string

  beforeAll(async () => {
    network = await TestNetwork.create({
      dbPostgresSchema: 'proxy_read_after_write',
    })
    agent = network.pds.getClient()
    sc = network.getSeedClient()
    await basicSeed(sc, { addModLabels: network.bsky })
    await network.processAll()
    alice = sc.dids.alice
    carol = sc.dids.carol
    await network.bsky.sub.destroy()
  })

  afterAll(async () => {
    await network.close()
  })

  it('handles read after write on profiles', async () => {
    await sc.updateProfile(alice, { displayName: 'blah' })
    const res = await agent.api.app.bsky.actor.getProfile(
      { actor: alice },
      { headers: { ...sc.getHeaders(alice) } },
    )
    expect(res.data.displayName).toEqual('blah')
    expect(res.data.description).toBeUndefined()
  })

  it('handles image formatting', async () => {
    assert(network.pds.ctx.cfg.bskyAppView)
    const blob = await sc.uploadFile(
      alice,
      '../dev-env/assets/key-landscape-small.jpg',
      'image/jpeg',
    )
    await sc.updateProfile(alice, { displayName: 'blah', avatar: blob.image })

    const res = await agent.api.app.bsky.actor.getProfile(
      { actor: alice },
      { headers: { ...sc.getHeaders(alice) } },
    )
    expect(res.data.avatar).toEqual(
      util.format(
        network.pds.ctx.cfg.bskyAppView.cdnUrlPattern,
        'avatar',
        alice,
        blob.image.ref.toString(),
      ),
    )
  })

  it('handles read after write on getAuthorFeed', async () => {
    const res = await agent.api.app.bsky.feed.getAuthorFeed(
      { actor: alice },
      { headers: { ...sc.getHeaders(alice) } },
    )
    for (const item of res.data.feed) {
      if (item.post.author.did === alice) {
        expect(item.post.author.displayName).toEqual('blah')
      }
    }
  })

  let replyRef1: RecordRef
  let replyRef2: RecordRef

  it('handles read after write on threads', async () => {
    const reply1 = await sc.reply(
      alice,
      sc.posts[alice][0].ref,
      sc.posts[alice][0].ref,
      'another reply',
    )
    const reply2 = await sc.reply(
      alice,
      sc.posts[alice][0].ref,
      reply1.ref,
      'another another reply',
    )
    replyRef1 = reply1.ref
    replyRef2 = reply2.ref
    const res = await agent.api.app.bsky.feed.getPostThread(
      { uri: sc.posts[alice][0].ref.uriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    const thread = res.data.thread as ThreadViewPost
    const layerOne = thread.replies as ThreadViewPost[]
    expect(layerOne.length).toBe(1)
    expect(layerOne[0].post.uri).toEqual(reply1.ref.uriStr)
    const layerTwo = layerOne[0].replies as ThreadViewPost[]
    expect(layerTwo.length).toBe(1)
    expect(layerTwo[0].post.uri).toEqual(reply2.ref.uriStr)

    const aliceHandle = sc.accounts[alice].handle
    const handleUriStr = thread.post.uri.replace(alice, aliceHandle)
    expect(handleUriStr).not.toEqual(thread.post.uri)
    const handleRes = await agent.api.app.bsky.feed.getPostThread(
      { uri: handleUriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    expect(handleRes.data.thread).toEqual(res.data.thread)
  })

  it('handles read after write on a thread that is not found on appview', async () => {
    const res = await agent.api.app.bsky.feed.getPostThread(
      { uri: replyRef1.uriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    const thread = res.data.thread as ThreadViewPost
    expect(thread.post.uri).toEqual(replyRef1.uriStr)
    expect((thread.parent as ThreadViewPost).post.uri).toEqual(
      sc.posts[alice][0].ref.uriStr,
    )
    expect(thread.replies?.length).toEqual(1)
    expect((thread.replies?.at(0) as ThreadViewPost).post.uri).toEqual(
      replyRef2.uriStr,
    )

    const aliceHandle = sc.accounts[alice].handle
    const handleUriStr = thread.post.uri.replace(alice, aliceHandle)
    expect(handleUriStr).not.toEqual(thread.post.uri)
    const handleRes = await agent.api.app.bsky.feed.getPostThread(
      { uri: handleUriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    expect(handleRes.data.thread).toEqual(res.data.thread)
  })

  it('handles read after write on threads with record embeds', async () => {
    assert(network.pds.ctx.cfg.bskyAppView)
    const img = await sc.uploadFile(
      alice,
      '../dev-env/assets/key-landscape-small.jpg',
      'image/jpeg',
    )
    const replyRes1 = await agent.api.app.bsky.feed.post.create(
      { repo: alice },
      {
        text: 'images test',
        reply: {
          root: sc.posts[alice][2].ref.raw,
          parent: sc.posts[alice][2].ref.raw,
        },
        embed: {
          $type: 'app.bsky.embed.images',
          images: [
            {
              image: img.image,
              aspectRatio: { height: 2, width: 1 },
              alt: 'alt text',
            },
          ],
        },
        createdAt: new Date().toISOString(),
      },
      sc.getHeaders(alice),
    )
    const replyRes2 = await agent.api.app.bsky.feed.post.create(
      { repo: alice },
      {
        text: 'external test',
        reply: {
          root: sc.posts[alice][2].ref.raw,
          parent: {
            uri: replyRes1.uri,
            cid: replyRes1.cid,
          },
        },
        embed: {
          $type: 'app.bsky.embed.external',
          external: {
            uri: 'https://example.com',
            title: 'TestImage',
            description: 'testLink',
            thumb: img.image,
          },
        },
        createdAt: new Date().toISOString(),
      },
      sc.getHeaders(alice),
    )

    const res = await agent.api.app.bsky.feed.getPostThread(
      { uri: sc.posts[alice][2].ref.uriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    const replies = res.data.thread.replies as ThreadViewPost[]
    expect(replies.length).toBe(1)
    expect(replies[0].post.uri).toEqual(replyRes1.uri)
    const imgs = replies[0].post.embed as ImagesEmbedView
    expect(imgs.images[0].fullsize).toEqual(
      util.format(
        network.pds.ctx.cfg.bskyAppView.cdnUrlPattern,
        'feed_fullsize',
        alice,
        img.image.ref.toString(),
      ),
    )
    expect(imgs.images[0].aspectRatio).toEqual({ height: 2, width: 1 })
    expect(imgs.images[0].alt).toBe('alt text')
    expect(replies[0].replies?.length).toBe(1)
    // @ts-ignore
    expect(replies[0].replies[0].post.uri).toEqual(replyRes2.uri)
    // @ts-ignore
    const external = replies[0].replies[0].post.embed as ExternalEmbedView
    expect(external.external.title).toEqual('TestImage')
    expect(external.external.thumb).toEqual(
      util.format(
        network.pds.ctx.cfg.bskyAppView.cdnUrlPattern,
        'feed_thumbnail',
        alice,
        img.image.ref.toString(),
      ),
    )
  })

  it('handles read after write on threads with record embeds', async () => {
    const replyRes = await agent.api.app.bsky.feed.post.create(
      { repo: alice },
      {
        text: 'blah',
        reply: {
          root: sc.posts[carol][0].ref.raw,
          parent: sc.posts[carol][0].ref.raw,
        },
        embed: {
          $type: 'app.bsky.embed.record',
          record: sc.posts[alice][0].ref.raw,
        },
        createdAt: new Date().toISOString(),
      },
      sc.getHeaders(alice),
    )
    const res = await agent.api.app.bsky.feed.getPostThread(
      { uri: sc.posts[carol][0].ref.uriStr },
      { headers: { ...sc.getHeaders(alice) } },
    )
    const replies = res.data.thread.replies as ThreadViewPost[]
    expect(replies.length).toBe(1)
    expect(replies[0].post.uri).toEqual(replyRes.uri)
    const embed = replies[0].post.embed as RecordEmbedView
    expect(embed.record.uri).toEqual(sc.posts[alice][0].ref.uriStr)
  })

  it('handles read after write on getTimeline', async () => {
    const postRes = await agent.api.app.bsky.feed.post.create(
      { repo: alice },
      {
        text: 'poast',
        createdAt: new Date().toISOString(),
      },
      sc.getHeaders(alice),
    )
    const res = await agent.api.app.bsky.feed.getTimeline(
      {},
      { headers: { ...sc.getHeaders(alice) } },
    )
    expect(res.data.feed[0].post.uri).toEqual(postRes.uri)
  })

  it('returns lag headers', async () => {
    const res = await agent.api.app.bsky.feed.getTimeline(
      {},
      { headers: { ...sc.getHeaders(alice) } },
    )
    const lag = res.headers['atproto-upstream-lag']
    expect(lag).toBeDefined()
    const parsed = parseInt(lag)
    expect(parsed > 0).toBe(true)
  })

  it('negotiates encoding', async () => {
    const identity = await agent.api.app.bsky.feed.getTimeline(
      {},
      { headers: { ...sc.getHeaders(alice), 'accept-encoding': 'identity' } },
    )
    expect(identity.headers['content-encoding']).toBeUndefined()

    const gzip = await agent.api.app.bsky.feed.getTimeline(
      {},
      {
        headers: { ...sc.getHeaders(alice), 'accept-encoding': 'gzip, *;q=0' },
      },
    )
    expect(gzip.headers['content-encoding']).toBe('gzip')
  })

  it('defaults to identity encoding', async () => {
    // Not using the "agent" because "fetch()" will add "accept-encoding: gzip,
    // deflate" if not "accept-encoding" header is provided
    const res = await request(
      new URL(`/xrpc/app.bsky.feed.getTimeline`, agent.dispatchUrl),
      {
        headers: { ...sc.getHeaders(alice) },
      },
    )
    expect(res.statusCode).toBe(200)
    expect(res.headers['content-encoding']).toBeUndefined()
  })

  it('falls back to identity encoding', async () => {
    const invalid = await agent.api.app.bsky.feed.getTimeline(
      {},
      { headers: { ...sc.getHeaders(alice), 'accept-encoding': 'invalid' } },
    )

    expect(invalid.headers['content-encoding']).toBeUndefined()
  })

  it('errors when failing to negotiate encoding', async () => {
    await expect(
      agent.api.app.bsky.feed.getTimeline(
        {},
        {
          headers: {
            ...sc.getHeaders(alice),
            'accept-encoding': 'invalid, *;q=0',
          },
        },
      ),
    ).rejects.toThrow(
      expect.objectContaining({
        status: 406,
        message: 'this service does not support any of the requested encodings',
      }),
    )
  })

  it('errors on invalid content-encoding format', async () => {
    await expect(
      agent.api.app.bsky.feed.getTimeline(
        {},
        {
          headers: {
            ...sc.getHeaders(alice),
            'accept-encoding': ';q=1',
          },
        },
      ),
    ).rejects.toThrow(
      expect.objectContaining({
        status: 400,
        message: 'Invalid accept-encoding: ";q=1"',
      }),
    )
  })
})