import { exec, execSync } from "child_process";
import fs from "fs";
import path from "path";
import Redis from "ioredis";
import { WARCParser } from "warcio";
import { sleep } from "./utils";

let redisId: NonSharedBuffer;
let numResponses = 0;

let sizeSaved = 0;

beforeAll(() => {
  execSync("docker network create dedupe");

  redisId = execSync(
    "docker run --rm --network=dedupe -p 37379:6379 --name dedupe-redis -d redis",
  );
});

afterAll(async () => {
  execSync(`docker kill ${redisId}`);

  await sleep(3000);

  execSync("docker network rm dedupe");
});

function runCrawl(name: string, { db = 0, limit = 4, wacz = true } = {}) {
  fs.rmSync(`./test-crawls/collections/${name}`, {
    recursive: true,
    force: true,
  });

  const crawler = exec(
    `docker run -v $PWD/test-crawls:/crawls --network=dedupe -e CRAWL_ID=${name} webrecorder/browsertrix-crawler crawl --url https://old.webrecorder.net/ --limit ${limit} --exclude community --collection ${name} --redisDedupeUrl redis://dedupe-redis:6379/${db} ${
      wacz ? "--generateWACZ" : ""
    }`,
  );

  return new Promise((resolve) => {
    crawler.on("exit", (code) => {
      resolve(code);
    });
  });
}

function loadFirstWARC(name: string) {
  const archiveWarcLists = fs.readdirSync(
    `test-crawls/collections/${name}/archive`,
  );

  const warcName = path.join(
    `test-crawls/collections/${name}/archive`,
    archiveWarcLists[0],
  );

  const nodeStream = fs.createReadStream(warcName);

  const parser = new WARCParser(nodeStream);

  return parser;
}

function deleteFirstWARC(name: string) {
  const archiveWarcLists = fs.readdirSync(
    `test-crawls/collections/${name}/archive`,
  );

  const warcName = path.join(
    `test-crawls/collections/${name}/archive`,
    archiveWarcLists[0],
  );

  fs.unlinkSync(warcName);
}

function loadDataPackageRelated(name: string) {
  execSync(
    `unzip test-crawls/collections/${name}/${name}.wacz -d test-crawls/collections/${name}/wacz`,
  );

  const data = fs.readFileSync(
    `test-crawls/collections/${name}/wacz/datapackage.json`,
    "utf8",
  );
  const dataPackageJSON = JSON.parse(data);
  return dataPackageJSON.relation;
}

async function redisGetHash(key: string, db = 0) {
  const redis = new Redis(`redis://127.0.0.1:37379/${db}`, {
    lazyConnect: true,
    retryStrategy: () => null,
  });

  redis.options.maxRetriesPerRequest = 50;

  await redis.connect();

  return await redis.hgetall(key);
}

async function checkSizeStats(
  numUniq: number,
  key: string,
  db: number,
  minSize: number,
) {
  const result = await redisGetHash(key, db);
  console.log(result);
  expect(numUniq).toBeLessThan(Number(result.totalUrls));

  const conservedSize = Number(result.conservedSize);
  expect(conservedSize).toBeGreaterThan(minSize);
  return conservedSize;
}

test("check revisit records written on duplicate crawl, same collection, no wacz", async () => {
  const collName = "dedupe-test-same-coll";

  expect(await runCrawl(collName, { limit: 1, wacz: false })).toBe(0);

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const statusCode = -1;

  let response = 0;
  let revisit = 0;

  const parserOrig = loadFirstWARC(collName);

  for await (const record of parserOrig) {
    if (record.warcTargetURI && record.warcTargetURI.startsWith("urn:")) {
      continue;
    }

    if (record.warcType === "response") {
      response++;
    }
  }

  deleteFirstWARC(collName);

  expect(await runCrawl(collName, { limit: 1, wacz: false })).toBe(0);

  const dupeOrig = loadFirstWARC(collName);

  for await (const record of dupeOrig) {
    if (record.warcTargetURI && record.warcTargetURI.startsWith("urn:")) {
      continue;
    }

    if (record.warcType === "revisit") {
      revisit++;
    }
  }

  expect(response).toBeGreaterThan(0);

  // revisits should match number of responses for non urn:
  expect(response).toBe(revisit);

  numResponses = response;

  await checkSizeStats(numResponses, "allcounts", 0, 77000);
});

test("dedupe same collection, with wacz, no external waczs referenced", async () => {
  const collName = "dedupe-test-same-coll";

  expect(await runCrawl(collName, { limit: 1, wacz: true })).toBe(0);

  const related = loadDataPackageRelated(collName);

  expect(related).toBe(undefined);
});

test("check revisit records written on duplicate crawl, different collections, with wacz", async () => {
  expect(await runCrawl("dedupe-test-orig", { db: 1 })).toBe(0);
  expect(await runCrawl("dedupe-test-dupe", { db: 1 })).toBe(0);

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const statusCode = -1;

  let response = 0;
  let revisit = 0;

  const parserOrig = loadFirstWARC("dedupe-test-orig");

  for await (const record of parserOrig) {
    if (record.warcTargetURI && record.warcTargetURI.startsWith("urn:")) {
      continue;
    }

    if (record.warcType === "response") {
      response++;
    }
  }

  const dupeOrig = loadFirstWARC("dedupe-test-dupe");

  for await (const record of dupeOrig) {
    if (record.warcTargetURI && record.warcTargetURI.startsWith("urn:")) {
      continue;
    }

    if (record.warcType === "revisit") {
      revisit++;
      expect(record.warcHeader("WARC-Refers-To-Container")).toBe(
        "file://dedupe-test-orig.wacz",
      );
    }
  }

  expect(response).toBeGreaterThan(0);

  // revisits should match number of responses for non urn:
  expect(response).toBe(revisit);

  numResponses = response;

  sizeSaved = await checkSizeStats(numResponses, "allcounts", 1, 48400000);
});

test("import dupe index, orig then revisits, from single wacz", async () => {
  execSync(
    `docker run -v $PWD/test-crawls:/crawls --network=dedupe webrecorder/browsertrix-crawler indexer --sourceUrl /crawls/collections/dedupe-test-orig/dedupe-test-orig.wacz --sourceCrawlId dedupe-test-orig --redisDedupeUrl redis://dedupe-redis:6379/2`,
  );

  const redis = new Redis("redis://127.0.0.1:37379/2", {
    lazyConnect: true,
    retryStrategy: () => null,
  });

  redis.options.maxRetriesPerRequest = 50;

  await redis.connect();
});

test("verify new crawl against imported dupe index has same dupes as dedupe against original", async () => {
  expect(await runCrawl("dedupe-test-dupe-2", { db: 2 })).toBe(0);

  const dupeOrig = loadFirstWARC("dedupe-test-dupe-2");

  let revisit = 0;

  for await (const record of dupeOrig) {
    if (record.warcTargetURI && record.warcTargetURI.startsWith("urn:")) {
      continue;
    }

    if (record.warcType === "revisit") {
      revisit++;
      expect(record.warcHeader("WARC-Refers-To-Container")).toBe(
        "file://dedupe-test-orig.wacz",
      );
    }
  }

  // matches same number of revisits as original
  expect(revisit).toBe(numResponses);

  await checkSizeStats(numResponses, "allcounts", 2, 48400000);
});

test("import dupe index from json, reverse, revisits than orig, from wacz", async () => {
  const importJson = {
    resources: [
      {
        name: "dedupe-test-dupe",
        path: "/crawls/collections/dedupe-test-dupe/dedupe-test-dupe.wacz",
        crawlId: "dedupe-test-dupe",
      },
      {
        name: "invalid-file",
        path: "/crawls/invalid-file",
        crawlId: "dedupe-test-dupe",
      },
      {
        name: "dedupe-test-orig",
        path: "/crawls/collections/dedupe-test-orig/dedupe-test-orig.wacz",
        crawlId: "dedupe-test-orig",
      },
    ],
  };

  fs.writeFileSync(
    "./test-crawls/collections/dedupe-test-dupe/import-1.json",
    JSON.stringify(importJson),
    "utf-8",
  );

  execSync(
    `docker run -v $PWD/test-crawls:/crawls --network=dedupe webrecorder/browsertrix-crawler indexer --sourceUrl /crawls/collections/dedupe-test-dupe/import-1.json --redisDedupeUrl redis://dedupe-redis:6379/3`,
  );

  const redis = new Redis("redis://127.0.0.1:37379/3", {
    lazyConnect: true,
    retryStrategy: () => null,
  });

  redis.options.maxRetriesPerRequest = 50;

  await redis.connect();

  expect(await redis.hlen("alldupes")).toBe(numResponses);

  const sizeSavedImport = await checkSizeStats(
    numResponses,
    "allcounts",
    3,
    48400000,
  );

  expect(sizeSavedImport).toBe(sizeSaved);
});

test("test requires in datapackage.json of wacz deduped against previous crawl", () => {
  const res1 = loadDataPackageRelated("dedupe-test-dupe");

  expect(res1.requires.length).toBe(1);
  const entry = res1.requires[0];
  expect(entry.crawlId).toBe("dedupe-test-orig");
  expect(entry.filename).toBe("dedupe-test-orig.wacz");
  expect(entry.size).toBeDefined();
  expect(entry.hash).toBeDefined();
});

test("test requires in datapackage.json of wacz deduped against import from wacz", () => {
  const res2 = loadDataPackageRelated("dedupe-test-dupe-2");
  expect(res2.requires.length).toBe(1);
  const entry2 = res2.requires[0];
  expect(entry2.crawlId).toBe("dedupe-test-orig");
  expect(entry2.filename).toBe("dedupe-test-orig.wacz");
  // undefined as importing from single WACZ and not computing
  expect(entry2.size).toBeUndefined();
  expect(entry2.hash).toBeUndefined();
});