/* tslint:disable:no-implicit-dependencies no-any */
/**
 * BarcodePicker tests
 */
import test from "ava";
import crypto from "crypto";
import fs from "fs";
import { Response } from "node-fetch";
import * as sinon from "sinon";
import { ImageSettings } from "../imageSettings";
import { Parser } from "../parser";
import { ScanSettings } from "../scanSettings";
import { engine, Engine, Module } from "./engineWorker";

declare interface MockModule extends Module {
  lengthBytesUTF8: sinon.SinonSpy<[any]>;
  UTF8ToString: sinon.SinonSpy<[any]>;
  stringToUTF8: sinon.SinonSpy<[any, any]>;
  _malloc: sinon.SinonSpy<[any]>;
  _free: sinon.SinonSpy;
  _create_context: sinon.SinonSpy;
  _scanner_settings_new_from_json: sinon.SinonSpy<[any]>;
  _scanner_image_settings_new: sinon.SinonSpy;
  _scanner_session_clear: sinon.SinonSpy;
  _can_hide_logo: sinon.SinonSpy<any>;
  _scanner_scan: sinon.SinonSpy<[any]>;
  _parser_parse_string: sinon.SinonSpy<[any]>;
  callMain: sinon.SinonSpy;
}

async function wait(ms: number): Promise<void> {
  return new Promise(resolve => {
    setTimeout(resolve, ms);
  });
}

function setupSpyModuleFunctions(m: MockModule): void {
  m.HEAPU8 = new Uint8Array(1);
  m.HEAPU8.set = (a: ArrayLike<number>, p: any) => {
    p.a = a;
  };
  m.lengthBytesUTF8 = sinon.spy((_: any) => {
    return 0;
  });
  m.UTF8ToString = sinon.spy((p: any) => {
    return p.s;
  });
  m.stringToUTF8 = sinon.spy((s: string, p: any) => {
    p.s = s;
  });
  m._malloc = sinon.spy((_: any) => {
    return {};
  });
  m._free = sinon.spy();
  m._create_context = sinon.spy();
  m._scanner_settings_new_from_json = sinon.spy((p: any) => {
    // Mock invalid config
    if (p.s === JSON.stringify({})) {
      return {
        s: ""
      };
    }

    return {
      s: JSON.stringify({})
    };
  });
  m._scanner_image_settings_new = sinon.spy();
  m._scanner_session_clear = sinon.spy();
  m._can_hide_logo = sinon.spy(() => {
    return 1;
  });
  m._scanner_scan = sinon.spy((imageData: { a: Uint8ClampedArray }) => {
    // Mock error
    if (imageData.a[0] === 255) {
      return {
        s: JSON.stringify({
          error: {
            errorCode: 1,
            errorMessage: "Error."
          }
        })
      };
    }

    return {
      s: JSON.stringify({ scanResult: [] })
    };
  });
  m._parser_parse_string = sinon.spy((parserType: number) => {
    // Mock error
    if (parserType >= 255) {
      return {
        s: JSON.stringify({
          error: {
            errorCode: parserType,
            errorMessage: "Error. This is a domain name."
          }
        })
      };
    }

    return {
      s: JSON.stringify({ result: { x: "y" } })
    };
  });
  m.callMain = sinon.spy();
}

declare const global: any;

let moduleInstance: MockModule;

Object.defineProperty(global, "self", {
  writable: true
});
Object.defineProperty(global, "postMessage", {
  writable: true
});
Object.defineProperty(global, "window", {
  writable: true
});
Object.defineProperty(global, "document", {
  writable: true
});

global.self = global;

global.Module = {};

global.crypto = {
  subtle: {
    digest: (_: string, data: ArrayBuffer) => {
      return Promise.resolve(
        crypto
          .createHash("sha256")
          .update(new DataView(data))
          .digest()
      );
    }
  }
};

global.fetch = (filePath: string) => {
  return new Promise((resolve, reject) => {
    filePath = filePath.split("?")[0];
    // tslint:disable-next-line:non-literal-fs-path
    if (!fs.existsSync(filePath)) {
      reject(new Error(`File not found: ${filePath}`));
    }
    try {
      // tslint:disable-next-line:non-literal-fs-path
      resolve(new Response(fs.readFileSync(filePath)));
    } catch (error) {
      reject(error);
    }
  });
};

global.importScripts = (filePath: string) => {
  filePath = filePath.split("?")[0];
  // tslint:disable-next-line:non-literal-fs-path
  if (!fs.existsSync(filePath)) {
    throw new Error(`File not found: ${filePath}`);
  }

  moduleInstance = global.Module;
  setupSpyModuleFunctions(moduleInstance);

  return new Promise(resolve => {
    // Retrieve wasmJSVersion variable
    // tslint:disable-next-line:non-literal-fs-path
    const readStream: fs.ReadStream = fs.createReadStream(filePath, { encoding: "utf8" });
    readStream.on("readable", () => {
      let dataString: string = "";
      let character: string = readStream.read(1);
      while (character !== ";") {
        dataString += character;
        character = readStream.read(1);
      }
      readStream.destroy();
      const regexMatch: RegExpMatchArray | null = dataString.match(/'(.+)'/);
      if (regexMatch != null) {
        (<any>self).wasmJSVersion = regexMatch[1];
      }

      moduleInstance.instantiateWasm({ env: {} }, () => {
        moduleInstance.preRun();
        moduleInstance.onRuntimeInitialized();
        resolve();
      });
    });
  });
};

global.FS = {
  mkdir: sinon.spy(),
  mount: sinon.spy(),
  syncfs: (_: boolean, callback: (e: any) => any) => {
    callback(undefined);
  }
};

global.IDBFS = null;

global.WebAssembly.instantiate = global.WebAssembly.instantiateStreaming = () => {
  return Promise.resolve({
    module: "module",
    instance: "instance"
  });
};

global.OffscreenCanvas = () => {
  return;
};

const postMessageSpy: sinon.SinonSpy = sinon.spy();
global.postMessage = postMessageSpy;

test.serial("engine load", async t => {
  let engineInstance: Engine = engine();

  // wrong paths
  const importScriptsSpy: sinon.SinonSpy = sinon.spy(global, "importScripts");
  const consoleErrorSpy: sinon.SinonSpy = sinon.spy(console, "error");
  const originalSetTimeout: (handler: TimerHandler, timeout: number) => number = global.setTimeout;
  const setTimeoutStub: sinon.SinonSpy = sinon.stub(global, "setTimeout").callsFake((...args): number => {
    return originalSetTimeout(<TimerHandler>args[0], <number>args[1] / 100);
  });
  // importScripts fails (js)
  await engineInstance.loadLibrary("fakeDeviceId", "./wrong-path/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.is(importScriptsSpy.callCount, 5);
  t.is(consoleErrorSpy.callCount, 2);
  // fetch fails (wasm)
  const fetchStub: sinon.SinonStub = sinon.stub(global, "fetch").rejects();
  importScriptsSpy.resetHistory();
  consoleErrorSpy.resetHistory();
  engineInstance = engine();
  // tslint:disable-next-line: no-floating-promises
  engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  await wait(8500);
  t.is(importScriptsSpy.callCount, 1);
  t.is(consoleErrorSpy.callCount, 2);
  t.is(fetchStub.callCount, 5);
  t.false(moduleInstance.callMain.called);
  fetchStub.restore();
  importScriptsSpy.restore();
  setTimeoutStub.restore();

  // instantiateStreaming fails, instantiate fails
  consoleErrorSpy.resetHistory();
  const instantiateStreamingStub: sinon.SinonStub = sinon.stub(global.WebAssembly, "instantiateStreaming").rejects();
  const instantiateStub: sinon.SinonStub = sinon.stub(global.WebAssembly, "instantiate").rejects();
  engineInstance = engine();
  // tslint:disable-next-line: no-floating-promises
  engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  await wait(2000);
  t.is(consoleErrorSpy.callCount, 2);
  t.true(instantiateStreamingStub.called);
  t.true(instantiateStub.called);
  t.false(moduleInstance.callMain.called);

  // instantiateStreaming fails, instantiate succeeds
  consoleErrorSpy.resetHistory();
  instantiateStub.restore();
  postMessageSpy.resetHistory();
  engineInstance = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.false(consoleErrorSpy.called);
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  instantiateStreamingStub.restore();

  // instantiateStreaming doesn't exist, instantiate succeeds
  consoleErrorSpy.resetHistory();
  const instantiateStreamingFunction: Function = global.WebAssembly.instantiateStreaming;
  global.WebAssembly.instantiateStreaming = null;
  postMessageSpy.resetHistory();
  engineInstance = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.false(consoleErrorSpy.called);
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  global.WebAssembly.instantiateStreaming = instantiateStreamingFunction;

  // instantiateStreaming succeeds
  consoleErrorSpy.resetHistory();
  postMessageSpy.resetHistory();
  engineInstance = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.false(consoleErrorSpy.called);
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));

  engineInstance.workOnScanQueue(); // Try to work on queue with non-ready engine
  t.is(postMessageSpy.callCount, 1);
  engineInstance.createContext("");
  t.is(postMessageSpy.callCount, 2);
  engineInstance.setSettings(JSON.stringify({})); // Try to set invalid settings
  engineInstance.workOnScanQueue(); // Try to work on queue with non-ready engine
  t.is(postMessageSpy.callCount, 2);
  engineInstance.clearSession(); // Try to clear non-existent session
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGBA_8U
  });
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGBA_8U
  }); // Set image settings again
  engineInstance.addScanWorkUnit({
    requestId: 0,
    data: new Uint8ClampedArray([0, 0, 0, 0]),
    highQualitySingleFrameMode: true
  }); // Add work unit to allow settings to be set
  engineInstance.setSettings(new ScanSettings().toJSONString());
  engineInstance.clearSession();
  consoleErrorSpy.restore();
});

test.serial("engine load - CDN", async t => {
  const originalSetTimeout: (handler: TimerHandler, timeout: number) => number = global.setTimeout;
  const setTimeoutStub: sinon.SinonSpy = sinon.stub(global, "setTimeout").callsFake((...args): number => {
    return originalSetTimeout(<TimerHandler>args[0], <number>args[1] / 100);
  });
  let engineInstance: Engine = engine();
  const importScriptsSpy: sinon.SinonSpy = sinon.spy(global, "importScripts");
  await engineInstance.loadLibrary(
    "fakeDeviceId",
    "https://cdn.jsdelivr.net/npm/scandit-sdk",
    "fakePath",
    "fakeDevice",
    "fakeBrowserName"
  );
  t.is(importScriptsSpy.callCount, 5);
  t.regex(
    importScriptsSpy.lastCall.args[0],
    /https:\/\/cdn.jsdelivr.net\/npm\/scandit-sdk@([1-9]+\.[0-9]+\.[0-9]+|%VER%)\/build\/scandit-engine-sdk.min.js/
  );
  engineInstance = engine();
  await engineInstance.loadLibrary(
    "fakeDeviceId",
    // tslint:disable-next-line:no-http-string
    "http://cdn.jsdelivr.net/npm/scandit-sdk@0.0.1",
    "fakePath",
    "fakeDevice",
    "fakeBrowserName"
  );
  t.is(importScriptsSpy.callCount, 10);
  t.regex(
    importScriptsSpy.lastCall.args[0],
    /https:\/\/cdn.jsdelivr.net\/npm\/scandit-sdk@([1-9]+\.[0-9]+\.[0-9]+|%VER%)\/build\/scandit-engine-sdk.min.js/
  );
  engineInstance = engine();
  await engineInstance.loadLibrary(
    "fakeDeviceId",
    "https://unpkg.com/scandit-sdk@4.0.0",
    "fakePath",
    "fakeDevice",
    "fakeBrowserName"
  );
  t.is(importScriptsSpy.callCount, 15);
  t.regex(
    importScriptsSpy.lastCall.args[0],
    /https:\/\/unpkg.com\/scandit-sdk@([1-9]+\.[0-9]+\.[0-9]+|%VER%)\/build\/scandit-engine-sdk.min.js/
  );
  engineInstance = engine();
  await engineInstance.loadLibrary(
    "fakeDeviceId",
    // tslint:disable-next-line:no-http-string
    "http://unpkg.com/scandit-sdk@0.0.1",
    "fakePath",
    "fakeDevice",
    "fakeBrowserName"
  );
  t.is(importScriptsSpy.callCount, 20);
  t.regex(
    importScriptsSpy.lastCall.args[0],
    /https:\/\/unpkg.com\/scandit-sdk@([1-9]+\.[0-9]+\.[0-9]+|%VER%)\/build\/scandit-engine-sdk.min.js/
  );
  engineInstance = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./wrong-path/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.is(importScriptsSpy.callCount, 25);
  t.regex(importScriptsSpy.lastCall.args[0], /^\.\/wrong-path\//);
  setTimeoutStub.restore();
  importScriptsSpy.restore();
});

test.serial("engine license features", async t => {
  postMessageSpy.resetHistory();
  const engineInstance: Engine = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  engineInstance.createContext("");
  t.is(postMessageSpy.callCount, 2);
  t.deepEqual(postMessageSpy.getCall(1).args[0], [
    "license-features",
    {
      hiddenScanditLogoAllowed: true
    }
  ]);
});

test.serial("engine scan", async t => {
  function getWorkResult(requestId: number): [string, any] {
    return [
      "work-result",
      {
        result: {
          scanResult: []
        },
        requestId
      }
    ];
  }
  postMessageSpy.resetHistory();
  const engineInstance: Engine = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  engineInstance.createContext("");
  t.is(postMessageSpy.callCount, 2);
  engineInstance.addScanWorkUnit({
    requestId: 0,
    data: new Uint8ClampedArray([0, 0, 0, 0]),
    highQualitySingleFrameMode: true
  }); // Try to add work unit with non-ready engine
  t.is(postMessageSpy.callCount, 2);
  engineInstance.setSettings(new ScanSettings().toJSONString());
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGBA_8U
  });
  engineInstance.addScanWorkUnit({
    requestId: 1,
    data: new Uint8ClampedArray([0, 0, 0, 0]),
    highQualitySingleFrameMode: true
  });
  t.is(postMessageSpy.callCount, 4);
  t.deepEqual(postMessageSpy.getCall(2).args, [getWorkResult(0), undefined]);
  t.deepEqual(postMessageSpy.getCall(3).args, [getWorkResult(1), undefined]);
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGB_8U
  }); // Set image settings again
  engineInstance.addScanWorkUnit({
    requestId: 2,
    data: new Uint8ClampedArray([0, 0, 0]),
    highQualitySingleFrameMode: false
  });
  t.is(postMessageSpy.callCount, 5);
  t.deepEqual(postMessageSpy.getCall(4).args, [getWorkResult(2), undefined]);
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.GRAY_8U
  }); // Set image settings again
  engineInstance.addScanWorkUnit({
    requestId: 3,
    data: new Uint8ClampedArray([0]),
    highQualitySingleFrameMode: false
  });
  t.is(postMessageSpy.callCount, 6);
  t.deepEqual(postMessageSpy.getCall(5).args, [getWorkResult(3), undefined]);

  postMessageSpy.resetHistory();
  const engineInstance2: Engine = engine();
  await engineInstance2.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "Firefox");
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  engineInstance2.createContext("");
  t.is(postMessageSpy.callCount, 2);
  engineInstance2.setSettings(new ScanSettings().toJSONString());
  engineInstance2.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.GRAY_8U
  });
  engineInstance2.addScanWorkUnit({
    requestId: 0,
    data: new Uint8ClampedArray([0]),
    highQualitySingleFrameMode: false
  });
  t.is(postMessageSpy.callCount, 3);
  t.deepEqual(postMessageSpy.getCall(2).args[0], getWorkResult(0));
  t.truthy(postMessageSpy.getCall(2).args[0]);
});

test.serial("engine scan error", async t => {
  postMessageSpy.resetHistory();
  const engineInstance: Engine = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  engineInstance.createContext("");
  engineInstance.setSettings(new ScanSettings().toJSONString());
  engineInstance.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGB_8U
  });
  engineInstance.addScanWorkUnit({
    requestId: 0,
    data: new Uint8ClampedArray([255, 255, 255]), // Triggers a mock error
    highQualitySingleFrameMode: false
  });
  t.is(postMessageSpy.callCount, 3);
  t.deepEqual(postMessageSpy.getCall(2).args, [
    [
      "work-error",
      {
        error: {
          errorCode: 1,
          errorMessage: "Error."
        },
        requestId: 0
      }
    ],
    undefined
  ]);

  postMessageSpy.resetHistory();
  const engineInstance2: Engine = engine();
  await engineInstance2.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "Firefox");
  engineInstance2.createContext("");
  engineInstance2.setSettings(new ScanSettings().toJSONString());
  engineInstance2.setImageSettings({
    width: 1,
    height: 1,
    format: ImageSettings.Format.RGB_8U
  });
  engineInstance2.addScanWorkUnit({
    requestId: 0,
    data: new Uint8ClampedArray([255, 255, 255]), // Triggers a mock error
    highQualitySingleFrameMode: false
  });
  t.is(postMessageSpy.callCount, 3);
  t.deepEqual(postMessageSpy.getCall(2).args[0], [
    "work-error",
    {
      error: {
        errorCode: 1,
        errorMessage: "Error."
      },
      requestId: 0
    }
  ]);
  t.truthy(postMessageSpy.getCall(2).args[1]);
});

test.serial("engine parse", async t => {
  postMessageSpy.resetHistory();
  const engineInstance: Engine = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  engineInstance.addParseWorkUnit({
    requestId: 0,
    dataFormat: Parser.DataFormat.DLID,
    dataString: "test",
    options: JSON.stringify({})
  }); // Try to add work unit with non-ready engine
  t.is(postMessageSpy.callCount, 1);
  engineInstance.createContext("");
  t.is(postMessageSpy.callCount, 2);
  engineInstance.addParseWorkUnit({
    requestId: 1,
    dataFormat: Parser.DataFormat.GS1_AI,
    dataString: "test",
    options: JSON.stringify({})
  });
  t.is(postMessageSpy.callCount, 4);
  t.deepEqual(postMessageSpy.getCall(2).args[0], [
    "parse-string-result",
    {
      result: {
        x: "y"
      },
      requestId: 0
    }
  ]);
  t.deepEqual(postMessageSpy.getCall(3).args[0], [
    "parse-string-result",
    {
      result: {
        x: "y"
      },
      requestId: 1
    }
  ]);
  engineInstance.addParseWorkUnit({
    requestId: 2,
    dataFormat: Parser.DataFormat.HIBC,
    dataString: "test",
    options: JSON.stringify({})
  });
  engineInstance.addParseWorkUnit({
    requestId: 3,
    dataFormat: Parser.DataFormat.MRTD,
    dataString: "test",
    options: JSON.stringify({})
  });
  engineInstance.addParseWorkUnit({
    requestId: 4,
    dataFormat: Parser.DataFormat.SWISSQR,
    dataString: "test",
    options: JSON.stringify({})
  });
  t.is(postMessageSpy.callCount, 7);
});

test.serial("engine parse error", async t => {
  postMessageSpy.resetHistory();
  const engineInstance: Engine = engine();
  await engineInstance.loadLibrary("fakeDeviceId", "./build/", "fakePath", "fakeDevice", "fakeBrowserName");
  t.true(moduleInstance.callMain.called);
  t.true(postMessageSpy.calledOnceWithExactly(["status", "ready"]));
  engineInstance.createContext("");
  t.is(postMessageSpy.callCount, 2);
  engineInstance.addParseWorkUnit({
    requestId: 0,
    dataFormat: 255, // Triggers a mock error
    dataString: "test",
    options: JSON.stringify({})
  });
  t.is(postMessageSpy.callCount, 3);
  t.deepEqual(postMessageSpy.getCall(2).args[0], [
    "parse-string-error",
    {
      error: {
        errorCode: 255,
        errorMessage: "Error. This is a domain name."
      },
      requestId: 0
    }
  ]);
  engineInstance.addParseWorkUnit({
    requestId: 1,
    dataFormat: 260, // Triggers a mock error
    dataString: "test",
    options: JSON.stringify({})
  });
  t.is(postMessageSpy.callCount, 4);
  t.deepEqual(postMessageSpy.getCall(3).args[0], [
    "parse-string-error",
    {
      error: {
        errorCode: 260,
        errorMessage: "Error. This is a domain name (example.com)."
      },
      requestId: 1
    }
  ]);
});