const expect = require("chai").expect;
const { asBase64 } = require("../../../lib/utils/fun.js");
const {
  BINARY_HEADERS_1,
  SPEC_V1,
  HEADER_CONTENT_TYPE
} = require("../../../lib/bindings/http/constants.js");
const ValidationError = require("../../../lib/validation_error.js");

const HTTPBinaryReceiver =
  require("../../../lib/bindings/http/receiver_binary_1.js");

const receiver = new HTTPBinaryReceiver();

describe("HTTP Transport Binding Binary Receiver for CloudEvents v1.0", () => {
  describe("Check", () => {
    it("Throw error when payload arg is null or undefined", () => {
      // setup
      const payload = null;
      const attributes = {};

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "payload is null or undefined");
    });

    it("Throw error when attributes arg is null or undefined", () => {
      // setup
      const payload = {};
      const attributes = null;

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "attributes is null or undefined");
    });

    it("Throw error when payload is not an object or string", () => {
      // setup
      const payload = 1.2;
      const attributes = {};

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "payload must be an object or a string");
    });

    it("Throw error when headers has no 'ce-type'", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.SPEC_VERSION]: "specversion",
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "header 'ce-type' not found");
    });

    it("Throw error when headers has no 'ce-specversion'", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "header 'ce-specversion' not found");
    });

    it("Throw error when headers has no 'ce-source'", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: "specversion",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "header 'ce-source' not found");
    });

    it("Throw error when headers has no 'ce-id'", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: "specversion",
        [BINARY_HEADERS_1.SOURCE]: "source",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "header 'ce-id' not found");
    });

    it("Throw error when spec is not 1.0", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: "0.2",
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.parse.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "invalid spec version");
    });

    it("Throw error when the content-type is invalid", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: "specversion",
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "text/html"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.throw(ValidationError, "invalid content type");
    });

    it("No error when content-type is unspecified", () => {
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.not.throw();
    });

    it("No error when all required headers are in place", () => {
      // setup
      const payload = {};
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act and assert
      expect(receiver.check.bind(receiver, payload, attributes))
        .to.not.throw();
    });
  });

  describe("Parse", () => {
    it("CloudEvent contains 'type'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getType()).to.equal("type");
    });

    it("CloudEvent contains 'specversion'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getSpecversion()).to.equal(SPEC_V1);
    });

    it("CloudEvent contains 'source'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getSource()).to.equal("/source");

    });

    it("CloudEvent contains 'id'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getId()).to.equal("id");
    });

    it("CloudEvent contains 'time'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getTime()).to.equal("2019-06-16T11:42:00.000Z");
    });

    it("CloudEvent contains 'dataschema'", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getDataschema()).to.equal("http://schema.registry/v1");
    });

    it("CloudEvent contains 'contenttype' (application/json)", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getDataContentType()).to.equal("application/json");
    });

    it("CloudEvent contains 'contenttype' (application/octet-stream)", () => {
      // setup
      const payload = "The payload is binary data";
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/octet-stream"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getDataContentType()).to.equal("application/octet-stream");
    });

    it("CloudEvent contains 'data' (application/json)", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getData()).to.deep.equal(payload);
    });

    it("CloudEvent contains 'data' (application/octet-stream)", () => {
      // setup
      const payload = "The payload is binary data";
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/octet-stream"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getData()).to.deep.equal(payload);
    });

    it("The content of 'data' is base64 for binary", () => {
      // setup
      const expected = {
        data: "dataString"
      };

      const bindata = Uint32Array
        .from(JSON.stringify(expected), (c) => c.codePointAt(0));
      const payload = asBase64(bindata);

      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "/source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual.getData()).to.deep.equal(expected);
    });

    it("No error when all attributes are in place", () => {
      // setup
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json"
      };

      // act
      const actual = receiver.parse(payload, attributes);

      // assert
      expect(actual).to.be.an("object");

      expect(actual).to.have.property("format");
    });

    it("Should accept 'extension1'", () => {
      // setup
      const extension1 = "mycustom-ext1";
      const payload = {
        data: "dataString"
      };
      const attributes = {
        [BINARY_HEADERS_1.TYPE]: "type",
        [BINARY_HEADERS_1.SPEC_VERSION]: SPEC_V1,
        [BINARY_HEADERS_1.SOURCE]: "source",
        [BINARY_HEADERS_1.ID]: "id",
        [BINARY_HEADERS_1.TIME]: "2019-06-16T11:42:00Z",
        [BINARY_HEADERS_1.DATA_SCHEMA]: "http://schema.registry/v1",
        [HEADER_CONTENT_TYPE]: "application/json",
        [`${[BINARY_HEADERS_1.EXTENSIONS_PREFIX]}extension1`]: extension1
      };

      // act
      const actual = receiver.parse(payload, attributes);
      const actualExtensions = actual.getExtensions();

      // assert
      expect(actualExtensions.extension1).to.equal(extension1);
    });
  });
});