const expect = require("chai").expect;
const nock = require("nock");
const https = require("https");
const { asBase64 } = require("../lib/utils/fun.js");
const {
  SPEC_V1
} = require("../lib/bindings/http/constants.js");

const { Spec } = require("../v1/index.js");
const CloudEvent = require("../lib/cloudevent.js");
const BinaryHTTPEmitter = require("../lib/bindings/http/emitter_binary.js");
const StructuredHTTPEmitter = require("../lib/bindings/http/emitter_structured.js");
const type = "com.github.pull.create";
const source = "urn:event:from:myapi/resource/123";
const contentType = "application/cloudevents+json; charset=utf-8";
const now = new Date();
const dataschema = "http://cloudevents.io/schema.json";

const ceContentType = "application/json";

const data = {
  foo: "bar"
};

const ext1Name = "extension1";
const ext1Value = "foobar";
const ext2Name = "extension2";
const ext2Value = "acme";

const cloudevent = new CloudEvent(Spec)
  .type(type)
  .source(source)
  .dataContentType(ceContentType)
  .subject("subject.ext")
  .time(now)
  .dataschema(dataschema)
  .data(data)
  .addExtension(ext1Name, ext1Value)
  .addExtension(ext2Name, ext2Value);

const dataString = ")(*~^my data for ce#@#$%";

const webhook = "https://cloudevents.io/webhook/v1";
const httpcfg = {
  method: "POST",
  url: `${webhook}/json`
};

const binary = new BinaryHTTPEmitter(SPEC_V1);
const structured = new StructuredHTTPEmitter();

describe("HTTP Transport Binding - Version 1.0", () => {
  beforeEach(() => {
    // Mocking the webhook
    nock(webhook)
      .post("/json")
      .reply(201, { status: "accepted" });
  });

  describe("Structured", () => {
    it("works with mTLS authentication", () => {
      const event = new StructuredHTTPEmitter({
        method: "POST",
        url: `${webhook}/json`,
        httpsAgent: new https.Agent({
          cert: "some value",
          key: "other value"
        })
      });
      return event.emit(httpcfg, cloudevent).then((response) => {
        expect(response.config.headers["Content-Type"])
          .to.equal(contentType);
      });
    });

    describe("JSON Format", () => {
      it(`requires '${contentType}' Content-Type in the header`,
        () => structured.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(response.config.headers["Content-Type"])
              .to.equal(contentType);
          }));

      it("the request payload should be correct",
        () => structured.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(JSON.parse(response.config.data))
              .to.deep.equal(cloudevent.format());
          }));

      describe("Binary event data", () => {
        it("the request payload should be correct when data is binary", () => {
          const bindata = Uint32Array.from(dataString, (c) => c.codePointAt(0));
          const expected = asBase64(bindata);
          const binevent =
            new CloudEvent(Spec)
              .type(type)
              .source(source)
              .dataContentType("text/plain")
              .data(bindata)
              .addExtension(ext1Name, ext1Value)
              .addExtension(ext2Name, ext2Value);

          return structured.emit(httpcfg, binevent)
            .then((response) => {
              expect(JSON.parse(response.config.data).data_base64)
                .to.equal(expected);
            });
        });

        it("the payload must have 'data_base64' when data is binary", () => {
          const binevent =
            new CloudEvent(Spec)
              .type(type)
              .source(source)
              .dataContentType("text/plain")
              .data(Uint32Array.from(dataString, (c) => c.codePointAt(0)))
              .addExtension(ext1Name, ext1Value)
              .addExtension(ext2Name, ext2Value);

          return structured.emit(httpcfg, binevent)
            .then((response) => {
              expect(JSON.parse(response.config.data))
                .to.have.property("data_base64");
            });
        });
      });
    });
  });

  describe("Binary", () => {
    it("works with mTLS authentication", () =>
      binary.emit({
        method: "POST",
        url: `${webhook}/json`,
        httpsAgent: new https.Agent({
          cert: "some value",
          key: "other value"
        })
      }, cloudevent).then((response) => {
        expect(response.config.headers["Content-Type"])
          .to.equal(cloudevent.getDataContentType());
      })
    );

    describe("JSON Format", () => {
      it(`requires '${cloudevent.getDataContentType()}' in the header`,
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(response.config.headers["Content-Type"])
              .to.equal(cloudevent.getDataContentType());
          }));

      it("the request payload should be correct", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(JSON.parse(response.config.data))
            .to.deep.equal(cloudevent.getData());
        }));

      it("the request payload should be correct when event data is binary",
        () => {
          const bindata = Uint32Array.from(dataString, (c) => c.codePointAt(0));
          const expected = asBase64(bindata);
          const binevent =
          new CloudEvent(Spec)
            .type(type)
            .source(source)
            .dataContentType("text/plain")
            .data(bindata)
            .addExtension(ext1Name, ext1Value)
            .addExtension(ext2Name, ext2Value);

          return binary.emit(httpcfg, binevent)
            .then((response) => {
              expect(response.config.data)
                .to.equal(expected);
            });
        });

      it("HTTP Header contains 'ce-type'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-type");
        }));

      it("HTTP Header contains 'ce-specversion'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-specversion");
        }));

      it("HTTP Header contains 'ce-source'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-source");
        }));

      it("HTTP Header contains 'ce-id'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-id");
        }));

      it("HTTP Header contains 'ce-time'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-time");
        }));

      it("HTTP Header contains 'ce-dataschema'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-dataschema");
        }));

      it(`HTTP Header contains 'ce-${ext1Name}'`, () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property(`ce-${ext1Name}`);
        }));

      it(`HTTP Header contains 'ce-${ext2Name}'`, () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property(`ce-${ext2Name}`);
        }));

      it("HTTP Header contains 'ce-subject'", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(response.config.headers)
            .to.have.property("ce-subject");
        }));

      it("should 'ce-type' have the right value", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(cloudevent.getType())
            .to.equal(response.config.headers["ce-type"]);
        }));

      it("should 'ce-specversion' have the right value",
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getSpecversion())
              .to.equal(response.config.headers["ce-specversion"]);
          }));

      it("should 'ce-source' have the right value",
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getSource())
              .to.equal(response.config.headers["ce-source"]);
          }));

      it("should 'ce-id' have the right value", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(cloudevent.getId())
            .to.equal(response.config.headers["ce-id"]);
        }));

      it("should 'ce-time' have the right value", () => binary.emit(httpcfg, cloudevent)
        .then((response) => {
          expect(cloudevent.getTime())
            .to.equal(response.config.headers["ce-time"]);
        }));

      it("should 'ce-dataschema' have the right value",
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getDataschema())
              .to.equal(response.config.headers["ce-dataschema"]);
          }));

      it(`should 'ce-${ext1Name}' have the right value`,
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getExtensions()[ext1Name])
              .to.equal(response.config.headers[`ce-${ext1Name}`]);
          }));

      it(`should 'ce-${ext2Name}' have the right value`,
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getExtensions()[ext2Name])
              .to.equal(response.config.headers[`ce-${ext2Name}`]);
          }));

      it("should 'ce-subject' have the right value",
        () => binary.emit(httpcfg, cloudevent)
          .then((response) => {
            expect(cloudevent.getSubject())
              .to.equal(response.config.headers["ce-subject"]);
          }));
    });
  });
});