/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import fetchMock from "fetch-mock-jest";
import { Diff } from "@scm-manager/ui-types";
import { act, renderHook } from "@testing-library/react-hooks";
import { useDiff } from "./diff";
import createWrapper from "./tests/createWrapper";

describe("Test diff", () => {
  const simpleDiff: Diff = {
    files: [
      {
        oldPath: "/dev/null",
        newPath: "0.txt",
        oldEndingNewLine: true,
        newEndingNewLine: true,
        oldRevision: "0000000000000000000000000000000000000000",
        newRevision: "573541ac9702dd3969c9bc859d2b91ec1f7e6e56",
        type: "add",
        language: "text",
        hunks: [
          {
            content: "@@ -0,0 +1 @@",
            newStart: 1,
            newLines: 1,
            changes: [
              {
                content: "0",
                type: "insert",
                lineNumber: 1,
                isInsert: true
              }
            ]
          }
        ],
        _links: {
          lines: {
            href:
              "/api/v2/repositories/scmadmin/HeartOfGold-git/content/one_to_onehundred/0.txt?start={start}&end={end}",
            templated: true
          }
        }
      }
    ],
    partial: false,
    _links: {
      self: {
        href: "/api/v2/diff"
      }
    }
  };

  const partialDiff1: Diff = {
    files: [
      {
        oldPath: "/dev/null",
        newPath: "0.txt",
        oldEndingNewLine: true,
        newEndingNewLine: true,
        oldRevision: "0000000000000000000000000000000000000000",
        newRevision: "573541ac9702dd3969c9bc859d2b91ec1f7e6e56",
        type: "add",
        language: "text",
        hunks: [
          {
            content: "@@ -0,0 +1 @@",
            newStart: 1,
            newLines: 1,
            changes: [
              {
                content: "0",
                type: "insert",
                lineNumber: 1,
                isInsert: true
              }
            ]
          }
        ],
        _links: {
          lines: {
            href:
              "/api/v2/repositories/scmadmin/HeartOfGold-git/content/one_to_onehundred/0.txt?start={start}&end={end}",
            templated: true
          }
        }
      }
    ],
    partial: true,
    _links: {
      self: {
        href: "/diff"
      },
      next: {
        href: "/diff?offset=1&limit=1"
      }
    }
  };

  const partialDiff2: Diff = {
    files: [
      {
        oldPath: "/dev/null",
        newPath: "1.txt",
        oldEndingNewLine: true,
        newEndingNewLine: true,
        oldRevision: "0000000000000000000000000000000000000000",
        newRevision: "573541ac9702dd3969c9bc859d2b91ec1f7e6e56",
        type: "add",
        language: "text",
        hunks: [
          {
            content: "@@ -0,0 +1 @@",
            newStart: 1,
            newLines: 1,
            changes: [
              {
                content: "1",
                type: "insert",
                lineNumber: 1,
                isInsert: true
              }
            ]
          }
        ],
        _links: {
          lines: {
            href:
              "/api/v2/repositories/scmadmin/HeartOfGold-git/content/one_to_onehundred/1.txt?start={start}&end={end}",
            templated: true
          }
        }
      }
    ],
    partial: false,
    _links: {
      self: {
        href: "/diff"
      }
    }
  };

  beforeEach(() => {
    fetchMock.reset();
  });

  it("should return simple parsed diff", async () => {
    fetchMock.getOnce("/api/v2/diff", {
      body: simpleDiff,
      headers: { "Content-Type": "application/vnd.scmm-diffparsed+json;v=2" }
    });
    const { result, waitFor } = renderHook(() => useDiff("/diff"), {
      wrapper: createWrapper()
    });
    await waitFor(() => !!result.current.data);
    expect(result.current.data).toEqual(simpleDiff);
  });

  it("should parse and return textual diff", async () => {
    fetchMock.getOnce("/api/v2/diff", {
      body: `diff --git a/new.txt b/new.txt
--- a/new.txt
+++ b/new.txt
@@ -1,1 +1,1 @@
-i am old!
\\ No newline at end of file
+i am new!
\\ No newline at end of file
`,
      headers: { "Content-Type": "text/plain" }
    });
    const { result, waitFor } = renderHook(() => useDiff("/diff"), {
      wrapper: createWrapper()
    });
    await waitFor(() => !!result.current.data);
    expect(result.current.data?.files).toHaveLength(1);
  });

  it("should return parsed diff in multiple chunks", async () => {
    fetchMock.getOnce("/api/v2/diff?limit=1", {
      body: partialDiff1,
      headers: { "Content-Type": "application/vnd.scmm-diffparsed+json;v=2" }
    });
    fetchMock.getOnce("/api/v2/diff?offset=1&limit=1", {
      body: partialDiff2,
      headers: { "Content-Type": "application/vnd.scmm-diffparsed+json;v=2" }
    });
    const { result, waitFor, waitForNextUpdate } = renderHook(() => useDiff("/diff?limit=1"), {
      wrapper: createWrapper()
    });
    await waitFor(() => !!result.current.data);
    expect(result.current.data).toEqual(partialDiff1);

    await act(() => {
      const { fetchNextPage } = result.current;
      fetchNextPage();
      return waitForNextUpdate();
    });

    await waitFor(() => !result.current.isFetchingNextPage);

    expect(result.current.data).toEqual({ ...partialDiff2, files: [partialDiff1.files[0], partialDiff2.files[0]] });
  });
});