import { byKey, byValueLength, byNestedKeys } from "./comparators";

const createObject = (key: string, value?: string) => {
  return {
    [key]: value
  };
};

const createObjects = (key: string, values: Array<string | undefined>) => {
  return values.map(v => createObject(key, v));
};

describe("key comparator tests", () => {
  it("should sort array", () => {
    const array = createObjects("key", ["z", "a", "y", "b"]);
    array.sort(byKey("key"));
    expect(array).toEqual(createObjects("key", ["a", "b", "y", "z"]));
  });

  it("should not fail if value is undefined", () => {
    const array = createObjects("key", ["z", undefined, "a"]);
    array.sort(byKey("key"));
    expect(array).toEqual(createObjects("key", ["a", "z", undefined]));
  });

  it("should not fail if key is undefined", () => {
    const array = createObjects("key", ["a"]);
    array.push({});
    array.push(createObject("key", "z"));
    array.sort(byKey("key"));
    expect(array).toEqual([createObject("key", "a"), createObject("key", "z"), {}]);
  });

  it("should not fail if item is undefined", () => {
    const array: any[] = createObjects("key", ["a"]);
    array.push(undefined);
    array.push(createObject("key", "z"));
    array.sort(byKey("key"));
    expect(array).toEqual([createObject("key", "a"), createObject("key", "z"), undefined]);
  });
});

describe("length comparator tests", () => {
  it("should sort array", () => {
    const array = createObjects("key", ["....", ".", "...", ".."]);
    array.sort(byValueLength("key"));
    expect(array).toEqual(createObjects("key", [".", "..", "...", "...."]));
  });

  it("should not fail if value is undefined", () => {
    const array = createObjects("key", ["..", undefined, "."]);
    array.sort(byValueLength("key"));
    expect(array).toEqual(createObjects("key", [".", "..", undefined]));
  });

  it("should not fail if key is undefined", () => {
    const array = createObjects("key", ["."]);
    array.push({});
    array.push(createObject("key", ".."));
    array.sort(byValueLength("key"));
    expect(array).toEqual([createObject("key", "."), createObject("key", ".."), {}]);
  });

  it("should not fail if item is undefined", () => {
    const array: any[] = createObjects("key", ["."]);
    array.push(undefined);
    array.push(createObject("key", ".."));
    array.sort(byValueLength("key"));
    expect(array).toEqual([createObject("key", "."), createObject("key", ".."), undefined]);
  });
});

describe("nested key comparator tests", () => {
  const createObject = (key: string, nested?: string, value?: string) => {
    if (!nested) {
      return {
        [key]: undefined
      };
    }
    return {
      [key]: {
        [nested]: value
      }
    };
  };

  const createObjects = (key: string, nested: string, values: Array<string | undefined>) => {
    return values.map(v => createObject(key, nested, v));
  };

  it("should sort array", () => {
    const array = createObjects("key", "nested", ["z", "a", "y", "b"]);
    array.sort(byNestedKeys("key", "nested"));
    expect(array).toEqual(createObjects("key", "nested", ["a", "b", "y", "z"]));
  });

  it("should not fail if value is undefined", () => {
    const array = createObjects("key", "nested", ["z", undefined, "a"]);
    array.sort(byNestedKeys("key", "nested"));
    expect(array).toEqual(createObjects("key", "nested", ["a", "z", undefined]));
  });

  it("should not fail if key is undefined", () => {
    const array = createObjects("key", "nested", ["a"]);
    array.push({});
    array.push(createObject("key", "nested", "z"));
    array.sort(byNestedKeys("key", "nested"));
    expect(array).toEqual([createObject("key", "nested", "a"), createObject("key", "nested", "z"), {}]);
  });

  it("should not fail if nested key is undefined", () => {
    const array = createObjects("key", "nested", ["a"]);
    array.push(createObject("key", undefined, "y"));
    array.push(createObject("key", "nested", "z"));
    array.sort(byNestedKeys("key", "nested"));
    expect(array).toEqual([createObject("key", "nested", "a"), createObject("key", "nested", "z"), { key: undefined }]);
  });

  it("should not fail if item is undefined", () => {
    const array: any[] = createObjects("key", "nested", ["a"]);
    array.push(undefined);
    array.push(createObject("key", "nested", "z"));
    array.sort(byNestedKeys("key", "nested"));
    expect(array).toEqual([createObject("key", "nested", "a"), createObject("key", "nested", "z"), undefined]);
  });
});