import Isikukood, { Gender, PersonalData } from "../src/isikukood";
/**
 *  Isikukood test suite.
 *
 *  @author Jaak Ritso
 *  @author Dmitri Smirnov
 *
 *  @2014-2023
 */
("use strict");

describe("Generated Isikukood", () => {
  const generatedIK: string = Isikukood.generate();
  const ik: Isikukood = new Isikukood(generatedIK);
  it("should validate", () => {
    expect(ik.validate()).toBe(true);
  });

  it("should return birthday", () => {
    expect(ik.getBirthday()).toBeDefined();
    expect(ik.getBirthday()).toBeTruthy();
  });

  it("should return age", () => {
    expect(ik.getAge()).toBeDefined();
    expect(ik.getAge()).toBeTruthy();
    expect(ik.getAge() >= 0).toBe(true);
  });

  it("should return gender", () => {
    expect(ik.getGender()).toBeDefined();
    expect(ik.getGender()).toBeTruthy();
  });

  it("should have correct controlNumber", () => {
    const lastNumber: number = parseInt(generatedIK[10]);
    expect(ik.getControlNumber()).toBeDefined();
    expect(ik.getControlNumber()).toEqual(lastNumber);
  });

  it("should have correct day in range of 01 to 31 (#7)", () => {
    for (let i = 0; i < 200; i++) {
      expect(Isikukood.generate().substring(5, 7)).not.toBe("00");
    }
  });

  describe("generated Isikukood (#7)", () => {
    Array(200)
      .fill(null)
      .map(() => Isikukood.generate())
      .forEach((code) => {
        it(code + " should be valid", () => {
          const ik: Isikukood = new Isikukood(code);
          expect(ik.validate()).toBe(true);
        });
      });
  });

  describe("It should generate female code (#28)", () => {
    Array(200)
      .fill(null)
      .map(() =>
        Isikukood.generate({
          gender: Gender.FEMALE,
        })
      )
      .forEach((code) => {
        it("should be female code", () => {
          const ik: Isikukood = new Isikukood(code);
          expect(ik.getGender()).toBe(Gender.FEMALE);
        });
      });
  });

  describe("It should generate male code (#28)", () => {
    Array(200)
      .fill(null)
      .map(() =>
        Isikukood.generate({
          gender: Gender.MALE,
        })
      )
      .forEach((code) => {
        it("should be female code", () => {
          const ik: Isikukood = new Isikukood(code);
          expect(ik.getGender()).toBe(Gender.MALE);
        });
      });
  });
});

describe("Isikukood 35703150220", () => {
  const ik: Isikukood = new Isikukood("35703150220");
  it("should validate", () => {
    expect(ik.validate()).toBe(true);
  });

  it("should return male as a gender", () => {
    expect(ik.getGender()).toBe(Gender.MALE);
  });

  it("should return age correctly", () => {
    const correct_bd = new Date(1957, 2, 15);
    expect(ik.getAge()).toBe(getAge(correct_bd));
    expect(ik.getAge() >= 0).toBe(true);
  });

  it("should return birthday as 15.03.1957", () => {
    const correct_bd = new Date(1957, 2, 15);
    expect(ik.getBirthday()).toEqual(correct_bd);
  });

  it("should not return birthday as 01.03.1957", () => {
    const wrong_bd = new Date(1957, 2, 1);
    expect(ik.getBirthday()).not.toEqual(wrong_bd);
  });

  it("should have controlNumber 0", () => {
    expect(ik.getControlNumber()).toEqual(0);
  });

  it("should parse the id", () => {
    const expBD = new Date(1957, 2, 15);
    const exp: PersonalData = {
      gender: Gender.MALE,
      age: getAge(expBD),
      birthDay: expBD,
    };
    let got = Isikukood.parse(ik.code);
    expect(got).toStrictEqual(exp);
    got = ik.parse();
    expect(got).toStrictEqual(exp);
  });
});

describe("Isikukood 48709172756", () => {
  const ik: Isikukood = new Isikukood("48709172756");

  it("should not validate", () => {
    expect(ik.validate()).toBe(false);
  });

  it("should return female as a gender", () => {
    expect(ik.getGender()).toBe(Gender.FEMALE);
  });

  it("should return correct age", () => {
    const correctBD: Date = new Date(1987, 8, 17);
    expect(ik.getAge()).toBe(getAge(correctBD));
    expect(ik.getAge() >= 0).toBe(true);
  });

  it("should have controlNumber 6", () => {
    expect(ik.getControlNumber()).not.toEqual(6);
  });
});

describe("Isikukood 28709172754", () => {
  const ik: Isikukood = new Isikukood("28709172754");

  it("should not validate", () => {
    expect(ik.validate()).toBe(false);
  });

  it("should return female as a gender", () => {
    expect(ik.getGender()).toBe(Gender.FEMALE);
  });

  it("should return correct age", () => {
    const correctBD: Date = new Date(1887, 8, 17);
    expect(ik.getAge()).toBe(getAge(correctBD));
    expect(ik.getAge() >= 0).toBe(true);
  });

  it("should have controlNumber 6", () => {
    expect(ik.getControlNumber()).not.toEqual(6);
  });
});

describe("Isikukood 49200186017", () => {
  const ik: Isikukood = new Isikukood("49200186017");
  it("should not validate", () => {
    expect(ik.validate()).toBe(false);
  });
});

describe("Isikukood 60311213742 (#5)", () => {
  const ik: Isikukood = new Isikukood("60311213742");
  it("should validate", () => {
    expect(ik.validate()).toBe(true);
  });

  it("should parse the id", () => {
    const expBD = new Date(2003, 10, 21);
    const exp: PersonalData = {
      gender: Gender.FEMALE,
      age: getAge(expBD),
      birthDay: expBD,
    };
    let got: PersonalData = Isikukood.parse(ik.code);
    expect(got).toStrictEqual(exp);
    got = ik.parse();
    expect(got).toStrictEqual(exp);
  });
});

describe("Isikukood as a number", () => {
  it("should validate", () => {
    const ik = new Isikukood(60311213742);
    expect(ik.validate()).toBe(true);
  });
});

describe("Strange codes (#22)", () => {
  it("should not start with zero", () => {
    const ik = new Isikukood("01010101010");
    expect(ik.validate()).toBe(false);
  });
});

describe("getAge updated method", () => {
  it("should return correct age for historical date (1957-03-15)", () => {
    const ik: Isikukood = new Isikukood("35703150220");
    const expectedAge = getAge(new Date(1957, 2, 15));
    expect(ik.getAge()).toBe(expectedAge);
  });

  it("should return correct age for recent date (2003-11-21)", () => {
    const ik: Isikukood = new Isikukood("60311213742");
    const expectedAge = getAge(new Date(2003, 10, 21));
    expect(ik.getAge()).toBe(expectedAge);
  });

  it("should return non-negative age", () => {
    for (let i = 0; i < 50; i++) {
      const ik: Isikukood = new Isikukood(Isikukood.generate());
      expect(ik.getAge() >= 0).toBe(true);
    }
  });

  it("should handle birthday that has not occurred this year", () => {
    const today = new Date();
    const nextMonthDate = new Date(
      today.getFullYear() - 20,
      today.getMonth() + 1,
      15
    );
    const expectedAge = getAge(nextMonthDate);
    const ik: Isikukood = new Isikukood(
      Isikukood.generate({
        birthYear: nextMonthDate.getFullYear(),
        birthMonth: nextMonthDate.getMonth() + 1,
        birthDay: 15,
      })
    );
    expect(ik.getAge()).toBe(expectedAge);
  });

  it("should return age as integer", () => {
    const ik: Isikukood = new Isikukood("35703150220");
    expect(Number.isInteger(ik.getAge())).toBe(true);
  });
});

const getAge = (bd: Date): number => {
  const today: Date = new Date();
  let age: number = today.getFullYear() - bd.getFullYear();
  if (
    today.getMonth() < bd.getMonth() ||
    (today.getMonth() == bd.getMonth() && today.getDate() < bd.getDate())
  ) {
    age--;
  }
  return age;
};