import React from 'react';
import sinon from 'sinon';
import { shallow } from 'enzyme';

import SizePerPageDropDown from '../src/size-per-page-dropdown';
import PaginationList from '../src/pagination-list';
import Pagination from '../src/pagination';

describe('Pagination', () => {
  let wrapper;
  let instance;

  const createMockProps = props => ({
    dataSize: 100,
    sizePerPageList: [10, 20, 30, 50],
    currPage: 1,
    currSizePerPage: 10,
    pageStartIndex: 1,
    paginationSize: 5,
    withFirstAndLast: true,
    firstPageText: '<<',
    prePageText: '<',
    nextPageText: '>',
    lastPageText: '>>',
    alwaysShowAllBtns: false,
    onPageChange: sinon.stub(),
    onSizePerPageChange: sinon.stub(),
    hidePageListOnlyOnePage: false,
    hideSizePerPage: false,
    ...props
  });

  describe('default pagiantion', () => {
    const props = createMockProps();

    beforeEach(() => {
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should rendering correctly', () => {
      expect(wrapper.length).toBe(1);
      expect(wrapper.hasClass('react-bootstrap-table-pagination')).toBeTruthy();
      expect(wrapper.find('.react-bootstrap-table-pagination-list-hidden').length).toBe(0);
    });

    it('should having correct state', () => {
      expect(instance.state).toBeDefined();
      expect(instance.state.totalPages).toEqual(instance.calculateTotalPage());
      expect(instance.state.lastPage).toEqual(
        instance.calculateLastPage(instance.state.totalPages));
      expect(instance.state.dropdownOpen).toBeFalsy();
    });

    it('should rendering PaginationList component successfully', () => {
      const paginationList = wrapper.find(PaginationList);
      expect(paginationList.length).toBe(1);
      expect(paginationList.prop('pages')).toEqual(instance.calculatePageStatus(instance.calculatePages()));
      expect(paginationList.prop('onPageChange')).toEqual(instance.handleChangePage);
    });

    it('should rendering SizePerPageDropDown component successfully', () => {
      const sizePerPageDropDown = wrapper.find(SizePerPageDropDown);
      expect(sizePerPageDropDown.length).toBe(1);

      expect(sizePerPageDropDown.prop('currSizePerPage')).toEqual(`${props.currSizePerPage}`);
      expect(sizePerPageDropDown.prop('options')).toEqual(instance.calculateSizePerPageStatus());
      expect(sizePerPageDropDown.prop('onSizePerPageChange')).toEqual(instance.handleChangeSizePerPage);
      expect(sizePerPageDropDown.prop('onClick')).toEqual(instance.toggleDropDown);
      expect(sizePerPageDropDown.prop('open')).toEqual(instance.state.dropdownOpen);
    });
  });

  describe('when props.sizePerPageList is empty array', () => {
    beforeEach(() => {
      const props = createMockProps({ sizePerPageList: [] });
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should not rendering SizePerPageDropDown component', () => {
      const sizePerPageDropDown = wrapper.find(SizePerPageDropDown);
      expect(sizePerPageDropDown.length).toBe(0);
    });
  });

  describe('when props.hideSizePerPage is true', () => {
    beforeEach(() => {
      const props = createMockProps({ hideSizePerPage: true });
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should not rendering SizePerPageDropDown component', () => {
      const sizePerPageDropDown = wrapper.find(SizePerPageDropDown);
      expect(sizePerPageDropDown.length).toBe(0);
    });
  });

  describe('when props.hidePageListOnlyOnePage is true', () => {
    beforeEach(() => {
      const props = createMockProps({ hidePageListOnlyOnePage: true, dataSize: 7 });
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should find react-bootstrap-table-pagination-list-hidden class when only one page', () => {
      expect(wrapper.find('.react-bootstrap-table-pagination-list-hidden').length).toBe(1);
    });
  });

  describe('componentWillReceiveProps', () => {
    describe('when next props.currSizePerPage is diff than current one', () => {
      const nextProps = createMockProps({ currSizePerPage: 20 });

      beforeEach(() => {
        wrapper = shallow(<Pagination { ...createMockProps() } />);
        instance = wrapper.instance();
      });

      it('should setting correct state.totalPages', () => {
        instance.componentWillReceiveProps(nextProps);
        expect(instance.state.totalPages).toEqual(
          instance.calculateTotalPage(nextProps.currSizePerPage));
      });

      it('should setting correct state.lastPage', () => {
        instance.componentWillReceiveProps(nextProps);
        const totalPages = instance.calculateTotalPage(nextProps.currSizePerPage);
        expect(instance.state.lastPage).toEqual(
          instance.calculateLastPage(totalPages));
      });
    });

    describe('when next props.dataSize is diff than current one', () => {
      const nextProps = createMockProps({ dataSize: 33 });

      beforeEach(() => {
        wrapper = shallow(<Pagination { ...createMockProps() } />);
        instance = wrapper.instance();
      });

      it('should setting correct state.totalPages', () => {
        instance.componentWillReceiveProps(nextProps);
        expect(instance.state.totalPages).toEqual(
          instance.calculateTotalPage(nextProps.currSizePerPage, nextProps.dataSize));
      });

      it('should setting correct state.lastPage', () => {
        instance.componentWillReceiveProps(nextProps);
        const totalPages = instance.calculateTotalPage(
          nextProps.currSizePerPage, nextProps.dataSize);
        expect(instance.state.lastPage).toEqual(
          instance.calculateLastPage(totalPages));
      });
    });
  });

  describe('toggleDropDown', () => {
    beforeEach(() => {
      const props = createMockProps();
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should setting state.dropdownOpen as true when it is false', () => {
      instance.toggleDropDown();
      expect(instance.state.dropdownOpen).toBeTruthy();
    });

    it('should setting state.dropdownOpen as false when it is true', () => {
      instance.toggleDropDown();
      instance.toggleDropDown();
      expect(instance.state.dropdownOpen).toBeFalsy();
    });
  });

  describe('closeDropDown', () => {
    beforeEach(() => {
      const props = createMockProps();
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should always setting state.dropdownOpen as false', () => {
      instance.closeDropDown();
      expect(instance.state.dropdownOpen).toBeFalsy();
      instance.closeDropDown();
      expect(instance.state.dropdownOpen).toBeFalsy();
    });
  });

  describe('handleChangeSizePerPage', () => {
    const props = createMockProps();

    beforeEach(() => {
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    it('should always setting state.dropdownOpen to false', () => {
      instance.handleChangeSizePerPage(10);
      expect(instance.state.dropdownOpen).toBeFalsy();
    });

    describe('when new sizePerPage is same as current one', () => {
      it('should not calling props.onSizePerPageChange callback', () => {
        instance.handleChangeSizePerPage(10);
        expect(props.onSizePerPageChange.callCount).toBe(0);
      });
    });

    describe('when new sizePerPage is diff than current one', () => {
      it('should not calling props.onSizePerPageChange callback', () => {
        instance.handleChangeSizePerPage(30);
        expect(props.onSizePerPageChange.callCount).toBe(1);
      });

      describe('and new current page is still in the new lagination list', () => {
        it('should calling props.onSizePerPageChange with correct argument', () => {
          expect(props.onSizePerPageChange.calledWith(30, props.currPage));
        });
      });

      describe('and new current page is still in the new lagination list', () => {
        beforeEach(() => {
          wrapper = shallow(<Pagination { ...createMockProps({ currPage: 10 }) } />);
          instance = wrapper.instance();
        });

        it('should calling props.onSizePerPageChange with correct argument', () => {
          expect(props.onSizePerPageChange.calledWith(30, 4));
        });
      });
    });
  });

  describe('handleChangePage', () => {
    const props = createMockProps();

    beforeEach(() => {
      props.currPage = 6;
      wrapper = shallow(<Pagination { ...props } />);
      instance = wrapper.instance();
    });

    afterEach(() => {
      props.onPageChange.reset();
    });

    it('should calling props.onPageChange correctly when new page is eq props.prePageText', () => {
      instance.handleChangePage(props.prePageText);
      expect(props.onPageChange.callCount).toBe(1);
      expect(props.onPageChange.calledWith(5)).toBeTruthy();
    });

    it('should calling props.onPageChange correctly when new page is eq props.nextPageText', () => {
      instance.handleChangePage(props.nextPageText);
      expect(props.onPageChange.callCount).toBe(1);
      expect(props.onPageChange.calledWith(7)).toBeTruthy();
    });

    it('should calling props.onPageChange correctly when new page is eq props.lastPageText', () => {
      instance.handleChangePage(props.lastPageText);
      expect(props.onPageChange.callCount).toBe(1);
      expect(props.onPageChange.calledWith(10)).toBeTruthy();
    });

    it('should calling props.onPageChange correctly when new page is eq props.firstPageText', () => {
      instance.handleChangePage(props.firstPageText);
      expect(props.onPageChange.callCount).toBe(1);
      expect(props.onPageChange.calledWith(props.pageStartIndex)).toBeTruthy();
    });

    it('should calling props.onPageChange correctly when new page is a numeric page', () => {
      const newPage = '8';
      instance.handleChangePage(newPage);
      expect(props.onPageChange.callCount).toBe(1);
      expect(props.onPageChange.calledWith(parseInt(newPage, 10))).toBeTruthy();
    });

    it('should not calling props.onPageChange correctly when page is not changed', () => {
      const newPage = props.currPage;
      instance.handleChangePage(newPage);
      expect(props.onPageChange.callCount).toBe(0);
    });
  });
});