// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.

import { mount, shallowMount } from '@vue/test-utils';
import * as sinon from 'sinon';
import Pagination from '@/components/common/Pagination.vue';

describe('Pagination.vue', () => {
    it('renders correctly', () => {
        const wrapper = shallowMount(Pagination);

        expect(wrapper).toMatchSnapshot();
    });

    it('renders correctly with props', () => {
        const wrapper = shallowMount(Pagination, {
            propsData: {
                totalPageCount: 10,
                onPageClickCallback: () => new Promise(() => false)
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 2
                    }
                },
                $router: {
                    replace: () => false
                }
            }
        });

        expect(wrapper).toMatchSnapshot();
    });

    it('inits correctly with totalPageCount equals 10 and current pageNumber in first block', () => {
        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 10,
                onPageClickCallback: () => new Promise(() => false)
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 2
                    }
                },
                $router: {
                    replace: () => false
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        expect(wrapperData.currentPageNumber).toBe(2);
        expect(wrapperData.pagesArray.length).toBe(10);
        expect(wrapperData.firstBlockPages.length).toBe(3);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(1);
        expect(wrapper.findAll('span').at(1).classes().includes('selected')).toBe(true);
    });

    it('inits correctly with totalPageCount equals 10 and current pageNumber in middle block', () => {
        const wrapper = shallowMount(Pagination, {
            propsData: {
                totalPageCount: 12,
                onPageClickCallback: () => new Promise(() => false)
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 5
                    }
                },
                $router: {
                    replace: () => false
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        expect(wrapperData.currentPageNumber).toBe(5);
        expect(wrapperData.pagesArray.length).toBe(12);
        expect(wrapperData.firstBlockPages.length).toBe(1);
        expect(wrapperData.middleBlockPages.length).toBe(3);
        expect(wrapperData.lastBlockPages.length).toBe(1);
    });

    it('inits correctly with totalPageCount equals 10 and current pageNumber in last block', () => {
        const wrapper = shallowMount(Pagination, {
            propsData: {
                totalPageCount: 13,
                onPageClickCallback: () => new Promise(() => false)
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 12
                    }
                },
                $router: {
                    replace: () => false
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        expect(wrapperData.currentPageNumber).toBe(12);
        expect(wrapperData.pagesArray.length).toBe(13);
        expect(wrapperData.firstBlockPages.length).toBe(1);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(3);
    });

    it('inits correctly with totalPageCount equals 4 and no current pageNumber in query', () => {
        const wrapper = shallowMount(Pagination, {
            propsData: {
                totalPageCount: 4,
                onPageClickCallback: () => new Promise(() => false)
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: null
                    }
                },
                $router: {
                    replace: () => false
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        expect(wrapperData.currentPageNumber).toBe(1);
        expect(wrapperData.pagesArray.length).toBe(4);
        expect(wrapperData.firstBlockPages.length).toBe(4);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(0);
    });

    it('behaves correctly on page click', async () => {
        const routerReplaceSpy = sinon.spy();
        const callbackSpy = sinon.stub();

        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 9,
                onPageClickCallback: callbackSpy
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: null
                    }
                },
                $router: {
                    replace: routerReplaceSpy
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        wrapper.findAll('span').at(2).trigger('click');
        await expect(callbackSpy.callCount).toBe(1);

        expect(routerReplaceSpy.callCount).toBe(1);
        expect(wrapperData.currentPageNumber).toBe(3);
        expect(wrapperData.firstBlockPages.length).toBe(1);
        expect(wrapperData.middleBlockPages.length).toBe(3);
        expect(wrapperData.lastBlockPages.length).toBe(1);
    });

    it('behaves correctly on next page button click', async () => {
        const routerReplaceSpy = sinon.spy();
        const callbackSpy = sinon.stub();

        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 9,
                onPageClickCallback: callbackSpy
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: null
                    }
                },
                $router: {
                    replace: routerReplaceSpy
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        wrapper.findAll('.pagination-container__button').at(1).trigger('click');
        await expect(callbackSpy.callCount).toBe(1);

        expect(routerReplaceSpy.callCount).toBe(1);
        expect(wrapperData.currentPageNumber).toBe(2);
        expect(wrapperData.firstBlockPages.length).toBe(3);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(1);
    });

    it('behaves correctly on previous page button click', async () => {
        const routerReplaceSpy = sinon.spy();
        const callbackSpy = sinon.stub();

        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 9,
                onPageClickCallback: callbackSpy
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 8
                    }
                },
                $router: {
                    replace: routerReplaceSpy
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        wrapper.findAll('.pagination-container__button').at(0).trigger('click');
        await expect(callbackSpy.callCount).toBe(1);

        expect(routerReplaceSpy.callCount).toBe(2);
        expect(wrapperData.currentPageNumber).toBe(7);
        expect(wrapperData.firstBlockPages.length).toBe(1);
        expect(wrapperData.middleBlockPages.length).toBe(3);
        expect(wrapperData.lastBlockPages.length).toBe(1);
    });

    it('behaves correctly on previous page button click when current is 1', async () => {
        const routerReplaceSpy = sinon.spy();
        const callbackSpy = sinon.stub();

        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 9,
                onPageClickCallback: callbackSpy
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: null
                    }
                },
                $router: {
                    replace: routerReplaceSpy
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        wrapper.findAll('.pagination-container__button').at(0).trigger('click');
        await expect(callbackSpy.callCount).toBe(0);

        expect(routerReplaceSpy.callCount).toBe(0);
        expect(wrapperData.currentPageNumber).toBe(1);
        expect(wrapperData.firstBlockPages.length).toBe(3);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(1);
    });

    it('behaves correctly on next page button click when current is last', async () => {
        const routerReplaceSpy = sinon.spy();
        const callbackSpy = sinon.stub();

        const wrapper = mount(Pagination, {
            propsData: {
                totalPageCount: 9,
                onPageClickCallback: callbackSpy
            },
            mocks: {
                $route: {
                    query: {
                        pageNumber: 9
                    }
                },
                $router: {
                    replace: routerReplaceSpy
                }
            }
        });

        const wrapperData = wrapper.vm.$data;

        wrapper.findAll('.pagination-container__button').at(1).trigger('click');
        await expect(callbackSpy.callCount).toBe(0);

        expect(routerReplaceSpy.callCount).toBe(1);
        expect(wrapperData.currentPageNumber).toBe(9);
        expect(wrapperData.firstBlockPages.length).toBe(1);
        expect(wrapperData.middleBlockPages.length).toBe(0);
        expect(wrapperData.lastBlockPages.length).toBe(3);
    });
});