import { expect } from 'chai'
import sinon from 'sinon'
import { shallowMount, mount, createWrapper } from '@vue/test-utils'
import { mutations } from '@/store'
import Vuex from 'vuex'
import Tabs from '@/components/Tabs.vue'

describe('Tabs.vue', () => {
  it('Renders start guide when there is no opened tabs', () => {
    // mock store state
    const state = {
      tabs: []
    }
    const store = new Vuex.Store({ state })

    // mount the component
    const wrapper = shallowMount(Tabs, { store })

    // check start-guide visibility
    expect(wrapper.find('#start-guide').isVisible()).to.equal(true)
  })

  it('Renders tabs', () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }
    const store = new Vuex.Store({ state })

    // mount the component
    const wrapper = shallowMount(Tabs, { store })

    // check start-guide visibility
    expect(wrapper.find('#start-guide').isVisible()).to.equal(false)

    // check tabs
    expect(wrapper.findAllComponents({ name: 'Tab' })).to.have.lengthOf(2)

    const firstTab = wrapper.findAll('.tab').at(0)
    expect(firstTab.text()).to.include('foo')
    expect(firstTab.find('.star').isVisible()).to.equal(false)
    expect(firstTab.classes()).to.not.include('tab-selected')

    const secondTab = wrapper.findAll('.tab').at(1)
    expect(secondTab.text()).to.include('Untitled')
    expect(secondTab.find('.star').isVisible()).to.equal(true)
    expect(secondTab.classes()).to.include('tab-selected')
  })

  it('Selects the tab on click', async () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = shallowMount(Tabs, { store })

    // click on the first tab
    const firstTab = wrapper.findAll('.tab').at(0)
    await firstTab.trigger('click')

    // check that first tab is the current now
    expect(firstTab.classes()).to.include('tab-selected')
    const secondTab = wrapper.findAll('.tab').at(1)
    expect(secondTab.classes()).to.not.include('tab-selected')
    expect(state.currentTabId).to.equal(1)
  })

  it("Deletes the tab on close if it's saved", async () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = mount(Tabs, { store, stubs: ['router-link'] })

    // click on the close icon of the first tab
    const firstTabCloseIcon = wrapper.findAll('.tab').at(0).find('.close-icon')
    await firstTabCloseIcon.trigger('click')

    // check that the only one tab left and it's opened
    expect(wrapper.findAllComponents({name: 'Tab'})).to.have.lengthOf(1)

    const firstTab = wrapper.findAll('.tab').at(0)
    expect(firstTab.text()).to.include('Untitled')
    expect(firstTab.find('.star').isVisible()).to.equal(true)
    expect(firstTab.classes()).to.include('tab-selected')
  })

  it("Doesn't delete tab on close if user cancel closing", async () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = mount(Tabs, { store, stubs: ['router-link'] })

    // click on the close icon of the second tab
    const secondTabCloseIcon = wrapper.findAll('.tab').at(1).find('.close-icon')
    await secondTabCloseIcon.trigger('click')

    // check that Close Tab dialog is visible
    const modal = wrapper.find('[data-modal="close-warn"]')
    expect(modal.exists()).to.equal(true)

    // find Cancel in the dialog
    const cancelBtn = wrapper
      .findAll('.dialog-buttons-container button').wrappers
      .find(button => button.text() === 'Cancel')

    // click Cancel in the dialog
    await cancelBtn.trigger('click')

    // check that tab is still opened
    expect(wrapper.findAllComponents({ name: 'Tab' })).to.have.lengthOf(2)

    // check that the dialog is closed
    expect(wrapper.find('[data-modal="close-warn"]').exists()).to.equal(false)
  })

  it('Closes without saving', async () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = mount(Tabs, { store, stubs: ['router-link'] })

    // click on the close icon of the second tab
    const secondTabCloseIcon = wrapper.findAll('.tab').at(1).find('.close-icon')
    await secondTabCloseIcon.trigger('click')

    // find 'Close without saving' in the dialog
    const closeBtn = wrapper
      .findAll('.dialog-buttons-container button').wrappers
      .find(button => button.text() === 'Close without saving')

    // click 'Close without saving' in the dialog
    await closeBtn.trigger('click')

    // check that tab is closed
    expect(wrapper.findAllComponents({ name: 'Tab' })).to.have.lengthOf(1)
    const firstTab = wrapper.findAll('.tab').at(0)
    expect(firstTab.text()).to.include('foo')
    expect(firstTab.find('.star').isVisible()).to.equal(false)
    expect(firstTab.classes()).to.include('tab-selected')

    // check that 'saveQuery' event was not emited
    const rootWrapper = createWrapper(wrapper.vm.$root)
    expect(rootWrapper.emitted('saveQuery')).to.equal(undefined)

    // check that the dialog is closed
    expect(wrapper.find('[data-modal="close-warn"]').exists()).to.equal(false)
  })

  it('Closes with saving', async () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = mount(Tabs, { store, stubs: ['router-link'] })

    // click on the close icon of the second tab
    const secondTabCloseIcon = wrapper.findAll('.tab').at(1).find('.close-icon')
    await secondTabCloseIcon.trigger('click')

    // find 'Save and close' in the dialog
    const closeBtn = wrapper
      .findAll('.dialog-buttons-container button').wrappers
      .find(button => button.text() === 'Save and close')

    // click 'Save and close' in the dialog
    await closeBtn.trigger('click')

    // pretend like saving is completed - trigger 'querySaved' on $root
    await wrapper.vm.$root.$emit('querySaved')

    // check that tab is closed
    expect(wrapper.findAllComponents({ name: 'Tab' })).to.have.lengthOf(1)
    const firstTab = wrapper.findAll('.tab').at(0)
    expect(firstTab.text()).to.include('foo')
    expect(firstTab.find('.star').isVisible()).to.equal(false)
    expect(firstTab.classes()).to.include('tab-selected')

    // check that 'saveQuery' event was emited
    const rootWrapper = createWrapper(wrapper.vm.$root)
    expect(rootWrapper.emitted('saveQuery')).to.have.lengthOf(1)

    // check that the dialog is closed
    expect(wrapper.find('[data-modal="close-warn"]').exists()).to.equal(false)
  })

  it('Prevents closing a tab of a browser if there is unsaved query', () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false },
        { id: 2, name: null, tempName: 'Untitled', query: '', chart: [], isUnsaved: true }
      ],
      currentTabId: 2
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = shallowMount(Tabs, { store })

    const event = new Event('beforeunload')
    sinon.spy(event, 'preventDefault')
    wrapper.vm.leavingSqliteviz(event)

    expect(event.preventDefault.calledOnce).to.equal(true)
  })

  it("Doesn't prevent closing a tab of a browser if there is unsaved query", () => {
    // mock store state
    const state = {
      tabs: [
        { id: 1, name: 'foo', query: 'select * from foo', chart: [], isUnsaved: false }
      ],
      currentTabId: 1
    }

    const store = new Vuex.Store({ state, mutations })

    // mount the component
    const wrapper = shallowMount(Tabs, { store })

    const event = new Event('beforeunload')
    sinon.spy(event, 'preventDefault')
    wrapper.vm.leavingSqliteviz(event)

    expect(event.preventDefault.calledOnce).to.equal(false)
  })
})