import * as cp from 'child_process'
import * as path from 'path'
import { expect } from 'chai'
import { BrowserWindow, globalShortcut, Menu, MenuItem } from 'electron'
import { sortMenuItems } from '../lib/browser/api/menu-utils'
import { emittedOnce } from './events-helpers'
import { ifit } from './spec-helpers'
import { closeWindow } from './window-helpers'

const fixturesPath = path.resolve(__dirname, 'fixtures')

describe('Menu module', function () {
  this.timeout(5000)
  describe('Menu.buildFromTemplate', () => {
    it('should be able to attach extra fields', () => {
      const menu = Menu.buildFromTemplate([
        {
          label: 'text',
          extra: 'field'
        } as MenuItem | Record<string, any>
      ])
      expect((menu.items[0] as any).extra).to.equal('field')
    })

    it('should be able to accept only MenuItems', () => {
      const menu = Menu.buildFromTemplate([
        new MenuItem({ label: 'one' }),
        new MenuItem({ label: 'two' })
      ])
      expect(menu.items[0].label).to.equal('one')
      expect(menu.items[1].label).to.equal('two')
    })

    it('should be able to accept only MenuItems in a submenu', () => {
      const menu = Menu.buildFromTemplate([
        {
          label: 'one',
          submenu: [
            new MenuItem({ label: 'two' }) as any
          ]
        }
      ])
      expect(menu.items[0].label).to.equal('one')
      expect(menu.items[0].submenu!.items[0].label).to.equal('two')
    })

    it('should be able to accept MenuItems and plain objects', () => {
      const menu = Menu.buildFromTemplate([
        new MenuItem({ label: 'one' }),
        { label: 'two' }
      ])
      expect(menu.items[0].label).to.equal('one')
      expect(menu.items[1].label).to.equal('two')
    })

    it('does not modify the specified template', () => {
      const template = [{ label: 'text', submenu: [{ label: 'sub' }] }]
      const templateCopy = JSON.parse(JSON.stringify(template))
      Menu.buildFromTemplate(template)
      expect(template).to.deep.equal(templateCopy)
    })

    it('does not throw exceptions for undefined/null values', () => {
      expect(() => {
        Menu.buildFromTemplate([
          {
            label: 'text',
            accelerator: undefined
          },
          {
            label: 'text again',
            accelerator: null as any
          }
        ])
      }).to.not.throw()
    })

    it('does throw exceptions for empty objects and null values', () => {
      expect(() => {
        Menu.buildFromTemplate([{}, null as any])
      }).to.throw(/Invalid template for MenuItem: must have at least one of label, role or type/)
    })

    it('does throw exception for object without role, label, or type attribute', () => {
      expect(() => {
        Menu.buildFromTemplate([{ 'visible': true }])
      }).to.throw(/Invalid template for MenuItem: must have at least one of label, role or type/)
    })
    it('does throw exception for undefined', () => {
      expect(() => {
        Menu.buildFromTemplate([undefined as any])
      }).to.throw(/Invalid template for MenuItem: must have at least one of label, role or type/)
    })

    it('throws when an non-array is passed as a template', () => {
      expect(() => {
        Menu.buildFromTemplate('hello' as any);
      }).to.throw(/Invalid template for Menu: Menu template must be an array/);
    });

    describe('Menu sorting and building', () => {
      describe('sorts groups', () => {
        it('does a simple sort', () => {
          const items = [
            {
              label: 'two',
              id: '2',
              afterGroupContaining: ['1'] },
            { type: 'separator' },
            {
              id: '1',
              label: 'one'
            }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two',
              afterGroupContaining: ['1']
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('does a simple sort with MenuItems', () => {
          const firstItem = new MenuItem({ id: '1', label: 'one' })
          const secondItem = new MenuItem({
            label: 'two',
            id: '2',
            afterGroupContaining: ['1']
          })
          const sep = new MenuItem({ type: 'separator' })

          const items = [ secondItem, sep, firstItem ]
          const expected = [ firstItem, sep, secondItem ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('resolves cycles by ignoring things that conflict', () => {
          const items = [
            {
              id: '2',
              label: 'two',
              afterGroupContaining: ['1']
            },
            { type: 'separator' },
            {
              id: '1',
              label: 'one',
              afterGroupContaining: ['2']
            }
          ]

          const expected = [
            {
              id: '1',
              label: 'one',
              afterGroupContaining: ['2']
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two',
              afterGroupContaining: ['1']
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('ignores references to commands that do not exist', () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two',
              afterGroupContaining: ['does-not-exist']
            }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two',
              afterGroupContaining: ['does-not-exist']
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('only respects the first matching [before|after]GroupContaining rule in a given group', () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              beforeGroupContaining: ['1']
            },
            {
              id: '4',
              label: 'four',
              afterGroupContaining: ['2']
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            }
          ]

          const expected = [
            {
              id: '3',
              label: 'three',
              beforeGroupContaining: ['1']
            },
            {
              id: '4',
              label: 'four',
              afterGroupContaining: ['2']
            },
            { type: 'separator' },
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })
      })

      describe('moves an item to a different group by merging groups', () => {
        it('can move a group of one item', () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              after: ['1']
            },
            { type: 'separator' }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            {
              id: '3',
              label: 'three',
              after: ['1']
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it("moves all items in the moving item's group", () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              after: ['1']
            },
            {
              id: '4',
              label: 'four'
            },
            { type: 'separator' }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            {
              id: '3',
              label: 'three',
              after: ['1']
            },
            {
              id: '4',
              label: 'four'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it("ignores positions relative to commands that don't exist", () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              after: ['does-not-exist']
            },
            {
              id: '4',
              label: 'four',
              after: ['1']
            },
            { type: 'separator' }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            {
              id: '3',
              label: 'three',
              after: ['does-not-exist']
            },
            {
              id: '4',
              label: 'four',
              after: ['1']
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('can handle recursive group merging', () => {
          const items = [
            {
              id: '1',
              label: 'one',
              after: ['3']
            },
            {
              id: '2',
              label: 'two',
              before: ['1']
            },
            {
              id: '3',
              label: 'three'
            }
          ]

          const expected = [
            {
              id: '3',
              label: 'three'
            },
            {
              id: '2',
              label: 'two',
              before: ['1']
            },
            {
              id: '1',
              label: 'one',
              after: ['3']
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('can merge multiple groups when given a list of before/after commands', () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              after: ['1', '2']
            }
          ]

          const expected = [
            {
              id: '2',
              label: 'two'
            },
            {
              id: '1',
              label: 'one'
            },
            {
              id: '3',
              label: 'three',
              after: ['1', '2']
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })

        it('can merge multiple groups based on both before/after commands', () => {
          const items = [
            {
              id: '1',
              label: 'one'
            },
            { type: 'separator' },
            {
              id: '2',
              label: 'two'
            },
            { type: 'separator' },
            {
              id: '3',
              label: 'three',
              after: ['1'],
              before: ['2']
            }
          ]

          const expected = [
            {
              id: '1',
              label: 'one'
            },
            {
              id: '3',
              label: 'three',
              after: ['1'],
              before: ['2']
            },
            {
              id: '2',
              label: 'two'
            }
          ]

          expect(sortMenuItems(items)).to.deep.equal(expected)
        })
      })

      it('should position before existing item', () => {
        const menu = Menu.buildFromTemplate([
          {
            id: '2',
            label: 'two'
          }, {
            id: '3',
            label: 'three'
          }, {
            id: '1',
            label: 'one',
            before: ['2']
          }
        ])

        expect(menu.items[0].label).to.equal('one')
        expect(menu.items[1].label).to.equal('two')
        expect(menu.items[2].label).to.equal('three')
      })

      it('should position after existing item', () => {
        const menu = Menu.buildFromTemplate([
          {
            id: '2',
            label: 'two',
            after: ['1']
          },
          {
            id: '1',
            label: 'one'
          }, {
            id: '3',
            label: 'three'
          }
        ])

        expect(menu.items[0].label).to.equal('one')
        expect(menu.items[1].label).to.equal('two')
        expect(menu.items[2].label).to.equal('three')
      })

      it('should filter excess menu separators', () => {
        const menuOne = Menu.buildFromTemplate([
          {
            type: 'separator'
          }, {
            label: 'a'
          }, {
            label: 'b'
          }, {
            label: 'c'
          }, {
            type: 'separator'
          }
        ])

        expect(menuOne.items).to.have.length(3)
        expect(menuOne.items[0].label).to.equal('a')
        expect(menuOne.items[1].label).to.equal('b')
        expect(menuOne.items[2].label).to.equal('c')

        const menuTwo = Menu.buildFromTemplate([
          {
            type: 'separator'
          }, {
            type: 'separator'
          }, {
            label: 'a'
          }, {
            label: 'b'
          }, {
            label: 'c'
          }, {
            type: 'separator'
          }, {
            type: 'separator'
          }
        ])

        expect(menuTwo.items).to.have.length(3)
        expect(menuTwo.items[0].label).to.equal('a')
        expect(menuTwo.items[1].label).to.equal('b')
        expect(menuTwo.items[2].label).to.equal('c')
      })

      it('should continue inserting items at next index when no specifier is present', () => {
        const menu = Menu.buildFromTemplate([
          {
            id: '2',
            label: 'two'
          }, {
            id: '3',
            label: 'three'
          }, {
            id: '4',
            label: 'four'
          }, {
            id: '5',
            label: 'five'
          }, {
            id: '1',
            label: 'one',
            before: ['2']
          }
        ])

        expect(menu.items[0].label).to.equal('one')
        expect(menu.items[1].label).to.equal('two')
        expect(menu.items[2].label).to.equal('three')
        expect(menu.items[3].label).to.equal('four')
        expect(menu.items[4].label).to.equal('five')
      })

      it('should continue inserting MenuItems at next index when no specifier is present', () => {
        const menu = Menu.buildFromTemplate([
          new MenuItem({
            id: '2',
            label: 'two'
          }), new MenuItem({
            id: '3',
            label: 'three'
          }), new MenuItem({
            id: '4',
            label: 'four'
          }), new MenuItem({
            id: '5',
            label: 'five'
          }), new MenuItem({
            id: '1',
            label: 'one',
            before: ['2']
          })
        ])

        expect(menu.items[0].label).to.equal('one')
        expect(menu.items[1].label).to.equal('two')
        expect(menu.items[2].label).to.equal('three')
        expect(menu.items[3].label).to.equal('four')
        expect(menu.items[4].label).to.equal('five')
      })
    })
  })

  describe('Menu.getMenuItemById', () => {
    it('should return the item with the given id', () => {
      const menu = Menu.buildFromTemplate([
        {
          label: 'View',
          submenu: [
            {
              label: 'Enter Fullscreen',
              accelerator: 'ControlCommandF',
              id: 'fullScreen'
            }
          ]
        }
      ])
      const fsc = menu.getMenuItemById('fullScreen')
      expect(menu.items[0].submenu!.items[0]).to.equal(fsc)
    })

    it('should return the separator with the given id', () => {
      const menu = Menu.buildFromTemplate([
        {
          label: 'Item 1',
          id: 'item_1'
        },
        {
          id: 'separator',
          type: 'separator'
        },
        {
          label: 'Item 2',
          id: 'item_2'
        }
      ])
      const separator = menu.getMenuItemById('separator')
      expect(separator).to.be.an('object')
      expect(separator).to.equal(menu.items[1])
    })
  })

  describe('Menu.insert', () => {
    it('should throw when attempting to insert at out-of-range indices', () => {
      const menu = Menu.buildFromTemplate([
        { label: '1' },
        { label: '2' },
        { label: '3' }
      ])

      const item = new MenuItem({ label: 'badInsert' })

      expect(() => {
        menu.insert(9999, item)
      }).to.throw(/Position 9999 cannot be greater than the total MenuItem count/)

      expect(() => {
        menu.insert(-9999, item)
      }).to.throw(/Position -9999 cannot be less than 0/)
    })

    it('should store item in @items by its index', () => {
      const menu = Menu.buildFromTemplate([
        { label: '1' },
        { label: '2' },
        { label: '3' }
      ])

      const item = new MenuItem({ label: 'inserted' })

      menu.insert(1, item)
      expect(menu.items[0].label).to.equal('1')
      expect(menu.items[1].label).to.equal('inserted')
      expect(menu.items[2].label).to.equal('2')
      expect(menu.items[3].label).to.equal('3')
    })
  })

  describe('Menu.append', () => {
    it('should add the item to the end of the menu', () => {
      const menu = Menu.buildFromTemplate([
        { label: '1' },
        { label: '2' },
        { label: '3' }
      ])

      const item = new MenuItem({ label: 'inserted' })
      menu.append(item)

      expect(menu.items[0].label).to.equal('1')
      expect(menu.items[1].label).to.equal('2')
      expect(menu.items[2].label).to.equal('3')
      expect(menu.items[3].label).to.equal('inserted')
    })
  })

  describe('Menu.popup', () => {
    let w: BrowserWindow
    let menu: Menu

    beforeEach(() => {
      w = new BrowserWindow({ show: false, width: 200, height: 200 })
      menu = Menu.buildFromTemplate([
        { label: '1' },
        { label: '2' },
        { label: '3' }
      ])
    })

    afterEach(async () => {
      menu.closePopup()
      menu.closePopup(w)
      await closeWindow(w)
      w = null as unknown as BrowserWindow
    })

    it('throws an error if options is not an object', () => {
      expect(() => {
        menu.popup('this is a string, not an object' as any)
      }).to.throw(/Options must be an object/)
    })

    it('allows for options to be optional', () => {
      expect(() => {
        menu.popup({})
      }).to.not.throw()
    })

    it('should emit menu-will-show event', (done) => {
      menu.on('menu-will-show', () => { done() })
      menu.popup({ window: w })
    })

    it('should emit menu-will-close event', (done) => {
      menu.on('menu-will-close', () => { done() })
      menu.popup({ window: w })
      // https://github.com/electron/electron/issues/19411
      setTimeout(() => {
        menu.closePopup()
      })
    })

    it('returns immediately', () => {
      const input = { window: w, x: 100, y: 101 }
      const output = menu.popup(input) as unknown as {x: number, y: number, browserWindow: BrowserWindow}
      expect(output.x).to.equal(input.x)
      expect(output.y).to.equal(input.y)
      expect(output.browserWindow).to.equal(input.window)
    })

    it('works without a given BrowserWindow and options', () => {
      const { browserWindow, x, y } = menu.popup({ x: 100, y: 101 }) as unknown as {x: number, y: number, browserWindow: BrowserWindow}

      expect(browserWindow.constructor.name).to.equal('BrowserWindow')
      expect(x).to.equal(100)
      expect(y).to.equal(101)
    })

    it('works with a given BrowserWindow, options and callback', (done) => {
      const { x, y } = menu.popup({
        window: w,
        x: 100,
        y: 101,
        callback: () => done()
      }) as unknown as {x: number, y: number}

      expect(x).to.equal(100)
      expect(y).to.equal(101)
      // https://github.com/electron/electron/issues/19411
      setTimeout(() => {
        menu.closePopup()
      })
    })

    it('works with a given BrowserWindow, no options, and a callback', (done) => {
      menu.popup({ window: w, callback: () => done() })
      // https://github.com/electron/electron/issues/19411
      setTimeout(() => {
        menu.closePopup()
      })
    })

    it('prevents menu from getting garbage-collected when popuping', (done) => {
      let menu = Menu.buildFromTemplate([{role: 'paste'}])
      menu.popup({ window: w })

      // Keep a weak reference to the menu.
      const v8Util = process.electronBinding('v8_util')
      const map = (v8Util as any).createIDWeakMap() as any
      map.set(0, menu)

      setTimeout(() => {
        // Do garbage collection, since |menu| is not referenced in this closure
        // it would be gone after next call.
        v8Util.requestGarbageCollectionForTesting()
        setTimeout(() => {
          // Try to receive menu from weak reference.
          if (map.has(0)) {
            map.get(0).closePopup()
            done()
          } else {
            done('Menu is garbage-collected while popuping')
          }
        })
      })
    })
  })

  describe('Menu.setApplicationMenu', () => {
    it('sets a menu', () => {
      const menu = Menu.buildFromTemplate([
        { label: '1' },
        { label: '2' }
      ])

      Menu.setApplicationMenu(menu)
      expect(Menu.getApplicationMenu()).to.not.be.null('application menu')
    })

    it('unsets a menu with null', () => {
      Menu.setApplicationMenu(null)
      expect(Menu.getApplicationMenu()).to.be.null('application menu')
    })

    ifit(process.platform !== 'darwin')('does not override menu visibility on startup', async () => {
      const appPath = path.join(fixturesPath, 'api', 'test-menu-visibility')
      const appProcess = cp.spawn(process.execPath, [appPath])

      let output = ''
      appProcess.stdout.on('data', data => { output += data })

      await emittedOnce(appProcess, 'close')
      expect(output).to.include('Window has no menu')
    })

    ifit(process.platform !== 'darwin')('does not override null menu on startup', async () => {
      const appPath = path.join(fixturesPath, 'api', 'test-menu-null')
      const appProcess = cp.spawn(process.execPath, [appPath])

      let output = ''
      appProcess.stdout.on('data', data => { output += data })

      await emittedOnce(appProcess, 'close')
      expect(output).to.include('Window has no menu')
    })
  })

  describe('menu accelerators', async () => {
    const sendRobotjsKey = (key: string, modifiers: string | string[] = [], delay = 500) => {
      return new Promise((resolve, reject) => {
        try {
          require('robotjs').keyTap(key, modifiers)
          setTimeout(() => {
            resolve()
          }, delay)
        } catch (e) {
          reject(e)
        }
      })
    }

    before(async function () {
      // --ci flag breaks accelerator and robotjs interaction
      if (isCI) {
        this.skip()
      }

      // before accelerator tests, use globalShortcut to test if
      // RobotJS is working at all
      let isKeyPressed = false
      globalShortcut.register('q', () => {
        isKeyPressed = true
      })
      try {
        await sendRobotjsKey('q')
      } catch (e) {
        this.skip()
      }

      if (!isKeyPressed) {
        this.skip()
      }

      globalShortcut.unregister('q')
    })

    it('should perform the specified action', async () => {
      let hasBeenClicked = false
      const menu = Menu.buildFromTemplate([
        {
          label: 'Test',
          submenu: [
            {
              label: 'Test Item',
              accelerator: 'T',
              click: (a, b, event) => {
                hasBeenClicked = true
                expect(event).to.deep.equal({
                  shiftKey: false,
                  ctrlKey: false,
                  altKey: false,
                  metaKey: false,
                  triggeredByAccelerator: true
                })
              },
              id: 'test'
            }
          ]
        }
      ])
      Menu.setApplicationMenu(menu)
      expect(Menu.getApplicationMenu()).to.not.be.null('application menu')
      await sendRobotjsKey('t')
      expect(hasBeenClicked).to.equal(true)
    })

    it('should not activate upon clicking another key combination', async () => {
      let hasBeenClicked = false
      const menu = Menu.buildFromTemplate([
        {
          label: 'Test',
          submenu: [
            {
              label: 'Test Item',
              accelerator: 'T',
              click: (a, b, event) => {
                hasBeenClicked = true
              },
              id: 'test'
            }
          ]
        }
      ])
      Menu.setApplicationMenu(menu)
      expect(Menu.getApplicationMenu()).to.not.be.null('application menu')
      await sendRobotjsKey('t', 'shift')
      expect(hasBeenClicked).to.equal(false)
    })
  })
})
