import { describe, test, expect } from '@jest/globals'
import FileGraph from '../fileGraph.js'
import FileNode from '../fileNode.js'
import { FileObject } from '../file.js'

describe('FileGraph', () => {
  let root: FileNode

  beforeEach(() => {
    root = new FileNode({
      path: '/',
      type: 'directory',
      discovered: true,
    })
  })

  test('add files to graph', () => {
    const fileGraph = new FileGraph(root)

    const filesToAdd: FileObject[] = [
      {
        path: '/home/user/file1.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder2/file2.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.add(filesToAdd)

    expect(fileGraph.children.length).toBe(1)
    expect(fileGraph.children[0].children[0].children.length).toBe(3)
  })

  test('ignore files that already exist', () => {
    const fileGraph = new FileGraph(root)

    const filesToAdd: FileObject[] = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.add(filesToAdd)

    expect(fileGraph.children.length).toBe(1)
    expect(fileGraph.children[0].children[0].children.length).toBe(1)

    fileGraph.add([filesToAdd[1]])

    expect(fileGraph.children.length).toBe(1)
    expect(fileGraph.children[0].children[0].children.length).toBe(1)
  })

  test('remove files from graph', () => {
    const fileGraph = new FileGraph(root)

    const filesToAdd = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder2',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder2/file2.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.add(filesToAdd as FileObject[])

    const filesToRemove = [
      {
        path: '/home/user/folder1/file1.txt',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder2',
        type: 'directory',
        discovered: true,
      },
    ]

    fileGraph.remove(filesToRemove as FileObject[])

    expect(fileGraph.children[0].children[0].children.length).toBe(1)
    expect(fileGraph.children[0].children[0].children[0].name).toBe('folder1')
    expect(fileGraph.children[0].children[0].children[0].children.length).toBe(
      0
    )
  })

  test('discover', () => {
    const fileGraph = new FileGraph(root)
    const discoverFiles = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file2.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file3.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.discover(discoverFiles as FileObject[])
    expect(fileGraph.children[0].children[0].children[0].children.length).toBe(
      3
    )
  })

  test('discover new files', () => {
    const fileGraph = new FileGraph(root)

    const filesToAdd = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder2',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder2/file2.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.add(filesToAdd as FileObject[])

    const newFiles = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file2.txt',
        type: 'file',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file3.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.discover(newFiles as FileObject[])

    expect(fileGraph.children[0].children[0].children.length).toBe(2)
    expect(fileGraph.children[0].children[0].children[0].children.length).toBe(
      3
    )
  })

  test('discover a empty directory which children just being deleted', () => {
    const fileGraph = new FileGraph(root)
    const discoverFiles = [
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
      },
      {
        path: '/home/user/folder1/file1.txt',
        type: 'file',
        discovered: true,
      },
    ]

    fileGraph.add(discoverFiles as FileObject[])
    expect(fileGraph.include('/home/user/folder1/file1.txt', 'file')).toBe(true)

    fileGraph.discover([
      {
        path: '/home/user/folder1',
        type: 'directory',
        discovered: true,
        empty: true,
      },
    ])

    expect(fileGraph.include('/home/user/folder1/file1.txt', 'file')).toBe(
      false
    )
  })
})