const backup = require('./backup');
const Constants = require('./constants');
const os = require('os');
const fsPromises = require('fs/promises');
const utils = require('./utils');
const shell = require('shelljs');

describe('Backup Tests', () => {
  
test('Timestamp string in ISO format', () => {
  console.log(backup.getTimeStampInISO())
  expect(backup.getTimeStampInISO()).toMatch(/(\d{4})-(\d{2})-(\d{2})T(\d{2})\-(\d{2})\-(\d{2})\.(\d{3})Z/)
});

test('Available Space in /appsmith-stacks volume in Bytes', () => {
  shell.exec = jest.fn((format) => '20');
  const res = expect(backup.getAvailableBackupSpaceInBytes())
  res.toBe(20)

});
it('Checkx the constant is 2 GB', () => {
  let size = 2 * 1024 * 1024 * 1024
  expect(Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES).toBe(size)
});
it('Should throw Error when the available size is below MIN_REQUIRED_DISK_SPACE_IN_BYTES', () => {
  let size = Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES - 1;
  expect(() => {backup.checkAvailableBackupSpace(size)}).toThrow('Not enough space avaliable at /appsmith-stacks. Please ensure availability of atleast 2GB to backup successfully.');
});

it('Should not hould throw Error when the available size is >= MIN_REQUIRED_DISK_SPACE_IN_BYTES', () => {
  expect(() => {backup.checkAvailableBackupSpace(Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES)}).not.toThrow('Not enough space avaliable at /appsmith-stacks. Please ensure availability of atleast 5GB to backup successfully.');
});

it('Generates t', async () => {
  os.tmpdir =  jest.fn().mockReturnValue('temp/dir');
  fsPromises.mkdtemp =  jest.fn().mockImplementation((a) => a);
  backup.generateBackupRootPath().then((response)=>{console.log(response)})
  const res = await backup.generateBackupRootPath()
  expect(res).toBe('temp/dir/appsmithctl-backup-')
});

test('Test backup contents path generation', () => {
  var root = '/rootDir'
  var timestamp = '0000-00-0T00-00-00.00Z'
  expect(backup.getBackupContentsPath(root, timestamp)).toBe('/rootDir/appsmith-backup-0000-00-0T00-00-00.00Z')
});

test('Test mongodump CMD generaton', async () => {
  var dest = '/dest'
  var appsmithMongoURI = 'mongodb://username:password@host/appsmith'
  var cmd = 'mongodump --uri=mongodb://username:password@host/appsmith --archive=/dest/mongodb-data.gz --gzip'
  utils.execCommand =  jest.fn().mockImplementation(async (a) => a.join(' '));
  const res = await backup.executeMongoDumpCMD(dest, appsmithMongoURI)
  expect(res).toBe(cmd)
  console.log(res)
})

test('Test get gitRoot path when APPSMITH_GIT_ROOT is \'\' ', () => {
  expect(backup.getGitRoot('')).toBe('/appsmith-stacks/git-storage')
});

test('Test get gitRoot path when APPSMITH_GIT_ROOT is null ', () => {
  expect(backup.getGitRoot()).toBe('/appsmith-stacks/git-storage')
});

test('Test get gitRoot path when APPSMITH_GIT_ROOT is defined ', () => {
  expect(backup.getGitRoot('/my/git/storage')).toBe('/my/git/storage')
});

test('Test ln command generation', async () => {
  var gitRoot = '/appsmith-stacks/git-storage'
  var dest = '/destdir'
  var cmd = 'ln -s /appsmith-stacks/git-storage /destdir/git-storage'
  utils.execCommand =  jest.fn().mockImplementation(async (a) => a.join(' '));
  const res = await backup.executeCopyCMD(gitRoot, dest)
  expect(res).toBe(cmd)
  console.log(res)
})

it('Checks for the current Appsmith Version.', async () => {
  
  fsPromises.readFile =  jest.fn().mockImplementation(async (a) => 
  `Object.defineProperty(exports, "__esModule", { value: true });
  exports.VERSION = void 0;
  exports.VERSION = "v0.0.0-SNAPSHOT";`);
  const res = await utils.getCurrentAppsmithVersion()
  expect(res).toBe("v0.0.0-SNAPSHOT")
  console.log(res)
})

test('If Encryption env values are being removed', () => {
  expect(backup.removeSensitiveEnvData(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_ENCRYPTION_PASSWORD=dummy-pass\nAPPSMITH_ENCRYPTION_SALT=dummy-salt\nAPPSMITH_INSTANCE_NAME=Appsmith\n
  `)).toMatch(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_INSTANCE_NAME=Appsmith\n`)
});

test('If MONGODB env values are being removed', () => {
  expect(backup.removeSensitiveEnvData(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_MONGODB_URI=mongodb://appsmith:pass@localhost:27017/appsmith\nAPPSMITH_MONGODB_USER=appsmith\nAPPSMITH_MONGODB_PASSWORD=pass\nAPPSMITH_INSTANCE_NAME=Appsmith\n
  `)).toMatch(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_INSTANCE_NAME=Appsmith\n`)
});

test('If MONGODB and Encryption env values are being removed', () => {
  expect(backup.removeSensitiveEnvData(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_ENCRYPTION_PASSWORD=dummy-pass\nAPPSMITH_ENCRYPTION_SALT=dummy-salt\nAPPSMITH_MONGODB_URI=mongodb://appsmith:pass@localhost:27017/appsmith\nAPPSMITH_MONGODB_USER=appsmith\nAPPSMITH_MONGODB_PASSWORD=pass\nAPPSMITH_INSTANCE_NAME=Appsmith\n
  `)).toMatch(`APPSMITH_REDIS_URL=redis://127.0.0.1:6379\nAPPSMITH_INSTANCE_NAME=Appsmith\n`)
});


test('Backup Archive Limit when env APPSMITH_BACKUP_ARCHIVE_LIMIT is null', () => {
  expect(backup.getBackupArchiveLimit()).toBe(4)
});

test('Backup Archive Limit when env APPSMITH_BACKUP_ARCHIVE_LIMIT is 5', () => {
  expect(backup.getBackupArchiveLimit(5)).toBe(5)
});


test('Cleanup Backups when limit is 4 and there are 5 files', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1','file2','file3','file4','file5']
  var expectedBackupFiles =  ['file2','file3','file4','file5']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)

  expect(res).toEqual(expectedBackupFiles)
})

test('Cleanup Backups when limit is 2 and there are 5 files', async () => {
  const backupArchivesLimit = 2;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1','file2','file3','file4','file5']
  var expectedBackupFiles =  ['file4','file5']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)

  expect(res).toEqual(expectedBackupFiles)
})

test('Cleanup Backups when limit is 4 and there are 4 files', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1','file2','file3','file4']
  var expectedBackupFiles = ['file1','file2','file3','file4']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)

  expect(res).toEqual(expectedBackupFiles)
})

test('Cleanup Backups when limit is 4 and there are 2 files', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1','file2']
  var expectedBackupFiles = ['file1','file2']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)

  expect(res).toEqual(expectedBackupFiles)
})


test('Cleanup Backups when limit is 4 and there are 2 files', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1','file2']
  var expectedBackupFiles = ['file1','file2']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)
  expect(res).toEqual(expectedBackupFiles)
})


test('Cleanup Backups when limit is 2 and there is 1 file', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = ['file1']
  var expectedBackupFiles = ['file1']
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)
  expect(res).toEqual(expectedBackupFiles)
})

test('Cleanup Backups when limit is 2 and there is no file', async () => {
  const backupArchivesLimit = 4;
  fsPromises.rm = jest.fn().mockImplementation(async (a) => console.log(a));
  var backupFiles = []
  var expectedBackupFiles = []
  const res = await backup.removeOldBackups(backupFiles,backupArchivesLimit)
  console.log(res)
  expect(res).toEqual(expectedBackupFiles)
})
});