/* eslint-disable
    camelcase,
    handle-callback-err,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
let ProjectManager
const RedisManager = require('./RedisManager')
const ProjectHistoryRedisManager = require('./ProjectHistoryRedisManager')
const DocumentManager = require('./DocumentManager')
const HistoryManager = require('./HistoryManager')
const async = require('async')
const logger = require('logger-sharelatex')
const Metrics = require('./Metrics')
const Errors = require('./Errors')

module.exports = ProjectManager = {
  flushProjectWithLocks(project_id, _callback) {
    if (_callback == null) {
      _callback = function (error) {}
    }
    const timer = new Metrics.Timer('projectManager.flushProjectWithLocks')
    const callback = function (...args) {
      timer.done()
      return _callback(...Array.from(args || []))
    }

    return RedisManager.getDocIdsInProject(project_id, function (
      error,
      doc_ids
    ) {
      if (error != null) {
        return callback(error)
      }
      const jobs = []
      const errors = []
      for (const doc_id of Array.from(doc_ids || [])) {
        ;((doc_id) =>
          jobs.push((callback) =>
            DocumentManager.flushDocIfLoadedWithLock(
              project_id,
              doc_id,
              function (error) {
                if (error != null && error instanceof Errors.NotFoundError) {
                  logger.warn(
                    { err: error, project_id, doc_id },
                    'found deleted doc when flushing'
                  )
                  return callback()
                } else if (error != null) {
                  logger.error(
                    { err: error, project_id, doc_id },
                    'error flushing doc'
                  )
                  errors.push(error)
                  return callback()
                } else {
                  return callback()
                }
              }
            )
          ))(doc_id)
      }

      logger.log({ project_id, doc_ids }, 'flushing docs')
      return async.series(jobs, function () {
        if (errors.length > 0) {
          return callback(
            new Error('Errors flushing docs. See log for details')
          )
        } else {
          return callback(null)
        }
      })
    })
  },

  flushAndDeleteProjectWithLocks(project_id, options, _callback) {
    if (_callback == null) {
      _callback = function (error) {}
    }
    const timer = new Metrics.Timer(
      'projectManager.flushAndDeleteProjectWithLocks'
    )
    const callback = function (...args) {
      timer.done()
      return _callback(...Array.from(args || []))
    }

    return RedisManager.getDocIdsInProject(project_id, function (
      error,
      doc_ids
    ) {
      if (error != null) {
        return callback(error)
      }
      const jobs = []
      const errors = []
      for (const doc_id of Array.from(doc_ids || [])) {
        ;((doc_id) =>
          jobs.push((callback) =>
            DocumentManager.flushAndDeleteDocWithLock(
              project_id,
              doc_id,
              {},
              function (error) {
                if (error != null) {
                  logger.error(
                    { err: error, project_id, doc_id },
                    'error deleting doc'
                  )
                  errors.push(error)
                }
                return callback()
              }
            )
          ))(doc_id)
      }

      logger.log({ project_id, doc_ids }, 'deleting docs')
      return async.series(jobs, () =>
        // When deleting the project here we want to ensure that project
        // history is completely flushed because the project may be
        // deleted in web after this call completes, and so further
        // attempts to flush would fail after that.
        HistoryManager.flushProjectChanges(project_id, options, function (
          error
        ) {
          if (errors.length > 0) {
            return callback(
              new Error('Errors deleting docs. See log for details')
            )
          } else if (error != null) {
            return callback(error)
          } else {
            return callback(null)
          }
        })
      )
    })
  },

  queueFlushAndDeleteProject(project_id, callback) {
    if (callback == null) {
      callback = function (error) {}
    }
    return RedisManager.queueFlushAndDeleteProject(project_id, function (
      error
    ) {
      if (error != null) {
        logger.error(
          { project_id, error },
          'error adding project to flush and delete queue'
        )
        return callback(error)
      }
      Metrics.inc('queued-delete')
      return callback()
    })
  },

  getProjectDocsTimestamps(project_id, callback) {
    if (callback == null) {
      callback = function (error) {}
    }
    return RedisManager.getDocIdsInProject(project_id, function (
      error,
      doc_ids
    ) {
      if (error != null) {
        return callback(error)
      }
      if (!(doc_ids != null ? doc_ids.length : undefined)) {
        return callback(null, [])
      }
      return RedisManager.getDocTimestamps(doc_ids, function (
        error,
        timestamps
      ) {
        if (error != null) {
          return callback(error)
        }
        return callback(null, timestamps)
      })
    })
  },

  getProjectDocsAndFlushIfOld(
    project_id,
    projectStateHash,
    excludeVersions,
    _callback
  ) {
    if (excludeVersions == null) {
      excludeVersions = {}
    }
    if (_callback == null) {
      _callback = function (error, docs) {}
    }
    const timer = new Metrics.Timer(
      'projectManager.getProjectDocsAndFlushIfOld'
    )
    const callback = function (...args) {
      timer.done()
      return _callback(...Array.from(args || []))
    }

    return RedisManager.checkOrSetProjectState(
      project_id,
      projectStateHash,
      function (error, projectStateChanged) {
        if (error != null) {
          logger.error(
            { err: error, project_id },
            'error getting/setting project state in getProjectDocsAndFlushIfOld'
          )
          return callback(error)
        }
        // we can't return docs if project structure has changed
        if (projectStateChanged) {
          return callback(
            Errors.ProjectStateChangedError('project state changed')
          )
        }
        // project structure hasn't changed, return doc content from redis
        return RedisManager.getDocIdsInProject(project_id, function (
          error,
          doc_ids
        ) {
          if (error != null) {
            logger.error(
              { err: error, project_id },
              'error getting doc ids in getProjectDocs'
            )
            return callback(error)
          }
          const jobs = []
          for (const doc_id of Array.from(doc_ids || [])) {
            ;((doc_id) =>
              jobs.push((
                cb // get the doc lines from redis
              ) =>
                DocumentManager.getDocAndFlushIfOldWithLock(
                  project_id,
                  doc_id,
                  function (err, lines, version) {
                    if (err != null) {
                      logger.error(
                        { err, project_id, doc_id },
                        'error getting project doc lines in getProjectDocsAndFlushIfOld'
                      )
                      return cb(err)
                    }
                    const doc = { _id: doc_id, lines, v: version } // create a doc object to return
                    return cb(null, doc)
                  }
                )
              ))(doc_id)
          }
          return async.series(jobs, function (error, docs) {
            if (error != null) {
              return callback(error)
            }
            return callback(null, docs)
          })
        })
      }
    )
  },

  clearProjectState(project_id, callback) {
    if (callback == null) {
      callback = function (error) {}
    }
    return RedisManager.clearProjectState(project_id, callback)
  },

  updateProjectWithLocks(
    project_id,
    projectHistoryId,
    user_id,
    docUpdates,
    fileUpdates,
    version,
    _callback
  ) {
    if (_callback == null) {
      _callback = function (error) {}
    }
    const timer = new Metrics.Timer('projectManager.updateProject')
    const callback = function (...args) {
      timer.done()
      return _callback(...Array.from(args || []))
    }

    const project_version = version
    let project_subversion = 0 // project versions can have multiple operations

    let project_ops_length = 0

    const handleDocUpdate = function (projectUpdate, cb) {
      const doc_id = projectUpdate.id
      projectUpdate.version = `${project_version}.${project_subversion++}`
      if (projectUpdate.docLines != null) {
        return ProjectHistoryRedisManager.queueAddEntity(
          project_id,
          projectHistoryId,
          'doc',
          doc_id,
          user_id,
          projectUpdate,
          function (error, count) {
            project_ops_length = count
            return cb(error)
          }
        )
      } else {
        return DocumentManager.renameDocWithLock(
          project_id,
          doc_id,
          user_id,
          projectUpdate,
          projectHistoryId,
          function (error, count) {
            project_ops_length = count
            return cb(error)
          }
        )
      }
    }

    const handleFileUpdate = function (projectUpdate, cb) {
      const file_id = projectUpdate.id
      projectUpdate.version = `${project_version}.${project_subversion++}`
      if (projectUpdate.url != null) {
        return ProjectHistoryRedisManager.queueAddEntity(
          project_id,
          projectHistoryId,
          'file',
          file_id,
          user_id,
          projectUpdate,
          function (error, count) {
            project_ops_length = count
            return cb(error)
          }
        )
      } else {
        return ProjectHistoryRedisManager.queueRenameEntity(
          project_id,
          projectHistoryId,
          'file',
          file_id,
          user_id,
          projectUpdate,
          function (error, count) {
            project_ops_length = count
            return cb(error)
          }
        )
      }
    }

    return async.eachSeries(docUpdates, handleDocUpdate, function (error) {
      if (error != null) {
        return callback(error)
      }
      return async.eachSeries(fileUpdates, handleFileUpdate, function (error) {
        if (error != null) {
          return callback(error)
        }
        if (
          HistoryManager.shouldFlushHistoryOps(
            project_ops_length,
            docUpdates.length + fileUpdates.length,
            HistoryManager.FLUSH_PROJECT_EVERY_N_OPS
          )
        ) {
          HistoryManager.flushProjectChangesAsync(project_id)
        }
        return callback()
      })
    })
  }
}