import PouchDB from 'pouchdb';
import { connect } from 'react-redux'

function PDB(){
const  projectsDB = new PouchDB("projectDocs");
const wbsDB = new PouchDB("wbsDocs");
const tasksDB = new PouchDB("taskDocs");

const remoteDB = new PouchDB('http://192.168.0.234:5984/ditswbs');
projectsDB.sync(remoteDB, { live: true, retry: true });
tasksDB.sync(remoteDB, { live: true, retry: true });
wbsDB.sync(remoteDB, { live: true, retry: true });

function GetDoc(docID) {
  return new Promise((resolve, reject)=> {
    projectsDB.get(docID)
    .then((result)=> {return resolve(result)})
    .catch((err)=> {
      if (err.status === 404) {
        console.log('error 404')
        return resolve(null)
      } else {
        console.log('other:', err)
        return reject(err)
      }
    })
  })
}

//function commitProjects() {
//    db.put(
//      projects: props.projects,
//      )
//  }

// function commitWBS() {
    // evaluate parent child relation based on IDs 
    // and determine WBS level of each task in selected project
    // this is dictionary where WBS level against project ID
    // reorder the dictionary
    // put the dictionary in local pouchdb
//    db.put(
//      projects: props.projects,
//      )
//  }

// function commitTasks(Tasks) {
  // first check if a project is selected. This is a requirement before tasks can be 
  // commmitted
  // if (!props.selectedProjectId) {
    // commit tasks for selected projectID equals to one of the entries in task parentID
    // Step1 verify if current input list of tasks have selected selected projectID as 
    // parentCount = 0
    // const parents = Tasks.parentId
    //    parents.map ( parent => {if ( parent seletecProjectId eq ) { 
    //                    parentCount = parentCount+1 }}
    // 
    // parent. If one or more do not have selected tasks fail the check return their 
    // with the a descriptive error message.
    //...
      // Step2
      // This step is nested in step 1. If initial check is successful then commit inputed
      // if (parents.length = parentCount ) {
      // ... commit code}
      // exit with error
  // }
// }

}

export default connect(mapStateToProps)(PDB);

function mapStateToProps(state) {
  return {
    tasks: state.tasksReducer.tasks,
    projects: state.projectsReducer.projects,
    selectedProjectId: state.projectsReducer.selectedProjectId,
  };
}