class RessourceList {
  /* A wrapper class for the list.js list.
   * This class is not meant to be used directly, instead it should be used as
   * a template for concrete ressource list implementations.
   */
  constructor(listElement, options = {}) {
    if (listElement.dataset.userId) {
      if (listElement.dataset.userId in nopaque.appClient.users) {
        this.user = nopaque.appClient.users[listElement.dataset.userId];
      } else {
        console.error(`User not found: ${listElement.dataset.userId}`);
        return;
      }
    } else {
      this.user = nopaque.appClient.users.self;
    }
    this.list = new List(listElement, {...RessourceList.options, ...options});
    this.valueNames = ['id'];
    for (let element of this.list.valueNames) {
      switch (typeof element) {
        case 'object':
          if (element.hasOwnProperty('name')) {this.valueNames.push(element.name);}
          break;
        case 'string':
          this.valueNames.push(element);
          break;
        default:
          console.error(`Unknown value name definition: ${element}`);
      }
    }
  }

  init(ressources) {
    this.list.clear();
    this.add(Object.values(ressources));
    this.list.sort('id', {order: 'desc'});
  }

  patch(patch) {
    /*
     * It's not possible to generalize a patch Handler for all type of
     * ressources. So this method is meant to be an interface.
     */
    console.error('patch method not implemented!');
  }

  add(values) {
    let ressources = Array.isArray(values) ? values : [values];
    // Discard ressource values, that are not defined to be used in the list.
    ressources = ressources.map(ressource => {
      let cleanedRessource = {};
      for (let [valueName, value] of Object.entries(ressource)) {
        if (this.valueNames.includes(valueName)) {cleanedRessource[valueName] = value;}
      }
      return cleanedRessource;
    });
    // Set a callback function ('() => {return;}') to force List.js perform the
    // add method asynchronous: https://listjs.com/api/#add
    this.list.add(ressources, () => {return;});
  }

  remove(id) {
    this.list.remove('id', id);
  }

  replace(id, valueName, newValue) {
    if (this.valueNames.includes(valueName)) {
      let item = this.list.get('id', id)[0];
      item.values({[valueName]: newValue});
    }
  }
}
RessourceList.options = {page: 5, pagination: [{innerWindow: 4, outerWindow: 1}]};


class CorpusList extends RessourceList {
  constructor(listElement, options = {}) {
    super(listElement, {...CorpusList.options, ...options});
    this.user.addEventListener('corporaInit', corpora => this.init(corpora));
    this.user.addEventListener('corporaPatch', patch => this.patch(patch));
    listElement.addEventListener('click', (event) => {this.onclick(event)});
  }

  onclick(event) {
    let corpusId = event.target.closest('tr').dataset.id;
    let actionButtonElement = event.target.closest('.action-button');
    let action = actionButtonElement === null ? 'view' : actionButtonElement.dataset.action;
    switch (action) {
      case 'analyse':
        window.location.href = nopaque.user.corpora[corpusId].analysis_url;
      case 'delete':
        let deleteModalHTML = `<div class="modal">
                                 <div class="modal-content">
                                   <h4>Confirm corpus deletion</h4>
                                   <p>Do you really want to delete the corpus <b>${nopaque.user.corpora[corpusId].title}</b>? All files will be permanently deleted!</p>
                                 </div>
                                 <div class="modal-footer">
                                   <a href="#!" class="btn modal-close waves-effect waves-light">Cancel</a>
                                   <a class="btn modal-close red waves-effect waves-light" href="${nopaque.user.corpora[corpusId].url}/delete"><i class="material-icons left">delete</i>Delete</a>
                                 </div>
                               </div>`;
        let deleteModalParentElement = document.querySelector('main');
        deleteModalParentElement.insertAdjacentHTML('beforeend', deleteModalHTML);
        let deleteModalElement = deleteModalParentElement.lastChild;
        let deleteModal = M.Modal.init(deleteModalElement, {onCloseEnd: () => {deleteModal.destroy(); deleteModalElement.remove();}});
        deleteModal.open();
        break;
      case 'view':
        // TODO: handle unprepared corpora
        window.location.href = nopaque.user.corpora[corpusId].url;
        break;
      default:
        console.error(`Unknown action: ${action}`);
        break;
    }
  }

  patch(patch) {
    for (let operation of patch) {
      switch(operation.op) {
        case 'add':
          // Matches the only paths that should be handled here: /corpora/{corpusId}
          if (/^\/corpora\/(\d+)$/.test(operation.path)) {this.add(operation.value);}
          break;
        case 'remove':
          // See case 'add' ;)
          if (/^\/corpora\/(\d+)$/.test(operation.path)) {
            let [match, id] = operation.path.match(/^\/corpora\/(\d+)$/);
            this.remove(corpusId);
          }
          break;
        case 'replace':
          // Matches the only paths that should be handled here: /corpora/{corpusId}/{status || description || title}
          if (/^\/corpora\/(\d+)\/(status|description|title)$/.test(operation.path)) {
            let [match, id, valueName] = operation.path.match(/^\/corpora\/(\d+)\/(status|description|title)$/);
            this.replace(id, valueName, operation.value);
          }
          break;
        default:
          break;
      }
    }
  }
}
CorpusList.options = {
  item: `<tr>
           <td><a class="btn-floating disabled"><i class="material-icons">book</i></a></td>
           <td><b class="title"></b><br><i class="description"></i></td>
           <td><span class="badge new status" data-badge-caption=""></span></td>
           <td class="right-align">
             <a class="action-button btn-floating red tooltipped waves-effect waves-light" data-action="delete" data-position="top" data-tooltip="Delete"><i class="material-icons">delete</i></a>
             <a class="action-button btn-floating tooltipped waves-effect waves-light" data-action="analyse" data-position="top" data-tooltip="Analyse"><i class="material-icons">search</i></a>
             <a class="action-button btn-floating tooltipped waves-effect waves-light" data-action="view" data-position="top" data-tooltip="View"><i class="material-icons">send</i></a>
           </td>
         </tr>`,
  valueNames: [{data: ['id']}, {name: 'status', attr: 'data-status'}, 'description', 'title']
};


class JobList extends RessourceList {
  constructor(listElement, options = {}) {
    super(listElement, {...JobList.options, ...options});
    this.user.addEventListener('jobsInit', jobs => this.init(jobs));
    this.user.addEventListener('jobsPatch', patch => this.patch(patch));
    listElement.addEventListener('click', (event) => {this.onclick(event)});
  }

  onclick(event) {
    let jobId = event.target.closest('tr').dataset.id;
    let actionButtonElement = event.target.closest('.action-button');
    let action = actionButtonElement === null ? 'view' : actionButtonElement.dataset.action;
    switch (action) {
      case 'delete':
        let deleteModalHTML = `<div class="modal">
                                 <div class="modal-content">
                                   <h4>Confirm job deletion</h4>
                                   <p>Do you really want to delete the job <b>${this.user.data.jobs[jobId].title}</b>? All files will be permanently deleted!</p>
                                 </div>
                                 <div class="modal-footer">
                                   <a href="#!" class="btn modal-close waves-effect waves-light">Cancel</a>
                                   <a class="btn modal-close red waves-effect waves-light" href="${this.user.data.jobs[jobId].url}/delete"><i class="material-icons left">delete</i>Delete</a>
                                 </div>
                               </div>`;
        let deleteModalParentElement = document.querySelector('main');
        deleteModalParentElement.insertAdjacentHTML('beforeend', deleteModalHTML);
        let deleteModalElement = deleteModalParentElement.lastChild;
        let deleteModal = M.Modal.init(deleteModalElement, {onCloseEnd: () => {deleteModal.destroy(); deleteModalElement.remove();}});
        deleteModal.open();
        break;
      case 'view':
        window.location.href = this.user.data.jobs[jobId].url;
        break;
      default:
        console.error(`Unknown action: "${action}"`);
        break;
    }
  }

  patch(patch) {
    for (let operation of patch) {
      switch(operation.op) {
        case 'add':
          // Matches the only paths that should be handled here: /jobs/{jobId}
          if (/^\/jobs\/(\d+)$/.test(operation.path)) {this.add(operation.value);}
          break;
        case 'remove':
          // See case add ;)
          if (/^\/jobs\/(\d+)$/.test(operation.path)) {
            let [match, id] = operation.path.match(/^\/jobs\/(\d+)$/);
            this.remove(jobId);
          }
          break;
        case 'replace':
          // Matches the only paths that should be handled here: /jobs/{jobId}/{service || status || description || title}
          if (/^\/jobs\/(\d+)\/(service|status|description|title)$/.test(operation.path)) {
            let [match, id, valueName] = operation.path.match(/^\/jobs\/(\d+)\/(service|status|description|title)$/);
            this.replace(id, valueName, operation.value);
          }
          break;
        default:
          break;
      }
    }
  }
}
JobList.options = {
  item: `<tr>
           <td><a class="btn-floating disabled"><i class="material-icons service"></i></a></td>
           <td><b class="title"></b><br><i class="description"></i></td>
           <td><span class="badge new status" data-badge-caption=""></span></td>
           <td class="right-align">
             <a class="action-button btn-floating red tooltipped waves-effect waves-light" data-action="delete" data-position="top" data-tooltip="Delete"><i class="material-icons">delete</i></a>
             <a class="action-button btn-floating tooltipped waves-effect waves-light" data-action="view" data-position="top" data-tooltip="View"><i class="material-icons">send</i></a>
           </td>
         </tr>`,
  valueNames: [{data: ['id']}, {name: 'service', attr: 'data-service'}, {name: 'status', attr: 'data-status'}, 'description', 'title']
};


class QueryResultList extends RessourceList {
  constructor(listElement, options = {}) {
    super(listElement, {...QueryResultList.options, ...options});
    this.user.addEventListener('queryResultsInit', queryResults => this.init(queryResults));
    this.user.addEventListener('queryResultsPatch', patch => this.init(patch));
  }
}
QueryResultList.options = {
  item: `<tr>
           <td><b class="title"></b><br><i class="description"></i><br></td>
           <td><span class="corpus_title"></span><br><span class="query"></span></td>
           <td class="right-align">
             <a class="action-button btn-floating red tooltipped waves-effect waves-light" data-action="delete" data-position="top" data-tooltip="Delete"><i class="material-icons">delete</i></a>
             <a class="action-button btn-floating tooltipped waves-effect waves-light" data-action="view" data-position="top" data-tooltip="View"><i class="material-icons">send</i></a>
             <a class="action-button btn-floating tooltipped waves-effect waves-light" data-action="analyse" data-position="top" data-tooltip="Analyse"><i class="material-icons">search</i></a>
           </td>
         </tr>`,
  valueNames: [{data: ['id']}, 'corpus_title', 'description', 'query', 'title']
};