import Component from '@ember/component';
import { classNames } from '@ember-decorators/component';
import { task } from 'ember-concurrency';
import { action, set } from '@ember/object';
import { inject as service } from '@ember/service';
import { debounce, run } from '@ember/runloop';

const SLASH_KEY = '/';
const MAXIMUM_RESULTS = 10;

@classNames('global-search-container')
export default class GlobalSearchControl extends Component {
  @service router;
  @service token;

  searchString = null;

  constructor() {
    super(...arguments);
    this['data-test-search-parent'] = true;
  }

  keyDownHandler(e) {
    const targetElementName = e.target.nodeName.toLowerCase();

    if (targetElementName != 'input' && targetElementName != 'textarea') {
      if (e.key === SLASH_KEY) {
        e.preventDefault();
        this.open();
      }
    }
  }

  didInsertElement() {
    super.didInsertElement(...arguments);
    set(this, '_keyDownHandler', this.keyDownHandler.bind(this));
    document.addEventListener('keydown', this._keyDownHandler);
  }

  willDestroyElement() {
    super.willDestroyElement(...arguments);
    document.removeEventListener('keydown', this._keyDownHandler);
  }

  @task(function* (string) {
    const searchResponse = yield this.token.authorizedRequest(
      '/v1/search/fuzzy',
      {
        method: 'POST',
        body: JSON.stringify({
          Text: string,
          Context: 'all',
          Namespace: '*',
        }),
      }
    );

    const results = yield searchResponse.json();

    const allJobResults = results.Matches.jobs || [];
    const allNodeResults = results.Matches.nodes || [];
    const allAllocationResults = results.Matches.allocs || [];
    const allTaskGroupResults = results.Matches.groups || [];
    const allCSIPluginResults = results.Matches.plugins || [];

    const jobResults = allJobResults
      .slice(0, MAXIMUM_RESULTS)
      .map(({ ID: name, Scope: [namespace, id] }) => ({
        type: 'job',
        id,
        namespace,
        label: `${namespace} > ${name}`,
      }));

    const nodeResults = allNodeResults
      .slice(0, MAXIMUM_RESULTS)
      .map(({ ID: name, Scope: [id] }) => ({
        type: 'node',
        id,
        label: name,
      }));

    const allocationResults = allAllocationResults
      .slice(0, MAXIMUM_RESULTS)
      .map(({ ID: name, Scope: [namespace, id] }) => ({
        type: 'allocation',
        id,
        label: `${namespace} > ${name}`,
      }));

    const taskGroupResults = allTaskGroupResults
      .slice(0, MAXIMUM_RESULTS)
      .map(({ ID: id, Scope: [namespace, jobId] }) => ({
        type: 'task-group',
        id,
        namespace,
        jobId,
        label: `${namespace} > ${jobId} > ${id}`,
      }));

    const csiPluginResults = allCSIPluginResults
      .slice(0, MAXIMUM_RESULTS)
      .map(({ ID: id }) => ({
        type: 'plugin',
        id,
        label: id,
      }));

    const {
      jobs: jobsTruncated,
      nodes: nodesTruncated,
      allocs: allocationsTruncated,
      groups: taskGroupsTruncated,
      plugins: csiPluginsTruncated,
    } = results.Truncations;

    return [
      {
        groupName: resultsGroupLabel(
          'Jobs',
          jobResults,
          allJobResults,
          jobsTruncated
        ),
        options: jobResults,
      },
      {
        groupName: resultsGroupLabel(
          'Clients',
          nodeResults,
          allNodeResults,
          nodesTruncated
        ),
        options: nodeResults,
      },
      {
        groupName: resultsGroupLabel(
          'Allocations',
          allocationResults,
          allAllocationResults,
          allocationsTruncated
        ),
        options: allocationResults,
      },
      {
        groupName: resultsGroupLabel(
          'Task Groups',
          taskGroupResults,
          allTaskGroupResults,
          taskGroupsTruncated
        ),
        options: taskGroupResults,
      },
      {
        groupName: resultsGroupLabel(
          'CSI Plugins',
          csiPluginResults,
          allCSIPluginResults,
          csiPluginsTruncated
        ),
        options: csiPluginResults,
      },
    ];
  })
  search;

  @action
  open() {
    if (this.select) {
      this.select.actions.open();
    }
  }

  @action
  ensureMinimumLength(string) {
    return string.length > 1;
  }

  @action
  selectOption(model) {
    if (model.type === 'job') {
      this.router.transitionTo('jobs.job', model.id, {
        queryParams: { namespace: model.namespace },
      });
    } else if (model.type === 'node') {
      this.router.transitionTo('clients.client', model.id);
    } else if (model.type === 'task-group') {
      this.router.transitionTo('jobs.job.task-group', model.jobId, model.id, {
        queryParams: { namespace: model.namespace },
      });
    } else if (model.type === 'plugin') {
      this.router.transitionTo('csi.plugins.plugin', model.id);
    } else if (model.type === 'allocation') {
      this.router.transitionTo('allocations.allocation', model.id);
    }
  }

  @action
  storeSelect(select) {
    if (select) {
      this.select = select;
    }
  }

  @action
  openOnClickOrTab(select, { target }) {
    // Bypass having to press enter to access search after clicking/tabbing
    const targetClassList = target.classList;
    const targetIsTrigger = targetClassList.contains(
      'ember-power-select-trigger'
    );

    // Allow tabbing out of search
    const triggerIsNotActive = !targetClassList.contains(
      'ember-power-select-trigger--active'
    );

    if (targetIsTrigger && triggerIsNotActive) {
      debounce(this, this.open, 150);
    }
  }

  @action
  onCloseEvent(select, event) {
    if (event.key === 'Escape') {
      run.next(() => {
        this.element.querySelector('.ember-power-select-trigger').blur();
      });
    }
  }

  calculatePosition(trigger) {
    const { top, left, width } = trigger.getBoundingClientRect();
    return {
      style: {
        left,
        width,
        top,
      },
    };
  }
}

function resultsGroupLabel(type, renderedResults, allResults, truncated) {
  let countString;

  if (renderedResults.length < allResults.length) {
    countString = `showing ${renderedResults.length} of ${allResults.length}`;
  } else {
    countString = renderedResults.length;
  }

  const truncationIndicator = truncated ? '+' : '';

  return `${type} (${countString}${truncationIndicator})`;
}