import { h, Component } from 'preact';
import { ListingRow } from './dashboard/listingRow';

export class ListingDashboard extends Component {
  state = {
    listings: [],
    orgListings: [],
    orgs: [],
    userCredits: 0,
    selectedListings: 'user',
    filter: 'All',
    sort: 'created_at',
  };

  componentDidMount() {
    const t = this;
    const container = document.getElementById('listings-dashboard');
    let listings = [];
    let orgs = [];
    let orgListings = [];
    listings = JSON.parse(container.dataset.listings).sort((a, b) =>
      a.created_at > b.created_at ? -1 : 1,
    );
    orgs = JSON.parse(container.dataset.orgs);
    orgListings = JSON.parse(container.dataset.orglistings);
    const userCredits = container.dataset.usercredits;
    t.setState({ listings, orgListings, orgs, userCredits });
  }

  render() {
    const {
      listings,
      orgListings,
      userCredits,
      orgs,
      selectedListings,
      filter,
      sort,
    } = this.state;

    const isExpired = (listing) =>
      listing.bumped_at && !listing.published
        ? (Date.now() - new Date(listing.bumped_at.toString()).getTime()) /
            (1000 * 60 * 60 * 24) >
          30
        : false;
    const isDraft = (listing) =>
      listing.bumped_at ? !isExpired(listing) && !listing.published : true;

    const filterListings = (listingsToFilter, selectedFilter) => {
      if (selectedFilter === 'Draft') {
        return listingsToFilter.filter((listing) => isDraft(listing));
      }
      if (selectedFilter === 'Expired') {
        return listingsToFilter.filter((listing) => isExpired(listing));
      }
      if (selectedFilter === 'Active') {
        return listingsToFilter.filter((listing) => listing.published === true);
      }
      return listingsToFilter;
    };

    const customSort = (a, b) => {
      if (a[sort] === null) {
        return 1;
      }
      if (b[sort] === null) {
        return -1;
      }
      if (a[sort] > b[sort]) {
        return -1;
      }
      return 1;
    };

    const showListings = (
      selected,
      userListings,
      organizationListings,
      selectedFilter,
    ) => {
      let displayedListings;
      if (selected === 'user') {
        displayedListings = filterListings(userListings, selectedFilter).sort(
          customSort,
        );
        return displayedListings.map((listing) => (
          <ListingRow listing={listing} key={listing.id} />
        ));
      }
      displayedListings = filterListings(
        organizationListings,
        selectedFilter,
      ).sort(customSort);
      return displayedListings.map((listing) =>
        listing.organization_id === selected ? (
          <ListingRow listing={listing} />
        ) : (
          ''
        ),
      );
    };

    const setStateOnKeyPress = (event, state) =>
      (event.key === 'Enter' || event.key === ' ') && this.setState(state);

    const filters = ['All', 'Active', 'Draft', 'Expired'];
    const filterButtons = filters.map((f, index) => (
      <span
        onClick={(event) => {
          this.setState({ filter: event.target.textContent });
        }}
        className={`rounded-btn ${filter === f ? 'active' : ''}`}
        role="button"
        key={index}
        onKeyPress={(event) =>
          setStateOnKeyPress(event, { filter: event.target.textContent })
        }
        tabIndex="0"
      >
        {f}
      </span>
    ));

    const sortingDropdown = (
      <div className="dashboard-listings-actions">
        <div className="listings-dashboard-filter-buttons">{filterButtons}</div>
        <select
          aria-label="Filter listings"
          onChange={(event) => {
            this.setState({ sort: event.target.value });
          }}
          onBlur={(event) => {
            this.setState({ sort: event.target.value });
          }}
        >
          <option value="created_at" selected="selected">
            Recently Created
          </option>
          <option value="bumped_at">Recently Bumped</option>
        </select>
      </div>
    );

    const orgButtons = orgs.map((org) => (
      <span
        onClick={() => this.setState({ selectedListings: org.id })}
        className={`rounded-btn ${selectedListings === org.id ? 'active' : ''}`}
        role="button"
        key={org.id}
        tabIndex="0"
        onKeyPress={(event) =>
          setStateOnKeyPress(event, { selectedListings: org.id })
        }
      >
        {org.name}
      </span>
    ));

    const listingLength = (selected, userListings, organizationListings) => {
      return selected === 'user' ? (
        <h4>
          Listings Made:
          {userListings.length}
        </h4>
      ) : (
        <h4>
          Listings Made:{' '}
          {
            organizationListings.filter(
              (listing) => listing.organization_id === selected,
            ).length
          }
        </h4>
      );
    };

    const creditCount = (selected, userCreds, organizations) => {
      return selected === 'user' ? (
        <h4>
          Credits Available:
          {userCreds}
        </h4>
      ) : (
        <h4>
          Credits Available:{' '}
          {
            organizations.find((org) => org.id === selected)
              .unspent_credits_count
          }
        </h4>
      );
    };

    return (
      <div className="dashboard-listings-container">
        <span
          onClick={() => this.setState({ selectedListings: 'user' })}
          className={`rounded-btn ${
            selectedListings === 'user' ? 'active' : ''
          }`}
          role="button"
          tabIndex="0"
          onKeyPress={(event) =>
            setStateOnKeyPress(event, { selectedListings: 'user' })
          }
        >
          Personal
        </span>
        {orgButtons}
        <div className="dashboard-listings-header-wrapper">
          <div className="dashboard-listings-header">
            <h3>Listings</h3>
            {listingLength(selectedListings, listings, orgListings)}
            <a href="/listings/new">Create a Listing</a>
          </div>
          <div className="dashboard-listings-header">
            <h3>Credits</h3>
            {creditCount(selectedListings, userCredits, orgs)}
            <a href="/credits/purchase" data-no-instant>
              Buy Credits
            </a>
          </div>
        </div>
        {sortingDropdown}
        <div className="dashboard-listings-view">
          {showListings(selectedListings, listings, orgListings, filter)}
        </div>
      </div>
    );
  }
}