import { Component, linkEvent } from "inferno";
import { Prompt } from "inferno-router";
import {
  CommunityResponse,
  CommunityView,
  CreateCommunity,
  EditCommunity,
  UserOperation,
} from "lemmy-js-client";
import { Subscription } from "rxjs";
import { i18n } from "../../i18next";
import { UserService, WebSocketService } from "../../services";
import {
  authField,
  capitalizeFirstLetter,
  randomStr,
  toast,
  wsClient,
  wsJsonToRes,
  wsSubscribe,
  wsUserOp,
} from "../../utils";
import { Icon, Spinner } from "../common/icon";
import { ImageUploadForm } from "../common/image-upload-form";
import { MarkdownTextArea } from "../common/markdown-textarea";

interface CommunityFormProps {
  community_view?: CommunityView; // If a community is given, that means this is an edit
  onCancel?(): any;
  onCreate?(community: CommunityView): any;
  onEdit?(community: CommunityView): any;
  enableNsfw: boolean;
}

interface CommunityFormState {
  communityForm: CreateCommunity;
  loading: boolean;
}

export class CommunityForm extends Component<
  CommunityFormProps,
  CommunityFormState
> {
  private id = `community-form-${randomStr()}`;
  private subscription: Subscription;

  private emptyState: CommunityFormState = {
    communityForm: {
      name: null,
      title: null,
      nsfw: false,
      icon: null,
      banner: null,
      auth: authField(false),
    },
    loading: false,
  };

  constructor(props: any, context: any) {
    super(props, context);

    this.state = this.emptyState;

    this.handleCommunityDescriptionChange =
      this.handleCommunityDescriptionChange.bind(this);

    this.handleIconUpload = this.handleIconUpload.bind(this);
    this.handleIconRemove = this.handleIconRemove.bind(this);

    this.handleBannerUpload = this.handleBannerUpload.bind(this);
    this.handleBannerRemove = this.handleBannerRemove.bind(this);

    let cv = this.props.community_view;
    if (cv) {
      this.state.communityForm = {
        name: cv.community.name,
        title: cv.community.title,
        description: cv.community.description,
        nsfw: cv.community.nsfw,
        icon: cv.community.icon,
        banner: cv.community.banner,
        auth: authField(),
      };
    }

    this.parseMessage = this.parseMessage.bind(this);
    this.subscription = wsSubscribe(this.parseMessage);
  }

  // TODO this should be checked out
  componentDidUpdate() {
    if (
      !this.state.loading &&
      (this.state.communityForm.name ||
        this.state.communityForm.title ||
        this.state.communityForm.description)
    ) {
      window.onbeforeunload = () => true;
    } else {
      window.onbeforeunload = undefined;
    }
  }

  componentWillUnmount() {
    this.subscription.unsubscribe();
    window.onbeforeunload = null;
  }

  render() {
    return (
      <>
        <Prompt
          when={
            !this.state.loading &&
            (this.state.communityForm.name ||
              this.state.communityForm.title ||
              this.state.communityForm.description)
          }
          message={i18n.t("block_leaving")}
        />
        <form onSubmit={linkEvent(this, this.handleCreateCommunitySubmit)}>
          {!this.props.community_view && (
            <div class="form-group row">
              <label
                class="col-12 col-sm-2 col-form-label"
                htmlFor="community-name"
              >
                {i18n.t("name")}
                <span
                  class="position-absolute pointer unselectable ml-2 text-muted"
                  data-tippy-content={i18n.t("name_explain")}
                >
                  <Icon icon="help-circle" classes="icon-inline" />
                </span>
              </label>
              <div class="col-12 col-sm-10">
                <input
                  type="text"
                  id="community-name"
                  class="form-control"
                  value={this.state.communityForm.name}
                  onInput={linkEvent(this, this.handleCommunityNameChange)}
                  required
                  minLength={3}
                  pattern="[a-z0-9_]+"
                  title={i18n.t("community_reqs")}
                />
              </div>
            </div>
          )}
          <div class="form-group row">
            <label
              class="col-12 col-sm-2 col-form-label"
              htmlFor="community-title"
            >
              {i18n.t("display_name")}
              <span
                class="position-absolute pointer unselectable ml-2 text-muted"
                data-tippy-content={i18n.t("display_name_explain")}
              >
                <Icon icon="help-circle" classes="icon-inline" />
              </span>
            </label>
            <div class="col-12 col-sm-10">
              <input
                type="text"
                id="community-title"
                value={this.state.communityForm.title}
                onInput={linkEvent(this, this.handleCommunityTitleChange)}
                class="form-control"
                required
                minLength={3}
                maxLength={100}
              />
            </div>
          </div>
          <div class="form-group row">
            <label class="col-12 col-sm-2">{i18n.t("icon")}</label>
            <div class="col-12 col-sm-10">
              <ImageUploadForm
                uploadTitle={i18n.t("upload_icon")}
                imageSrc={this.state.communityForm.icon}
                onUpload={this.handleIconUpload}
                onRemove={this.handleIconRemove}
                rounded
              />
            </div>
          </div>
          <div class="form-group row">
            <label class="col-12 col-sm-2">{i18n.t("banner")}</label>
            <div class="col-12 col-sm-10">
              <ImageUploadForm
                uploadTitle={i18n.t("upload_banner")}
                imageSrc={this.state.communityForm.banner}
                onUpload={this.handleBannerUpload}
                onRemove={this.handleBannerRemove}
              />
            </div>
          </div>
          <div class="form-group row">
            <label class="col-12 col-sm-2 col-form-label" htmlFor={this.id}>
              {i18n.t("sidebar")}
            </label>
            <div class="col-12 col-sm-10">
              <MarkdownTextArea
                initialContent={this.state.communityForm.description}
                onContentChange={this.handleCommunityDescriptionChange}
              />
            </div>
          </div>

          {this.props.enableNsfw && (
            <div class="form-group row">
              <legend class="col-form-label col-sm-2 pt-0">
                {i18n.t("nsfw")}
              </legend>
              <div class="col-10">
                <div class="form-check">
                  <input
                    class="form-check-input position-static"
                    id="community-nsfw"
                    type="checkbox"
                    checked={this.state.communityForm.nsfw}
                    onChange={linkEvent(this, this.handleCommunityNsfwChange)}
                  />
                </div>
              </div>
            </div>
          )}
          <div class="form-group row">
            <div class="col-12">
              <button
                type="submit"
                class="btn btn-secondary mr-2"
                disabled={this.state.loading}
              >
                {this.state.loading ? (
                  <Spinner />
                ) : this.props.community_view ? (
                  capitalizeFirstLetter(i18n.t("save"))
                ) : (
                  capitalizeFirstLetter(i18n.t("create"))
                )}
              </button>
              {this.props.community_view && (
                <button
                  type="button"
                  class="btn btn-secondary"
                  onClick={linkEvent(this, this.handleCancel)}
                >
                  {i18n.t("cancel")}
                </button>
              )}
            </div>
          </div>
        </form>
      </>
    );
  }

  handleCreateCommunitySubmit(i: CommunityForm, event: any) {
    event.preventDefault();
    i.state.loading = true;
    if (i.props.community_view) {
      let form: EditCommunity = {
        ...i.state.communityForm,
        community_id: i.props.community_view.community.id,
      };
      WebSocketService.Instance.send(wsClient.editCommunity(form));
    } else {
      WebSocketService.Instance.send(
        wsClient.createCommunity(i.state.communityForm)
      );
    }
    i.setState(i.state);
  }

  handleCommunityNameChange(i: CommunityForm, event: any) {
    i.state.communityForm.name = event.target.value;
    i.setState(i.state);
  }

  handleCommunityTitleChange(i: CommunityForm, event: any) {
    i.state.communityForm.title = event.target.value;
    i.setState(i.state);
  }

  handleCommunityDescriptionChange(val: string) {
    this.state.communityForm.description = val;
    this.setState(this.state);
  }

  handleCommunityNsfwChange(i: CommunityForm, event: any) {
    i.state.communityForm.nsfw = event.target.checked;
    i.setState(i.state);
  }

  handleCancel(i: CommunityForm) {
    i.props.onCancel();
  }

  handleIconUpload(url: string) {
    this.state.communityForm.icon = url;
    this.setState(this.state);
  }

  handleIconRemove() {
    this.state.communityForm.icon = "";
    this.setState(this.state);
  }

  handleBannerUpload(url: string) {
    this.state.communityForm.banner = url;
    this.setState(this.state);
  }

  handleBannerRemove() {
    this.state.communityForm.banner = "";
    this.setState(this.state);
  }

  parseMessage(msg: any) {
    let op = wsUserOp(msg);
    console.log(msg);
    if (msg.error) {
      toast(i18n.t(msg.error), "danger");
      this.state.loading = false;
      this.setState(this.state);
      return;
    } else if (op == UserOperation.CreateCommunity) {
      let data = wsJsonToRes<CommunityResponse>(msg).data;
      this.state.loading = false;
      this.props.onCreate(data.community_view);

      // Update myUserInfo
      let community = data.community_view.community;
      let person = UserService.Instance.myUserInfo.local_user_view.person;
      UserService.Instance.myUserInfo.follows.push({
        community,
        follower: person,
      });
      UserService.Instance.myUserInfo.moderates.push({
        community,
        moderator: person,
      });
    } else if (op == UserOperation.EditCommunity) {
      let data = wsJsonToRes<CommunityResponse>(msg).data;
      this.state.loading = false;
      this.props.onEdit(data.community_view);
      let community = data.community_view.community;

      let followFound = UserService.Instance.myUserInfo.follows.findIndex(
        f => f.community.id == community.id
      );
      if (followFound) {
        UserService.Instance.myUserInfo.follows[followFound].community =
          community;
      }

      let moderatesFound = UserService.Instance.myUserInfo.moderates.findIndex(
        f => f.community.id == community.id
      );
      if (moderatesFound) {
        UserService.Instance.myUserInfo.moderates[moderatesFound].community =
          community;
      }
    }
  }
}