import I18n from "I18n";
import Topic from "discourse/models/topic";
import User from "discourse/models/user";
import TopicStatus from "discourse/raw-views/topic-status";
import TopicStatusIcons from "discourse/helpers/topic-status-icons";
import { popupAjaxError } from "discourse/lib/ajax-error";
import { withPluginApi } from "discourse/lib/plugin-api";
import { ajax } from "discourse/lib/ajax";
import PostCooked from "discourse/widgets/post-cooked";
import { formatUsername } from "discourse/lib/utilities";
import { iconHTML } from "discourse-common/lib/icon-library";
import { iconNode } from "discourse-common/lib/icon-library";

function clearAccepted(topic) {
  const posts = topic.get("postStream.posts");
  posts.forEach((post) => {
    if (post.get("post_number") > 1) {
      post.setProperties({
        accepted_answer: false,
        can_accept_answer: true,
        can_unaccept_answer: false,
      });
    }
  });
}

function unacceptPost(post) {
  if (!post.can_unaccept_answer) {
    return;
  }
  const topic = post.topic;

  post.setProperties({
    can_accept_answer: true,
    can_unaccept_answer: false,
    accepted_answer: false,
  });
  topic.set("accepted_answer", undefined);

  ajax("/solution/unaccept", {
    type: "POST",
    data: { id: post.id },
  }).catch(popupAjaxError);
}

function acceptPost(post) {
  const topic = post.topic;

  clearAccepted(topic);

  post.setProperties({
    can_unaccept_answer: true,
    can_accept_answer: false,
    accepted_answer: true,
  });

  topic.set("accepted_answer", {
    username: post.username,
    post_number: post.post_number,
    excerpt: post.cooked,
  });

  ajax("/solution/accept", {
    type: "POST",
    data: { id: post.id },
  }).catch(popupAjaxError);
}

function initializeWithApi(api) {
  const currentUser = api.getCurrentUser();

  TopicStatusIcons.addObject([
    "has_accepted_answer",
    "far-check-square",
    "solved",
  ]);

  api.includePostAttributes(
    "can_accept_answer",
    "can_unaccept_answer",
    "accepted_answer"
  );

  if (api.addDiscoveryQueryParam) {
    api.addDiscoveryQueryParam("solved", { replace: true, refreshModel: true });
  }

  api.addPostMenuButton("solved", (attrs) => {
    const canAccept = attrs.can_accept_answer;
    const canUnaccept = attrs.can_unaccept_answer;
    const accepted = attrs.accepted_answer;
    const isOp = currentUser && currentUser.id === attrs.topicCreatedById;
    const position =
      !accepted && canAccept && !isOp ? "second-last-hidden" : "first";

    if (canAccept) {
      return {
        action: "acceptAnswer",
        icon: "far-check-square",
        className: "unaccepted",
        title: "solved.accept_answer",
        label: "solved.solution",
        position,
      };
    } else if (canUnaccept && accepted) {
      const title = canUnaccept
        ? "solved.unaccept_answer"
        : "solved.accepted_answer";
      return {
        action: "unacceptAnswer",
        icon: "check-square",
        title,
        className: "accepted fade-out",
        position,
        label: "solved.solution",
      };
    } else if (!canAccept && accepted) {
      return {
        className: "hidden",
        disabled: "true",
        position,
        beforeButton(h) {
          return h(
            "span.accepted-text",
            {
              title: I18n.t("solved.accepted_description"),
            },
            [
              h("span", iconNode("check")),
              h("span.accepted-label", I18n.t("solved.solution")),
            ]
          );
        },
      };
    }
  });

  api.decorateWidget("post-contents:after-cooked", (dec) => {
    if (dec.attrs.post_number === 1) {
      const postModel = dec.getModel();
      if (postModel) {
        const topic = postModel.topic;
        if (topic.accepted_answer) {
          const hasExcerpt = !!topic.accepted_answer.excerpt;

          const withExcerpt = `
            <aside class='quote accepted-answer' data-post="${
              topic.get("accepted_answer").post_number
            }" data-topic="${topic.id}">
              <div class='title'>
                ${topic.acceptedAnswerHtml} <div class="quote-controls"><\/div>
              </div>
              <blockquote>
                ${topic.accepted_answer.excerpt}
              </blockquote>
            </aside>`;

          const withoutExcerpt = `
            <aside class='quote accepted-answer'>
              <div class='title title-only'>
                ${topic.acceptedAnswerHtml}
              </div>
            </aside>`;

          const cooked = new PostCooked(
            { cooked: hasExcerpt ? withExcerpt : withoutExcerpt },
            dec
          );
          return dec.rawHtml(cooked.init());
        }
      }
    }
  });

  api.attachWidgetAction("post", "acceptAnswer", function () {
    const post = this.model;
    const current = post.get("topic.postStream.posts").filter((p) => {
      return p.post_number === 1 || p.accepted_answer;
    });
    acceptPost(post);

    current.forEach((p) =>
      this.appEvents.trigger("post-stream:refresh", { id: p.id })
    );
  });

  api.attachWidgetAction("post", "unacceptAnswer", function () {
    const post = this.model;
    const op = post
      .get("topic.postStream.posts")
      .find((p) => p.post_number === 1);
    unacceptPost(post);
    this.appEvents.trigger("post-stream:refresh", { id: op.id });
  });

  if (api.registerConnectorClass) {
    api.registerConnectorClass("user-activity-bottom", "solved-list", {
      shouldRender(args, component) {
        return component.siteSettings.solved_enabled;
      },
    });
    api.registerConnectorClass("user-summary-stat", "solved-count", {
      shouldRender(args, component) {
        return (
          component.siteSettings.solved_enabled && args.model.solved_count > 0
        );
      },
      setupComponent() {
        this.set("classNames", ["linked-stat"]);
      },
    });
  }
}

export default {
  name: "extend-for-solved-button",
  initialize() {
    Topic.reopen({
      // keeping this here cause there is complex localization
      acceptedAnswerHtml: Ember.computed("accepted_answer", "id", function () {
        const username = this.get("accepted_answer.username");
        const postNumber = this.get("accepted_answer.post_number");

        if (!username || !postNumber) {
          return "";
        }

        return I18n.t("solved.accepted_html", {
          icon: iconHTML("check-square", { class: "accepted" }),
          username_lower: username.toLowerCase(),
          username: formatUsername(username),
          post_path: `${this.url}/${postNumber}`,
          post_number: postNumber,
          user_path: User.create({ username }).path,
        });
      }),
    });

    TopicStatus.reopen({
      statuses: Ember.computed(function () {
        const results = this._super(...arguments);

        if (this.topic.has_accepted_answer) {
          results.push({
            openTag: "span",
            closeTag: "span",
            title: I18n.t("topic_statuses.solved.help"),
            icon: "far-check-square",
          });
        } else if (
          this.topic.can_have_answer &&
          this.siteSettings.solved_enabled &&
          this.siteSettings.empty_box_on_unsolved
        ) {
          results.push({
            openTag: "span",
            closeTag: "span",
            title: I18n.t("solved.has_no_accepted_answer"),
            icon: "far-square",
          });
        }
        return results;
      }),
    });

    withPluginApi("0.1", initializeWithApi);

    withPluginApi("0.8.10", (api) => {
      api.replaceIcon(
        "notification.solved.accepted_notification",
        "check-square"
      );
    });

    withPluginApi("0.11.0", (api) => {
      api.addAdvancedSearchOptions({
        statusOptions: [
          {
            name: I18n.t("search.advanced.statuses.solved"),
            value: "solved",
          },
          {
            name: I18n.t("search.advanced.statuses.unsolved"),
            value: "unsolved",
          },
        ],
      });
    });
  },
};