// mobx
import { action, observable, runInAction, makeAutoObservable } from "mobx";

// services
import issueService from "services/issues.service";

// types
import type { IIssueLabels, LabelLite, ICurrentUserResponse, LabelForm } from "types";

class LabelStore {
  labels: LabelLite[] = [];
  isLabelsLoading: boolean = false;
  rootStore: any | null = null;

  constructor(_rootStore: any | null = null) {
    makeAutoObservable(this, {
      labels: observable.ref,
      loadLabels: action,
      isLabelsLoading: observable,
      createLabel: action,
      updateLabel: action,
      deleteLabel: action,
    });

    this.rootStore = _rootStore;
  }

  /**
   * @description Fetch all labels of a project and hydrate labels field
   */

  loadLabels = async (workspaceSlug: string, projectId: string) => {
    this.isLabelsLoading = true;
    try {
      const labelsResponse: IIssueLabels[] = await issueService.getIssueLabels(
        workspaceSlug,
        projectId
      );
      runInAction(() => {
        this.labels = labelsResponse.map((label) => ({
          id: label.id,
          name: label.name,
          description: label.description,
          color: label.color,
          parent: label.parent,
        }));
        this.isLabelsLoading = false;
      });
    } catch (error) {
      this.isLabelsLoading = false;
      console.error("Fetching labels error", error);
    }
  };

  getLabelById = (labelId: string) => this.labels.find((label) => label.id === labelId);

  getLabelChildren = (labelId: string) => this.labels.filter((label) => label.parent === labelId);

  /**
   * For provided query, this function returns all labels that contain query in their name from the labels store.
   * @param query - query string
   * @returns {LabelLite[]} array of labels that contain query in their name
   * @example
   * getFilteredLabels("labe") // [{ id: "1", name: "label1", description: "", color: "", parent: null }]
   */
  getFilteredLabels = (query: string): LabelLite[] =>
    this.labels.filter((label) => label.name.includes(query));

  createLabel = async (
    workspaceSlug: string,
    projectId: string,
    labelForm: LabelForm,
    user: ICurrentUserResponse
  ) => {
    try {
      const labelResponse: IIssueLabels = await issueService.createIssueLabel(
        workspaceSlug,
        projectId,
        labelForm,
        user
      );

      runInAction(() => {
        this.labels = [
          ...this.labels,
          {
            id: labelResponse.id,
            name: labelResponse.name,
            description: labelResponse.description,
            color: labelResponse.color,
            parent: labelResponse.parent,
          },
        ];
        this.labels.sort((a, b) => a.name.localeCompare(b.name));
      });
      return labelResponse;
    } catch (error) {
      console.error("Creating label error", error);
      return error;
    }
  };

  updateLabel = async (
    workspaceSlug: string,
    projectId: string,
    labelId: string,
    labelForm: Partial<LabelForm>,
    user: ICurrentUserResponse
  ) => {
    try {
      const labelResponse: IIssueLabels = await issueService.patchIssueLabel(
        workspaceSlug,
        projectId,
        labelId,
        labelForm,
        user
      );

      const _labels = [...this.labels].map((label) => {
        if (label.id === labelId) {
          return {
            id: labelResponse.id,
            name: labelResponse.name,
            description: labelResponse.description,
            color: labelResponse.color,
            parent: labelResponse.parent,
          };
        }
        return label;
      });

      runInAction(() => {
        this.labels = _labels;
      });
    } catch (error) {
      console.error("Updating label error", error);
      return error;
    }
  };

  deleteLabel = async (
    workspaceSlug: string,
    projectId: string,
    labelId: string,
    user: ICurrentUserResponse
  ) => {
    try {
      issueService.deleteIssueLabel(workspaceSlug, projectId, labelId, user);
      runInAction(() => {
        this.labels = this.labels.filter((label) => label.id !== labelId);
      });
    } catch (error) {
      console.error("Deleting label error", error);
    }
  };
}

export default LabelStore;