import { alias, gt, or } from "@ember/object/computed";
import { computed } from "@ember/object";
import {
  default as discourseComputed,
  observes,
  on,
} from "discourse-common/utils/decorators";
import { getOwner } from "discourse-common/lib/get-owner";
import { defaultSelectionType, selectionTypes } from "../lib/wizard-mapper";
import { generateName, snakeCase, userProperties } from "../lib/wizard";
import Component from "@ember/component";
import { bind, later } from "@ember/runloop";
import I18n from "I18n";

export default Component.extend({
  classNameBindings: [":mapper-selector", "activeType"],

  showText: computed("activeType", function () {
    return this.showInput("text");
  }),
  showWizardField: computed("activeType", function () {
    return this.showInput("wizardField");
  }),
  showWizardAction: computed("activeType", function () {
    return this.showInput("wizardAction");
  }),
  showUserField: computed("activeType", function () {
    return this.showInput("userField");
  }),
  showUserFieldOptions: computed("activeType", function () {
    return this.showInput("userFieldOptions");
  }),
  showCategory: computed("activeType", function () {
    return this.showInput("category");
  }),
  showTag: computed("activeType", function () {
    return this.showInput("tag");
  }),
  showGroup: computed("activeType", function () {
    return this.showInput("group");
  }),
  showUser: computed("activeType", function () {
    return this.showInput("user");
  }),
  showList: computed("activeType", function () {
    return this.showInput("list");
  }),
  showCustomField: computed("activeType", function () {
    return this.showInput("customField");
  }),
  textEnabled: computed("options.textSelection", "inputType", function () {
    return this.optionEnabled("textSelection");
  }),
  wizardFieldEnabled: computed(
    "options.wizardFieldSelection",
    "inputType",
    function () {
      return this.optionEnabled("wizardFieldSelection");
    }
  ),
  wizardActionEnabled: computed(
    "options.wizardActionSelection",
    "inputType",
    function () {
      return this.optionEnabled("wizardActionSelection");
    }
  ),
  customFieldEnabled: computed(
    "options.customFieldSelection",
    "inputType",
    function () {
      return this.optionEnabled("customFieldSelection");
    }
  ),
  userFieldEnabled: computed(
    "options.userFieldSelection",
    "inputType",
    function () {
      return this.optionEnabled("userFieldSelection");
    }
  ),
  userFieldOptionsEnabled: computed(
    "options.userFieldOptionsSelection",
    "inputType",
    function () {
      return this.optionEnabled("userFieldOptionsSelection");
    }
  ),
  categoryEnabled: computed(
    "options.categorySelection",
    "inputType",
    function () {
      return this.optionEnabled("categorySelection");
    }
  ),
  tagEnabled: computed("options.tagSelection", "inputType", function () {
    return this.optionEnabled("tagSelection");
  }),
  groupEnabled: computed("options.groupSelection", "inputType", function () {
    return this.optionEnabled("groupSelection");
  }),
  userEnabled: computed("options.userSelection", "inputType", function () {
    return this.optionEnabled("userSelection");
  }),
  listEnabled: computed("options.listSelection", "inputType", function () {
    return this.optionEnabled("listSelection");
  }),

  groups: alias("site.groups"),
  categories: alias("site.categories"),
  showComboBox: or(
    "showWizardField",
    "showWizardAction",
    "showUserField",
    "showUserFieldOptions",
    "showCustomField"
  ),
  showMultiSelect: or("showCategory", "showGroup"),
  hasTypes: gt("selectorTypes.length", 1),
  showTypes: false,

  didInsertElement() {
    if (
      !this.activeType ||
      (this.activeType && !this[`${this.activeType}Enabled`])
    ) {
      later(() => this.resetActiveType());
    }

    $(document).on("click", bind(this, this.documentClick));
  },

  willDestroyElement() {
    $(document).off("click", bind(this, this.documentClick));
  },

  documentClick(e) {
    if (this._state == "destroying") {return;}
    let $target = $(e.target);

    if (!$target.parents(".type-selector").length && this.showTypes) {
      this.set("showTypes", false);
    }
  },

  @discourseComputed
  selectorTypes() {
    return selectionTypes
      .filter((type) => this[`${type}Enabled`])
      .map((type) => ({ type, label: this.typeLabel(type) }));
  },

  @discourseComputed("activeType")
  activeTypeLabel(activeType) {
    return this.typeLabel(activeType);
  },

  typeLabel(type) {
    return type
      ? I18n.t(`admin.wizard.selector.label.${snakeCase(type)}`)
      : null;
  },

  comboBoxAllowAny: or("showWizardField", "showWizardAction"),

  @discourseComputed
  showController() {
    return getOwner(this).lookup("controller:admin-wizards-wizard-show");
  },

  @discourseComputed(
    "activeType",
    "showController.wizardFields.[]",
    "showController.wizard.actions.[]",
    "showController.userFields.[]",
    "showController.currentField.id",
    "showController.currentAction.id",
    "showController.customFields"
  )
  comboBoxContent(
    activeType,
    wizardFields,
    wizardActions,
    userFields,
    currentFieldId,
    currentActionId,
    customFields
  ) {
    let content;

    if (activeType === "wizardField") {
      content = wizardFields;

      if (this.options.context === "field") {
        content = content.filter((field) => field.id !== currentFieldId);
      }
    }

    if (activeType === "wizardAction") {
      content = wizardActions.map((a) => ({
        id: a.id,
        label: `${generateName(a.type)} (${a.id})`,
        type: a.type,
      }));

      if (this.options.context === "action") {
        content = content.filter((a) => a.id !== currentActionId);
      }
    }

    if (activeType === "userField") {
      content = userProperties
        .map((f) => ({
          id: f,
          name: generateName(f),
        }))
        .concat(userFields || []);

      if (
        this.options.context === "action" &&
        this.inputType === "association" &&
        this.selectorType === "key"
      ) {
        const excludedFields = ["username", "email", "trust_level"];
        content = content.filter(
          (userField) => excludedFields.indexOf(userField.id) === -1
        );
      }
    }

    if (activeType === "userFieldOptions") {
      content = userFields;
    }

    if (activeType === "customField") {
      content = customFields;
    }

    return content;
  },

  @discourseComputed("activeType")
  multiSelectContent(activeType) {
    return {
      category: this.categories,
      group: this.groups,
      list: "",
    }[activeType];
  },

  @discourseComputed("activeType", "inputType")
  placeholderKey(activeType, inputType) {
    if (
      activeType === "text" &&
      this.options[`${this.selectorType}Placeholder`]
    ) {
      return this.options[`${this.selectorType}Placeholder`];
    } else {
      return `admin.wizard.selector.placeholder.${snakeCase(activeType)}`;
    }
  },

  @discourseComputed("activeType")
  multiSelectOptions(activeType) {
    let result = {
      none: this.placeholderKey,
    };

    if (activeType === "list") {
      result.allowAny = true;
    }

    return result;
  },

  optionEnabled(type) {
    const options = this.options;
    if (!options) {return false;}

    const option = options[type];
    if (option === true) {return true;}
    if (typeof option !== "string") {return false;}

    return option.split(",").filter((option) => {
      return [this.selectorType, this.inputType].indexOf(option) !== -1;
    }).length;
  },

  showInput(type) {
    return this.activeType === type && this[`${type}Enabled`];
  },

  changeValue(value) {
    this.set("value", value);
    this.onUpdate("selector", this.activeType);
  },

  @observes("inputType")
  resetActiveType() {
    this.set(
      "activeType",
      defaultSelectionType(this.selectorType, this.options)
    );
  },

  actions: {
    toggleType(type) {
      this.set("activeType", type);
      this.set("showTypes", false);
      this.set("value", null);
      this.onUpdate("selector");
    },

    toggleTypes() {
      this.toggleProperty("showTypes");
    },

    changeValue(value) {
      this.changeValue(value);
    },

    changeInputValue(event) {
      this.changeValue(event.target.value);
    },

    changeUserValue(previousValue, value) {
      this.changeValue(value);
    },
  },
});