<template>
  <div
    class="list-group list-button-horizontal d-flex flex-column w-100"
    :class="[(errors.length > 0 || hasError) ? 'has-error' : '']"
    @keyup.space="triggerButton()"
    @keyup.up="handleKeyupArrow()"
    @keyup.down="handleKeyupArrow()"
    @keyup.left="handleKeyupArrow()"
    @keyup.right="handleKeyupArrow()"
  >
    <input
      :type="isMultiSelect ? 'checkbox' : 'radio'"
      :id="buttonID"
      :name="groupName"
      :aria-required="isRequired"
      v-model="checkValue"
      :checked="checkValue"
      @change="handleInputChange()"
    />
    <label
      tabindex="-1"
      :for="buttonID"
      :aria-label="buttonLabel"
      class="d-flex flex-column justify-content-center py-3 px-4"
      @mouseup="triggerButton()"
    >
      <span
        class="m-0"
        :class="textPosition"
      >
        {{buttonLabel}}
      </span>
      <span
        v-if="buttonLabelSubCopy"
        class="m-0 small"
        :class="textPosition"
      >
        {{ buttonLabelSubCopy }}
      </span>
      <span 
        v-if="screenReaderOnlyText" 
        class="sr-only"
      >
        {{ screenReaderOnlyText }}
      </span>
      <loader
        v-if="isLoaderDisplayed && selectingInitiatesLoad"
        :class="[loaderColor, loaderPosition]"
      />
    </label>
  </div>
</template>

<script>
import { useField } from "vee-validate";
import loader from "@/ux-components/loader/loader";
import { queryStrings } from "@/constants/query-strings";

export default {
  name: "listButtonHorizontal",
  props: {
    isMultiSelect: Boolean,
    groupName: String,
    buttonID: String,
    buttonLabel: String,
    buttonLabelSubCopy: String,
    screenReaderOnlyText: String,
    textPosition: String,
    selectingInitiatesLoad: Boolean,
    loaderColor: String,
    loaderPosition: String,
    isRequired: Boolean,
    value: {
      // Field initial value
      type: String,
      default: "",
    },
    validationRules: String,
    selectedValues: [Array, String],
    hasError: Boolean,
    valueToLogType: String,
  },
  data() {
    return {
      isLoaderDisplayed: false,
      checkValue: Boolean,
    };
  },
  created() {
    if (Array.isArray(this.selectedValues)) {
      this.checkValue = this.isMultiSelect
        ? this.selectedValues.includes(this.value)
        : this.selectedValues[0] == this.value;
    }
  },
  methods: {
    displayLoader() {
      this.isLoaderDisplayed = true;
    },
    handleInputChange() {
        if(!this.selectingInitiatesLoad) {
          this.handleCheckChange();
        }
    },
    handleKeyupArrow() {
      if (this.isMultiSelect) {
        return; // Prevent arrow keys from doing anything if element is a checkbox
      }

      if(!this.selectingInitiatesLoad) {
        this.handleCheckChange();
      }
    },
    triggerButton() {
      if(this.selectingInitiatesLoad) {
        this.displayLoader();
          this.handleCheckChange();
      }
      
      this.pushEventToGA(this.$route.query[queryStrings.FMG_PAGE], this.GaActions.CLICKED, this.value.toString(), true, this.valueToLogType);
    },
    handleCheckChange() {
      const emitEvent = {
        checkValue: this.checkValue, // only read on checkboxes, on handleCheckedChanged on button-question
        value: this.value,
        buttonId: this.buttonID && this.buttonID.toString(),
      };

      this.handleChange(this.value);
      this.$emit("isCheckedChanged", emitEvent);
      this.$emit("update:modelValue", emitEvent);
    }
  },
  components: {
    loader,
  },
  setup(props) {
    const inputType = props.isMultiSelect ? "checkbox" : "radio";

    const fieldOptions = {
      type: inputType,
      checkedValue: props.value,
      potentialInitialValue: props.selectedValues,
    };

    // Set initialValue for validation setup if pre-selected
    // NOTE: props.selectedValues could be an array of strings, or an array of integers...
    if (props.selectedValues && (props.selectedValues.includes(props.value) || props.selectedValues.includes(parseInt(props.value)))) {
      fieldOptions['initialValue'] = fieldOptions.potentialInitialValue;
    }

    const {
      handleChange,
      errors,
    } = useField(props.groupName, props.validationRules, fieldOptions);

    return {
      handleChange,
      errors,
      fieldOptions, // only need to expose this for unit test purposes
    };
  },
};
</script>

<style lang="scss">
.list-button-horizontal {
  input[type="radio"],
  input[type="checkbox"] {
    position: absolute;
    height: 0;
    opacity: 0;
    width: 0;

    &:focus-visible + label {
      box-shadow: 0 0 0 2.5px $blue;
      z-index: 2;
    }
    &:focus + label {
      box-shadow: 0 0 0 2.5px $blue;
      z-index: 3;
    }
    &:checked + label {
      background: $blue-100;
      box-shadow: 0 0 0 1px $blue;
      outline: none;
      z-index: 2;
    }
    &:checked:focus + label {
      box-shadow: 0 0 0 2.5px $blue;
    }
    &:checked + label p:first-child {
      font-weight: 500;
    }
  }
  label {
    outline: none;
    position: relative;
    background: $white;
    transition: all 150ms linear;
    border: 1px solid $gray-500;
    border-radius: 0;
    width: 100%;
    color: $gray-600;
    &:hover {
      @include media-breakpoint-up(sm) {
        box-shadow: 0 0 0 4px $blue-300;
        cursor: pointer;
        z-index: 4 !important;
      }
    }
    + p {
      display: none;
    }
    span {
      font-size: .875rem;
    }
  }  
}

.col {
  &:first-of-type {
    .list-button-horizontal {
      label {
        border-bottom-left-radius: 0.5rem;
        border-top-left-radius: 0.5rem;
        z-index: 2;
      }
    }
  }

  &:last-of-type {
    .list-button-horizontal {
      label {
        border-bottom-right-radius: 0.5rem;
        border-top-right-radius: 0.5rem;
      }
    }
  }
}
</style>
