<template>
  <div>
    <h1 class="title">{{action}} {{food.name || "[Unnamed Food]"}}</h1>

    <app-validation-errors :errors="validationErrors"></app-validation-errors>

    <div class="field">
      <label class="label is-small-mobile">Name</label>
      <div class="control">
        <input type="text" class="input is-small-mobile" v-model="food.name">
      </div>
    </div>


    <label class="label is-small-mobile">Nutrient Databank Number</label>
    <div class="field has-addons">
      <div class="control">
        <button type="button" class="button" :class="{'is-primary': hasNdbn}"><app-icon :icon="hasNdbn ? 'link-intact' : 'link-broken'" size="sm"></app-icon><span>{{food.ndbn}}</span></button>
      </div>
      <div class="control is-expanded">
        <app-autocomplete
            :inputClass="'is-small-mobile'"
            ref="autocomplete"
            v-model="food.usda_food_name"
            :minLength="2"
            valueAttribute="name"
            labelAttribute="description"
            placeholder=""
            @optionSelected="searchItemSelected"
            :onGetOptions="updateSearchItems"
        >
        </app-autocomplete>
      </div>
      <div v-if="hasNdbn" class="control">
        <button type="button" class="button is-danger" @click="removeNdbn">X</button>
      </div>
    </div>

    <div class="field">
      <label class="label is-small-mobile">Density</label>
      <div class="control">
        <input type="text" class="input is-small-mobile" v-model="food.density">
      </div>
    </div>

    <div class="field">
      <label class="label is-small-mobile">Notes</label>
      <div class="control">
        <textarea type="text" class="textarea is-small-mobile" v-model="food.notes"></textarea>
      </div>
    </div>

    <div class="columns">
      <div class="column">
        <div class="message">
          <div class="message-header">
            Custom Units
          </div>

          <div class="message-body">
            <button class="button" type="button" @click="addUnit">Add Unit</button>

            <table class="table">
              <tr>
                <th>Name</th>
                <th>Grams</th>
                <th></th>
              </tr>
              <tr v-for="unit in visibleFoodUnits" :key="unit.id">
                <td>
                  <div class="control">
                    <input type="text" class="input is-small-mobile" v-model="unit.name">
                  </div>
                </td>
                <td>
                  <div class="control">
                    <input type="text" class="input is-small-mobile" v-model="unit.gram_weight">
                  </div>
                </td>
                <td>
                  <button type="button" class="button is-danger" @click="removeUnit(unit)">X</button>
                </td>
              </tr>
            </table>
          </div>
        </div>
      </div>

      <div class="column">
        <div class="message">
          <div class="message-header">
            NDBN Units
          </div>

          <div class="message-body">

            <table class="table">
              <tr>
                <th>Name</th>
                <th>Grams</th>
              </tr>
              <tr v-for="unit in food.ndbn_units">
                <td>{{unit.description}}</td>
                <td>{{unit.gram_weight}}</td>
              </tr>
            </table>

          </div>
        </div>
      </div>
    </div>

    <div class="message">
      <div class="message-header">
        Nutrition per 100 grams
      </div>

      <div class="message-body">
        <div class="columns is-mobile is-multiline">
          <div v-for="(nutrient, name) in nutrients" :key="name" class="column is-half-mobile is-one-third-tablet">
            <label class="label is-small-mobile">{{nutrient.label}}</label>
            <div class="field has-addons">
              <div class="control is-expanded">
                <input type="text" class="input is-small-mobile" :disabled="hasNdbn" v-model="food[name]">
              </div>
              <div class="control">
                <button type="button" tabindex="-1" class="unit-label button is-static is-small-mobile">{{nutrient.unit}}</button>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>

  </div>
</template>

<script>

  import api from "../lib/Api";

  export default {
    props: {
      food: {
        required: true,
        type: Object
      },
      validationErrors: {
        required: false,
        type: Object,
        default: {}
      },
      action: {
        required: false,
        type: String,
        default: "Editing"
      }
    },

    data() {
      return {
        nutrients: {
          kcal: { label: "Calories", unit: "kcal" },
          protein: { label: "Protein", unit: "g" },
          lipids: { label: "Fat", unit: "g" },
          carbohydrates: { label: "Carbohydrates", unit: "g" },
          water: { label: "Water", unit: "g" },
          sugar: { label: "Sugar", unit: "g" },
          fiber: { label: "Fiber", unit: "g" },
          cholesterol: { label: "Cholesterol", unit: "mg" },
          sodium: { label: "Sodium", unit: "mg" },
          calcium: { label: "Calcium", unit: "mg" },
          iron: { label: "Iron", unit: "mg" },
          magnesium: { label: "Magnesium", unit: "mg" },
          phosphorus: { label: "Phosphorus", unit: "mg" },
          potassium: { label: "Potassium", unit: "mg" },
          zinc: { label: "Zinc", unit: "mg" },
          copper: { label: "Copper", unit: "mg" },
          manganese: { label: "Manganese", unit: "mg" },
          vit_a: { label: "Vitamin A", unit: "μg" },
          vit_b6: { label: "Vitamin B6", unit: "mg" },
          vit_b12: { label: "Vitamin B12", unit: "μg" },
          vit_c: { label: "Vitamin C", unit: "mg" },
          vit_d: { label: "Vitamin D", unit: "μg" },
          vit_e: { label: "Vitamin E", unit: "mg" },
          vit_k: { label: "Vitamin K", unit: "μg" },
          ash: { label: "ash", unit: "g" }

        }
      };
    },

    computed: {
      visibleFoodUnits() {
        return this.food.food_units.filter(iu => iu._destroy !== true);
      },

      hasNdbn() {
        return this.food.ndbn !== null;
      }
    },

    methods: {
      addUnit() {
        this.food.food_units.push({
          id: null,
          name: null,
          gram_weight: null
        });
      },

      removeUnit(unit) {
        if (unit.id) {
          unit._destroy = true;
        } else {
          const idx = this.food.food_units.findIndex(i => i === unit);
          this.food.food_units.splice(idx, 1);
        }
      },

      removeNdbn() {
        this.food.ndbn = null;
        this.food.usda_food_name = null;
        this.food.ndbn_units = [];
      },

      updateSearchItems(text) {
        return api.getUsdaFoodSearch(text)
          .then(data => data.map(f => {
            return {
              name: f.name,
              ndbn: f.ndbn,
              description: ["#", f.ndbn, ", Cal:", f.kcal, ", Carbs:", f.carbohydrates, ", Fat:", f.lipid, ", Protein:", f.protein].join("")
            }
          }));
      },

      searchItemSelected(food) {
        this.food.ndbn = food.ndbn;
        this.food.usda_food_name = food.name;
        this.food.ndbn_units = [];

        this.loadResource(
          api.postIngredientSelectNdbn(this.food)
            .then(i => Object.assign(this.food, i))
        );

      },
    },

    components: {
    }
  }

</script>

<style lang="scss" scoped>

  .unit-label {
    width: 3em;
  }

</style>