<template>
  <mu-form-item :label="currentConfig.label" :prop="currentConfig.key" :currentConfig="config.inline"
                :tip="currentConfig.tip" :validators="currentConfig.validators" trigger="blur">
    <el-input class="mu-textarea" :class="'mu-'+ currentConfig.size"
              v-model="currentValue"
              type="textarea"
              :rows="currentConfig.rows"
              :readonly="currentConfig.readonly"
              :maxlength="currentConfig.maxlength"
              :show-word-limit="currentConfig.showWordLimit"
              :placeholder="currentConfig.placeholder"
              :disabled="currentConfig.disabled"
              @change="handleChange"
              @focus="handleFocus"
              @blur="handleBlur"></el-input>
  </mu-form-item>
</template>

<script lang="ts">
  import { Component, Prop, Vue, Watch, Emit } from 'vue-property-decorator';
  // import { DtFormItem } from "src/components";

  type Size = 'small' | 'medium' | 'large';

  interface InputConfig {
    name?: string,
    size?: Size,
    disabled?: boolean,
    readonly?: boolean,
    placeholder?: string
    label?: string,
    key?: string,
    inline?: boolean,
    tip?: string,
    validators?: any,
    maxlength?: string,
    rows?: number,
    showWordLimit?: boolean
  }

  @Component({
    name: 'mcTextarea',
    components: {
      // DtFormItem
    }
  })
  export default class extends Vue {
    @Prop({ default: () => [] }) private value!: string | undefined;
    @Prop({ default: () => [] }) private config?: any;
    private currentValue: string = this.value;
    private defaultConfig: any = {
      size: 'medium',
      placeholder: '请输入',
      showWordLimit: true,
      rows: 2,
      maxlength: 100
    };

    // 合并默认数据
    get currentConfig() {
      const result = this.config;
      Object.keys(this.defaultConfig).forEach((key: string) => {
        if (this.config[key] === undefined) result[key] = this.defaultConfig[key];
      });
      return result;
    }

    // 检测值
    @Watch("value")
    onValueChanged(val: string) {
      this.currentValue = val;
    }

    /**
     * 输入框值改变
     * @author tanxj
     * @param value 值
     */
    @Emit('on-change')
    handleChange(value: string) {
      this.$emit('input', value);
    }

    /**
     * 失去焦点事件
     * @author tanxj
     * @param any event 事件
     */
    handleBlur(event: any) {
      this.$emit('on-blur', event.target.value, event);
    }

    /**
     * 使input 获取焦点
     * @author tanxj
     * @param any event 事件
     */
    handleFocus(event: any) {
      this.$emit('on-focus', event);
    }
  }
</script>

<style scoped>

</style>
