import { makeMap } from '@/utils/index';

// 参考https://github.com/vuejs/vue/blob/v2.6.10/src/platforms/web/server/util.js
const isAttr = makeMap(
  'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
    'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
    'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
    'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
    'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
    'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
    'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
    'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
    'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
    'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
    'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
    'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
    'target,title,type,usemap,value,width,wrap'
);

function vModel(self, dataObject, defaultValue) {
  dataObject.props.value = defaultValue;

  dataObject.on.input = (val) => {
    self.$emit('input', val);
  };
}

const componentChild = {
  'el-button': {
    default(h, conf, key) {
      return conf[key];
    }
  },
  'el-input': {
    prepend(h, conf, key) {
      return <template slot="prepend">{conf[key]}</template>;
    },
    append(h, conf, key) {
      return <template slot="append">{conf[key]}</template>;
    }
  },
  'el-select': {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        list.push(
          <el-option
            label={item.label}
            value={item.value}
            disabled={item.disabled}
          ></el-option>
        );
      });
      return list;
    }
  },
  'el-radio-group': {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        if (conf.optionType === 'button') {
 list.push(
            <el-radio-button label={item.value}>{item.label}</el-radio-button>
          ); 
} else {
 list.push(
            <el-radio label={item.value} border={conf.border}>
              {item.label}
            </el-radio>
          ); 
}
      });
      return list;
    }
  },
  'el-checkbox-group': {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach((item) => {
        if (conf.optionType === 'button') {
          list.push(
            <el-checkbox-button label={item.value}>
              {item.label}
            </el-checkbox-button>
          );
        } else {
          list.push(
            <el-checkbox label={item.value} border={conf.border}>
              {item.label}
            </el-checkbox>
          );
        }
      });
      return list;
    }
  },
  'el-upload': {
    'list-type': (h, conf, key) => {
      const list = [];
      if (conf['list-type'] === 'picture-card') {
        list.push(<i class="el-icon-plus"></i>);
      } else {
        list.push(
          <el-button size="small" type="primary" icon="el-icon-upload">
            {conf.buttonText}
          </el-button>
        );
      }
      if (conf.showTip) {
        list.push(
          <div slot="tip" class="el-upload__tip">
            只能上传不超过 {conf.fileSize}
            {conf.sizeUnit} 的{conf.accept}文件
          </div>
        );
      }
      return list;
    }
  }
};

export default {
  render(h) {
    const dataObject = {
      attrs: {},
      props: {},
      on: {},
      style: {}
    };
    const confClone = JSON.parse(JSON.stringify(this.conf));
    const children = [];

    const childObjs = componentChild[confClone.tag];
    if (childObjs) {
      Object.keys(childObjs).forEach((key) => {
        const childFunc = childObjs[key];
        if (confClone[key]) {
          children.push(childFunc(h, confClone, key));
        }
      });
    }

    Object.keys(confClone).forEach((key) => {
      const val = confClone[key];
      if (key === 'vModel') {
        vModel(this, dataObject, confClone.defaultValue);
      } else if (dataObject[key]) {
        dataObject[key] = val;
      } else if (!isAttr(key)) {
        dataObject.props[key] = val;
      } else {
        dataObject.attrs[key] = val;
      }
    });
    return h(this.conf.tag, dataObject, children);
  },
  props: ['conf']
};
