import Clipboard from 'clipboard';

export function isNotNull(value) {
  return value !== null && value !== undefined;
}

export function isEmptyStr(str) {
  //return (str === undefined) || (!str) || (!/[^\s]/.test(str));
  return str === undefined || (!str && str !== 0 && str !== '0') || !/[^\s]/.test(str);
}

/**
 * 下划线转驼峰
 * @param string
 * @returns {*}
 */
export function underLine2CamelCase(string) {
  return string.replace(/_([a-z])/g, function (all, letter) {
    return letter.toUpperCase();
  });
}

export function getCamelCase(val) {
  let tempentyame = underLine2CamelCase(val);
  return tempentyame.substring(0, 1).toUpperCase() + tempentyame.substring(1);
}

export const generateId = function () {
  return Math.floor(Math.random() * 100000 + Math.random() * 20000 + Math.random() * 5000);
};

export const deepClone = function (origin) {
  if (origin === undefined) {
    return undefined;
  }

  return JSON.parse(JSON.stringify(origin));
};

export const overwriteObj = function (obj1, obj2) {
  /* 浅拷贝对象属性，obj2覆盖obj1 */
  // for (let prop in obj2) {
  //   if (obj2.hasOwnProperty(prop)) {
  //     obj1[prop] = obj2[prop]
  //   }
  // }

  Object.keys(obj2).forEach((prop) => {
    obj1[prop] = obj2[prop];
  });
};

export const addWindowResizeHandler = function (handler) {
  let oldHandler = window.onresize;
  if (typeof window.onresize != 'function') {
    window.onresize = handler;
  } else {
    window.onresize = function () {
      oldHandler();
      handler();
    };
  }
};

const createStyleSheet = function () {
  let head = document.head || document.getElementsByTagName('head')[0];
  let style = document.createElement('style');
  style.type = 'text/css';
  head.appendChild(style);
  return style.sheet;
};

export const insertCustomCssToHead = function (cssCode, formId = '') {
  let head = document.getElementsByTagName('head')[0];
  let oldStyle = document.getElementById('vform-custom-css');
  if (oldStyle) {
    head.removeChild(oldStyle); //先清除后插入！！
  }
  if (formId) {
    oldStyle = document.getElementById('vform-custom-css' + '-' + formId);
    !!oldStyle && head.removeChild(oldStyle); //先清除后插入！！
  }

  let newStyle = document.createElement('style');
  newStyle.type = 'text/css';
  newStyle.rel = 'stylesheet';
  newStyle.id = formId ? 'vform-custom-css' + '-' + formId : 'vform-custom-css';
  try {
    newStyle.appendChild(document.createTextNode(cssCode));
  } catch (ex) {
    newStyle.styleSheet.cssText = cssCode;
  }

  head.appendChild(newStyle);
};

export const insertGlobalFunctionsToHtml = function (functionsCode, formId = '') {
  let bodyEle = document.getElementsByTagName('body')[0];
  let oldScriptEle = document.getElementById('v_form_global_functions');
  !!oldScriptEle && bodyEle.removeChild(oldScriptEle); //先清除后插入！！
  if (formId) {
    oldScriptEle = document.getElementById('v_form_global_functions' + '-' + formId);
    !!oldScriptEle && bodyEle.removeChild(oldScriptEle); //先清除后插入！！
  }

  let newScriptEle = document.createElement('script');
  newScriptEle.id = formId ? 'v_form_global_functions' + '-' + formId : 'v_form_global_functions';
  newScriptEle.type = 'text/javascript';
  newScriptEle.innerHTML = functionsCode;
  bodyEle.appendChild(newScriptEle);
};

export const optionExists = function (optionsObj, optionName) {
  if (!optionsObj) {
    return false;
  }

  return Object.keys(optionsObj).indexOf(optionName) > -1;
};

export const loadRemoteScript = function (srcPath, callback) {
  /*加载远程js，加载成功后执行回调函数*/
  let sid = encodeURIComponent(srcPath);
  let oldScriptEle = document.getElementById(sid);

  if (!oldScriptEle) {
    let s = document.createElement('script');
    s.src = srcPath;
    s.id = sid;
    document.body.appendChild(s);

    s.onload = s.onreadystatechange = function (_, isAbort) {
      /* 借鉴自ace.js */
      if (isAbort || !s.readyState || s.readyState === 'loaded' || s.readyState === 'complete') {
        s = s.onload = s.onreadystatechange = null;
        if (!isAbort) {
          callback();
        }
      }
    };
  }
};

export function traverseFieldWidgets(widgetList, handler, parent = null) {
  if (!widgetList) {
    return;
  }

  widgetList.map((w) => {
    if (w.formItemFlag) {
      handler(w, parent);
    } else if (w.type === 'grid') {
      w.cols.map((col) => {
        traverseFieldWidgets(col.widgetList, handler, w);
      });
    } else if (w.type === 'table') {
      w.rows.map((row) => {
        row.cols.map((cell) => {
          traverseFieldWidgets(cell.widgetList, handler, w);
        });
      });
    } else if (w.type === 'tab') {
      w.tabs.map((tab) => {
        traverseFieldWidgets(tab.widgetList, handler, w);
      });
    } else if (w.type === 'sub-form') {
      traverseFieldWidgets(w.widgetList, handler, w);
    } else if (w.category === 'container') {
      //自定义容器
      traverseFieldWidgets(w.widgetList, handler, w);
    }
  });
}

export function traverseContainerWidgets(widgetList, handler) {
  if (!widgetList) {
    return;
  }

  widgetList.map((w) => {
    if (w.category === 'container') {
      handler(w);
    }

    if (w.type === 'grid') {
      w.cols.map((col) => {
        traverseContainerWidgets(col.widgetList, handler);
      });
    } else if (w.type === 'table') {
      w.rows.map((row) => {
        row.cols.map((cell) => {
          traverseContainerWidgets(cell.widgetList, handler);
        });
      });
    } else if (w.type === 'tab') {
      w.tabs.map((tab) => {
        traverseContainerWidgets(tab.widgetList, handler);
      });
    } else if (w.type === 'sub-form') {
      traverseContainerWidgets(w.widgetList, handler);
    } else if (w.category === 'container') {
      //自定义容器
      traverseContainerWidgets(w.widgetList, handler);
    }
  });
}

export function traverseAllWidgets(widgetList, handler) {
  if (!widgetList) {
    return;
  }

  widgetList.map((w) => {
    handler(w);

    if (w.type === 'grid') {
      w.cols.map((col) => {
        handler(col);
        traverseAllWidgets(col.widgetList, handler);
      });
    } else if (w.type === 'table') {
      w.rows.map((row) => {
        row.cols.map((cell) => {
          handler(cell);
          traverseAllWidgets(cell.widgetList, handler);
        });
      });
    } else if (w.type === 'tab') {
      w.tabs.map((tab) => {
        traverseAllWidgets(tab.widgetList, handler);
      });
    } else if (w.type === 'sub-form') {
      traverseAllWidgets(w.widgetList, handler);
    } else if (w.category === 'container') {
      //自定义容器
      traverseAllWidgets(w.widgetList, handler);
    }
  });
}

function handleWidgetForTraverse(widget, handler) {
  if (widget.category) {
    traverseFieldWidgetsOfContainer(widget, handler);
  } else if (widget.formItemFlag) {
    handler(widget);
  }
}

/**
 * 遍历容器内的字段组件
 * @param con
 * @param handler
 */
export function traverseFieldWidgetsOfContainer(con, handler) {
  if (con.type === 'grid') {
    con.cols.forEach((col) => {
      col.widgetList.forEach((cw) => {
        handleWidgetForTraverse(cw, handler);
      });
    });
  } else if (con.type === 'table') {
    con.rows.forEach((row) => {
      row.cols.forEach((cell) => {
        cell.widgetList.forEach((cw) => {
          handleWidgetForTraverse(cw, handler);
        });
      });
    });
  } else if (con.type === 'tab') {
    con.tabs.forEach((tab) => {
      tab.widgetList.forEach((cw) => {
        handleWidgetForTraverse(cw, handler);
      });
    });
  } else if (con.type === 'sub-form') {
    con.widgetList.forEach((cw) => {
      handleWidgetForTraverse(cw, handler);
    });
  } else if (con.category === 'container') {
    //自定义容器
    con.widgetList.forEach((cw) => {
      handleWidgetForTraverse(cw, handler);
    });
  }
}

/**
 * 获取所有字段组件
 * @param widgetList
 * @returns {[]}
 */
export function getAllFieldWidgets(widgetList) {
  if (!widgetList) {
    return [];
  }

  let result = [];
  let handlerFn = (w) => {
    result.push({
      type: w.type,
      name: w.options.name,
      field: w
    });
  };
  traverseFieldWidgets(widgetList, handlerFn);

  return result;
}

/**
 * 获取所有容器组件
 * @param widgetList
 * @returns {[]}
 */
export function getAllContainerWidgets(widgetList) {
  if (!widgetList) {
    return [];
  }

  let result = [];
  let handlerFn = (w) => {
    result.push({
      type: w.type,
      name: w.options.name,
      container: w
    });
  };
  traverseContainerWidgets(widgetList, handlerFn);

  return result;
}

export function copyToClipboard(content, clickEvent, $message, successMsg, errorMsg) {
  const clipboard = new Clipboard(clickEvent.target, {
    text: () => content
  });

  clipboard.on('success', () => {
    $message.success(successMsg);
    clipboard.destroy();
  });

  clipboard.on('error', () => {
    $message.error(errorMsg);
    clipboard.destroy();
  });

  clipboard.onClick(clickEvent);
}

export function getQueryParam(variable) {
  let query = window.location.search.substring(1);
  let vars = query.split('&');
  for (let i = 0; i < vars.length; i++) {
    let pair = vars[i].split('=');
    if (pair[0] == variable) {
      return pair[1];
    }
  }

  return undefined;
}

export function getDefaultFormConfig() {
  return {
    modelName: 'formData',
    refName: 'vForm',
    rulesName: 'rules',
    labelWidth: 80,
    labelPosition: 'left',
    size: '',
    labelAlign: 'label-left-align',
    cssCode: '',
    customClass: [],
    functions: '', //全局函数
    layoutType: 'PC',
    jsonVersion: 3,

    onFormCreated: '',
    onFormMounted: '',
    onFormDataChange: ''
  };
}

export function buildDefaultFormJson() {
  return {
    widgetList: [],
    formConfig: deepClone(getDefaultFormConfig())
  };
}

/**
 * 触发 window.resize
 */
export function triggerWindowResizeEvent() {
  const event = document.createEvent('HTMLEvents');
  event.initEvent('resize', true, true);
  event.eventType = 'message';
  window.dispatchEvent(event);
}