/*
* Add heads elements into row
*/
const createHeadsIntoRow = (table, row) => {
   const cells = row.querySelectorAll(".td");
   cells.forEach((cell, i) => {
      createHeadIntoCell(table, cell, i);
   });
};

/*
* Add head into cell
*/
const createHeadIntoCell = (table, cell, i) => {
   const elem = document.createElement("div");
   elem.classList.add("head");
   elem.innerHTML = theadContent(table, i);
   cell.appendChild(elem);            
}

/*
* Get text in columns thead
*/
const theadContent = (table, i) => { 
   const thead = table.querySelectorAll(".thead .td");
   let content;
   thead.forEach((item, j) => { 
      if (i === j) {
         content = item.textContent;
      }
   }, i);
   return content;
};

/*
* Remove heads from element
*/
const removeHeadsFrom = (element) => {
   const heads = element.querySelectorAll(".head");
   heads.forEach(head => {
      head.parentNode.removeChild(head);
   });
};

/*
*  Insert head before cell
*/
const insertHeadBeforeCell = (row, cell) => {
   let head = cell.querySelector('.head');
   head.classList.add("td");
   row.insertBefore(head, cell);
};

/*
* Loop on each table
*/
tables.forEach(t => {
   const table = document.querySelector(`#${t.id}`);
   
   /*
   * Responsive rules limits
   */
   const minLG = window.matchMedia(`(min-width: ${t.md_lg + 1}px)`); 
   const maxMD = window.matchMedia(`(max-width: ${t.md_lg}px)`); 
   const maxSM = window.matchMedia(`(max-width: ${t.sm_md}px)`);
   
   /*
   * Medium screens rule
   */
   const mediumScreen = rule => {
      if (rule.matches) { 
         console.log('medium');
         const rows = [...table.querySelectorAll(".tr")];
         rows.shift(); // vire le premier rang
         rows.forEach(row => {
            createHeadsIntoRow(table, row);
         });
      } else { 
         console.log('not medium');
         removeHeadsFrom(table);
      }
   };
   
   /*
   * Small screens rule
   */
   const smallScreen = (rule) => {
      if (rule.matches) {
         console.log('small');
         const rows = [...table.querySelectorAll(".tr")];
         rows.shift();
         rows.forEach(row => {;
            const cells = row.querySelectorAll(".td");
            cells.forEach(cell => {
               insertHeadBeforeCell(row, cell);
            });
         });
      } else {
         console.log('not small');
         const rows = [...table.querySelectorAll(".tr")];
         rows.shift();
         rows.forEach(row => {;
            removeHeadsFrom(row);
            // Large screen exception !
            if (!minLG.matches) {
               createHeadsIntoRow(table, row);
            }
         });
      }
   };
   
   mediumScreen(maxMD);
   maxMD.addListener(mediumScreen);
   
   smallScreen(maxSM);
   maxSM.addListener(smallScreen);
});